]> git.sesse.net Git - ffmpeg/blobdiff - avconv.c
mathops: Drop disabled alternative mid_pred() implementation
[ffmpeg] / avconv.c
index 68e332997cb9c6af8b215a5d997d5537c3ba5bcb..59eb3009b1458d2c4d6740ff5e6a9eee7a1c001a 100644 (file)
--- a/avconv.c
+++ b/avconv.c
@@ -1,6 +1,6 @@
 /*
  * avconv main
- * Copyright (c) 2000-2011 The libav developers.
+ * Copyright (c) 2000-2011 The Libav developers
  *
  * This file is part of Libav.
  *
@@ -38,6 +38,7 @@
 #include "libavutil/parseutils.h"
 #include "libavutil/samplefmt.h"
 #include "libavutil/fifo.h"
+#include "libavutil/internal.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/dict.h"
 #include "libavutil/mathematics.h"
@@ -86,15 +87,13 @@ static FILE *vstats_file;
 
 static int nb_frames_drop = 0;
 
-
+static int want_sdp = 1;
 
 #if HAVE_PTHREADS
 /* signal to input threads that they should exit; set by the main thread */
 static int transcoding_finished;
 #endif
 
-#define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
-
 InputStream **input_streams = NULL;
 int        nb_input_streams = 0;
 InputFile   **input_files   = NULL;
@@ -145,46 +144,74 @@ static void avconv_cleanup(int ret)
     int i, j;
 
     for (i = 0; i < nb_filtergraphs; i++) {
-        avfilter_graph_free(&filtergraphs[i]->graph);
-        for (j = 0; j < filtergraphs[i]->nb_inputs; j++) {
-            av_freep(&filtergraphs[i]->inputs[j]->name);
-            av_freep(&filtergraphs[i]->inputs[j]);
-        }
-        av_freep(&filtergraphs[i]->inputs);
-        for (j = 0; j < filtergraphs[i]->nb_outputs; j++) {
-            av_freep(&filtergraphs[i]->outputs[j]->name);
-            av_freep(&filtergraphs[i]->outputs[j]);
-        }
-        av_freep(&filtergraphs[i]->outputs);
-        av_freep(&filtergraphs[i]->graph_desc);
+        FilterGraph *fg = filtergraphs[i];
+        avfilter_graph_free(&fg->graph);
+        for (j = 0; j < fg->nb_inputs; j++) {
+            while (av_fifo_size(fg->inputs[j]->frame_queue)) {
+                AVFrame *frame;
+                av_fifo_generic_read(fg->inputs[j]->frame_queue, &frame,
+                                     sizeof(frame), NULL);
+                av_frame_free(&frame);
+            }
+            av_fifo_free(fg->inputs[j]->frame_queue);
+            av_buffer_unref(&fg->inputs[j]->hw_frames_ctx);
+            av_freep(&fg->inputs[j]->name);
+            av_freep(&fg->inputs[j]);
+        }
+        av_freep(&fg->inputs);
+        for (j = 0; j < fg->nb_outputs; j++) {
+            av_freep(&fg->outputs[j]->name);
+            av_freep(&fg->outputs[j]->formats);
+            av_freep(&fg->outputs[j]->channel_layouts);
+            av_freep(&fg->outputs[j]->sample_rates);
+            av_freep(&fg->outputs[j]);
+        }
+        av_freep(&fg->outputs);
+        av_freep(&fg->graph_desc);
+
         av_freep(&filtergraphs[i]);
     }
     av_freep(&filtergraphs);
 
     /* close files */
     for (i = 0; i < nb_output_files; i++) {
-        AVFormatContext *s = output_files[i]->ctx;
+        OutputFile *of = output_files[i];
+        AVFormatContext *s = of->ctx;
         if (s && s->oformat && !(s->oformat->flags & AVFMT_NOFILE) && s->pb)
             avio_close(s->pb);
         avformat_free_context(s);
-        av_dict_free(&output_files[i]->opts);
+        av_dict_free(&of->opts);
+
         av_freep(&output_files[i]);
     }
     for (i = 0; i < nb_output_streams; i++) {
-        AVBitStreamFilterContext *bsfc = output_streams[i]->bitstream_filters;
-        while (bsfc) {
-            AVBitStreamFilterContext *next = bsfc->next;
-            av_bitstream_filter_close(bsfc);
-            bsfc = next;
-        }
-        output_streams[i]->bitstream_filters = NULL;
-        av_frame_free(&output_streams[i]->filtered_frame);
+        OutputStream *ost = output_streams[i];
+
+        for (j = 0; j < ost->nb_bitstream_filters; j++)
+            av_bsf_free(&ost->bsf_ctx[j]);
+        av_freep(&ost->bsf_ctx);
+        av_freep(&ost->bitstream_filters);
+
+        av_frame_free(&ost->filtered_frame);
 
-        av_parser_close(output_streams[i]->parser);
+        av_parser_close(ost->parser);
+        avcodec_free_context(&ost->parser_avctx);
 
-        av_freep(&output_streams[i]->forced_keyframes);
-        av_freep(&output_streams[i]->avfilter);
-        av_freep(&output_streams[i]->logfile_prefix);
+        av_freep(&ost->forced_keyframes);
+        av_freep(&ost->avfilter);
+        av_freep(&ost->logfile_prefix);
+
+        avcodec_free_context(&ost->enc_ctx);
+
+        if (ost->muxing_queue) {
+            while (av_fifo_size(ost->muxing_queue)) {
+                AVPacket pkt;
+                av_log(NULL, AV_LOG_INFO, "after av_fifo_size()\n");
+                av_fifo_generic_read(ost->muxing_queue, &pkt, sizeof(pkt), NULL);
+                av_packet_unref(&pkt);
+            }
+            av_fifo_free(ost->muxing_queue);
+        }
         av_freep(&output_streams[i]);
     }
     for (i = 0; i < nb_input_files; i++) {
@@ -192,11 +219,16 @@ static void avconv_cleanup(int ret)
         av_freep(&input_files[i]);
     }
     for (i = 0; i < nb_input_streams; i++) {
-        av_frame_free(&input_streams[i]->decoded_frame);
-        av_frame_free(&input_streams[i]->filter_frame);
-        av_dict_free(&input_streams[i]->opts);
-        av_freep(&input_streams[i]->filters);
-        av_freep(&input_streams[i]->hwaccel_device);
+        InputStream *ist = input_streams[i];
+
+        av_frame_free(&ist->decoded_frame);
+        av_frame_free(&ist->filter_frame);
+        av_dict_free(&ist->decoder_opts);
+        av_freep(&ist->filters);
+        av_freep(&ist->hwaccel_device);
+
+        avcodec_free_context(&ist->dec_ctx);
+
         av_freep(&input_streams[i]);
     }
 
@@ -237,76 +269,38 @@ static void abort_codec_experimental(AVCodec *c, int encoder)
             "results.\nAdd '-strict experimental' if you want to use it.\n",
             codec_string, c->name);
     codec = encoder ? avcodec_find_encoder(c->id) : avcodec_find_decoder(c->id);
-    if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
+    if (!(codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL))
         av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
                codec_string, codec->name);
     exit_program(1);
 }
 
-/*
- * Update the requested input sample format based on the output sample format.
- * This is currently only used to request float output from decoders which
- * support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
- * Ideally this will be removed in the future when decoders do not do format
- * conversion and only output in their native format.
- */
-static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
-                              AVCodecContext *enc)
+static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost)
 {
-    /* if sample formats match or a decoder sample format has already been
-       requested, just return */
-    if (enc->sample_fmt == dec->sample_fmt ||
-        dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
-        return;
+    AVFormatContext *s = of->ctx;
+    AVStream *st = ost->st;
+    int ret;
 
-    /* if decoder supports more than one output format */
-    if (dec_codec && dec_codec->sample_fmts &&
-        dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
-        dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
-        const enum AVSampleFormat *p;
-        int min_dec = INT_MAX, min_inc = INT_MAX;
-        enum AVSampleFormat dec_fmt = AV_SAMPLE_FMT_NONE;
-        enum AVSampleFormat inc_fmt = AV_SAMPLE_FMT_NONE;
-
-        /* find a matching sample format in the encoder */
-        for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
-            if (*p == enc->sample_fmt) {
-                dec->request_sample_fmt = *p;
-                return;
-            } else {
-                enum AVSampleFormat dfmt = av_get_packed_sample_fmt(*p);
-                enum AVSampleFormat efmt = av_get_packed_sample_fmt(enc->sample_fmt);
-                int fmt_diff = 32 * abs(dfmt - efmt);
-                if (av_sample_fmt_is_planar(*p) !=
-                    av_sample_fmt_is_planar(enc->sample_fmt))
-                    fmt_diff++;
-                if (dfmt == efmt) {
-                    min_inc = fmt_diff;
-                    inc_fmt = *p;
-                } else if (dfmt > efmt) {
-                    if (fmt_diff < min_inc) {
-                        min_inc = fmt_diff;
-                        inc_fmt = *p;
-                    }
-                } else {
-                    if (fmt_diff < min_dec) {
-                        min_dec = fmt_diff;
-                        dec_fmt = *p;
-                    }
-                }
+    if (!of->header_written) {
+        AVPacket tmp_pkt;
+        /* the muxer is not initialized yet, buffer the packet */
+        if (!av_fifo_space(ost->muxing_queue)) {
+            int new_size = FFMIN(2 * av_fifo_size(ost->muxing_queue),
+                                 ost->max_muxing_queue_size);
+            if (new_size <= av_fifo_size(ost->muxing_queue)) {
+                av_log(NULL, AV_LOG_ERROR,
+                       "Too many packets buffered for output stream %d:%d.\n",
+                       ost->file_index, ost->st->index);
+                exit_program(1);
             }
+            ret = av_fifo_realloc2(ost->muxing_queue, new_size);
+            if (ret < 0)
+                exit_program(1);
         }
-
-        /* if none match, provide the one that matches quality closest */
-        dec->request_sample_fmt = min_inc != INT_MAX ? inc_fmt : dec_fmt;
+        av_packet_move_ref(&tmp_pkt, pkt);
+        av_fifo_generic_write(ost->muxing_queue, &tmp_pkt, sizeof(tmp_pkt), NULL);
+        return;
     }
-}
-
-static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
-{
-    AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
-    AVCodecContext          *avctx = ost->st->codec;
-    int ret;
 
     /*
      * Audio encoders may split the packets --  #frames in != #packets out.
@@ -315,37 +309,22 @@ static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
      * Counting encoded video frames needs to be done separately because of
      * reordering, see do_video_out()
      */
-    if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
+    if (!(st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && ost->encoding_needed)) {
         if (ost->frame_number >= ost->max_frames) {
-            av_free_packet(pkt);
+            av_packet_unref(pkt);
             return;
         }
         ost->frame_number++;
     }
+    if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
+        uint8_t *sd = av_packet_get_side_data(pkt, AV_PKT_DATA_QUALITY_FACTOR,
+                                              NULL);
+        ost->quality = sd ? *(int *)sd : -1;
 
-    while (bsfc) {
-        AVPacket new_pkt = *pkt;
-        int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
-                                           &new_pkt.data, &new_pkt.size,
-                                           pkt->data, pkt->size,
-                                           pkt->flags & AV_PKT_FLAG_KEY);
-        if (a > 0) {
-            av_free_packet(pkt);
-            new_pkt.buf = av_buffer_create(new_pkt.data, new_pkt.size,
-                                           av_buffer_default_free, NULL, 0);
-            if (!new_pkt.buf)
-                exit_program(1);
-        } else if (a < 0) {
-            av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
-                   bsfc->filter->name, pkt->stream_index,
-                   avctx->codec ? avctx->codec->name : "copy");
-            print_error("", a);
-            if (exit_on_error)
-                exit_program(1);
+        if (ost->frame_rate.num) {
+            pkt->duration = av_rescale_q(1, av_inv_q(ost->frame_rate),
+                                         ost->mux_timebase);
         }
-        *pkt = new_pkt;
-
-        bsfc = bsfc->next;
     }
 
     if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
@@ -371,6 +350,8 @@ static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
     ost->packets_written++;
 
     pkt->stream_index = ost->index;
+    av_packet_rescale_ts(pkt, ost->mux_timebase, ost->st->time_base);
+
     ret = av_interleaved_write_frame(s, pkt);
     if (ret < 0) {
         print_error("av_interleaved_write_frame()", ret);
@@ -378,12 +359,55 @@ static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
     }
 }
 
+static void output_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost)
+{
+    int ret = 0;
+
+    /* apply the output bitstream filters, if any */
+    if (ost->nb_bitstream_filters) {
+        int idx;
+
+        ret = av_bsf_send_packet(ost->bsf_ctx[0], pkt);
+        if (ret < 0)
+            goto finish;
+
+        idx = 1;
+        while (idx) {
+            /* get a packet from the previous filter up the chain */
+            ret = av_bsf_receive_packet(ost->bsf_ctx[idx - 1], pkt);
+            if (ret == AVERROR(EAGAIN)) {
+                ret = 0;
+                idx--;
+                continue;
+            } else if (ret < 0)
+                goto finish;
+
+            /* send it to the next filter down the chain or to the muxer */
+            if (idx < ost->nb_bitstream_filters) {
+                ret = av_bsf_send_packet(ost->bsf_ctx[idx], pkt);
+                if (ret < 0)
+                    goto finish;
+                idx++;
+            } else
+                write_packet(of, pkt, ost);
+        }
+    } else
+        write_packet(of, pkt, ost);
+
+finish:
+    if (ret < 0 && ret != AVERROR_EOF) {
+        av_log(NULL, AV_LOG_FATAL, "Error applying bitstream filters to an output "
+               "packet for stream #%d:%d.\n", ost->file_index, ost->index);
+        exit_program(1);
+    }
+}
+
 static int check_recording_time(OutputStream *ost)
 {
     OutputFile *of = output_files[ost->file_index];
 
     if (of->recording_time != INT64_MAX &&
-        av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
+        av_compare_ts(ost->sync_opts - ost->first_pts, ost->enc_ctx->time_base, of->recording_time,
                       AV_TIME_BASE_Q) >= 0) {
         ost->finished = 1;
         return 0;
@@ -391,12 +415,12 @@ static int check_recording_time(OutputStream *ost)
     return 1;
 }
 
-static void do_audio_out(AVFormatContext *s, OutputStream *ost,
+static void do_audio_out(OutputFile *of, OutputStream *ost,
                          AVFrame *frame)
 {
-    AVCodecContext *enc = ost->st->codec;
+    AVCodecContext *enc = ost->enc_ctx;
     AVPacket pkt;
-    int got_packet = 0;
+    int ret;
 
     av_init_packet(&pkt);
     pkt.data = NULL;
@@ -409,24 +433,27 @@ static void do_audio_out(AVFormatContext *s, OutputStream *ost,
     ost->samples_encoded += frame->nb_samples;
     ost->frames_encoded++;
 
-    if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
-        av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
-        exit_program(1);
-    }
+    ret = avcodec_send_frame(enc, frame);
+    if (ret < 0)
+        goto error;
 
-    if (got_packet) {
-        if (pkt.pts != AV_NOPTS_VALUE)
-            pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
-        if (pkt.dts != AV_NOPTS_VALUE)
-            pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
-        if (pkt.duration > 0)
-            pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
+    while (1) {
+        ret = avcodec_receive_packet(enc, &pkt);
+        if (ret == AVERROR(EAGAIN))
+            break;
+        if (ret < 0)
+            goto error;
 
-        write_frame(s, &pkt, ost);
+        output_packet(of, &pkt, ost);
     }
+
+    return;
+error:
+    av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
+    exit_program(1);
 }
 
-static void do_subtitle_out(AVFormatContext *s,
+static void do_subtitle_out(OutputFile *of,
                             OutputStream *ost,
                             InputStream *ist,
                             AVSubtitle *sub,
@@ -445,7 +472,7 @@ static void do_subtitle_out(AVFormatContext *s,
         return;
     }
 
-    enc = ost->st->codec;
+    enc = ost->enc_ctx;
 
     if (!subtitle_out) {
         subtitle_out = av_malloc(subtitle_out_max_size);
@@ -482,7 +509,7 @@ static void do_subtitle_out(AVFormatContext *s,
         av_init_packet(&pkt);
         pkt.data = subtitle_out;
         pkt.size = subtitle_out_size;
-        pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->st->time_base);
+        pkt.pts  = av_rescale_q(sub->pts, AV_TIME_BASE_Q, ost->mux_timebase);
         if (enc->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
             /* XXX: the pts correction is handled here. Maybe handling
                it in the codec would be better */
@@ -491,31 +518,33 @@ static void do_subtitle_out(AVFormatContext *s,
             else
                 pkt.pts += 90 * sub->end_display_time;
         }
-        write_frame(s, &pkt, ost);
+        output_packet(of, &pkt, ost);
     }
 }
 
-static void do_video_out(AVFormatContext *s,
+static void do_video_out(OutputFile *of,
                          OutputStream *ost,
                          AVFrame *in_picture,
                          int *frame_size)
 {
     int ret, format_video_sync;
     AVPacket pkt;
-    AVCodecContext *enc = ost->st->codec;
+    AVCodecContext *enc = ost->enc_ctx;
 
     *frame_size = 0;
 
     format_video_sync = video_sync_method;
     if (format_video_sync == VSYNC_AUTO)
-        format_video_sync = (s->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
-                            (s->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
+        format_video_sync = (of->ctx->oformat->flags & AVFMT_NOTIMESTAMPS) ? VSYNC_PASSTHROUGH :
+                            (of->ctx->oformat->flags & AVFMT_VARIABLE_FPS) ? VSYNC_VFR : VSYNC_CFR;
     if (format_video_sync != VSYNC_PASSTHROUGH &&
         ost->frame_number &&
         in_picture->pts != AV_NOPTS_VALUE &&
         in_picture->pts < ost->sync_opts) {
         nb_frames_drop++;
-        av_log(NULL, AV_LOG_VERBOSE, "*** drop!\n");
+        av_log(NULL, AV_LOG_WARNING,
+               "*** dropping frame %d from stream %d at ts %"PRId64"\n",
+               ost->frame_number, ost->st->index, in_picture->pts);
         return;
     }
 
@@ -534,71 +563,61 @@ static void do_video_out(AVFormatContext *s,
     if (ost->frame_number >= ost->max_frames)
         return;
 
-    if (s->oformat->flags & AVFMT_RAWPICTURE &&
-        enc->codec->id == AV_CODEC_ID_RAWVIDEO) {
-        /* raw pictures are written as AVPicture structure to
-           avoid any copies. We support temporarily the older
-           method. */
-        enc->coded_frame->interlaced_frame = in_picture->interlaced_frame;
-        enc->coded_frame->top_field_first  = in_picture->top_field_first;
-        pkt.data   = (uint8_t *)in_picture;
-        pkt.size   =  sizeof(AVPicture);
-        pkt.pts    = av_rescale_q(in_picture->pts, enc->time_base, ost->st->time_base);
-        pkt.flags |= AV_PKT_FLAG_KEY;
-
-        write_frame(s, &pkt, ost);
-    } else {
-        int got_packet;
+    if (enc->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) &&
+        ost->top_field_first >= 0)
+        in_picture->top_field_first = !!ost->top_field_first;
 
-        if (ost->st->codec->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME) &&
-            ost->top_field_first >= 0)
-            in_picture->top_field_first = !!ost->top_field_first;
+    in_picture->quality = enc->global_quality;
+    in_picture->pict_type = 0;
+    if (ost->forced_kf_index < ost->forced_kf_count &&
+        in_picture->pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
+        in_picture->pict_type = AV_PICTURE_TYPE_I;
+        ost->forced_kf_index++;
+    }
 
-        in_picture->quality = ost->st->codec->global_quality;
-        if (!enc->me_threshold)
-            in_picture->pict_type = 0;
-        if (ost->forced_kf_index < ost->forced_kf_count &&
-            in_picture->pts >= ost->forced_kf_pts[ost->forced_kf_index]) {
-            in_picture->pict_type = AV_PICTURE_TYPE_I;
-            ost->forced_kf_index++;
-        }
+    ost->frames_encoded++;
 
-        ost->frames_encoded++;
+    ret = avcodec_send_frame(enc, in_picture);
+    if (ret < 0)
+        goto error;
 
-        ret = avcodec_encode_video2(enc, &pkt, in_picture, &got_packet);
-        if (ret < 0) {
-            av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
-            exit_program(1);
-        }
+    /*
+     * For video, there may be reordering, so we can't throw away frames on
+     * encoder flush, we need to limit them here, before they go into encoder.
+     */
+    ost->frame_number++;
 
-        if (got_packet) {
-            if (pkt.pts != AV_NOPTS_VALUE)
-                pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
-            if (pkt.dts != AV_NOPTS_VALUE)
-                pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
+    while (1) {
+        ret = avcodec_receive_packet(enc, &pkt);
+        if (ret == AVERROR(EAGAIN))
+            break;
+        if (ret < 0)
+            goto error;
 
-            write_frame(s, &pkt, ost);
-            *frame_size = pkt.size;
+        output_packet(of, &pkt, ost);
+        *frame_size = pkt.size;
 
-            /* if two pass, output log */
-            if (ost->logfile && enc->stats_out) {
-                fprintf(ost->logfile, "%s", enc->stats_out);
-            }
+        /* if two pass, output log */
+        if (ost->logfile && enc->stats_out) {
+            fprintf(ost->logfile, "%s", enc->stats_out);
         }
+
+        ost->sync_opts++;
     }
-    ost->sync_opts++;
-    /*
-     * For video, number of frames in == number of packets out.
-     * But there may be reordering, so we can't throw away frames on encoder
-     * flush, we need to limit them here, before they go into encoder.
-     */
-    ost->frame_number++;
+
+    return;
+error:
+    av_assert0(ret != AVERROR(EAGAIN) && ret != AVERROR_EOF);
+    av_log(NULL, AV_LOG_FATAL, "Video encoding failed\n");
+    exit_program(1);
 }
 
+#if FF_API_CODED_FRAME && FF_API_ERROR_FRAME
 static double psnr(double d)
 {
     return -10.0 * log(d) / log(10.0);
 }
+#endif
 
 static void do_video_stats(OutputStream *ost, int frame_size)
 {
@@ -615,12 +634,18 @@ static void do_video_stats(OutputStream *ost, int frame_size)
         }
     }
 
-    enc = ost->st->codec;
+    enc = ost->enc_ctx;
     if (enc->codec_type == AVMEDIA_TYPE_VIDEO) {
         frame_number = ost->frame_number;
-        fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality / (float)FF_QP2LAMBDA);
-        if (enc->flags&CODEC_FLAG_PSNR)
+        fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number,
+                ost->quality / (float)FF_QP2LAMBDA);
+
+#if FF_API_CODED_FRAME && FF_API_ERROR_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+        if (enc->flags & AV_CODEC_FLAG_PSNR)
             fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0] / (enc->width * enc->height * 255.0 * 255.0)));
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
 
         fprintf(vstats_file,"f_size= %6d ", frame_size);
         /* compute pts value */
@@ -632,10 +657,16 @@ static void do_video_stats(OutputStream *ost, int frame_size)
         avg_bitrate = (double)(ost->data_size * 8) / ti1 / 1000.0;
         fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
                (double)ost->data_size / 1024, ti1, bitrate, avg_bitrate);
+#if FF_API_CODED_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
         fprintf(vstats_file, "type= %c\n", av_get_picture_type_char(enc->coded_frame->pict_type));
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
     }
 }
 
+static int init_output_stream(OutputStream *ost, char *error, int error_len);
+
 /*
  * Read one frame for lavfi output for ost and encode it.
  */
@@ -650,10 +681,20 @@ static int poll_filter(OutputStream *ost)
     }
     filtered_frame = ost->filtered_frame;
 
+    if (!ost->initialized) {
+        char error[1024];
+        ret = init_output_stream(ost, error, sizeof(error));
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error initializing output stream %d:%d -- %s\n",
+                   ost->file_index, ost->index, error);
+            exit_program(1);
+        }
+    }
+
     if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
-        !(ost->enc->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
+        !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
         ret = av_buffersink_get_samples(ost->filter->filter, filtered_frame,
-                                         ost->st->codec->frame_size);
+                                         ost->enc_ctx->frame_size);
     else
         ret = av_buffersink_get_frame(ost->filter->filter, filtered_frame);
 
@@ -664,23 +705,23 @@ static int poll_filter(OutputStream *ost)
         int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
         filtered_frame->pts = av_rescale_q(filtered_frame->pts,
                                            ost->filter->filter->inputs[0]->time_base,
-                                           ost->st->codec->time_base) -
+                                           ost->enc_ctx->time_base) -
                               av_rescale_q(start_time,
                                            AV_TIME_BASE_Q,
-                                           ost->st->codec->time_base);
+                                           ost->enc_ctx->time_base);
     }
 
     switch (ost->filter->filter->inputs[0]->type) {
     case AVMEDIA_TYPE_VIDEO:
         if (!ost->frame_aspect_ratio)
-            ost->st->codec->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
+            ost->enc_ctx->sample_aspect_ratio = filtered_frame->sample_aspect_ratio;
 
-        do_video_out(of->ctx, ost, filtered_frame, &frame_size);
+        do_video_out(of, ost, filtered_frame, &frame_size);
         if (vstats_filename && frame_size)
             do_video_stats(ost, frame_size);
         break;
     case AVMEDIA_TYPE_AUDIO:
-        do_audio_out(of->ctx, ost, filtered_frame);
+        do_audio_out(of, ost, filtered_frame);
         break;
     default:
         // TODO support subtitle filters
@@ -692,6 +733,19 @@ static int poll_filter(OutputStream *ost)
     return 0;
 }
 
+static void finish_output_stream(OutputStream *ost)
+{
+    OutputFile *of = output_files[ost->file_index];
+    int i;
+
+    ost->finished = 1;
+
+    if (of->shortest) {
+        for (i = 0; i < of->ctx->nb_streams; i++)
+            output_streams[of->ost_index + i]->finished = 1;
+    }
+}
+
 /*
  * Read as many frames from possible from lavfi and encode them.
  *
@@ -702,7 +756,7 @@ static int poll_filter(OutputStream *ost)
  */
 static int poll_filters(void)
 {
-    int i, j, ret = 0;
+    int i, ret = 0;
 
     while (ret >= 0 && !received_sigterm) {
         OutputStream *ost = NULL;
@@ -712,10 +766,20 @@ static int poll_filters(void)
         for (i = 0; i < nb_output_streams; i++) {
             int64_t pts = output_streams[i]->sync_opts;
 
-            if (!output_streams[i]->filter || output_streams[i]->finished)
+            if (output_streams[i]->filter && !output_streams[i]->filter->graph->graph &&
+                !output_streams[i]->filter->graph->nb_inputs) {
+                ret = configure_filtergraph(output_streams[i]->filter->graph);
+                if (ret < 0) {
+                    av_log(NULL, AV_LOG_ERROR, "Error reinitializing filters!\n");
+                    return ret;
+                }
+            }
+
+            if (!output_streams[i]->filter || output_streams[i]->finished ||
+                !output_streams[i]->filter->graph->graph)
                 continue;
 
-            pts = av_rescale_q(pts, output_streams[i]->st->codec->time_base,
+            pts = av_rescale_q(pts, output_streams[i]->enc_ctx->time_base,
                                AV_TIME_BASE_Q);
             if (pts < min_pts) {
                 min_pts = pts;
@@ -729,15 +793,7 @@ static int poll_filters(void)
         ret = poll_filter(ost);
 
         if (ret == AVERROR_EOF) {
-            OutputFile *of = output_files[ost->file_index];
-
-            ost->finished = 1;
-
-            if (of->shortest) {
-                for (j = 0; j < of->ctx->nb_streams; j++)
-                    output_streams[of->ost_index + j]->finished = 1;
-            }
-
+            finish_output_stream(ost);
             ret = 0;
         } else if (ret == AVERROR(EAGAIN))
             return 0;
@@ -755,12 +811,12 @@ static void print_final_stats(int64_t total_size)
 
     for (i = 0; i < nb_output_streams; i++) {
         OutputStream *ost = output_streams[i];
-        switch (ost->st->codec->codec_type) {
+        switch (ost->enc_ctx->codec_type) {
             case AVMEDIA_TYPE_VIDEO: video_size += ost->data_size; break;
             case AVMEDIA_TYPE_AUDIO: audio_size += ost->data_size; break;
             default:                 other_size += ost->data_size; break;
         }
-        extra_size += ost->st->codec->extradata_size;
+        extra_size += ost->enc_ctx->extradata_size;
         data_size  += ost->data_size;
     }
 
@@ -789,7 +845,7 @@ static void print_final_stats(int64_t total_size)
 
         for (j = 0; j < f->nb_streams; j++) {
             InputStream *ist = input_streams[f->ist_index + j];
-            enum AVMediaType type = ist->st->codec->codec_type;
+            enum AVMediaType type = ist->dec_ctx->codec_type;
 
             total_size    += ist->data_size;
             total_packets += ist->nb_packets;
@@ -823,7 +879,7 @@ static void print_final_stats(int64_t total_size)
 
         for (j = 0; j < of->ctx->nb_streams; j++) {
             OutputStream *ost = output_streams[of->ost_index + j];
-            enum AVMediaType type = ost->st->codec->codec_type;
+            enum AVMediaType type = ost->enc_ctx->codec_type;
 
             total_size    += ost->data_size;
             total_packets += ost->packets_written;
@@ -867,7 +923,7 @@ static void print_report(int is_last_report, int64_t timer_start)
     if (!is_last_report) {
         int64_t cur_time;
         /* display the report every 0.5 seconds */
-        cur_time = av_gettime();
+        cur_time = av_gettime_relative();
         if (last_time == -1) {
             last_time = cur_time;
             return;
@@ -897,14 +953,15 @@ static void print_report(int is_last_report, int64_t timer_start)
     for (i = 0; i < nb_output_streams; i++) {
         float q = -1;
         ost = output_streams[i];
-        enc = ost->st->codec;
-        if (!ost->stream_copy && enc->coded_frame)
-            q = enc->coded_frame->quality / (float)FF_QP2LAMBDA;
+        enc = ost->enc_ctx;
+        if (!ost->stream_copy)
+            q = ost->quality / (float) FF_QP2LAMBDA;
+
         if (vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ", q);
         }
         if (!vid && enc->codec_type == AVMEDIA_TYPE_VIDEO) {
-            float t = (av_gettime() - timer_start) / 1000000.0;
+            float t = (av_gettime_relative() - timer_start) / 1000000.0;
 
             frame_number = ost->frame_number;
             snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
@@ -919,7 +976,10 @@ static void print_report(int is_last_report, int64_t timer_start)
                 for (j = 0; j < 32; j++)
                     snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log2(qp_histogram[j] + 1)));
             }
-            if (enc->flags&CODEC_FLAG_PSNR) {
+
+#if FF_API_CODED_FRAME && FF_API_ERROR_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+            if (enc->flags & AV_CODEC_FLAG_PSNR) {
                 int j;
                 double error, error_sum = 0;
                 double scale, scale_sum = 0;
@@ -941,10 +1001,12 @@ static void print_report(int is_last_report, int64_t timer_start)
                 }
                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum / scale_sum));
             }
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
             vid = 1;
         }
         /* compute min output value */
-        pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
+        pts = (double)ost->last_mux_dts * av_q2d(ost->mux_timebase);
         if ((pts < ti1) && (pts > 0))
             ti1 = pts;
     }
@@ -976,61 +1038,54 @@ static void flush_encoders(void)
 
     for (i = 0; i < nb_output_streams; i++) {
         OutputStream   *ost = output_streams[i];
-        AVCodecContext *enc = ost->st->codec;
-        AVFormatContext *os = output_files[ost->file_index]->ctx;
+        AVCodecContext *enc = ost->enc_ctx;
+        OutputFile      *of = output_files[ost->file_index];
         int stop_encoding = 0;
 
         if (!ost->encoding_needed)
             continue;
 
-        if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
+        if (enc->codec_type == AVMEDIA_TYPE_AUDIO && enc->frame_size <= 1)
             continue;
-        if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE) && enc->codec->id == AV_CODEC_ID_RAWVIDEO)
+
+        if (enc->codec_type != AVMEDIA_TYPE_VIDEO && enc->codec_type != AVMEDIA_TYPE_AUDIO)
             continue;
 
+        avcodec_send_frame(enc, NULL);
+
         for (;;) {
-            int (*encode)(AVCodecContext*, AVPacket*, const AVFrame*, int*) = NULL;
-            const char *desc;
+            const char *desc = NULL;
 
-            switch (ost->st->codec->codec_type) {
+            switch (enc->codec_type) {
             case AVMEDIA_TYPE_AUDIO:
-                encode = avcodec_encode_audio2;
                 desc   = "Audio";
                 break;
             case AVMEDIA_TYPE_VIDEO:
-                encode = avcodec_encode_video2;
                 desc   = "Video";
                 break;
             default:
-                stop_encoding = 1;
+                av_assert0(0);
             }
 
-            if (encode) {
+            if (1) {
                 AVPacket pkt;
-                int got_packet;
                 av_init_packet(&pkt);
                 pkt.data = NULL;
                 pkt.size = 0;
 
-                ret = encode(enc, &pkt, NULL, &got_packet);
-                if (ret < 0) {
+                ret = avcodec_receive_packet(enc, &pkt);
+                if (ret < 0 && ret != AVERROR_EOF) {
                     av_log(NULL, AV_LOG_FATAL, "%s encoding failed\n", desc);
                     exit_program(1);
                 }
                 if (ost->logfile && enc->stats_out) {
                     fprintf(ost->logfile, "%s", enc->stats_out);
                 }
-                if (!got_packet) {
+                if (ret == AVERROR_EOF) {
                     stop_encoding = 1;
                     break;
                 }
-                if (pkt.pts != AV_NOPTS_VALUE)
-                    pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
-                if (pkt.dts != AV_NOPTS_VALUE)
-                    pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
-                if (pkt.duration > 0)
-                    pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
-                write_frame(os, &pkt, ost);
+                output_packet(of, &pkt, ost);
             }
 
             if (stop_encoding)
@@ -1061,7 +1116,7 @@ static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *p
     OutputFile *of = output_files[ost->file_index];
     InputFile   *f = input_files [ist->file_index];
     int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
-    int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->st->time_base);
+    int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->mux_timebase);
     AVPacket opkt;
 
     av_init_packet(&opkt);
@@ -1087,30 +1142,30 @@ static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *p
     }
 
     /* force the input stream PTS */
-    if (ost->st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
+    if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_VIDEO)
         ost->sync_opts++;
 
     if (pkt->pts != AV_NOPTS_VALUE)
-        opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base) - ost_tb_start_time;
+        opkt.pts = av_rescale_q(pkt->pts, ist->st->time_base, ost->mux_timebase) - ost_tb_start_time;
     else
         opkt.pts = AV_NOPTS_VALUE;
 
     if (pkt->dts == AV_NOPTS_VALUE)
-        opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->st->time_base);
+        opkt.dts = av_rescale_q(ist->last_dts, AV_TIME_BASE_Q, ost->mux_timebase);
     else
-        opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);
+        opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->mux_timebase);
     opkt.dts -= ost_tb_start_time;
 
-    opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
+    opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->mux_timebase);
     opkt.flags    = pkt->flags;
 
     // FIXME remove the following 2 lines they shall be replaced by the bitstream filters
-    if (  ost->st->codec->codec_id != AV_CODEC_ID_H264
-       && ost->st->codec->codec_id != AV_CODEC_ID_MPEG1VIDEO
-       && ost->st->codec->codec_id != AV_CODEC_ID_MPEG2VIDEO
-       && ost->st->codec->codec_id != AV_CODEC_ID_VC1
+    if (  ost->enc_ctx->codec_id != AV_CODEC_ID_H264
+       && ost->enc_ctx->codec_id != AV_CODEC_ID_MPEG1VIDEO
+       && ost->enc_ctx->codec_id != AV_CODEC_ID_MPEG2VIDEO
+       && ost->enc_ctx->codec_id != AV_CODEC_ID_VC1
        ) {
-        if (av_parser_change(ost->parser, ost->st->codec,
+        if (av_parser_change(ost->parser, ost->parser_avctx,
                              &opkt.data, &opkt.size,
                              pkt->data, pkt->size,
                              pkt->flags & AV_PKT_FLAG_KEY)) {
@@ -1123,13 +1178,139 @@ static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *p
         opkt.size = pkt->size;
     }
 
-    write_frame(of->ctx, &opkt, ost);
-    ost->st->codec->frame_number++;
+    output_packet(of, &opkt, ost);
+}
+
+static int ifilter_send_frame(InputFilter *ifilter, AVFrame *frame)
+{
+    FilterGraph *fg = ifilter->graph;
+    int need_reinit, ret, i;
+
+    /* determine if the parameters for this input changed */
+    need_reinit = ifilter->format != frame->format;
+    if (!!ifilter->hw_frames_ctx != !!frame->hw_frames_ctx ||
+        (ifilter->hw_frames_ctx && ifilter->hw_frames_ctx->data != frame->hw_frames_ctx->data))
+        need_reinit = 1;
+
+    switch (ifilter->ist->st->codecpar->codec_type) {
+    case AVMEDIA_TYPE_AUDIO:
+        need_reinit |= ifilter->sample_rate    != frame->sample_rate ||
+                       ifilter->channel_layout != frame->channel_layout;
+        break;
+    case AVMEDIA_TYPE_VIDEO:
+        need_reinit |= ifilter->width  != frame->width ||
+                       ifilter->height != frame->height;
+        break;
+    }
+
+    if (need_reinit) {
+        ret = ifilter_parameters_from_frame(ifilter, frame);
+        if (ret < 0)
+            return ret;
+    }
+
+    /* (re)init the graph if possible, otherwise buffer the frame and return */
+    if (need_reinit || !fg->graph) {
+        for (i = 0; i < fg->nb_inputs; i++) {
+            if (fg->inputs[i]->format < 0) {
+                AVFrame *tmp = av_frame_clone(frame);
+                if (!tmp)
+                    return AVERROR(ENOMEM);
+                av_frame_unref(frame);
+
+                if (!av_fifo_space(ifilter->frame_queue)) {
+                    ret = av_fifo_realloc2(ifilter->frame_queue, 2 * av_fifo_size(ifilter->frame_queue));
+                    if (ret < 0)
+                        return ret;
+                }
+                av_fifo_generic_write(ifilter->frame_queue, &tmp, sizeof(tmp), NULL);
+                return 0;
+            }
+        }
+
+        ret = poll_filters();
+        if (ret < 0 && ret != AVERROR_EOF) {
+            char errbuf[128];
+            av_strerror(ret, errbuf, sizeof(errbuf));
+
+            av_log(NULL, AV_LOG_ERROR, "Error while filtering: %s\n", errbuf);
+            return ret;
+        }
+
+        ret = configure_filtergraph(fg);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error reinitializing filters!\n");
+            return ret;
+        }
+    }
+
+    ret = av_buffersrc_add_frame(ifilter->filter, frame);
+    if (ret < 0) {
+        av_log(NULL, AV_LOG_ERROR, "Error while filtering\n");
+        return ret;
+    }
+
+    return 0;
+}
+
+static int ifilter_send_eof(InputFilter *ifilter)
+{
+    int i, j, ret;
+
+    ifilter->eof = 1;
+
+    if (ifilter->filter) {
+        ret = av_buffersrc_add_frame(ifilter->filter, NULL);
+        if (ret < 0)
+            return ret;
+    } else {
+        // the filtergraph was never configured
+        FilterGraph *fg = ifilter->graph;
+        for (i = 0; i < fg->nb_inputs; i++)
+            if (!fg->inputs[i]->eof)
+                break;
+        if (i == fg->nb_inputs) {
+            // All the input streams have finished without the filtergraph
+            // ever being configured.
+            // Mark the output streams as finished.
+            for (j = 0; j < fg->nb_outputs; j++)
+                finish_output_stream(fg->outputs[j]->ost);
+        }
+    }
+
+    return 0;
+}
+
+// This does not quite work like avcodec_decode_audio4/avcodec_decode_video2.
+// There is the following difference: if you got a frame, you must call
+// it again with pkt=NULL. pkt==NULL is treated differently from pkt.size==0
+// (pkt==NULL means get more output, pkt.size==0 is a flush/drain packet)
+static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
+{
+    int ret;
+
+    *got_frame = 0;
+
+    if (pkt) {
+        ret = avcodec_send_packet(avctx, pkt);
+        // In particular, we don't expect AVERROR(EAGAIN), because we read all
+        // decoded frames with avcodec_receive_frame() until done.
+        if (ret < 0)
+            return ret == AVERROR_EOF ? 0 : ret;
+    }
+
+    ret = avcodec_receive_frame(avctx, frame);
+    if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
+        return ret;
+    if (ret >= 0)
+        *got_frame = 1;
+
+    return 0;
 }
 
 int guess_input_channel_layout(InputStream *ist)
 {
-    AVCodecContext *dec = ist->st->codec;
+    AVCodecContext *dec = ist->dec_ctx;
 
     if (!dec->channel_layout) {
         char layout_name[256];
@@ -1139,7 +1320,7 @@ int guess_input_channel_layout(InputStream *ist)
             return 0;
         av_get_channel_layout_string(layout_name, sizeof(layout_name),
                                      dec->channels, dec->channel_layout);
-        av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for  Input Stream "
+        av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for Input Stream "
                "#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
     }
     return 1;
@@ -1148,8 +1329,8 @@ int guess_input_channel_layout(InputStream *ist)
 static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
 {
     AVFrame *decoded_frame, *f;
-    AVCodecContext *avctx = ist->st->codec;
-    int i, ret, err = 0, resample_changed;
+    AVCodecContext *avctx = ist->dec_ctx;
+    int i, ret, err = 0;
 
     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
         return AVERROR(ENOMEM);
@@ -1157,14 +1338,9 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
         return AVERROR(ENOMEM);
     decoded_frame = ist->decoded_frame;
 
-    ret = avcodec_decode_audio4(avctx, decoded_frame, got_output, pkt);
-    if (!*got_output || ret < 0) {
-        if (!pkt->size) {
-            for (i = 0; i < ist->nb_filters; i++)
-                av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
-        }
+    ret = decode(avctx, decoded_frame, got_output, pkt);
+    if (!*got_output || ret < 0)
         return ret;
-    }
 
     ist->samples_decoded += decoded_frame->nb_samples;
     ist->frames_decoded++;
@@ -1173,56 +1349,15 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
        the decoder could be delaying output by a packet or more. */
     if (decoded_frame->pts != AV_NOPTS_VALUE)
         ist->next_dts = decoded_frame->pts;
-    else if (pkt->pts != AV_NOPTS_VALUE) {
+    else if (pkt && pkt->pts != AV_NOPTS_VALUE) {
         decoded_frame->pts = pkt->pts;
-        pkt->pts           = AV_NOPTS_VALUE;
-    }
-
-    resample_changed = ist->resample_sample_fmt     != decoded_frame->format         ||
-                       ist->resample_channels       != avctx->channels               ||
-                       ist->resample_channel_layout != decoded_frame->channel_layout ||
-                       ist->resample_sample_rate    != decoded_frame->sample_rate;
-    if (resample_changed) {
-        char layout1[64], layout2[64];
-
-        if (!guess_input_channel_layout(ist)) {
-            av_log(NULL, AV_LOG_FATAL, "Unable to find default channel "
-                   "layout for Input Stream #%d.%d\n", ist->file_index,
-                   ist->st->index);
-            exit_program(1);
-        }
-        decoded_frame->channel_layout = avctx->channel_layout;
-
-        av_get_channel_layout_string(layout1, sizeof(layout1), ist->resample_channels,
-                                     ist->resample_channel_layout);
-        av_get_channel_layout_string(layout2, sizeof(layout2), avctx->channels,
-                                     decoded_frame->channel_layout);
-
-        av_log(NULL, AV_LOG_INFO,
-               "Input stream #%d:%d frame changed from rate:%d fmt:%s ch:%d chl:%s to rate:%d fmt:%s ch:%d chl:%s\n",
-               ist->file_index, ist->st->index,
-               ist->resample_sample_rate,  av_get_sample_fmt_name(ist->resample_sample_fmt),
-               ist->resample_channels, layout1,
-               decoded_frame->sample_rate, av_get_sample_fmt_name(decoded_frame->format),
-               avctx->channels, layout2);
-
-        ist->resample_sample_fmt     = decoded_frame->format;
-        ist->resample_sample_rate    = decoded_frame->sample_rate;
-        ist->resample_channel_layout = decoded_frame->channel_layout;
-        ist->resample_channels       = avctx->channels;
-
-        for (i = 0; i < nb_filtergraphs; i++)
-            if (ist_in_filtergraph(filtergraphs[i], ist) &&
-                configure_filtergraph(filtergraphs[i]) < 0) {
-                av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
-                exit_program(1);
-            }
     }
 
     if (decoded_frame->pts != AV_NOPTS_VALUE)
         decoded_frame->pts = av_rescale_q(decoded_frame->pts,
                                           ist->st->time_base,
-                                          (AVRational){1, ist->st->codec->sample_rate});
+                                          (AVRational){1, avctx->sample_rate});
+    ist->nb_samples = decoded_frame->nb_samples;
     for (i = 0; i < ist->nb_filters; i++) {
         if (i < ist->nb_filters - 1) {
             f = ist->filter_frame;
@@ -1232,7 +1367,7 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
         } else
             f = decoded_frame;
 
-        err = av_buffersrc_add_frame(ist->filters[i]->filter, f);
+        err = ifilter_send_frame(ist->filters[i], f);
         if (err < 0)
             break;
     }
@@ -1245,7 +1380,7 @@ static int decode_audio(InputStream *ist, AVPacket *pkt, int *got_output)
 static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
 {
     AVFrame *decoded_frame, *f;
-    int i, ret = 0, err = 0, resample_changed;
+    int i, ret = 0, err = 0;
 
     if (!ist->decoded_frame && !(ist->decoded_frame = av_frame_alloc()))
         return AVERROR(ENOMEM);
@@ -1253,58 +1388,27 @@ static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
         return AVERROR(ENOMEM);
     decoded_frame = ist->decoded_frame;
 
-    ret = avcodec_decode_video2(ist->st->codec,
-                                decoded_frame, got_output, pkt);
-    if (!*got_output || ret < 0) {
-        if (!pkt->size) {
-            for (i = 0; i < ist->nb_filters; i++)
-                av_buffersrc_add_frame(ist->filters[i]->filter, NULL);
-        }
+    ret = decode(ist->dec_ctx, decoded_frame, got_output, pkt);
+    if (!*got_output || ret < 0)
         return ret;
-    }
 
     ist->frames_decoded++;
 
     if (ist->hwaccel_retrieve_data && decoded_frame->format == ist->hwaccel_pix_fmt) {
-        err = ist->hwaccel_retrieve_data(ist->st->codec, decoded_frame);
+        err = ist->hwaccel_retrieve_data(ist->dec_ctx, decoded_frame);
         if (err < 0)
             goto fail;
     }
     ist->hwaccel_retrieved_pix_fmt = decoded_frame->format;
 
-    decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pkt_pts,
+    decoded_frame->pts = guess_correct_pts(&ist->pts_ctx, decoded_frame->pts,
                                            decoded_frame->pkt_dts);
-    pkt->size = 0;
+    if (ist->framerate.num)
+        decoded_frame->pts = ist->cfr_next_pts++;
 
     if (ist->st->sample_aspect_ratio.num)
         decoded_frame->sample_aspect_ratio = ist->st->sample_aspect_ratio;
 
-    resample_changed = ist->resample_width   != decoded_frame->width  ||
-                       ist->resample_height  != decoded_frame->height ||
-                       ist->resample_pix_fmt != decoded_frame->format;
-    if (resample_changed) {
-        av_log(NULL, AV_LOG_INFO,
-               "Input stream #%d:%d frame changed from size:%dx%d fmt:%s to size:%dx%d fmt:%s\n",
-               ist->file_index, ist->st->index,
-               ist->resample_width,  ist->resample_height,  av_get_pix_fmt_name(ist->resample_pix_fmt),
-               decoded_frame->width, decoded_frame->height, av_get_pix_fmt_name(decoded_frame->format));
-
-        ret = poll_filters();
-        if (ret < 0 && (ret != AVERROR_EOF && ret != AVERROR(EAGAIN)))
-            av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
-
-        ist->resample_width   = decoded_frame->width;
-        ist->resample_height  = decoded_frame->height;
-        ist->resample_pix_fmt = decoded_frame->format;
-
-        for (i = 0; i < nb_filtergraphs; i++)
-            if (ist_in_filtergraph(filtergraphs[i], ist) &&
-                configure_filtergraph(filtergraphs[i]) < 0) {
-                av_log(NULL, AV_LOG_FATAL, "Error reinitializing filters!\n");
-                exit_program(1);
-            }
-    }
-
     for (i = 0; i < ist->nb_filters; i++) {
         if (i < ist->nb_filters - 1) {
             f = ist->filter_frame;
@@ -1314,7 +1418,7 @@ static int decode_video(InputStream *ist, AVPacket *pkt, int *got_output)
         } else
             f = decoded_frame;
 
-        err = av_buffersrc_add_frame(ist->filters[i]->filter, f);
+        err = ifilter_send_frame(ist->filters[i], f);
         if (err < 0)
             break;
     }
@@ -1328,7 +1432,7 @@ fail:
 static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
 {
     AVSubtitle subtitle;
-    int i, ret = avcodec_decode_subtitle2(ist->st->codec,
+    int i, ret = avcodec_decode_subtitle2(ist->dec_ctx,
                                           &subtitle, got_output, pkt);
     if (ret < 0)
         return ret;
@@ -1343,99 +1447,120 @@ static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output)
         if (!check_output_constraints(ist, ost) || !ost->encoding_needed)
             continue;
 
-        do_subtitle_out(output_files[ost->file_index]->ctx, ost, ist, &subtitle, pkt->pts);
+        do_subtitle_out(output_files[ost->file_index], ost, ist, &subtitle, pkt->pts);
     }
 
     avsubtitle_free(&subtitle);
     return ret;
 }
 
+static int send_filter_eof(InputStream *ist)
+{
+    int i, ret;
+    for (i = 0; i < ist->nb_filters; i++) {
+        ret = ifilter_send_eof(ist->filters[i]);
+        if (ret < 0)
+            return ret;
+    }
+    return 0;
+}
+
 /* pkt = NULL means EOF (needed to flush decoder buffers) */
-static int output_packet(InputStream *ist, const AVPacket *pkt)
+static void process_input_packet(InputStream *ist, const AVPacket *pkt, int no_eof)
 {
     int i;
-    int got_output;
+    int repeating = 0;
     AVPacket avpkt;
 
     if (ist->next_dts == AV_NOPTS_VALUE)
         ist->next_dts = ist->last_dts;
 
-    if (pkt == NULL) {
+    if (!pkt) {
         /* EOF handling */
         av_init_packet(&avpkt);
         avpkt.data = NULL;
         avpkt.size = 0;
-        goto handle_eof;
     } else {
         avpkt = *pkt;
     }
 
-    if (pkt->dts != AV_NOPTS_VALUE)
+    if (pkt && pkt->dts != AV_NOPTS_VALUE)
         ist->next_dts = ist->last_dts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
 
     // while we have more to decode or while the decoder did output something on EOF
-    while (ist->decoding_needed && (avpkt.size > 0 || (!pkt && got_output))) {
+    while (ist->decoding_needed && (!pkt || avpkt.size > 0)) {
         int ret = 0;
-    handle_eof:
-
-        ist->last_dts = ist->next_dts;
+        int got_output = 0;
 
-        if (avpkt.size && avpkt.size != pkt->size) {
-            av_log(NULL, ist->showed_multi_packet_warning ? AV_LOG_VERBOSE : AV_LOG_WARNING,
-                   "Multiple frames in a packet from stream %d\n", pkt->stream_index);
-            ist->showed_multi_packet_warning = 1;
-        }
+        if (!repeating)
+            ist->last_dts = ist->next_dts;
 
-        switch (ist->st->codec->codec_type) {
+        switch (ist->dec_ctx->codec_type) {
         case AVMEDIA_TYPE_AUDIO:
-            ret = decode_audio    (ist, &avpkt, &got_output);
+            ret = decode_audio    (ist, repeating ? NULL : &avpkt, &got_output);
             break;
         case AVMEDIA_TYPE_VIDEO:
-            ret = decode_video    (ist, &avpkt, &got_output);
-            if (avpkt.duration)
-                ist->next_dts += av_rescale_q(avpkt.duration, ist->st->time_base, AV_TIME_BASE_Q);
+            ret = decode_video    (ist, repeating ? NULL : &avpkt, &got_output);
+            if (repeating && !got_output)
+                ;
+            else if (pkt && pkt->duration)
+                ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
             else if (ist->st->avg_frame_rate.num)
                 ist->next_dts += av_rescale_q(1, av_inv_q(ist->st->avg_frame_rate),
                                               AV_TIME_BASE_Q);
-            else if (ist->st->codec->time_base.num != 0) {
+            else if (ist->dec_ctx->framerate.num != 0) {
                 int ticks      = ist->st->parser ? ist->st->parser->repeat_pict + 1 :
-                                                   ist->st->codec->ticks_per_frame;
-                ist->next_dts += av_rescale_q(ticks, ist->st->codec->time_base, AV_TIME_BASE_Q);
+                                                   ist->dec_ctx->ticks_per_frame;
+                ist->next_dts += av_rescale_q(ticks, ist->dec_ctx->framerate, AV_TIME_BASE_Q);
             }
             break;
         case AVMEDIA_TYPE_SUBTITLE:
+            if (repeating)
+                break;
             ret = transcode_subtitles(ist, &avpkt, &got_output);
             break;
         default:
-            return -1;
+            return;
         }
 
-        if (ret < 0)
-            return ret;
-        // touch data and size only if not EOF
-        if (pkt) {
-            avpkt.data += ret;
-            avpkt.size -= ret;
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
+                   ist->file_index, ist->st->index);
+            if (exit_on_error)
+                exit_program(1);
+            break;
         }
-        if (!got_output) {
-            continue;
+
+        if (!got_output)
+            break;
+
+        repeating = 1;
+    }
+
+    /* after flushing, send an EOF on all the filter inputs attached to the stream */
+    /* except when looping we need to flush but not to send an EOF */
+    if (!pkt && ist->decoding_needed && !no_eof) {
+        int ret = send_filter_eof(ist);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_FATAL, "Error marking filters as finished\n");
+            exit_program(1);
         }
     }
 
     /* handle stream copy */
     if (!ist->decoding_needed) {
         ist->last_dts = ist->next_dts;
-        switch (ist->st->codec->codec_type) {
+        switch (ist->dec_ctx->codec_type) {
         case AVMEDIA_TYPE_AUDIO:
-            ist->next_dts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
-                             ist->st->codec->sample_rate;
+            ist->next_dts += ((int64_t)AV_TIME_BASE * ist->dec_ctx->frame_size) /
+                             ist->dec_ctx->sample_rate;
             break;
         case AVMEDIA_TYPE_VIDEO:
-            if (ist->st->codec->time_base.num != 0) {
-                int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->st->codec->ticks_per_frame;
+            if (ist->dec_ctx->framerate.num != 0) {
+                int ticks = ist->st->parser ? ist->st->parser->repeat_pict + 1 : ist->dec_ctx->ticks_per_frame;
                 ist->next_dts += ((int64_t)AV_TIME_BASE *
-                                  ist->st->codec->time_base.num * ticks) /
-                                  ist->st->codec->time_base.den;
+                                  ist->dec_ctx->framerate.den * ticks) /
+                                  ist->dec_ctx->framerate.num;
             }
             break;
         }
@@ -1449,15 +1574,21 @@ static int output_packet(InputStream *ist, const AVPacket *pkt)
         do_streamcopy(ist, ost, pkt);
     }
 
-    return 0;
+    return;
 }
 
 static void print_sdp(void)
 {
     char sdp[16384];
     int i;
-    AVFormatContext **avc = av_malloc(sizeof(*avc) * nb_output_files);
+    AVFormatContext **avc;
+
+    for (i = 0; i < nb_output_files; i++) {
+        if (!output_files[i]->header_written)
+            return;
+    }
 
+    avc = av_malloc(sizeof(*avc) * nb_output_files);
     if (!avc)
         exit_program(1);
     for (i = 0; i < nb_output_files; i++)
@@ -1504,10 +1635,17 @@ static enum AVPixelFormat get_format(AVCodecContext *s, const enum AVPixelFormat
                        "%s hwaccel requested for input stream #%d:%d, "
                        "but cannot be initialized.\n", hwaccel->name,
                        ist->file_index, ist->st->index);
-                exit_program(1);
+                return AV_PIX_FMT_NONE;
             }
             continue;
         }
+
+        if (ist->hw_frames_ctx) {
+            s->hw_frames_ctx = av_buffer_ref(ist->hw_frames_ctx);
+            if (!s->hw_frames_ctx)
+                return AV_PIX_FMT_NONE;
+        }
+
         ist->active_hwaccel_id = hwaccel->id;
         ist->hwaccel_pix_fmt   = *p;
         break;
@@ -1528,36 +1666,27 @@ static int get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
 
 static int init_input_stream(int ist_index, char *error, int error_len)
 {
-    int i, ret;
+    int ret;
     InputStream *ist = input_streams[ist_index];
+
     if (ist->decoding_needed) {
         AVCodec *codec = ist->dec;
         if (!codec) {
             snprintf(error, error_len, "Decoder (codec id %d) not found for input stream #%d:%d",
-                    ist->st->codec->codec_id, ist->file_index, ist->st->index);
+                    ist->dec_ctx->codec_id, ist->file_index, ist->st->index);
             return AVERROR(EINVAL);
         }
 
-        /* update requested sample format for the decoder based on the
-           corresponding encoder sample format */
-        for (i = 0; i < nb_output_streams; i++) {
-            OutputStream *ost = output_streams[i];
-            if (ost->source_index == ist_index) {
-                update_sample_fmt(ist->st->codec, codec, ost->st->codec);
-                break;
-            }
-        }
+        ist->dec_ctx->opaque                = ist;
+        ist->dec_ctx->get_format            = get_format;
+        ist->dec_ctx->get_buffer2           = get_buffer;
+        ist->dec_ctx->thread_safe_callbacks = 1;
 
-        ist->st->codec->opaque      = ist;
-        ist->st->codec->get_format  = get_format;
-        ist->st->codec->get_buffer2 = get_buffer;
-        ist->st->codec->thread_safe_callbacks = 1;
+        av_opt_set_int(ist->dec_ctx, "refcounted_frames", 1, 0);
 
-        av_opt_set_int(ist->st->codec, "refcounted_frames", 1, 0);
-
-        if (!av_dict_get(ist->opts, "threads", NULL, 0))
-            av_dict_set(&ist->opts, "threads", "auto", 0);
-        if ((ret = avcodec_open2(ist->st->codec, codec, &ist->opts)) < 0) {
+        if (!av_dict_get(ist->decoder_opts, "threads", NULL, 0))
+            av_dict_set(&ist->decoder_opts, "threads", "auto", 0);
+        if ((ret = avcodec_open2(ist->dec_ctx, codec, &ist->decoder_opts)) < 0) {
             char errbuf[128];
             if (ret == AVERROR_EXPERIMENTAL)
                 abort_codec_experimental(codec, 0);
@@ -1570,10 +1699,10 @@ static int init_input_stream(int ist_index, char *error, int error_len)
                      ist->file_index, ist->st->index, errbuf);
             return ret;
         }
-        assert_avoptions(ist->opts);
+        assert_avoptions(ist->decoder_opts);
     }
 
-    ist->last_dts = ist->st->avg_frame_rate.num ? - ist->st->codec->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
+    ist->last_dts = ist->st->avg_frame_rate.num ? - ist->dec_ctx->has_b_frames * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
     ist->next_dts = AV_NOPTS_VALUE;
     init_pts_correction(&ist->pts_ctx);
 
@@ -1590,26 +1719,211 @@ static InputStream *get_input_stream(OutputStream *ost)
         int i;
 
         for (i = 0; i < fg->nb_inputs; i++)
-            if (fg->inputs[i]->ist->st->codec->codec_type == ost->st->codec->codec_type)
+            if (fg->inputs[i]->ist->dec_ctx->codec_type == ost->enc_ctx->codec_type)
                 return fg->inputs[i]->ist;
     }
 
     return NULL;
 }
 
-static void parse_forced_key_frames(char *kf, OutputStream *ost,
-                                    AVCodecContext *avctx)
+/* open the muxer when all the streams are initialized */
+static int check_init_output_file(OutputFile *of, int file_index)
 {
-    char *p;
-    int n = 1, i;
-    int64_t t;
+    int ret, i;
 
-    for (p = kf; *p; p++)
-        if (*p == ',')
-            n++;
-    ost->forced_kf_count = n;
-    ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
-    if (!ost->forced_kf_pts) {
+    for (i = 0; i < of->ctx->nb_streams; i++) {
+        OutputStream *ost = output_streams[of->ost_index + i];
+        if (!ost->initialized)
+            return 0;
+    }
+
+    of->ctx->interrupt_callback = int_cb;
+
+    ret = avformat_write_header(of->ctx, &of->opts);
+    if (ret < 0) {
+        char errbuf[128];
+
+        av_strerror(ret, errbuf, sizeof(errbuf));
+
+        av_log(NULL, AV_LOG_ERROR,
+               "Could not write header for output file #%d "
+               "(incorrect codec parameters ?): %s",
+               file_index, errbuf);
+        return ret;
+    }
+    assert_avoptions(of->opts);
+    of->header_written = 1;
+
+    av_dump_format(of->ctx, file_index, of->ctx->filename, 1);
+
+    if (want_sdp)
+        print_sdp();
+
+    /* flush the muxing queues */
+    for (i = 0; i < of->ctx->nb_streams; i++) {
+        OutputStream *ost = output_streams[of->ost_index + i];
+
+        while (av_fifo_size(ost->muxing_queue)) {
+            AVPacket pkt;
+            av_fifo_generic_read(ost->muxing_queue, &pkt, sizeof(pkt), NULL);
+            write_packet(of, &pkt, ost);
+        }
+    }
+
+    return 0;
+}
+
+static int init_output_bsfs(OutputStream *ost)
+{
+    AVBSFContext *ctx;
+    int i, ret;
+
+    if (!ost->nb_bitstream_filters)
+        return 0;
+
+    ost->bsf_ctx = av_mallocz_array(ost->nb_bitstream_filters, sizeof(*ost->bsf_ctx));
+    if (!ost->bsf_ctx)
+        return AVERROR(ENOMEM);
+
+    for (i = 0; i < ost->nb_bitstream_filters; i++) {
+        ret = av_bsf_alloc(ost->bitstream_filters[i], &ctx);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error allocating a bitstream filter context\n");
+            return ret;
+        }
+        ost->bsf_ctx[i] = ctx;
+
+        ret = avcodec_parameters_copy(ctx->par_in,
+                                      i ? ost->bsf_ctx[i - 1]->par_out : ost->st->codecpar);
+        if (ret < 0)
+            return ret;
+
+        ctx->time_base_in = i ? ost->bsf_ctx[i - 1]->time_base_out : ost->st->time_base;
+
+        ret = av_bsf_init(ctx);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_ERROR, "Error initializing bitstream filter: %s\n",
+                   ost->bitstream_filters[i]->name);
+            return ret;
+        }
+    }
+
+    ctx = ost->bsf_ctx[ost->nb_bitstream_filters - 1];
+    ret = avcodec_parameters_copy(ost->st->codecpar, ctx->par_out);
+    if (ret < 0)
+        return ret;
+
+    ost->st->time_base = ctx->time_base_out;
+
+    return 0;
+}
+
+static int init_output_stream_streamcopy(OutputStream *ost)
+{
+    OutputFile *of = output_files[ost->file_index];
+    InputStream *ist = get_input_stream(ost);
+    AVCodecParameters *par_dst = ost->st->codecpar;
+    AVCodecParameters *par_src = ist->st->codecpar;
+    AVRational sar;
+    uint32_t codec_tag = par_dst->codec_tag;
+    int i, ret;
+
+    if (!codec_tag) {
+        if (!of->ctx->oformat->codec_tag ||
+             av_codec_get_id (of->ctx->oformat->codec_tag, par_src->codec_tag) == par_src->codec_id ||
+             av_codec_get_tag(of->ctx->oformat->codec_tag, par_src->codec_id) <= 0)
+            codec_tag = par_src->codec_tag;
+    }
+
+    ret = avcodec_parameters_copy(par_dst, par_src);
+    if (ret < 0)
+        return ret;
+
+    par_dst->codec_tag = codec_tag;
+
+    ost->st->disposition = ist->st->disposition;
+
+    ost->st->time_base = ist->st->time_base;
+
+    if (ist->st->nb_side_data) {
+        ost->st->side_data = av_realloc_array(NULL, ist->st->nb_side_data,
+                                              sizeof(*ist->st->side_data));
+        if (!ost->st->side_data)
+            return AVERROR(ENOMEM);
+
+        for (i = 0; i < ist->st->nb_side_data; i++) {
+            const AVPacketSideData *sd_src = &ist->st->side_data[i];
+            AVPacketSideData *sd_dst = &ost->st->side_data[i];
+
+            sd_dst->data = av_malloc(sd_src->size);
+            if (!sd_dst->data)
+                return AVERROR(ENOMEM);
+            memcpy(sd_dst->data, sd_src->data, sd_src->size);
+            sd_dst->size = sd_src->size;
+            sd_dst->type = sd_src->type;
+            ost->st->nb_side_data++;
+        }
+    }
+
+    ost->parser = av_parser_init(par_dst->codec_id);
+    ost->parser_avctx = avcodec_alloc_context3(NULL);
+    if (!ost->parser_avctx)
+        return AVERROR(ENOMEM);
+
+    if (par_dst->codec_type == AVMEDIA_TYPE_VIDEO) {
+        if (ost->frame_aspect_ratio)
+            sar = av_d2q(ost->frame_aspect_ratio * par_dst->height / par_dst->width, 255);
+        else if (ist->st->sample_aspect_ratio.num)
+            sar = ist->st->sample_aspect_ratio;
+        else
+            sar = par_src->sample_aspect_ratio;
+        ost->st->sample_aspect_ratio = par_dst->sample_aspect_ratio = sar;
+    }
+
+    return 0;
+}
+
+static void set_encoder_id(OutputFile *of, OutputStream *ost)
+{
+    AVDictionaryEntry *e;
+
+    uint8_t *encoder_string;
+    int encoder_string_len;
+    int format_flags = 0;
+
+    e = av_dict_get(of->opts, "fflags", NULL, 0);
+    if (e) {
+        const AVOption *o = av_opt_find(of->ctx, "fflags", NULL, 0, 0);
+        if (!o)
+            return;
+        av_opt_eval_flags(of->ctx, o, e->value, &format_flags);
+    }
+
+    encoder_string_len = sizeof(LIBAVCODEC_IDENT) + strlen(ost->enc->name) + 2;
+    encoder_string     = av_mallocz(encoder_string_len);
+    if (!encoder_string)
+        exit_program(1);
+
+    if (!(format_flags & AVFMT_FLAG_BITEXACT))
+        av_strlcpy(encoder_string, LIBAVCODEC_IDENT " ", encoder_string_len);
+    av_strlcat(encoder_string, ost->enc->name, encoder_string_len);
+    av_dict_set(&ost->st->metadata, "encoder",  encoder_string,
+                AV_DICT_DONT_STRDUP_VAL | AV_DICT_DONT_OVERWRITE);
+}
+
+static void parse_forced_key_frames(char *kf, OutputStream *ost,
+                                    AVCodecContext *avctx)
+{
+    char *p;
+    int n = 1, i;
+    int64_t t;
+
+    for (p = kf; *p; p++)
+        if (*p == ',')
+            n++;
+    ost->forced_kf_count = n;
+    ost->forced_kf_pts   = av_malloc(sizeof(*ost->forced_kf_pts) * n);
+    if (!ost->forced_kf_pts) {
         av_log(NULL, AV_LOG_FATAL, "Could not allocate forced key frames array.\n");
         exit_program(1);
     }
@@ -1628,305 +1942,186 @@ static void parse_forced_key_frames(char *kf, OutputStream *ost,
     }
 }
 
-static int transcode_init(void)
+static int init_output_stream_encode(OutputStream *ost)
 {
-    int ret = 0, i, j, k;
-    AVFormatContext *oc;
-    AVCodecContext *codec;
-    OutputStream *ost;
-    InputStream *ist;
-    char error[1024];
-    int want_sdp = 1;
+    InputStream *ist = get_input_stream(ost);
+    AVCodecContext *enc_ctx = ost->enc_ctx;
+    AVCodecContext *dec_ctx = NULL;
 
-    /* init framerate emulation */
-    for (i = 0; i < nb_input_files; i++) {
-        InputFile *ifile = input_files[i];
-        if (ifile->rate_emu)
-            for (j = 0; j < ifile->nb_streams; j++)
-                input_streams[j + ifile->ist_index]->start = av_gettime();
+    set_encoder_id(output_files[ost->file_index], ost);
+
+    if (ist) {
+        ost->st->disposition = ist->st->disposition;
+
+        dec_ctx = ist->dec_ctx;
+
+        enc_ctx->bits_per_raw_sample    = dec_ctx->bits_per_raw_sample;
+        enc_ctx->chroma_sample_location = dec_ctx->chroma_sample_location;
     }
 
-    /* output stream init */
-    for (i = 0; i < nb_output_files; i++) {
-        oc = output_files[i]->ctx;
-        if (!oc->nb_streams && !(oc->oformat->flags & AVFMT_NOSTREAMS)) {
-            av_dump_format(oc, i, oc->filename, 1);
-            av_log(NULL, AV_LOG_ERROR, "Output file #%d does not contain any stream\n", i);
-            return AVERROR(EINVAL);
+    switch (enc_ctx->codec_type) {
+    case AVMEDIA_TYPE_AUDIO:
+        enc_ctx->sample_fmt     = ost->filter->filter->inputs[0]->format;
+        enc_ctx->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
+        enc_ctx->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
+        enc_ctx->channels       = av_get_channel_layout_nb_channels(enc_ctx->channel_layout);
+        enc_ctx->time_base      = (AVRational){ 1, enc_ctx->sample_rate };
+        break;
+    case AVMEDIA_TYPE_VIDEO:
+        enc_ctx->time_base = ost->filter->filter->inputs[0]->time_base;
+
+        enc_ctx->width  = ost->filter->filter->inputs[0]->w;
+        enc_ctx->height = ost->filter->filter->inputs[0]->h;
+        enc_ctx->sample_aspect_ratio = ost->st->sample_aspect_ratio =
+            ost->frame_aspect_ratio ? // overridden by the -aspect cli option
+            av_d2q(ost->frame_aspect_ratio * enc_ctx->height/enc_ctx->width, 255) :
+            ost->filter->filter->inputs[0]->sample_aspect_ratio;
+        enc_ctx->pix_fmt = ost->filter->filter->inputs[0]->format;
+
+        ost->st->avg_frame_rate = ost->frame_rate;
+
+        if (dec_ctx &&
+            (enc_ctx->width   != dec_ctx->width  ||
+             enc_ctx->height  != dec_ctx->height ||
+             enc_ctx->pix_fmt != dec_ctx->pix_fmt)) {
+            enc_ctx->bits_per_raw_sample = 0;
         }
-    }
 
-    /* init complex filtergraphs */
-    for (i = 0; i < nb_filtergraphs; i++)
-        if ((ret = avfilter_graph_config(filtergraphs[i]->graph, NULL)) < 0)
-            return ret;
+        if (ost->forced_keyframes)
+            parse_forced_key_frames(ost->forced_keyframes, ost,
+                                    ost->enc_ctx);
+        break;
+    case AVMEDIA_TYPE_SUBTITLE:
+        enc_ctx->time_base = (AVRational){1, 1000};
+        break;
+    default:
+        abort();
+        break;
+    }
 
-    /* for each output stream, we compute the right encoding parameters */
-    for (i = 0; i < nb_output_streams; i++) {
-        AVCodecContext *icodec = NULL;
-        ost = output_streams[i];
-        oc  = output_files[ost->file_index]->ctx;
-        ist = get_input_stream(ost);
+    return 0;
+}
 
-        if (ost->attachment_filename)
-            continue;
+static int init_output_stream(OutputStream *ost, char *error, int error_len)
+{
+    int ret = 0;
 
-        codec  = ost->st->codec;
+    if (ost->encoding_needed) {
+        AVCodec      *codec = ost->enc;
+        AVCodecContext *dec = NULL;
+        InputStream *ist;
 
-        if (ist) {
-            icodec = ist->st->codec;
+        ret = init_output_stream_encode(ost);
+        if (ret < 0)
+            return ret;
 
-            ost->st->disposition          = ist->st->disposition;
-            codec->bits_per_raw_sample    = icodec->bits_per_raw_sample;
-            codec->chroma_sample_location = icodec->chroma_sample_location;
+        if ((ist = get_input_stream(ost)))
+            dec = ist->dec_ctx;
+        if (dec && dec->subtitle_header) {
+            ost->enc_ctx->subtitle_header = av_malloc(dec->subtitle_header_size);
+            if (!ost->enc_ctx->subtitle_header)
+                return AVERROR(ENOMEM);
+            memcpy(ost->enc_ctx->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
+            ost->enc_ctx->subtitle_header_size = dec->subtitle_header_size;
         }
+        if (!av_dict_get(ost->encoder_opts, "threads", NULL, 0))
+            av_dict_set(&ost->encoder_opts, "threads", "auto", 0);
 
-        if (ost->stream_copy) {
-            AVRational sar;
-            uint64_t extra_size;
+        if (ost->filter && ost->filter->filter->inputs[0]->hw_frames_ctx) {
+            ost->enc_ctx->hw_frames_ctx = av_buffer_ref(ost->filter->filter->inputs[0]->hw_frames_ctx);
+            if (!ost->enc_ctx->hw_frames_ctx)
+                return AVERROR(ENOMEM);
+        }
 
-            av_assert0(ist && !ost->filter);
+        if ((ret = avcodec_open2(ost->enc_ctx, codec, &ost->encoder_opts)) < 0) {
+            if (ret == AVERROR_EXPERIMENTAL)
+                abort_codec_experimental(codec, 1);
+            snprintf(error, error_len,
+                     "Error while opening encoder for output stream #%d:%d - "
+                     "maybe incorrect parameters such as bit_rate, rate, width or height",
+                    ost->file_index, ost->index);
+            return ret;
+        }
+        assert_avoptions(ost->encoder_opts);
+        if (ost->enc_ctx->bit_rate && ost->enc_ctx->bit_rate < 1000)
+            av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
+                                         "It takes bits/s as argument, not kbits/s\n");
 
-            extra_size = (uint64_t)icodec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE;
+        ret = avcodec_parameters_from_context(ost->st->codecpar, ost->enc_ctx);
+        if (ret < 0) {
+            av_log(NULL, AV_LOG_FATAL,
+                   "Error initializing the output stream codec context.\n");
+            exit_program(1);
+        }
 
-            if (extra_size > INT_MAX) {
-                return AVERROR(EINVAL);
-            }
+        if (ost->enc_ctx->nb_coded_side_data) {
+            int i;
 
-            /* if stream_copy is selected, no need to decode or encode */
-            codec->codec_id   = icodec->codec_id;
-            codec->codec_type = icodec->codec_type;
+            ost->st->side_data = av_realloc_array(NULL, ost->enc_ctx->nb_coded_side_data,
+                                                  sizeof(*ost->st->side_data));
+            if (!ost->st->side_data)
+                return AVERROR(ENOMEM);
 
-            if (!codec->codec_tag) {
-                if (!oc->oformat->codec_tag ||
-                     av_codec_get_id (oc->oformat->codec_tag, icodec->codec_tag) == codec->codec_id ||
-                     av_codec_get_tag(oc->oformat->codec_tag, icodec->codec_id) <= 0)
-                    codec->codec_tag = icodec->codec_tag;
+            for (i = 0; i < ost->enc_ctx->nb_coded_side_data; i++) {
+                const AVPacketSideData *sd_src = &ost->enc_ctx->coded_side_data[i];
+                AVPacketSideData *sd_dst = &ost->st->side_data[i];
+
+                sd_dst->data = av_malloc(sd_src->size);
+                if (!sd_dst->data)
+                    return AVERROR(ENOMEM);
+                memcpy(sd_dst->data, sd_src->data, sd_src->size);
+                sd_dst->size = sd_src->size;
+                sd_dst->type = sd_src->type;
+                ost->st->nb_side_data++;
             }
+        }
 
-            codec->bit_rate       = icodec->bit_rate;
-            codec->rc_max_rate    = icodec->rc_max_rate;
-            codec->rc_buffer_size = icodec->rc_buffer_size;
-            codec->field_order    = icodec->field_order;
-            codec->extradata      = av_mallocz(extra_size);
-            if (!codec->extradata) {
-                return AVERROR(ENOMEM);
-            }
-            memcpy(codec->extradata, icodec->extradata, icodec->extradata_size);
-            codec->extradata_size = icodec->extradata_size;
-            if (!copy_tb) {
-                codec->time_base      = icodec->time_base;
-                codec->time_base.num *= icodec->ticks_per_frame;
-                av_reduce(&codec->time_base.num, &codec->time_base.den,
-                          codec->time_base.num, codec->time_base.den, INT_MAX);
-            } else
-                codec->time_base = ist->st->time_base;
+        ost->st->time_base = ost->enc_ctx->time_base;
+    } else if (ost->stream_copy) {
+        ret = init_output_stream_streamcopy(ost);
+        if (ret < 0)
+            return ret;
 
-            ost->parser = av_parser_init(codec->codec_id);
+        /*
+         * FIXME: will the codec context used by the parser during streamcopy
+         * This should go away with the new parser API.
+         */
+        ret = avcodec_parameters_to_context(ost->parser_avctx, ost->st->codecpar);
+        if (ret < 0)
+            return ret;
+    }
 
-            switch (codec->codec_type) {
-            case AVMEDIA_TYPE_AUDIO:
-                if (audio_volume != 256) {
-                    av_log(NULL, AV_LOG_FATAL, "-acodec copy and -vol are incompatible (frames are not decoded)\n");
-                    exit_program(1);
-                }
-                codec->channel_layout     = icodec->channel_layout;
-                codec->sample_rate        = icodec->sample_rate;
-                codec->channels           = icodec->channels;
-                codec->frame_size         = icodec->frame_size;
-                codec->audio_service_type = icodec->audio_service_type;
-                codec->block_align        = icodec->block_align;
-                break;
-            case AVMEDIA_TYPE_VIDEO:
-                codec->pix_fmt            = icodec->pix_fmt;
-                codec->width              = icodec->width;
-                codec->height             = icodec->height;
-                codec->has_b_frames       = icodec->has_b_frames;
-                if (ost->frame_aspect_ratio)
-                    sar = av_d2q(ost->frame_aspect_ratio * codec->height / codec->width, 255);
-                else if (ist->st->sample_aspect_ratio.num)
-                    sar = ist->st->sample_aspect_ratio;
-                else
-                    sar = icodec->sample_aspect_ratio;
-                ost->st->sample_aspect_ratio = codec->sample_aspect_ratio = sar;
-                break;
-            case AVMEDIA_TYPE_SUBTITLE:
-                codec->width  = icodec->width;
-                codec->height = icodec->height;
-                break;
-            case AVMEDIA_TYPE_DATA:
-            case AVMEDIA_TYPE_ATTACHMENT:
-                break;
-            default:
-                abort();
-            }
-        } else {
-            if (!ost->enc) {
-                /* should only happen when a default codec is not present. */
-                snprintf(error, sizeof(error), "Automatic encoder selection "
-                         "failed for output stream #%d:%d. Default encoder for "
-                         "format %s is probably disabled. Please choose an "
-                         "encoder manually.\n", ost->file_index, ost->index,
-                         oc->oformat->name);
-                ret = AVERROR(EINVAL);
-                goto dump_format;
-            }
+    /* initialize bitstream filters for the output stream
+     * needs to be done here, because the codec id for streamcopy is not
+     * known until now */
+    ret = init_output_bsfs(ost);
+    if (ret < 0)
+        return ret;
 
-            if (ist)
-                ist->decoding_needed = 1;
-            ost->encoding_needed = 1;
-
-            /*
-             * We want CFR output if and only if one of those is true:
-             * 1) user specified output framerate with -r
-             * 2) user specified -vsync cfr
-             * 3) output format is CFR and the user didn't force vsync to
-             *    something else than CFR
-             *
-             * in such a case, set ost->frame_rate
-             */
-            if (codec->codec_type == AVMEDIA_TYPE_VIDEO &&
-                !ost->frame_rate.num && ist &&
-                (video_sync_method ==  VSYNC_CFR ||
-                 (video_sync_method ==  VSYNC_AUTO &&
-                  !(oc->oformat->flags & (AVFMT_NOTIMESTAMPS | AVFMT_VARIABLE_FPS))))) {
-                if (ist->framerate.num)
-                    ost->frame_rate = ist->framerate;
-                else if (ist->st->avg_frame_rate.num)
-                    ost->frame_rate = ist->st->avg_frame_rate;
-                else {
-                    av_log(NULL, AV_LOG_WARNING, "Constant framerate requested "
-                           "for the output stream #%d:%d, but no information "
-                           "about the input framerate is available. Falling "
-                           "back to a default value of 25fps. Use the -r option "
-                           "if you want a different framerate.\n",
-                           ost->file_index, ost->index);
-                    ost->frame_rate = (AVRational){ 25, 1 };
-                }
+    ost->mux_timebase = ost->st->time_base;
 
-                if (ost->enc && ost->enc->supported_framerates && !ost->force_fps) {
-                    int idx = av_find_nearest_q_idx(ost->frame_rate, ost->enc->supported_framerates);
-                    ost->frame_rate = ost->enc->supported_framerates[idx];
-                }
-            }
+    ost->initialized = 1;
 
-            if (!ost->filter &&
-                (codec->codec_type == AVMEDIA_TYPE_VIDEO ||
-                 codec->codec_type == AVMEDIA_TYPE_AUDIO)) {
-                    FilterGraph *fg;
-                    fg = init_simple_filtergraph(ist, ost);
-                    if (configure_filtergraph(fg)) {
-                        av_log(NULL, AV_LOG_FATAL, "Error opening filters!\n");
-                        exit_program(1);
-                    }
-            }
+    ret = check_init_output_file(output_files[ost->file_index], ost->file_index);
+    if (ret < 0)
+        return ret;
 
-            switch (codec->codec_type) {
-            case AVMEDIA_TYPE_AUDIO:
-                codec->sample_fmt     = ost->filter->filter->inputs[0]->format;
-                codec->sample_rate    = ost->filter->filter->inputs[0]->sample_rate;
-                codec->channel_layout = ost->filter->filter->inputs[0]->channel_layout;
-                codec->channels       = av_get_channel_layout_nb_channels(codec->channel_layout);
-                codec->time_base      = (AVRational){ 1, codec->sample_rate };
-                break;
-            case AVMEDIA_TYPE_VIDEO:
-                codec->time_base = ost->filter->filter->inputs[0]->time_base;
-
-                codec->width  = ost->filter->filter->inputs[0]->w;
-                codec->height = ost->filter->filter->inputs[0]->h;
-                codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
-                    ost->frame_aspect_ratio ? // overridden by the -aspect cli option
-                    av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
-                    ost->filter->filter->inputs[0]->sample_aspect_ratio;
-                codec->pix_fmt = ost->filter->filter->inputs[0]->format;
-
-                if (icodec &&
-                    (codec->width   != icodec->width  ||
-                     codec->height  != icodec->height ||
-                     codec->pix_fmt != icodec->pix_fmt)) {
-                    codec->bits_per_raw_sample = 0;
-                }
+    return ret;
+}
 
-                if (ost->forced_keyframes)
-                    parse_forced_key_frames(ost->forced_keyframes, ost,
-                                            ost->st->codec);
-                break;
-            case AVMEDIA_TYPE_SUBTITLE:
-                codec->time_base = (AVRational){1, 1000};
-                break;
-            default:
-                abort();
-                break;
-            }
-            /* two pass mode */
-            if ((codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
-                char logfilename[1024];
-                FILE *f;
-
-                snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
-                         ost->logfile_prefix ? ost->logfile_prefix :
-                                               DEFAULT_PASS_LOGFILENAME_PREFIX,
-                         i);
-                if (!strcmp(ost->enc->name, "libx264")) {
-                    av_dict_set(&ost->opts, "stats", logfilename, AV_DICT_DONT_OVERWRITE);
-                } else {
-                    if (codec->flags & CODEC_FLAG_PASS1) {
-                        f = fopen(logfilename, "wb");
-                        if (!f) {
-                            av_log(NULL, AV_LOG_FATAL, "Cannot write log file '%s' for pass-1 encoding: %s\n",
-                                   logfilename, strerror(errno));
-                            exit_program(1);
-                        }
-                        ost->logfile = f;
-                    } else {
-                        char  *logbuffer;
-                        size_t logbuffer_size;
-                        if (cmdutils_read_file(logfilename, &logbuffer, &logbuffer_size) < 0) {
-                            av_log(NULL, AV_LOG_FATAL, "Error reading log file '%s' for pass-2 encoding\n",
-                                   logfilename);
-                            exit_program(1);
-                        }
-                        codec->stats_in = logbuffer;
-                    }
-                }
-            }
-        }
-    }
+static int transcode_init(void)
+{
+    int ret = 0, i, j, k;
+    OutputStream *ost;
+    InputStream *ist;
+    char error[1024];
 
-    /* open each encoder */
-    for (i = 0; i < nb_output_streams; i++) {
-        ost = output_streams[i];
-        if (ost->encoding_needed) {
-            AVCodec      *codec = ost->enc;
-            AVCodecContext *dec = NULL;
-
-            if ((ist = get_input_stream(ost)))
-                dec = ist->st->codec;
-            if (dec && dec->subtitle_header) {
-                ost->st->codec->subtitle_header = av_malloc(dec->subtitle_header_size);
-                if (!ost->st->codec->subtitle_header) {
-                    ret = AVERROR(ENOMEM);
-                    goto dump_format;
-                }
-                memcpy(ost->st->codec->subtitle_header, dec->subtitle_header, dec->subtitle_header_size);
-                ost->st->codec->subtitle_header_size = dec->subtitle_header_size;
-            }
-            if (!av_dict_get(ost->opts, "threads", NULL, 0))
-                av_dict_set(&ost->opts, "threads", "auto", 0);
-            if ((ret = avcodec_open2(ost->st->codec, codec, &ost->opts)) < 0) {
-                if (ret == AVERROR_EXPERIMENTAL)
-                    abort_codec_experimental(codec, 1);
-                snprintf(error, sizeof(error), "Error while opening encoder for output stream #%d:%d - maybe incorrect parameters such as bit_rate, rate, width or height",
-                        ost->file_index, ost->index);
-                goto dump_format;
-            }
-            assert_avoptions(ost->opts);
-            if (ost->st->codec->bit_rate && ost->st->codec->bit_rate < 1000)
-                av_log(NULL, AV_LOG_WARNING, "The bitrate parameter is set too low."
-                                             "It takes bits/s as argument, not kbits/s\n");
-        } else {
-            av_opt_set_dict(ost->st->codec, &ost->opts);
-        }
+    /* init framerate emulation */
+    for (i = 0; i < nb_input_files; i++) {
+        InputFile *ifile = input_files[i];
+        if (ifile->rate_emu)
+            for (j = 0; j < ifile->nb_streams; j++)
+                input_streams[j + ifile->ist_index]->start = av_gettime_relative();
     }
 
     /* init input streams */
@@ -1934,6 +2129,18 @@ static int transcode_init(void)
         if ((ret = init_input_stream(i, error, sizeof(error))) < 0)
             goto dump_format;
 
+    /* open each encoder */
+    for (i = 0; i < nb_output_streams; i++) {
+        // skip streams fed from filtergraphs until we have a frame for them
+        if (output_streams[i]->filter)
+            continue;
+
+        ret = init_output_stream(output_streams[i], error, sizeof(error));
+        if (ret < 0)
+            goto dump_format;
+    }
+
+
     /* discard unused programs */
     for (i = 0; i < nb_input_files; i++) {
         InputFile *ifile = input_files[i];
@@ -1950,40 +2157,14 @@ static int transcode_init(void)
         }
     }
 
-    /* open files and write file headers */
-    for (i = 0; i < nb_output_files; i++) {
-        oc = output_files[i]->ctx;
-        oc->interrupt_callback = int_cb;
-        if ((ret = avformat_write_header(oc, &output_files[i]->opts)) < 0) {
-            char errbuf[128];
-            av_strerror(ret, errbuf, sizeof(errbuf));
-            snprintf(error, sizeof(error),
-                     "Could not write header for output file #%d "
-                     "(incorrect codec parameters ?): %s",
-                     i, errbuf);
-            ret = AVERROR(EINVAL);
-            goto dump_format;
-        }
-        assert_avoptions(output_files[i]->opts);
-        if (strcmp(oc->oformat->name, "rtp")) {
-            want_sdp = 0;
-        }
-    }
-
  dump_format:
-    /* dump the file output parameters - cannot be done before in case
-       of stream copy */
-    for (i = 0; i < nb_output_files; i++) {
-        av_dump_format(output_files[i]->ctx, i, output_files[i]->ctx->filename, 1);
-    }
-
     /* dump the stream mapping */
     av_log(NULL, AV_LOG_INFO, "Stream mapping:\n");
     for (i = 0; i < nb_input_streams; i++) {
         ist = input_streams[i];
 
         for (j = 0; j < ist->nb_filters; j++) {
-            if (ist->filters[j]->graph->graph_desc) {
+            if (!filtergraph_is_simple(ist->filters[j]->graph)) {
                 av_log(NULL, AV_LOG_INFO, "  Stream #%d:%d (%s) -> %s",
                        ist->file_index, ist->st->index, ist->dec ? ist->dec->name : "?",
                        ist->filters[j]->name);
@@ -2004,7 +2185,7 @@ static int transcode_init(void)
             continue;
         }
 
-        if (ost->filter && ost->filter->graph->graph_desc) {
+        if (ost->filter && !filtergraph_is_simple(ost->filter->graph)) {
             /* output from a complex graph */
             av_log(NULL, AV_LOG_INFO, "  %s", ost->filter->name);
             if (nb_filtergraphs > 1)
@@ -2026,10 +2207,37 @@ static int transcode_init(void)
                    ost->sync_ist->st->index);
         if (ost->stream_copy)
             av_log(NULL, AV_LOG_INFO, " (copy)");
-        else
-            av_log(NULL, AV_LOG_INFO, " (%s -> %s)", input_streams[ost->source_index]->dec ?
-                   input_streams[ost->source_index]->dec->name : "?",
-                   ost->enc ? ost->enc->name : "?");
+        else {
+            const AVCodec *in_codec    = input_streams[ost->source_index]->dec;
+            const AVCodec *out_codec   = ost->enc;
+            const char *decoder_name   = "?";
+            const char *in_codec_name  = "?";
+            const char *encoder_name   = "?";
+            const char *out_codec_name = "?";
+            const AVCodecDescriptor *desc;
+
+            if (in_codec) {
+                decoder_name  = in_codec->name;
+                desc = avcodec_descriptor_get(in_codec->id);
+                if (desc)
+                    in_codec_name = desc->name;
+                if (!strcmp(decoder_name, in_codec_name))
+                    decoder_name = "native";
+            }
+
+            if (out_codec) {
+                encoder_name   = out_codec->name;
+                desc = avcodec_descriptor_get(out_codec->id);
+                if (desc)
+                    out_codec_name = desc->name;
+                if (!strcmp(encoder_name, out_codec_name))
+                    encoder_name = "native";
+            }
+
+            av_log(NULL, AV_LOG_INFO, " (%s (%s) -> %s (%s))",
+                   in_codec_name, decoder_name,
+                   out_codec_name, encoder_name);
+        }
         av_log(NULL, AV_LOG_INFO, "\n");
     }
 
@@ -2038,10 +2246,6 @@ static int transcode_init(void)
         return ret;
     }
 
-    if (want_sdp) {
-        print_sdp();
-    }
-
     return 0;
 }
 
@@ -2115,7 +2319,6 @@ static void *input_thread(void *arg)
         while (!av_fifo_space(f->fifo))
             pthread_cond_wait(&f->fifo_cond, &f->fifo_lock);
 
-        av_dup_packet(&pkt);
         av_fifo_generic_write(f->fifo, &pkt, sizeof(pkt), NULL);
 
         pthread_mutex_unlock(&f->fifo_lock);
@@ -2144,7 +2347,7 @@ static void free_input_threads(void)
         pthread_mutex_lock(&f->fifo_lock);
         while (av_fifo_size(f->fifo)) {
             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
-            av_free_packet(&pkt);
+            av_packet_unref(&pkt);
         }
         pthread_cond_signal(&f->fifo_cond);
         pthread_mutex_unlock(&f->fifo_lock);
@@ -2154,7 +2357,7 @@ static void free_input_threads(void)
 
         while (av_fifo_size(f->fifo)) {
             av_fifo_generic_read(f->fifo, &pkt, sizeof(pkt), NULL);
-            av_free_packet(&pkt);
+            av_packet_unref(&pkt);
         }
         av_fifo_free(f->fifo);
     }
@@ -2211,7 +2414,7 @@ static int get_input_packet(InputFile *f, AVPacket *pkt)
         for (i = 0; i < f->nb_streams; i++) {
             InputStream *ist = input_streams[f->ist_index + i];
             int64_t pts = av_rescale(ist->last_dts, 1000000, AV_TIME_BASE);
-            int64_t now = av_gettime() - ist->start;
+            int64_t now = av_gettime_relative() - ist->start;
             if (pts > now)
                 return AVERROR(EAGAIN);
         }
@@ -2240,6 +2443,87 @@ static void reset_eagain(void)
         input_files[i]->eagain = 0;
 }
 
+// set duration to max(tmp, duration) in a proper time base and return duration's time_base
+static AVRational duration_max(int64_t tmp, int64_t *duration, AVRational tmp_time_base,
+                                AVRational time_base)
+{
+    int ret;
+
+    if (!*duration) {
+        *duration = tmp;
+        return tmp_time_base;
+    }
+
+    ret = av_compare_ts(*duration, time_base, tmp, tmp_time_base);
+    if (ret < 0) {
+        *duration = tmp;
+        return tmp_time_base;
+    }
+
+    return time_base;
+}
+
+static int seek_to_start(InputFile *ifile, AVFormatContext *is)
+{
+    InputStream *ist;
+    AVCodecContext *avctx;
+    int i, ret, has_audio = 0;
+    int64_t duration = 0;
+
+    ret = av_seek_frame(is, -1, is->start_time, 0);
+    if (ret < 0)
+        return ret;
+
+    for (i = 0; i < ifile->nb_streams; i++) {
+        ist   = input_streams[ifile->ist_index + i];
+        avctx = ist->dec_ctx;
+
+        // flush decoders
+        if (ist->decoding_needed) {
+            process_input_packet(ist, NULL, 1);
+            avcodec_flush_buffers(avctx);
+        }
+
+        /* duration is the length of the last frame in a stream
+         * when audio stream is present we don't care about
+         * last video frame length because it's not defined exactly */
+        if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && ist->nb_samples)
+            has_audio = 1;
+    }
+
+    for (i = 0; i < ifile->nb_streams; i++) {
+        ist   = input_streams[ifile->ist_index + i];
+        avctx = ist->dec_ctx;
+
+        if (has_audio) {
+            if (avctx->codec_type == AVMEDIA_TYPE_AUDIO && ist->nb_samples) {
+                AVRational sample_rate = {1, avctx->sample_rate};
+
+                duration = av_rescale_q(ist->nb_samples, sample_rate, ist->st->time_base);
+            } else
+                continue;
+        } else {
+            if (ist->framerate.num) {
+                duration = av_rescale_q(1, ist->framerate, ist->st->time_base);
+            } else if (ist->st->avg_frame_rate.num) {
+                duration = av_rescale_q(1, ist->st->avg_frame_rate, ist->st->time_base);
+            } else duration = 1;
+        }
+        if (!ifile->duration)
+            ifile->time_base = ist->st->time_base;
+        /* the total duration of the stream, max_pts - min_pts is
+         * the duration of the stream without the last frame */
+        duration += ist->max_pts - ist->min_pts;
+        ifile->time_base = duration_max(duration, &ifile->duration, ist->st->time_base,
+                                        ifile->time_base);
+    }
+
+    if (ifile->loop > 0)
+        ifile->loop--;
+
+    return ret;
+}
+
 /*
  * Read one packet from an input file and send it for
  * - decoding -> lavfi (audio/video)
@@ -2259,6 +2543,7 @@ static int process_input(void)
     InputStream *ist;
     AVPacket pkt;
     int ret, i, j;
+    int64_t duration;
 
     /* select the stream that we must read now */
     ifile = select_input_file();
@@ -2280,6 +2565,11 @@ static int process_input(void)
         ifile->eagain = 1;
         return ret;
     }
+    if (ret < 0 && ifile->loop) {
+        if ((ret = seek_to_start(ifile, is)) < 0)
+            return ret;
+        ret = get_input_packet(ifile, &pkt);
+    }
     if (ret < 0) {
         if (ret != AVERROR_EOF) {
             print_error(is->filename, ret);
@@ -2291,7 +2581,7 @@ static int process_input(void)
         for (i = 0; i < ifile->nb_streams; i++) {
             ist = input_streams[ifile->ist_index + i];
             if (ist->decoding_needed)
-                output_packet(ist, NULL);
+                process_input_packet(ist, NULL, 0);
 
             /* mark all outputs that don't go through lavfi as finished */
             for (j = 0; j < nb_output_streams; j++) {
@@ -2299,7 +2589,7 @@ static int process_input(void)
 
                 if (ost->source_index == ifile->ist_index + i &&
                     (ost->stream_copy || ost->enc->type == AVMEDIA_TYPE_SUBTITLE))
-                    ost->finished= 1;
+                    finish_output_stream(ost);
             }
         }
 
@@ -2333,6 +2623,8 @@ static int process_input(void)
 
             if (av_packet_get_side_data(&pkt, src_sd->type, NULL))
                 continue;
+            if (ist->autorotate && src_sd->type == AV_PKT_DATA_DISPLAYMATRIX)
+                continue;
 
             dst_data = av_packet_new_side_data(&pkt, src_sd->type, src_sd->size);
             if (!dst_data)
@@ -2351,7 +2643,9 @@ static int process_input(void)
     if (pkt.dts != AV_NOPTS_VALUE)
         pkt.dts *= ist->ts_scale;
 
-    if (pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
+    if ((ist->dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO ||
+         ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) &&
+        pkt.dts != AV_NOPTS_VALUE && ist->next_dts != AV_NOPTS_VALUE &&
         (is->iformat->flags & AVFMT_TS_DISCONT)) {
         int64_t pkt_dts = av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
         int64_t delta   = pkt_dts - ist->next_dts;
@@ -2366,17 +2660,20 @@ static int process_input(void)
                 pkt.pts -= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
         }
     }
-
-    ret = output_packet(ist, &pkt);
-    if (ret < 0) {
-        av_log(NULL, AV_LOG_ERROR, "Error while decoding stream #%d:%d\n",
-               ist->file_index, ist->st->index);
-        if (exit_on_error)
-            exit_program(1);
+    duration = av_rescale_q(ifile->duration, ifile->time_base, ist->st->time_base);
+    if (pkt.pts != AV_NOPTS_VALUE) {
+        pkt.pts += duration;
+        ist->max_pts = FFMAX(pkt.pts, ist->max_pts);
+        ist->min_pts = FFMIN(pkt.pts, ist->min_pts);
     }
 
+    if (pkt.dts != AV_NOPTS_VALUE)
+        pkt.dts += duration;
+
+    process_input_packet(ist, &pkt, 0);
+
 discard_packet:
-    av_free_packet(&pkt);
+    av_packet_unref(&pkt);
 
     return 0;
 }
@@ -2399,7 +2696,7 @@ static int transcode(void)
     av_log(NULL, AV_LOG_INFO, "Press ctrl-c to stop encoding\n");
     term_init();
 
-    timer_start = av_gettime();
+    timer_start = av_gettime_relative();
 
 #if HAVE_PTHREADS
     if ((ret = init_input_threads()) < 0)
@@ -2421,11 +2718,11 @@ static int transcode(void)
         }
 
         ret = poll_filters();
-        if (ret < 0) {
-            if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
-                continue;
+        if (ret < 0 && ret != AVERROR_EOF) {
+            char errbuf[128];
+            av_strerror(ret, errbuf, sizeof(errbuf));
 
-            av_log(NULL, AV_LOG_ERROR, "Error while filtering.\n");
+            av_log(NULL, AV_LOG_ERROR, "Error while filtering: %s\n", errbuf);
             break;
         }
 
@@ -2440,7 +2737,7 @@ static int transcode(void)
     for (i = 0; i < nb_input_streams; i++) {
         ist = input_streams[i];
         if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
-            output_packet(ist, NULL);
+            process_input_packet(ist, NULL, 0);
         }
     }
     poll_filters();
@@ -2451,6 +2748,13 @@ static int transcode(void)
     /* write the trailer if needed and close file */
     for (i = 0; i < nb_output_files; i++) {
         os = output_files[i]->ctx;
+        if (!output_files[i]->header_written) {
+            av_log(NULL, AV_LOG_ERROR,
+                   "Nothing was written into output file %d (%s), because "
+                   "at least one of its streams received no packets.\n",
+                   i, os->filename);
+            continue;
+        }
         av_write_trailer(os);
     }
 
@@ -2461,8 +2765,7 @@ static int transcode(void)
     for (i = 0; i < nb_output_streams; i++) {
         ost = output_streams[i];
         if (ost->encoding_needed) {
-            av_freep(&ost->st->codec->stats_in);
-            avcodec_close(ost->st->codec);
+            av_freep(&ost->enc_ctx->stats_in);
         }
     }
 
@@ -2470,12 +2773,14 @@ static int transcode(void)
     for (i = 0; i < nb_input_streams; i++) {
         ist = input_streams[i];
         if (ist->decoding_needed) {
-            avcodec_close(ist->st->codec);
+            avcodec_close(ist->dec_ctx);
             if (ist->hwaccel_uninit)
-                ist->hwaccel_uninit(ist->st->codec);
+                ist->hwaccel_uninit(ist->dec_ctx);
         }
     }
 
+    av_buffer_unref(&hw_device_ctx);
+
     /* finished ! */
     ret = 0;
 
@@ -2488,15 +2793,12 @@ static int transcode(void)
         for (i = 0; i < nb_output_streams; i++) {
             ost = output_streams[i];
             if (ost) {
-                if (ost->stream_copy)
-                    av_freep(&ost->st->codec->extradata);
                 if (ost->logfile) {
                     fclose(ost->logfile);
                     ost->logfile = NULL;
                 }
-                av_freep(&ost->st->codec->subtitle_header);
                 av_free(ost->forced_kf_pts);
-                av_dict_free(&ost->opts);
+                av_dict_free(&ost->encoder_opts);
                 av_dict_free(&ost->resample_opts);
             }
         }
@@ -2518,7 +2820,7 @@ static int64_t getutime(void)
     GetProcessTimes(proc, &c, &e, &k, &u);
     return ((int64_t) u.dwHighDateTime << 32 | u.dwLowDateTime) / 10;
 #else
-    return av_gettime();
+    return av_gettime_relative();
 #endif
 }
 
@@ -2542,7 +2844,7 @@ static int64_t getmaxrss(void)
 
 int main(int argc, char **argv)
 {
-    int ret;
+    int i, ret;
     int64_t ti;
 
     register_exit(avconv_cleanup);
@@ -2577,6 +2879,11 @@ int main(int argc, char **argv)
         exit_program(1);
     }
 
+    for (i = 0; i < nb_output_files; i++) {
+        if (strcmp(output_files[i]->ctx->oformat->name, "rtp"))
+            want_sdp = 0;
+    }
+
     ti = getutime();
     if (transcode() < 0)
         exit_program(1);