2 * ffmpeg filter configuration
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "libavfilter/avfilter.h"
26 #include "libavfilter/buffersink.h"
27 #include "libavfilter/buffersrc.h"
29 #include "libavresample/avresample.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/avstring.h"
33 #include "libavutil/bprint.h"
34 #include "libavutil/channel_layout.h"
35 #include "libavutil/display.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/pixfmt.h"
39 #include "libavutil/imgutils.h"
40 #include "libavutil/samplefmt.h"
42 static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
44 static const enum AVPixelFormat mjpeg_formats[] =
45 { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
46 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
48 static const enum AVPixelFormat ljpeg_formats[] =
49 { AV_PIX_FMT_BGR24 , AV_PIX_FMT_BGRA , AV_PIX_FMT_BGR0,
50 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
51 AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
54 if (codec_id == AV_CODEC_ID_MJPEG) {
56 } else if (codec_id == AV_CODEC_ID_LJPEG) {
59 return default_formats;
63 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
65 if (codec && codec->pix_fmts) {
66 const enum AVPixelFormat *p = codec->pix_fmts;
67 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
68 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
69 enum AVPixelFormat best= AV_PIX_FMT_NONE;
71 if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
72 p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
74 for (; *p != AV_PIX_FMT_NONE; p++) {
75 best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
79 if (*p == AV_PIX_FMT_NONE) {
80 if (target != AV_PIX_FMT_NONE)
81 av_log(NULL, AV_LOG_WARNING,
82 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
83 av_get_pix_fmt_name(target),
85 av_get_pix_fmt_name(best));
92 void choose_sample_fmt(AVStream *st, AVCodec *codec)
94 if (codec && codec->sample_fmts) {
95 const enum AVSampleFormat *p = codec->sample_fmts;
96 for (; *p != -1; p++) {
97 if (*p == st->codecpar->format)
101 if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codecpar->format) > av_get_sample_fmt_name(codec->sample_fmts[0]))
102 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
103 if(av_get_sample_fmt_name(st->codecpar->format))
104 av_log(NULL, AV_LOG_WARNING,
105 "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
106 av_get_sample_fmt_name(st->codecpar->format),
108 av_get_sample_fmt_name(codec->sample_fmts[0]));
109 st->codecpar->format = codec->sample_fmts[0];
114 static char *choose_pix_fmts(OutputStream *ost)
116 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
118 // used by choose_pixel_fmt() and below
119 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
121 if (ost->keep_pix_fmt) {
123 avfilter_graph_set_auto_convert(ost->filter->graph->graph,
124 AVFILTER_AUTO_CONVERT_NONE);
125 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
127 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
129 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
130 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
131 } else if (ost->enc && ost->enc->pix_fmts) {
132 const enum AVPixelFormat *p;
133 AVIOContext *s = NULL;
137 if (avio_open_dyn_buf(&s) < 0)
140 p = ost->enc->pix_fmts;
141 if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
142 p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
145 for (; *p != AV_PIX_FMT_NONE; p++) {
146 const char *name = av_get_pix_fmt_name(*p);
147 avio_printf(s, "%s|", name);
149 len = avio_close_dyn_buf(s, &ret);
156 /* Define a function for building a string containing a list of
157 * allowed formats. */
158 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name) \
159 static char *choose_ ## var ## s(OutputStream *ost) \
161 if (ost->enc_ctx->var != none) { \
162 get_name(ost->enc_ctx->var); \
163 return av_strdup(name); \
164 } else if (ost->enc && ost->enc->supported_list) { \
166 AVIOContext *s = NULL; \
170 if (avio_open_dyn_buf(&s) < 0) \
173 for (p = ost->enc->supported_list; *p != none; p++) { \
175 avio_printf(s, "%s|", name); \
177 len = avio_close_dyn_buf(s, &ret); \
184 // DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
187 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
188 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
190 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
191 GET_SAMPLE_RATE_NAME)
193 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
196 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
198 FilterGraph *fg = av_mallocz(sizeof(*fg));
202 fg->index = nb_filtergraphs;
204 GROW_ARRAY(fg->outputs, fg->nb_outputs);
205 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
207 fg->outputs[0]->ost = ost;
208 fg->outputs[0]->graph = fg;
210 ost->filter = fg->outputs[0];
212 GROW_ARRAY(fg->inputs, fg->nb_inputs);
213 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
215 fg->inputs[0]->ist = ist;
216 fg->inputs[0]->graph = fg;
218 GROW_ARRAY(ist->filters, ist->nb_filters);
219 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
221 GROW_ARRAY(filtergraphs, nb_filtergraphs);
222 filtergraphs[nb_filtergraphs - 1] = fg;
227 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
229 InputStream *ist = NULL;
230 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
233 // TODO: support other filter types
234 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
235 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
244 int file_idx = strtol(in->name, &p, 0);
246 if (file_idx < 0 || file_idx >= nb_input_files) {
247 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
248 file_idx, fg->graph_desc);
251 s = input_files[file_idx]->ctx;
253 for (i = 0; i < s->nb_streams; i++) {
254 enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
255 if (stream_type != type &&
256 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
257 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
259 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
265 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
266 "matches no streams.\n", p, fg->graph_desc);
269 ist = input_streams[input_files[file_idx]->ist_index + st->index];
271 /* find the first unused stream of corresponding type */
272 for (i = 0; i < nb_input_streams; i++) {
273 ist = input_streams[i];
274 if (ist->dec_ctx->codec_type == type && ist->discard)
277 if (i == nb_input_streams) {
278 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
279 "unlabeled input pad %d on filter %s\n", in->pad_idx,
280 in->filter_ctx->name);
287 ist->decoding_needed |= DECODING_FOR_FILTER;
288 ist->st->discard = AVDISCARD_NONE;
290 GROW_ARRAY(fg->inputs, fg->nb_inputs);
291 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
293 fg->inputs[fg->nb_inputs - 1]->ist = ist;
294 fg->inputs[fg->nb_inputs - 1]->graph = fg;
296 GROW_ARRAY(ist->filters, ist->nb_filters);
297 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
300 int init_complex_filtergraph(FilterGraph *fg)
302 AVFilterInOut *inputs, *outputs, *cur;
303 AVFilterGraph *graph;
306 /* this graph is only used for determining the kinds of inputs
307 * and outputs we have, and is discarded on exit from this function */
308 graph = avfilter_graph_alloc();
310 return AVERROR(ENOMEM);
312 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
316 for (cur = inputs; cur; cur = cur->next)
317 init_input_filter(fg, cur);
319 for (cur = outputs; cur;) {
320 GROW_ARRAY(fg->outputs, fg->nb_outputs);
321 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
322 if (!fg->outputs[fg->nb_outputs - 1])
325 fg->outputs[fg->nb_outputs - 1]->graph = fg;
326 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
327 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
330 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
334 avfilter_inout_free(&inputs);
335 avfilter_graph_free(&graph);
339 static int insert_trim(int64_t start_time, int64_t duration,
340 AVFilterContext **last_filter, int *pad_idx,
341 const char *filter_name)
343 AVFilterGraph *graph = (*last_filter)->graph;
344 AVFilterContext *ctx;
345 const AVFilter *trim;
346 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
347 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
350 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
353 trim = avfilter_get_by_name(name);
355 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
356 "recording time.\n", name);
357 return AVERROR_FILTER_NOT_FOUND;
360 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
362 return AVERROR(ENOMEM);
364 if (duration != INT64_MAX) {
365 ret = av_opt_set_int(ctx, "durationi", duration,
366 AV_OPT_SEARCH_CHILDREN);
368 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
369 ret = av_opt_set_int(ctx, "starti", start_time,
370 AV_OPT_SEARCH_CHILDREN);
373 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
377 ret = avfilter_init_str(ctx, NULL);
381 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
390 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
391 const char *filter_name, const char *args)
393 AVFilterGraph *graph = (*last_filter)->graph;
394 AVFilterContext *ctx;
397 ret = avfilter_graph_create_filter(&ctx,
398 avfilter_get_by_name(filter_name),
399 filter_name, args, NULL, graph);
403 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
412 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
415 OutputStream *ost = ofilter->ost;
416 OutputFile *of = output_files[ost->file_index];
417 AVCodecContext *codec = ost->enc_ctx;
418 AVFilterContext *last_filter = out->filter_ctx;
419 int pad_idx = out->pad_idx;
423 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
424 ret = avfilter_graph_create_filter(&ofilter->filter,
425 avfilter_get_by_name("buffersink"),
426 name, NULL, NULL, fg->graph);
431 if (!hw_device_ctx && (codec->width || codec->height)) {
433 AVFilterContext *filter;
434 AVDictionaryEntry *e = NULL;
436 snprintf(args, sizeof(args), "%d:%d",
440 while ((e = av_dict_get(ost->sws_dict, "", e,
441 AV_DICT_IGNORE_SUFFIX))) {
442 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
445 snprintf(name, sizeof(name), "scaler for output stream %d:%d",
446 ost->file_index, ost->index);
447 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
448 name, args, NULL, fg->graph)) < 0)
450 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
453 last_filter = filter;
457 if ((pix_fmts = choose_pix_fmts(ost))) {
458 AVFilterContext *filter;
459 snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
460 ost->file_index, ost->index);
461 ret = avfilter_graph_create_filter(&filter,
462 avfilter_get_by_name("format"),
463 "format", pix_fmts, NULL, fg->graph);
467 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
470 last_filter = filter;
474 if (ost->frame_rate.num && 0) {
475 AVFilterContext *fps;
478 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
479 ost->frame_rate.den);
480 snprintf(name, sizeof(name), "fps for output stream %d:%d",
481 ost->file_index, ost->index);
482 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
483 name, args, NULL, fg->graph);
487 ret = avfilter_link(last_filter, pad_idx, fps, 0);
494 snprintf(name, sizeof(name), "trim for output stream %d:%d",
495 ost->file_index, ost->index);
496 ret = insert_trim(of->start_time, of->recording_time,
497 &last_filter, &pad_idx, name);
502 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
508 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
510 OutputStream *ost = ofilter->ost;
511 OutputFile *of = output_files[ost->file_index];
512 AVCodecContext *codec = ost->enc_ctx;
513 AVFilterContext *last_filter = out->filter_ctx;
514 int pad_idx = out->pad_idx;
515 char *sample_fmts, *sample_rates, *channel_layouts;
519 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
520 ret = avfilter_graph_create_filter(&ofilter->filter,
521 avfilter_get_by_name("abuffersink"),
522 name, NULL, NULL, fg->graph);
525 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
528 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
529 AVFilterContext *filt_ctx; \
531 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
532 "similarly to -af " filter_name "=%s.\n", arg); \
534 ret = avfilter_graph_create_filter(&filt_ctx, \
535 avfilter_get_by_name(filter_name), \
536 filter_name, arg, NULL, fg->graph); \
540 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
544 last_filter = filt_ctx; \
547 if (ost->audio_channels_mapped) {
550 av_bprint_init(&pan_buf, 256, 8192);
551 av_bprintf(&pan_buf, "0x%"PRIx64,
552 av_get_default_channel_layout(ost->audio_channels_mapped));
553 for (i = 0; i < ost->audio_channels_mapped; i++)
554 if (ost->audio_channels_map[i] != -1)
555 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
557 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
558 av_bprint_finalize(&pan_buf, NULL);
561 if (codec->channels && !codec->channel_layout)
562 codec->channel_layout = av_get_default_channel_layout(codec->channels);
564 sample_fmts = choose_sample_fmts(ost);
565 sample_rates = choose_sample_rates(ost);
566 channel_layouts = choose_channel_layouts(ost);
567 if (sample_fmts || sample_rates || channel_layouts) {
568 AVFilterContext *format;
573 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
576 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
579 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
582 av_freep(&sample_fmts);
583 av_freep(&sample_rates);
584 av_freep(&channel_layouts);
586 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
587 ost->file_index, ost->index);
588 ret = avfilter_graph_create_filter(&format,
589 avfilter_get_by_name("aformat"),
590 name, args, NULL, fg->graph);
594 ret = avfilter_link(last_filter, pad_idx, format, 0);
598 last_filter = format;
602 if (audio_volume != 256 && 0) {
605 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
606 AUTO_INSERT_FILTER("-vol", "volume", args);
609 if (ost->apad && of->shortest) {
613 for (i=0; i<of->ctx->nb_streams; i++)
614 if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
617 if (i<of->ctx->nb_streams) {
618 snprintf(args, sizeof(args), "%s", ost->apad);
619 AUTO_INSERT_FILTER("-apad", "apad", args);
623 snprintf(name, sizeof(name), "trim for output stream %d:%d",
624 ost->file_index, ost->index);
625 ret = insert_trim(of->start_time, of->recording_time,
626 &last_filter, &pad_idx, name);
630 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
636 #define DESCRIBE_FILTER_LINK(f, inout, in) \
638 AVFilterContext *ctx = inout->filter_ctx; \
639 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
640 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
643 if (avio_open_dyn_buf(&pb) < 0) \
646 avio_printf(pb, "%s", ctx->filter->name); \
648 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
650 avio_close_dyn_buf(pb, &f->name); \
653 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
655 av_freep(&ofilter->name);
656 DESCRIBE_FILTER_LINK(ofilter, out, 0);
659 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
663 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
664 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
665 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
666 default: av_assert0(0);
670 static int sub2video_prepare(InputStream *ist)
672 AVFormatContext *avf = input_files[ist->file_index]->ctx;
675 /* Compute the size of the canvas for the subtitles stream.
676 If the subtitles codecpar has set a size, use it. Otherwise use the
677 maximum dimensions of the video streams in the same file. */
678 w = ist->dec_ctx->width;
679 h = ist->dec_ctx->height;
681 for (i = 0; i < avf->nb_streams; i++) {
682 if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
683 w = FFMAX(w, avf->streams[i]->codecpar->width);
684 h = FFMAX(h, avf->streams[i]->codecpar->height);
691 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
693 ist->sub2video.w = ist->resample_width = w;
694 ist->sub2video.h = ist->resample_height = h;
696 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
697 palettes for all rectangles are identical or compatible */
698 ist->resample_pix_fmt = ist->dec_ctx->pix_fmt = AV_PIX_FMT_RGB32;
700 ist->sub2video.frame = av_frame_alloc();
701 if (!ist->sub2video.frame)
702 return AVERROR(ENOMEM);
703 ist->sub2video.last_pts = INT64_MIN;
707 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
710 AVFilterContext *last_filter;
711 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
712 InputStream *ist = ifilter->ist;
713 InputFile *f = input_files[ist->file_index];
714 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
716 AVRational fr = ist->framerate;
720 int ret, pad_idx = 0;
721 int64_t tsoffset = 0;
722 AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
725 return AVERROR(ENOMEM);
726 memset(par, 0, sizeof(*par));
727 par->format = AV_PIX_FMT_NONE;
729 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
730 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
731 ret = AVERROR(EINVAL);
736 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
738 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
739 ret = sub2video_prepare(ist);
744 sar = ist->st->sample_aspect_ratio.num ?
745 ist->st->sample_aspect_ratio :
746 ist->dec_ctx->sample_aspect_ratio;
748 sar = (AVRational){0,1};
749 av_bprint_init(&args, 0, 1);
751 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
752 "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
753 ist->resample_height,
754 ist->hwaccel_retrieve_data ? ist->hwaccel_retrieved_pix_fmt : ist->resample_pix_fmt,
755 tb.num, tb.den, sar.num, sar.den,
756 SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
757 if (fr.num && fr.den)
758 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
759 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
760 ist->file_index, ist->st->index);
763 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
764 args.str, NULL, fg->graph)) < 0)
766 par->hw_frames_ctx = ist->hw_frames_ctx;
767 ret = av_buffersrc_parameters_set(ifilter->filter, par);
771 last_filter = ifilter->filter;
773 if (ist->autorotate) {
774 double theta = get_rotation(ist->st);
776 if (fabs(theta - 90) < 1.0) {
777 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
778 } else if (fabs(theta - 180) < 1.0) {
779 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
782 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
783 } else if (fabs(theta - 270) < 1.0) {
784 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
785 } else if (fabs(theta) > 1.0) {
787 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
788 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
794 if (ist->framerate.num) {
795 AVFilterContext *setpts;
797 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
798 ist->file_index, ist->st->index);
799 if ((ret = avfilter_graph_create_filter(&setpts,
800 avfilter_get_by_name("setpts"),
805 if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
808 last_filter = setpts;
811 if (do_deinterlace) {
812 AVFilterContext *yadif;
814 snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
815 ist->file_index, ist->st->index);
816 if ((ret = avfilter_graph_create_filter(&yadif,
817 avfilter_get_by_name("yadif"),
822 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
828 snprintf(name, sizeof(name), "trim for input stream %d:%d",
829 ist->file_index, ist->st->index);
831 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
832 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
833 tsoffset += f->ctx->start_time;
835 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
836 AV_NOPTS_VALUE : tsoffset, f->recording_time,
837 &last_filter, &pad_idx, name);
841 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
850 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
853 AVFilterContext *last_filter;
854 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
855 InputStream *ist = ifilter->ist;
856 InputFile *f = input_files[ist->file_index];
859 int ret, pad_idx = 0;
860 int64_t tsoffset = 0;
862 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
863 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
864 return AVERROR(EINVAL);
867 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
868 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
869 1, ist->dec_ctx->sample_rate,
870 ist->dec_ctx->sample_rate,
871 av_get_sample_fmt_name(ist->dec_ctx->sample_fmt));
872 if (ist->dec_ctx->channel_layout)
873 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
874 ist->dec_ctx->channel_layout);
876 av_bprintf(&args, ":channels=%d", ist->dec_ctx->channels);
877 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
878 ist->file_index, ist->st->index);
880 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
881 name, args.str, NULL,
884 last_filter = ifilter->filter;
886 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
887 AVFilterContext *filt_ctx; \
889 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
890 "similarly to -af " filter_name "=%s.\n", arg); \
892 snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
893 fg->index, filter_name, ist->file_index, ist->st->index); \
894 ret = avfilter_graph_create_filter(&filt_ctx, \
895 avfilter_get_by_name(filter_name), \
896 name, arg, NULL, fg->graph); \
900 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
904 last_filter = filt_ctx; \
907 if (audio_sync_method > 0) {
908 char args[256] = {0};
910 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
911 if (audio_drift_threshold != 0.1)
912 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
913 if (!fg->reconfiguration)
914 av_strlcatf(args, sizeof(args), ":first_pts=0");
915 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
918 // if (ost->audio_channels_mapped) {
921 // av_bprint_init(&pan_buf, 256, 8192);
922 // av_bprintf(&pan_buf, "0x%"PRIx64,
923 // av_get_default_channel_layout(ost->audio_channels_mapped));
924 // for (i = 0; i < ost->audio_channels_mapped; i++)
925 // if (ost->audio_channels_map[i] != -1)
926 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
927 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
928 // av_bprint_finalize(&pan_buf, NULL);
931 if (audio_volume != 256) {
934 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
935 "audio filter instead.\n");
937 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
938 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
941 snprintf(name, sizeof(name), "trim for input stream %d:%d",
942 ist->file_index, ist->st->index);
944 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
945 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
946 tsoffset += f->ctx->start_time;
948 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
949 AV_NOPTS_VALUE : tsoffset, f->recording_time,
950 &last_filter, &pad_idx, name);
954 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
960 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
963 av_freep(&ifilter->name);
964 DESCRIBE_FILTER_LINK(ifilter, in, 1);
966 if (!ifilter->ist->dec) {
967 av_log(NULL, AV_LOG_ERROR,
968 "No decoder for stream #%d:%d, filtering impossible\n",
969 ifilter->ist->file_index, ifilter->ist->st->index);
970 return AVERROR_DECODER_NOT_FOUND;
972 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
973 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
974 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
975 default: av_assert0(0);
979 int configure_filtergraph(FilterGraph *fg)
981 AVFilterInOut *inputs, *outputs, *cur;
982 int ret, i, simple = filtergraph_is_simple(fg);
983 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
986 avfilter_graph_free(&fg->graph);
987 if (!(fg->graph = avfilter_graph_alloc()))
988 return AVERROR(ENOMEM);
991 OutputStream *ost = fg->outputs[0]->ost;
993 AVDictionaryEntry *e = NULL;
996 while ((e = av_dict_get(ost->sws_dict, "", e,
997 AV_DICT_IGNORE_SUFFIX))) {
998 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1001 args[strlen(args)-1] = 0;
1002 fg->graph->scale_sws_opts = av_strdup(args);
1005 while ((e = av_dict_get(ost->swr_opts, "", e,
1006 AV_DICT_IGNORE_SUFFIX))) {
1007 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1010 args[strlen(args)-1] = 0;
1011 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1014 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1015 AV_DICT_IGNORE_SUFFIX))) {
1016 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1019 args[strlen(args) - 1] = '\0';
1020 fg->graph->resample_lavr_opts = av_strdup(args);
1022 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1024 av_opt_set(fg->graph, "threads", e->value, 0);
1027 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1030 if (hw_device_ctx) {
1031 for (i = 0; i < fg->graph->nb_filters; i++) {
1032 fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(hw_device_ctx);
1036 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1037 const char *num_inputs;
1038 const char *num_outputs;
1041 } else if (outputs->next) {
1048 } else if (inputs->next) {
1053 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1054 "to have exactly 1 input and 1 output."
1055 " However, it had %s input(s) and %s output(s)."
1056 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1057 graph_desc, num_inputs, num_outputs);
1058 return AVERROR(EINVAL);
1061 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1062 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1063 avfilter_inout_free(&inputs);
1064 avfilter_inout_free(&outputs);
1067 avfilter_inout_free(&inputs);
1069 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1070 configure_output_filter(fg, fg->outputs[i], cur);
1071 avfilter_inout_free(&outputs);
1073 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1076 fg->reconfiguration = 1;
1078 for (i = 0; i < fg->nb_outputs; i++) {
1079 OutputStream *ost = fg->outputs[i]->ost;
1081 /* identical to the same check in ffmpeg.c, needed because
1082 complex filter graphs are initialized earlier */
1083 av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1084 avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1085 return AVERROR(EINVAL);
1087 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1088 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1089 av_buffersink_set_frame_size(ost->filter->filter,
1090 ost->enc_ctx->frame_size);
1096 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1099 for (i = 0; i < fg->nb_inputs; i++)
1100 if (fg->inputs[i]->ist == ist)
1105 int filtergraph_is_simple(FilterGraph *fg)
1107 return !fg->graph_desc;