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"
28 #include "libavresample/avresample.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/bprint.h"
33 #include "libavutil/channel_layout.h"
34 #include "libavutil/display.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/pixdesc.h"
37 #include "libavutil/pixfmt.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/samplefmt.h"
41 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
43 if (codec && codec->pix_fmts) {
44 const enum AVPixelFormat *p = codec->pix_fmts;
45 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
46 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
47 enum AVPixelFormat best= AV_PIX_FMT_NONE;
48 static const enum AVPixelFormat mjpeg_formats[] =
49 { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
50 static const enum AVPixelFormat ljpeg_formats[] =
51 { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
52 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
54 if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
55 if (enc_ctx->codec_id == AV_CODEC_ID_MJPEG) {
57 } else if (enc_ctx->codec_id == AV_CODEC_ID_LJPEG) {
61 for (; *p != AV_PIX_FMT_NONE; p++) {
62 best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
66 if (*p == AV_PIX_FMT_NONE) {
67 if (target != AV_PIX_FMT_NONE)
68 av_log(NULL, AV_LOG_WARNING,
69 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
70 av_get_pix_fmt_name(target),
72 av_get_pix_fmt_name(best));
79 void choose_sample_fmt(AVStream *st, AVCodec *codec)
81 if (codec && codec->sample_fmts) {
82 const enum AVSampleFormat *p = codec->sample_fmts;
83 for (; *p != -1; p++) {
84 if (*p == st->codec->sample_fmt)
88 if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codec->sample_fmt) > av_get_sample_fmt_name(codec->sample_fmts[0]))
89 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
90 if(av_get_sample_fmt_name(st->codec->sample_fmt))
91 av_log(NULL, AV_LOG_WARNING,
92 "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
93 av_get_sample_fmt_name(st->codec->sample_fmt),
95 av_get_sample_fmt_name(codec->sample_fmts[0]));
96 st->codec->sample_fmt = codec->sample_fmts[0];
101 static char *choose_pix_fmts(OutputStream *ost)
103 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
105 // used by choose_pixel_fmt() and below
106 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
108 if (ost->keep_pix_fmt) {
110 avfilter_graph_set_auto_convert(ost->filter->graph->graph,
111 AVFILTER_AUTO_CONVERT_NONE);
112 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
114 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
116 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
117 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
118 } else if (ost->enc && ost->enc->pix_fmts) {
119 const enum AVPixelFormat *p;
120 AVIOContext *s = NULL;
124 if (avio_open_dyn_buf(&s) < 0)
127 p = ost->enc->pix_fmts;
128 if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
129 if (ost->enc_ctx->codec_id == AV_CODEC_ID_MJPEG) {
130 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE };
131 } else if (ost->enc_ctx->codec_id == AV_CODEC_ID_LJPEG) {
132 p = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUV420P,
133 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
137 for (; *p != AV_PIX_FMT_NONE; p++) {
138 const char *name = av_get_pix_fmt_name(*p);
139 avio_printf(s, "%s|", name);
141 len = avio_close_dyn_buf(s, &ret);
148 /* Define a function for building a string containing a list of
149 * allowed formats. */
150 #define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name) \
151 static char *choose_ ## var ## s(OutputStream *ost) \
153 if (ost->enc_ctx->var != none) { \
154 get_name(ost->enc_ctx->var); \
155 return av_strdup(name); \
156 } else if (ost->enc && ost->enc->supported_list) { \
158 AVIOContext *s = NULL; \
162 if (avio_open_dyn_buf(&s) < 0) \
165 for (p = ost->enc->supported_list; *p != none; p++) { \
167 avio_printf(s, "%s|", name); \
169 len = avio_close_dyn_buf(s, &ret); \
176 // DEF_CHOOSE_FORMAT(enum AVPixelFormat, pix_fmt, pix_fmts, AV_PIX_FMT_NONE,
179 DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
180 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
182 DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
183 GET_SAMPLE_RATE_NAME)
185 DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
188 FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
190 FilterGraph *fg = av_mallocz(sizeof(*fg));
194 fg->index = nb_filtergraphs;
196 GROW_ARRAY(fg->outputs, fg->nb_outputs);
197 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
199 fg->outputs[0]->ost = ost;
200 fg->outputs[0]->graph = fg;
202 ost->filter = fg->outputs[0];
204 GROW_ARRAY(fg->inputs, fg->nb_inputs);
205 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
207 fg->inputs[0]->ist = ist;
208 fg->inputs[0]->graph = fg;
210 GROW_ARRAY(ist->filters, ist->nb_filters);
211 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
213 GROW_ARRAY(filtergraphs, nb_filtergraphs);
214 filtergraphs[nb_filtergraphs - 1] = fg;
219 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
221 InputStream *ist = NULL;
222 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
225 // TODO: support other filter types
226 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
227 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
236 int file_idx = strtol(in->name, &p, 0);
238 if (file_idx < 0 || file_idx >= nb_input_files) {
239 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
240 file_idx, fg->graph_desc);
243 s = input_files[file_idx]->ctx;
245 for (i = 0; i < s->nb_streams; i++) {
246 enum AVMediaType stream_type = s->streams[i]->codec->codec_type;
247 if (stream_type != type &&
248 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
249 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
251 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
257 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
258 "matches no streams.\n", p, fg->graph_desc);
261 ist = input_streams[input_files[file_idx]->ist_index + st->index];
263 /* find the first unused stream of corresponding type */
264 for (i = 0; i < nb_input_streams; i++) {
265 ist = input_streams[i];
266 if (ist->dec_ctx->codec_type == type && ist->discard)
269 if (i == nb_input_streams) {
270 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
271 "unlabeled input pad %d on filter %s\n", in->pad_idx,
272 in->filter_ctx->name);
279 ist->decoding_needed |= DECODING_FOR_FILTER;
280 ist->st->discard = AVDISCARD_NONE;
282 GROW_ARRAY(fg->inputs, fg->nb_inputs);
283 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
285 fg->inputs[fg->nb_inputs - 1]->ist = ist;
286 fg->inputs[fg->nb_inputs - 1]->graph = fg;
288 GROW_ARRAY(ist->filters, ist->nb_filters);
289 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
292 int init_complex_filtergraph(FilterGraph *fg)
294 AVFilterInOut *inputs, *outputs, *cur;
295 AVFilterGraph *graph;
298 /* this graph is only used for determining the kinds of inputs
299 * and outputs we have, and is discarded on exit from this function */
300 graph = avfilter_graph_alloc();
302 return AVERROR(ENOMEM);
304 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
308 for (cur = inputs; cur; cur = cur->next)
309 init_input_filter(fg, cur);
311 for (cur = outputs; cur;) {
312 GROW_ARRAY(fg->outputs, fg->nb_outputs);
313 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
314 if (!fg->outputs[fg->nb_outputs - 1])
317 fg->outputs[fg->nb_outputs - 1]->graph = fg;
318 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
319 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
322 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
326 avfilter_inout_free(&inputs);
327 avfilter_graph_free(&graph);
331 static int insert_trim(int64_t start_time, int64_t duration,
332 AVFilterContext **last_filter, int *pad_idx,
333 const char *filter_name)
335 AVFilterGraph *graph = (*last_filter)->graph;
336 AVFilterContext *ctx;
337 const AVFilter *trim;
338 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
339 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
342 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
345 trim = avfilter_get_by_name(name);
347 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
348 "recording time.\n", name);
349 return AVERROR_FILTER_NOT_FOUND;
352 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
354 return AVERROR(ENOMEM);
356 if (duration != INT64_MAX) {
357 ret = av_opt_set_int(ctx, "durationi", duration,
358 AV_OPT_SEARCH_CHILDREN);
360 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
361 ret = av_opt_set_int(ctx, "starti", start_time,
362 AV_OPT_SEARCH_CHILDREN);
365 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
369 ret = avfilter_init_str(ctx, NULL);
373 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
382 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
383 const char *filter_name, const char *args)
385 AVFilterGraph *graph = (*last_filter)->graph;
386 AVFilterContext *ctx;
389 ret = avfilter_graph_create_filter(&ctx,
390 avfilter_get_by_name(filter_name),
391 filter_name, args, NULL, graph);
395 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
404 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
407 OutputStream *ost = ofilter->ost;
408 OutputFile *of = output_files[ost->file_index];
409 AVCodecContext *codec = ost->enc_ctx;
410 AVFilterContext *last_filter = out->filter_ctx;
411 int pad_idx = out->pad_idx;
415 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
416 ret = avfilter_graph_create_filter(&ofilter->filter,
417 avfilter_get_by_name("buffersink"),
418 name, NULL, NULL, fg->graph);
423 if (codec->width || codec->height) {
425 AVFilterContext *filter;
426 AVDictionaryEntry *e = NULL;
428 snprintf(args, sizeof(args), "%d:%d",
432 while ((e = av_dict_get(ost->sws_dict, "", e,
433 AV_DICT_IGNORE_SUFFIX))) {
434 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
437 snprintf(name, sizeof(name), "scaler for output stream %d:%d",
438 ost->file_index, ost->index);
439 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
440 name, args, NULL, fg->graph)) < 0)
442 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
445 last_filter = filter;
449 if ((pix_fmts = choose_pix_fmts(ost))) {
450 AVFilterContext *filter;
451 snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
452 ost->file_index, ost->index);
453 ret = avfilter_graph_create_filter(&filter,
454 avfilter_get_by_name("format"),
455 "format", pix_fmts, NULL, fg->graph);
459 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
462 last_filter = filter;
466 if (ost->frame_rate.num && 0) {
467 AVFilterContext *fps;
470 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
471 ost->frame_rate.den);
472 snprintf(name, sizeof(name), "fps for output stream %d:%d",
473 ost->file_index, ost->index);
474 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
475 name, args, NULL, fg->graph);
479 ret = avfilter_link(last_filter, pad_idx, fps, 0);
486 snprintf(name, sizeof(name), "trim for output stream %d:%d",
487 ost->file_index, ost->index);
488 ret = insert_trim(of->start_time, of->recording_time,
489 &last_filter, &pad_idx, name);
494 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
500 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
502 OutputStream *ost = ofilter->ost;
503 OutputFile *of = output_files[ost->file_index];
504 AVCodecContext *codec = ost->enc_ctx;
505 AVFilterContext *last_filter = out->filter_ctx;
506 int pad_idx = out->pad_idx;
507 char *sample_fmts, *sample_rates, *channel_layouts;
511 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
512 ret = avfilter_graph_create_filter(&ofilter->filter,
513 avfilter_get_by_name("abuffersink"),
514 name, NULL, NULL, fg->graph);
517 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
520 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
521 AVFilterContext *filt_ctx; \
523 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
524 "similarly to -af " filter_name "=%s.\n", arg); \
526 ret = avfilter_graph_create_filter(&filt_ctx, \
527 avfilter_get_by_name(filter_name), \
528 filter_name, arg, NULL, fg->graph); \
532 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
536 last_filter = filt_ctx; \
539 if (ost->audio_channels_mapped) {
542 av_bprint_init(&pan_buf, 256, 8192);
543 av_bprintf(&pan_buf, "0x%"PRIx64,
544 av_get_default_channel_layout(ost->audio_channels_mapped));
545 for (i = 0; i < ost->audio_channels_mapped; i++)
546 if (ost->audio_channels_map[i] != -1)
547 av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
549 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
550 av_bprint_finalize(&pan_buf, NULL);
553 if (codec->channels && !codec->channel_layout)
554 codec->channel_layout = av_get_default_channel_layout(codec->channels);
556 sample_fmts = choose_sample_fmts(ost);
557 sample_rates = choose_sample_rates(ost);
558 channel_layouts = choose_channel_layouts(ost);
559 if (sample_fmts || sample_rates || channel_layouts) {
560 AVFilterContext *format;
565 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
568 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
571 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
574 av_freep(&sample_fmts);
575 av_freep(&sample_rates);
576 av_freep(&channel_layouts);
578 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
579 ost->file_index, ost->index);
580 ret = avfilter_graph_create_filter(&format,
581 avfilter_get_by_name("aformat"),
582 name, args, NULL, fg->graph);
586 ret = avfilter_link(last_filter, pad_idx, format, 0);
590 last_filter = format;
594 if (audio_volume != 256 && 0) {
597 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
598 AUTO_INSERT_FILTER("-vol", "volume", args);
601 if (ost->apad && of->shortest) {
605 for (i=0; i<of->ctx->nb_streams; i++)
606 if (of->ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
609 if (i<of->ctx->nb_streams) {
610 snprintf(args, sizeof(args), "%s", ost->apad);
611 AUTO_INSERT_FILTER("-apad", "apad", args);
615 snprintf(name, sizeof(name), "trim for output stream %d:%d",
616 ost->file_index, ost->index);
617 ret = insert_trim(of->start_time, of->recording_time,
618 &last_filter, &pad_idx, name);
622 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
628 #define DESCRIBE_FILTER_LINK(f, inout, in) \
630 AVFilterContext *ctx = inout->filter_ctx; \
631 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
632 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
635 if (avio_open_dyn_buf(&pb) < 0) \
638 avio_printf(pb, "%s", ctx->filter->name); \
640 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
642 avio_close_dyn_buf(pb, &f->name); \
645 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
647 av_freep(&ofilter->name);
648 DESCRIBE_FILTER_LINK(ofilter, out, 0);
651 av_log(NULL, AV_LOG_FATAL, "Filter %s has a unconnected output\n", ofilter->name);
655 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
656 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
657 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
658 default: av_assert0(0);
662 static int sub2video_prepare(InputStream *ist)
664 AVFormatContext *avf = input_files[ist->file_index]->ctx;
667 /* Compute the size of the canvas for the subtitles stream.
668 If the subtitles codec has set a size, use it. Otherwise use the
669 maximum dimensions of the video streams in the same file. */
670 w = ist->dec_ctx->width;
671 h = ist->dec_ctx->height;
673 for (i = 0; i < avf->nb_streams; i++) {
674 if (avf->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
675 w = FFMAX(w, avf->streams[i]->codec->width);
676 h = FFMAX(h, avf->streams[i]->codec->height);
683 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
685 ist->sub2video.w = ist->resample_width = w;
686 ist->sub2video.h = ist->resample_height = h;
688 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
689 palettes for all rectangles are identical or compatible */
690 ist->resample_pix_fmt = ist->dec_ctx->pix_fmt = AV_PIX_FMT_RGB32;
692 ist->sub2video.frame = av_frame_alloc();
693 if (!ist->sub2video.frame)
694 return AVERROR(ENOMEM);
695 ist->sub2video.last_pts = INT64_MIN;
699 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
702 AVFilterContext *last_filter;
703 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
704 InputStream *ist = ifilter->ist;
705 InputFile *f = input_files[ist->file_index];
706 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
708 AVRational fr = ist->framerate;
712 int ret, pad_idx = 0;
713 int64_t tsoffset = 0;
715 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
716 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
717 return AVERROR(EINVAL);
721 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
723 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
724 ret = sub2video_prepare(ist);
729 sar = ist->st->sample_aspect_ratio.num ?
730 ist->st->sample_aspect_ratio :
731 ist->dec_ctx->sample_aspect_ratio;
733 sar = (AVRational){0,1};
734 av_bprint_init(&args, 0, 1);
736 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
737 "pixel_aspect=%d/%d:sws_param=flags=%d", ist->resample_width,
738 ist->resample_height,
739 ist->hwaccel_retrieve_data ? ist->hwaccel_retrieved_pix_fmt : ist->resample_pix_fmt,
740 tb.num, tb.den, sar.num, sar.den,
741 SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
742 if (fr.num && fr.den)
743 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
744 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
745 ist->file_index, ist->st->index);
747 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
748 args.str, NULL, fg->graph)) < 0)
750 last_filter = ifilter->filter;
752 if (ist->autorotate) {
753 double theta = get_rotation(ist->st);
755 if (fabs(theta - 90) < 1.0) {
756 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
757 } else if (fabs(theta - 180) < 1.0) {
758 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
761 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
762 } else if (fabs(theta - 270) < 1.0) {
763 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
764 } else if (fabs(theta) > 1.0) {
766 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
767 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
773 if (ist->framerate.num) {
774 AVFilterContext *setpts;
776 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
777 ist->file_index, ist->st->index);
778 if ((ret = avfilter_graph_create_filter(&setpts,
779 avfilter_get_by_name("setpts"),
784 if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
787 last_filter = setpts;
790 if (do_deinterlace) {
791 AVFilterContext *yadif;
793 snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
794 ist->file_index, ist->st->index);
795 if ((ret = avfilter_graph_create_filter(&yadif,
796 avfilter_get_by_name("yadif"),
801 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
807 snprintf(name, sizeof(name), "trim for input stream %d:%d",
808 ist->file_index, ist->st->index);
810 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
811 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
812 tsoffset += f->ctx->start_time;
814 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
815 AV_NOPTS_VALUE : tsoffset, f->recording_time,
816 &last_filter, &pad_idx, name);
820 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
825 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
828 AVFilterContext *last_filter;
829 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
830 InputStream *ist = ifilter->ist;
831 InputFile *f = input_files[ist->file_index];
834 int ret, pad_idx = 0;
835 int64_t tsoffset = 0;
837 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
838 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
839 return AVERROR(EINVAL);
842 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
843 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
844 1, ist->dec_ctx->sample_rate,
845 ist->dec_ctx->sample_rate,
846 av_get_sample_fmt_name(ist->dec_ctx->sample_fmt));
847 if (ist->dec_ctx->channel_layout)
848 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
849 ist->dec_ctx->channel_layout);
851 av_bprintf(&args, ":channels=%d", ist->dec_ctx->channels);
852 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
853 ist->file_index, ist->st->index);
855 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
856 name, args.str, NULL,
859 last_filter = ifilter->filter;
861 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
862 AVFilterContext *filt_ctx; \
864 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
865 "similarly to -af " filter_name "=%s.\n", arg); \
867 snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
868 fg->index, filter_name, ist->file_index, ist->st->index); \
869 ret = avfilter_graph_create_filter(&filt_ctx, \
870 avfilter_get_by_name(filter_name), \
871 name, arg, NULL, fg->graph); \
875 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
879 last_filter = filt_ctx; \
882 if (audio_sync_method > 0) {
883 char args[256] = {0};
885 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
886 if (audio_drift_threshold != 0.1)
887 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
888 if (!fg->reconfiguration)
889 av_strlcatf(args, sizeof(args), ":first_pts=0");
890 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
893 // if (ost->audio_channels_mapped) {
896 // av_bprint_init(&pan_buf, 256, 8192);
897 // av_bprintf(&pan_buf, "0x%"PRIx64,
898 // av_get_default_channel_layout(ost->audio_channels_mapped));
899 // for (i = 0; i < ost->audio_channels_mapped; i++)
900 // if (ost->audio_channels_map[i] != -1)
901 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
902 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
903 // av_bprint_finalize(&pan_buf, NULL);
906 if (audio_volume != 256) {
909 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
910 "audio filter instead.\n");
912 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
913 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
916 snprintf(name, sizeof(name), "trim for input stream %d:%d",
917 ist->file_index, ist->st->index);
919 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
920 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
921 tsoffset += f->ctx->start_time;
923 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
924 AV_NOPTS_VALUE : tsoffset, f->recording_time,
925 &last_filter, &pad_idx, name);
929 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
935 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
938 av_freep(&ifilter->name);
939 DESCRIBE_FILTER_LINK(ifilter, in, 1);
941 if (!ifilter->ist->dec) {
942 av_log(NULL, AV_LOG_ERROR,
943 "No decoder for stream #%d:%d, filtering impossible\n",
944 ifilter->ist->file_index, ifilter->ist->st->index);
945 return AVERROR_DECODER_NOT_FOUND;
947 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
948 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
949 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
950 default: av_assert0(0);
954 int configure_filtergraph(FilterGraph *fg)
956 AVFilterInOut *inputs, *outputs, *cur;
957 int ret, i, simple = !fg->graph_desc;
958 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
961 avfilter_graph_free(&fg->graph);
962 if (!(fg->graph = avfilter_graph_alloc()))
963 return AVERROR(ENOMEM);
966 OutputStream *ost = fg->outputs[0]->ost;
968 AVDictionaryEntry *e = NULL;
971 while ((e = av_dict_get(ost->sws_dict, "", e,
972 AV_DICT_IGNORE_SUFFIX))) {
973 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
976 args[strlen(args)-1] = 0;
977 fg->graph->scale_sws_opts = av_strdup(args);
980 while ((e = av_dict_get(ost->swr_opts, "", e,
981 AV_DICT_IGNORE_SUFFIX))) {
982 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
985 args[strlen(args)-1] = 0;
986 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
989 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
990 AV_DICT_IGNORE_SUFFIX))) {
991 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
994 args[strlen(args) - 1] = '\0';
995 fg->graph->resample_lavr_opts = av_strdup(args);
997 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
999 av_opt_set(fg->graph, "threads", e->value, 0);
1002 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1005 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1006 const char *num_inputs;
1007 const char *num_outputs;
1010 } else if (outputs->next) {
1017 } else if (inputs->next) {
1022 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1023 "to have exactly 1 input and 1 output."
1024 " However, it had %s input(s) and %s output(s)."
1025 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1026 graph_desc, num_inputs, num_outputs);
1027 return AVERROR(EINVAL);
1030 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1031 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1032 avfilter_inout_free(&inputs);
1033 avfilter_inout_free(&outputs);
1036 avfilter_inout_free(&inputs);
1038 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1039 configure_output_filter(fg, fg->outputs[i], cur);
1040 avfilter_inout_free(&outputs);
1042 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1045 fg->reconfiguration = 1;
1047 for (i = 0; i < fg->nb_outputs; i++) {
1048 OutputStream *ost = fg->outputs[i]->ost;
1050 ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1051 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1052 av_buffersink_set_frame_size(ost->filter->filter,
1053 ost->enc_ctx->frame_size);
1059 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1062 for (i = 0; i < fg->nb_inputs; i++)
1063 if (fg->inputs[i]->ist == ist)