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 int filter_nbthreads = -1;
43 int filter_complex_nbthreads = -1;
45 static const enum AVPixelFormat *get_compliance_unofficial_pix_fmts(enum AVCodecID codec_id, const enum AVPixelFormat default_formats[])
47 static const enum AVPixelFormat mjpeg_formats[] =
48 { AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
49 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
51 static const enum AVPixelFormat ljpeg_formats[] =
52 { AV_PIX_FMT_BGR24 , AV_PIX_FMT_BGRA , AV_PIX_FMT_BGR0,
53 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
54 AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
57 if (codec_id == AV_CODEC_ID_MJPEG) {
59 } else if (codec_id == AV_CODEC_ID_LJPEG) {
62 return default_formats;
66 enum AVPixelFormat choose_pixel_fmt(AVStream *st, AVCodecContext *enc_ctx, AVCodec *codec, enum AVPixelFormat target)
68 if (codec && codec->pix_fmts) {
69 const enum AVPixelFormat *p = codec->pix_fmts;
70 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
71 int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
72 enum AVPixelFormat best= AV_PIX_FMT_NONE;
74 if (enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
75 p = get_compliance_unofficial_pix_fmts(enc_ctx->codec_id, p);
77 for (; *p != AV_PIX_FMT_NONE; p++) {
78 best= avcodec_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
82 if (*p == AV_PIX_FMT_NONE) {
83 if (target != AV_PIX_FMT_NONE)
84 av_log(NULL, AV_LOG_WARNING,
85 "Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
86 av_get_pix_fmt_name(target),
88 av_get_pix_fmt_name(best));
95 void choose_sample_fmt(AVStream *st, AVCodec *codec)
97 if (codec && codec->sample_fmts) {
98 const enum AVSampleFormat *p = codec->sample_fmts;
99 for (; *p != -1; p++) {
100 if (*p == st->codecpar->format)
104 if((codec->capabilities & AV_CODEC_CAP_LOSSLESS) && av_get_sample_fmt_name(st->codecpar->format) > av_get_sample_fmt_name(codec->sample_fmts[0]))
105 av_log(NULL, AV_LOG_ERROR, "Conversion will not be lossless.\n");
106 if(av_get_sample_fmt_name(st->codecpar->format))
107 av_log(NULL, AV_LOG_WARNING,
108 "Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
109 av_get_sample_fmt_name(st->codecpar->format),
111 av_get_sample_fmt_name(codec->sample_fmts[0]));
112 st->codecpar->format = codec->sample_fmts[0];
117 static char *choose_pix_fmts(OutputFilter *ofilter)
119 OutputStream *ost = ofilter->ost;
120 AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
122 // used by choose_pixel_fmt() and below
123 av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
125 if (ost->keep_pix_fmt) {
126 avfilter_graph_set_auto_convert(ofilter->graph->graph,
127 AVFILTER_AUTO_CONVERT_NONE);
128 if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
130 return av_strdup(av_get_pix_fmt_name(ost->enc_ctx->pix_fmt));
132 if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
133 return av_strdup(av_get_pix_fmt_name(choose_pixel_fmt(ost->st, ost->enc_ctx, ost->enc, ost->enc_ctx->pix_fmt)));
134 } else if (ost->enc && ost->enc->pix_fmts) {
135 const enum AVPixelFormat *p;
136 AVIOContext *s = NULL;
140 if (avio_open_dyn_buf(&s) < 0)
143 p = ost->enc->pix_fmts;
144 if (ost->enc_ctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
145 p = get_compliance_unofficial_pix_fmts(ost->enc_ctx->codec_id, p);
148 for (; *p != AV_PIX_FMT_NONE; p++) {
149 const char *name = av_get_pix_fmt_name(*p);
150 avio_printf(s, "%s|", name);
152 len = avio_close_dyn_buf(s, &ret);
159 /* Define a function for building a string containing a list of
160 * allowed formats. */
161 #define DEF_CHOOSE_FORMAT(suffix, type, var, supported_list, none, get_name) \
162 static char *choose_ ## suffix (OutputFilter *ofilter) \
164 if (ofilter->var != none) { \
165 get_name(ofilter->var); \
166 return av_strdup(name); \
167 } else if (ofilter->supported_list) { \
169 AVIOContext *s = NULL; \
173 if (avio_open_dyn_buf(&s) < 0) \
176 for (p = ofilter->supported_list; *p != none; p++) { \
178 avio_printf(s, "%s|", name); \
180 len = avio_close_dyn_buf(s, &ret); \
187 //DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
190 DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
191 AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME)
193 DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
194 GET_SAMPLE_RATE_NAME)
196 DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
199 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
201 FilterGraph *fg = av_mallocz(sizeof(*fg));
205 fg->index = nb_filtergraphs;
207 GROW_ARRAY(fg->outputs, fg->nb_outputs);
208 if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
210 fg->outputs[0]->ost = ost;
211 fg->outputs[0]->graph = fg;
212 fg->outputs[0]->format = -1;
214 ost->filter = fg->outputs[0];
216 GROW_ARRAY(fg->inputs, fg->nb_inputs);
217 if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
219 fg->inputs[0]->ist = ist;
220 fg->inputs[0]->graph = fg;
221 fg->inputs[0]->format = -1;
223 GROW_ARRAY(ist->filters, ist->nb_filters);
224 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
226 GROW_ARRAY(filtergraphs, nb_filtergraphs);
227 filtergraphs[nb_filtergraphs - 1] = fg;
232 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
234 InputStream *ist = NULL;
235 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
238 // TODO: support other filter types
239 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
240 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
249 int file_idx = strtol(in->name, &p, 0);
251 if (file_idx < 0 || file_idx >= nb_input_files) {
252 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
253 file_idx, fg->graph_desc);
256 s = input_files[file_idx]->ctx;
258 for (i = 0; i < s->nb_streams; i++) {
259 enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
260 if (stream_type != type &&
261 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
262 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
264 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
270 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
271 "matches no streams.\n", p, fg->graph_desc);
274 ist = input_streams[input_files[file_idx]->ist_index + st->index];
276 /* find the first unused stream of corresponding type */
277 for (i = 0; i < nb_input_streams; i++) {
278 ist = input_streams[i];
279 if (ist->dec_ctx->codec_type == type && ist->discard)
282 if (i == nb_input_streams) {
283 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
284 "unlabeled input pad %d on filter %s\n", in->pad_idx,
285 in->filter_ctx->name);
292 ist->decoding_needed |= DECODING_FOR_FILTER;
293 ist->st->discard = AVDISCARD_NONE;
295 GROW_ARRAY(fg->inputs, fg->nb_inputs);
296 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
298 fg->inputs[fg->nb_inputs - 1]->ist = ist;
299 fg->inputs[fg->nb_inputs - 1]->graph = fg;
300 fg->inputs[fg->nb_inputs - 1]->format = -1;
302 GROW_ARRAY(ist->filters, ist->nb_filters);
303 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
306 int init_complex_filtergraph(FilterGraph *fg)
308 AVFilterInOut *inputs, *outputs, *cur;
309 AVFilterGraph *graph;
312 /* this graph is only used for determining the kinds of inputs
313 * and outputs we have, and is discarded on exit from this function */
314 graph = avfilter_graph_alloc();
316 return AVERROR(ENOMEM);
318 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
322 for (cur = inputs; cur; cur = cur->next)
323 init_input_filter(fg, cur);
325 for (cur = outputs; cur;) {
326 GROW_ARRAY(fg->outputs, fg->nb_outputs);
327 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
328 if (!fg->outputs[fg->nb_outputs - 1])
331 fg->outputs[fg->nb_outputs - 1]->graph = fg;
332 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
333 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
336 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
340 avfilter_inout_free(&inputs);
341 avfilter_graph_free(&graph);
345 static int insert_trim(int64_t start_time, int64_t duration,
346 AVFilterContext **last_filter, int *pad_idx,
347 const char *filter_name)
349 AVFilterGraph *graph = (*last_filter)->graph;
350 AVFilterContext *ctx;
351 const AVFilter *trim;
352 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
353 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
356 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
359 trim = avfilter_get_by_name(name);
361 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
362 "recording time.\n", name);
363 return AVERROR_FILTER_NOT_FOUND;
366 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
368 return AVERROR(ENOMEM);
370 if (duration != INT64_MAX) {
371 ret = av_opt_set_int(ctx, "durationi", duration,
372 AV_OPT_SEARCH_CHILDREN);
374 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
375 ret = av_opt_set_int(ctx, "starti", start_time,
376 AV_OPT_SEARCH_CHILDREN);
379 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
383 ret = avfilter_init_str(ctx, NULL);
387 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
396 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
397 const char *filter_name, const char *args)
399 AVFilterGraph *graph = (*last_filter)->graph;
400 AVFilterContext *ctx;
403 ret = avfilter_graph_create_filter(&ctx,
404 avfilter_get_by_name(filter_name),
405 filter_name, args, NULL, graph);
409 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
418 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
421 OutputStream *ost = ofilter->ost;
422 OutputFile *of = output_files[ost->file_index];
423 AVFilterContext *last_filter = out->filter_ctx;
424 int pad_idx = out->pad_idx;
428 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
429 ret = avfilter_graph_create_filter(&ofilter->filter,
430 avfilter_get_by_name("buffersink"),
431 name, NULL, NULL, fg->graph);
436 if (!hw_device_ctx && (ofilter->width || ofilter->height)) {
438 AVFilterContext *filter;
439 AVDictionaryEntry *e = NULL;
441 snprintf(args, sizeof(args), "%d:%d",
442 ofilter->width, ofilter->height);
444 while ((e = av_dict_get(ost->sws_dict, "", e,
445 AV_DICT_IGNORE_SUFFIX))) {
446 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
449 snprintf(name, sizeof(name), "scaler for output stream %d:%d",
450 ost->file_index, ost->index);
451 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
452 name, args, NULL, fg->graph)) < 0)
454 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
457 last_filter = filter;
461 if ((pix_fmts = choose_pix_fmts(ofilter))) {
462 AVFilterContext *filter;
463 snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
464 ost->file_index, ost->index);
465 ret = avfilter_graph_create_filter(&filter,
466 avfilter_get_by_name("format"),
467 "format", pix_fmts, NULL, fg->graph);
471 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
474 last_filter = filter;
478 if (ost->frame_rate.num && 0) {
479 AVFilterContext *fps;
482 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
483 ost->frame_rate.den);
484 snprintf(name, sizeof(name), "fps for output stream %d:%d",
485 ost->file_index, ost->index);
486 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
487 name, args, NULL, fg->graph);
491 ret = avfilter_link(last_filter, pad_idx, fps, 0);
498 snprintf(name, sizeof(name), "trim for output stream %d:%d",
499 ost->file_index, ost->index);
500 ret = insert_trim(of->start_time, of->recording_time,
501 &last_filter, &pad_idx, name);
506 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
512 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
514 OutputStream *ost = ofilter->ost;
515 OutputFile *of = output_files[ost->file_index];
516 AVCodecContext *codec = ost->enc_ctx;
517 AVFilterContext *last_filter = out->filter_ctx;
518 int pad_idx = out->pad_idx;
519 char *sample_fmts, *sample_rates, *channel_layouts;
523 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
524 ret = avfilter_graph_create_filter(&ofilter->filter,
525 avfilter_get_by_name("abuffersink"),
526 name, NULL, NULL, fg->graph);
529 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
532 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
533 AVFilterContext *filt_ctx; \
535 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
536 "similarly to -af " filter_name "=%s.\n", arg); \
538 ret = avfilter_graph_create_filter(&filt_ctx, \
539 avfilter_get_by_name(filter_name), \
540 filter_name, arg, NULL, fg->graph); \
544 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
548 last_filter = filt_ctx; \
551 if (ost->audio_channels_mapped) {
554 av_bprint_init(&pan_buf, 256, 8192);
555 av_bprintf(&pan_buf, "0x%"PRIx64,
556 av_get_default_channel_layout(ost->audio_channels_mapped));
557 for (i = 0; i < ost->audio_channels_mapped; i++)
558 if (ost->audio_channels_map[i] != -1)
559 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
561 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
562 av_bprint_finalize(&pan_buf, NULL);
565 if (codec->channels && !codec->channel_layout)
566 codec->channel_layout = av_get_default_channel_layout(codec->channels);
568 sample_fmts = choose_sample_fmts(ofilter);
569 sample_rates = choose_sample_rates(ofilter);
570 channel_layouts = choose_channel_layouts(ofilter);
571 if (sample_fmts || sample_rates || channel_layouts) {
572 AVFilterContext *format;
577 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
580 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
583 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
586 av_freep(&sample_fmts);
587 av_freep(&sample_rates);
588 av_freep(&channel_layouts);
590 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
591 ost->file_index, ost->index);
592 ret = avfilter_graph_create_filter(&format,
593 avfilter_get_by_name("aformat"),
594 name, args, NULL, fg->graph);
598 ret = avfilter_link(last_filter, pad_idx, format, 0);
602 last_filter = format;
606 if (audio_volume != 256 && 0) {
609 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
610 AUTO_INSERT_FILTER("-vol", "volume", args);
613 if (ost->apad && of->shortest) {
617 for (i=0; i<of->ctx->nb_streams; i++)
618 if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
621 if (i<of->ctx->nb_streams) {
622 snprintf(args, sizeof(args), "%s", ost->apad);
623 AUTO_INSERT_FILTER("-apad", "apad", args);
627 snprintf(name, sizeof(name), "trim for output stream %d:%d",
628 ost->file_index, ost->index);
629 ret = insert_trim(of->start_time, of->recording_time,
630 &last_filter, &pad_idx, name);
634 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
640 #define DESCRIBE_FILTER_LINK(f, inout, in) \
642 AVFilterContext *ctx = inout->filter_ctx; \
643 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
644 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
647 if (avio_open_dyn_buf(&pb) < 0) \
650 avio_printf(pb, "%s", ctx->filter->name); \
652 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
654 avio_close_dyn_buf(pb, &f->name); \
657 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
659 av_freep(&ofilter->name);
660 DESCRIBE_FILTER_LINK(ofilter, out, 0);
663 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
667 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
668 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
669 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
670 default: av_assert0(0);
674 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
676 AVFormatContext *avf = input_files[ist->file_index]->ctx;
679 /* Compute the size of the canvas for the subtitles stream.
680 If the subtitles codecpar has set a size, use it. Otherwise use the
681 maximum dimensions of the video streams in the same file. */
685 for (i = 0; i < avf->nb_streams; i++) {
686 if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
687 w = FFMAX(w, avf->streams[i]->codecpar->width);
688 h = FFMAX(h, avf->streams[i]->codecpar->height);
695 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
697 ist->sub2video.w = ist->resample_width = ifilter->width = w;
698 ist->sub2video.h = ist->resample_height = ifilter->height = h;
700 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
701 palettes for all rectangles are identical or compatible */
702 ist->resample_pix_fmt = ifilter->format = AV_PIX_FMT_RGB32;
704 ist->sub2video.frame = av_frame_alloc();
705 if (!ist->sub2video.frame)
706 return AVERROR(ENOMEM);
707 ist->sub2video.last_pts = INT64_MIN;
711 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
714 AVFilterContext *last_filter;
715 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
716 InputStream *ist = ifilter->ist;
717 InputFile *f = input_files[ist->file_index];
718 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
720 AVRational fr = ist->framerate;
724 int ret, pad_idx = 0;
725 int64_t tsoffset = 0;
726 AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
729 return AVERROR(ENOMEM);
730 memset(par, 0, sizeof(*par));
731 par->format = AV_PIX_FMT_NONE;
733 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
734 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
735 ret = AVERROR(EINVAL);
740 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
742 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
743 ret = sub2video_prepare(ist, ifilter);
748 sar = ifilter->sample_aspect_ratio;
750 sar = (AVRational){0,1};
751 av_bprint_init(&args, 0, 1);
753 "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
754 "pixel_aspect=%d/%d:sws_param=flags=%d",
755 ifilter->width, ifilter->height, ifilter->format,
756 tb.num, tb.den, sar.num, sar.den,
757 SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
758 if (fr.num && fr.den)
759 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
760 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
761 ist->file_index, ist->st->index);
764 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
765 args.str, NULL, fg->graph)) < 0)
767 par->hw_frames_ctx = ifilter->hw_frames_ctx;
768 ret = av_buffersrc_parameters_set(ifilter->filter, par);
772 last_filter = ifilter->filter;
774 if (ist->autorotate) {
775 double theta = get_rotation(ist->st);
777 if (fabs(theta - 90) < 1.0) {
778 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
779 } else if (fabs(theta - 180) < 1.0) {
780 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
783 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
784 } else if (fabs(theta - 270) < 1.0) {
785 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
786 } else if (fabs(theta) > 1.0) {
788 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
789 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
795 if (ist->framerate.num) {
796 AVFilterContext *setpts;
798 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
799 ist->file_index, ist->st->index);
800 if ((ret = avfilter_graph_create_filter(&setpts,
801 avfilter_get_by_name("setpts"),
806 if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
809 last_filter = setpts;
812 if (do_deinterlace) {
813 AVFilterContext *yadif;
815 snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
816 ist->file_index, ist->st->index);
817 if ((ret = avfilter_graph_create_filter(&yadif,
818 avfilter_get_by_name("yadif"),
823 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
829 snprintf(name, sizeof(name), "trim for input stream %d:%d",
830 ist->file_index, ist->st->index);
832 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
833 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
834 tsoffset += f->ctx->start_time;
836 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
837 AV_NOPTS_VALUE : tsoffset, f->recording_time,
838 &last_filter, &pad_idx, name);
842 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
851 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
854 AVFilterContext *last_filter;
855 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
856 InputStream *ist = ifilter->ist;
857 InputFile *f = input_files[ist->file_index];
860 int ret, pad_idx = 0;
861 int64_t tsoffset = 0;
863 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
864 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
865 return AVERROR(EINVAL);
868 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
869 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
870 1, ifilter->sample_rate,
871 ifilter->sample_rate,
872 av_get_sample_fmt_name(ifilter->format));
873 if (ifilter->channel_layout)
874 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
875 ifilter->channel_layout);
877 av_bprintf(&args, ":channels=%d", ifilter->channels);
878 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
879 ist->file_index, ist->st->index);
881 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
882 name, args.str, NULL,
885 last_filter = ifilter->filter;
887 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
888 AVFilterContext *filt_ctx; \
890 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
891 "similarly to -af " filter_name "=%s.\n", arg); \
893 snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
894 fg->index, filter_name, ist->file_index, ist->st->index); \
895 ret = avfilter_graph_create_filter(&filt_ctx, \
896 avfilter_get_by_name(filter_name), \
897 name, arg, NULL, fg->graph); \
901 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
905 last_filter = filt_ctx; \
908 if (audio_sync_method > 0) {
909 char args[256] = {0};
911 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
912 if (audio_drift_threshold != 0.1)
913 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
914 if (!fg->reconfiguration)
915 av_strlcatf(args, sizeof(args), ":first_pts=0");
916 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
919 // if (ost->audio_channels_mapped) {
922 // av_bprint_init(&pan_buf, 256, 8192);
923 // av_bprintf(&pan_buf, "0x%"PRIx64,
924 // av_get_default_channel_layout(ost->audio_channels_mapped));
925 // for (i = 0; i < ost->audio_channels_mapped; i++)
926 // if (ost->audio_channels_map[i] != -1)
927 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
928 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
929 // av_bprint_finalize(&pan_buf, NULL);
932 if (audio_volume != 256) {
935 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
936 "audio filter instead.\n");
938 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
939 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
942 snprintf(name, sizeof(name), "trim for input stream %d:%d",
943 ist->file_index, ist->st->index);
945 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
946 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
947 tsoffset += f->ctx->start_time;
949 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
950 AV_NOPTS_VALUE : tsoffset, f->recording_time,
951 &last_filter, &pad_idx, name);
955 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
961 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
964 av_freep(&ifilter->name);
965 DESCRIBE_FILTER_LINK(ifilter, in, 1);
967 if (!ifilter->ist->dec) {
968 av_log(NULL, AV_LOG_ERROR,
969 "No decoder for stream #%d:%d, filtering impossible\n",
970 ifilter->ist->file_index, ifilter->ist->st->index);
971 return AVERROR_DECODER_NOT_FOUND;
973 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
974 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
975 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
976 default: av_assert0(0);
980 int configure_filtergraph(FilterGraph *fg)
982 AVFilterInOut *inputs, *outputs, *cur;
983 int ret, i, simple = filtergraph_is_simple(fg);
984 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
987 avfilter_graph_free(&fg->graph);
988 if (!(fg->graph = avfilter_graph_alloc()))
989 return AVERROR(ENOMEM);
992 OutputStream *ost = fg->outputs[0]->ost;
994 AVDictionaryEntry *e = NULL;
996 fg->graph->nb_threads = filter_complex_nbthreads;
999 while ((e = av_dict_get(ost->sws_dict, "", e,
1000 AV_DICT_IGNORE_SUFFIX))) {
1001 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1004 args[strlen(args)-1] = 0;
1005 fg->graph->scale_sws_opts = av_strdup(args);
1008 while ((e = av_dict_get(ost->swr_opts, "", e,
1009 AV_DICT_IGNORE_SUFFIX))) {
1010 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1013 args[strlen(args)-1] = 0;
1014 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1017 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1018 AV_DICT_IGNORE_SUFFIX))) {
1019 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1022 args[strlen(args) - 1] = '\0';
1023 fg->graph->resample_lavr_opts = av_strdup(args);
1025 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1027 av_opt_set(fg->graph, "threads", e->value, 0);
1029 fg->graph->nb_threads = filter_nbthreads;
1032 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1035 if (hw_device_ctx) {
1036 for (i = 0; i < fg->graph->nb_filters; i++) {
1037 fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(hw_device_ctx);
1041 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1042 const char *num_inputs;
1043 const char *num_outputs;
1046 } else if (outputs->next) {
1053 } else if (inputs->next) {
1058 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1059 "to have exactly 1 input and 1 output."
1060 " However, it had %s input(s) and %s output(s)."
1061 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1062 graph_desc, num_inputs, num_outputs);
1063 return AVERROR(EINVAL);
1066 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1067 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1068 avfilter_inout_free(&inputs);
1069 avfilter_inout_free(&outputs);
1072 avfilter_inout_free(&inputs);
1074 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1075 configure_output_filter(fg, fg->outputs[i], cur);
1076 avfilter_inout_free(&outputs);
1078 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1081 /* limit the lists of allowed formats to the ones selected, to
1082 * make sure they stay the same if the filtergraph is reconfigured later */
1083 for (i = 0; i < fg->nb_outputs; i++) {
1084 OutputFilter *ofilter = fg->outputs[i];
1085 AVFilterLink *link = ofilter->filter->inputs[0];
1087 ofilter->format = link->format;
1089 ofilter->width = link->w;
1090 ofilter->height = link->h;
1092 ofilter->sample_rate = link->sample_rate;
1093 ofilter->channel_layout = link->channel_layout;
1096 fg->reconfiguration = 1;
1098 for (i = 0; i < fg->nb_outputs; i++) {
1099 OutputStream *ost = fg->outputs[i]->ost;
1101 /* identical to the same check in ffmpeg.c, needed because
1102 complex filter graphs are initialized earlier */
1103 av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1104 avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1105 return AVERROR(EINVAL);
1107 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1108 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1109 av_buffersink_set_frame_size(ost->filter->filter,
1110 ost->enc_ctx->frame_size);
1116 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1118 av_buffer_unref(&ifilter->hw_frames_ctx);
1120 ifilter->format = frame->format;
1122 ifilter->width = frame->width;
1123 ifilter->height = frame->height;
1124 ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1126 ifilter->sample_rate = frame->sample_rate;
1127 ifilter->channels = av_frame_get_channels(frame);
1128 ifilter->channel_layout = frame->channel_layout;
1130 if (frame->hw_frames_ctx) {
1131 ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1132 if (!ifilter->hw_frames_ctx)
1133 return AVERROR(ENOMEM);
1139 int ifilter_parameters_from_decoder(InputFilter *ifilter, const AVCodecContext *avctx)
1141 av_buffer_unref(&ifilter->hw_frames_ctx);
1143 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO)
1144 ifilter->format = avctx->pix_fmt;
1146 ifilter->format = avctx->sample_fmt;
1148 ifilter->width = avctx->width;
1149 ifilter->height = avctx->height;
1150 if (ifilter->ist && ifilter->ist->st && ifilter->ist->st->sample_aspect_ratio.num)
1151 ifilter->sample_aspect_ratio = ifilter->ist->st->sample_aspect_ratio;
1153 ifilter->sample_aspect_ratio = avctx->sample_aspect_ratio;
1155 ifilter->sample_rate = avctx->sample_rate;
1156 ifilter->channels = avctx->channels;
1157 ifilter->channel_layout = avctx->channel_layout;
1159 if (ifilter->ist && ifilter->ist->hw_frames_ctx) {
1160 ifilter->format = ifilter->ist->resample_pix_fmt;
1161 ifilter->hw_frames_ctx = av_buffer_ref(ifilter->ist->hw_frames_ctx);
1162 if (!ifilter->hw_frames_ctx)
1163 return AVERROR(ENOMEM);
1169 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1172 for (i = 0; i < fg->nb_inputs; i++)
1173 if (fg->inputs[i]->ist == ist)
1178 int filtergraph_is_simple(FilterGraph *fg)
1180 return !fg->graph_desc;