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;
217 fg->inputs[0]->format = -1;
219 GROW_ARRAY(ist->filters, ist->nb_filters);
220 ist->filters[ist->nb_filters - 1] = fg->inputs[0];
222 GROW_ARRAY(filtergraphs, nb_filtergraphs);
223 filtergraphs[nb_filtergraphs - 1] = fg;
228 static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
230 InputStream *ist = NULL;
231 enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
234 // TODO: support other filter types
235 if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
236 av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
245 int file_idx = strtol(in->name, &p, 0);
247 if (file_idx < 0 || file_idx >= nb_input_files) {
248 av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
249 file_idx, fg->graph_desc);
252 s = input_files[file_idx]->ctx;
254 for (i = 0; i < s->nb_streams; i++) {
255 enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
256 if (stream_type != type &&
257 !(stream_type == AVMEDIA_TYPE_SUBTITLE &&
258 type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
260 if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
266 av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
267 "matches no streams.\n", p, fg->graph_desc);
270 ist = input_streams[input_files[file_idx]->ist_index + st->index];
272 /* find the first unused stream of corresponding type */
273 for (i = 0; i < nb_input_streams; i++) {
274 ist = input_streams[i];
275 if (ist->dec_ctx->codec_type == type && ist->discard)
278 if (i == nb_input_streams) {
279 av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
280 "unlabeled input pad %d on filter %s\n", in->pad_idx,
281 in->filter_ctx->name);
288 ist->decoding_needed |= DECODING_FOR_FILTER;
289 ist->st->discard = AVDISCARD_NONE;
291 GROW_ARRAY(fg->inputs, fg->nb_inputs);
292 if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
294 fg->inputs[fg->nb_inputs - 1]->ist = ist;
295 fg->inputs[fg->nb_inputs - 1]->graph = fg;
296 fg->inputs[fg->nb_inputs - 1]->format = -1;
298 GROW_ARRAY(ist->filters, ist->nb_filters);
299 ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
302 int init_complex_filtergraph(FilterGraph *fg)
304 AVFilterInOut *inputs, *outputs, *cur;
305 AVFilterGraph *graph;
308 /* this graph is only used for determining the kinds of inputs
309 * and outputs we have, and is discarded on exit from this function */
310 graph = avfilter_graph_alloc();
312 return AVERROR(ENOMEM);
314 ret = avfilter_graph_parse2(graph, fg->graph_desc, &inputs, &outputs);
318 for (cur = inputs; cur; cur = cur->next)
319 init_input_filter(fg, cur);
321 for (cur = outputs; cur;) {
322 GROW_ARRAY(fg->outputs, fg->nb_outputs);
323 fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]));
324 if (!fg->outputs[fg->nb_outputs - 1])
327 fg->outputs[fg->nb_outputs - 1]->graph = fg;
328 fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
329 fg->outputs[fg->nb_outputs - 1]->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
332 fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
336 avfilter_inout_free(&inputs);
337 avfilter_graph_free(&graph);
341 static int insert_trim(int64_t start_time, int64_t duration,
342 AVFilterContext **last_filter, int *pad_idx,
343 const char *filter_name)
345 AVFilterGraph *graph = (*last_filter)->graph;
346 AVFilterContext *ctx;
347 const AVFilter *trim;
348 enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
349 const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
352 if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
355 trim = avfilter_get_by_name(name);
357 av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
358 "recording time.\n", name);
359 return AVERROR_FILTER_NOT_FOUND;
362 ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
364 return AVERROR(ENOMEM);
366 if (duration != INT64_MAX) {
367 ret = av_opt_set_int(ctx, "durationi", duration,
368 AV_OPT_SEARCH_CHILDREN);
370 if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
371 ret = av_opt_set_int(ctx, "starti", start_time,
372 AV_OPT_SEARCH_CHILDREN);
375 av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
379 ret = avfilter_init_str(ctx, NULL);
383 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
392 static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
393 const char *filter_name, const char *args)
395 AVFilterGraph *graph = (*last_filter)->graph;
396 AVFilterContext *ctx;
399 ret = avfilter_graph_create_filter(&ctx,
400 avfilter_get_by_name(filter_name),
401 filter_name, args, NULL, graph);
405 ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
414 static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
417 OutputStream *ost = ofilter->ost;
418 OutputFile *of = output_files[ost->file_index];
419 AVCodecContext *codec = ost->enc_ctx;
420 AVFilterContext *last_filter = out->filter_ctx;
421 int pad_idx = out->pad_idx;
425 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
426 ret = avfilter_graph_create_filter(&ofilter->filter,
427 avfilter_get_by_name("buffersink"),
428 name, NULL, NULL, fg->graph);
433 if (!hw_device_ctx && (codec->width || codec->height)) {
435 AVFilterContext *filter;
436 AVDictionaryEntry *e = NULL;
438 snprintf(args, sizeof(args), "%d:%d",
442 while ((e = av_dict_get(ost->sws_dict, "", e,
443 AV_DICT_IGNORE_SUFFIX))) {
444 av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
447 snprintf(name, sizeof(name), "scaler for output stream %d:%d",
448 ost->file_index, ost->index);
449 if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
450 name, args, NULL, fg->graph)) < 0)
452 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
455 last_filter = filter;
459 if ((pix_fmts = choose_pix_fmts(ost))) {
460 AVFilterContext *filter;
461 snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
462 ost->file_index, ost->index);
463 ret = avfilter_graph_create_filter(&filter,
464 avfilter_get_by_name("format"),
465 "format", pix_fmts, NULL, fg->graph);
469 if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
472 last_filter = filter;
476 if (ost->frame_rate.num && 0) {
477 AVFilterContext *fps;
480 snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
481 ost->frame_rate.den);
482 snprintf(name, sizeof(name), "fps for output stream %d:%d",
483 ost->file_index, ost->index);
484 ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
485 name, args, NULL, fg->graph);
489 ret = avfilter_link(last_filter, pad_idx, fps, 0);
496 snprintf(name, sizeof(name), "trim for output stream %d:%d",
497 ost->file_index, ost->index);
498 ret = insert_trim(of->start_time, of->recording_time,
499 &last_filter, &pad_idx, name);
504 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
510 static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
512 OutputStream *ost = ofilter->ost;
513 OutputFile *of = output_files[ost->file_index];
514 AVCodecContext *codec = ost->enc_ctx;
515 AVFilterContext *last_filter = out->filter_ctx;
516 int pad_idx = out->pad_idx;
517 char *sample_fmts, *sample_rates, *channel_layouts;
521 snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
522 ret = avfilter_graph_create_filter(&ofilter->filter,
523 avfilter_get_by_name("abuffersink"),
524 name, NULL, NULL, fg->graph);
527 if ((ret = av_opt_set_int(ofilter->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
530 #define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
531 AVFilterContext *filt_ctx; \
533 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
534 "similarly to -af " filter_name "=%s.\n", arg); \
536 ret = avfilter_graph_create_filter(&filt_ctx, \
537 avfilter_get_by_name(filter_name), \
538 filter_name, arg, NULL, fg->graph); \
542 ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
546 last_filter = filt_ctx; \
549 if (ost->audio_channels_mapped) {
552 av_bprint_init(&pan_buf, 256, 8192);
553 av_bprintf(&pan_buf, "0x%"PRIx64,
554 av_get_default_channel_layout(ost->audio_channels_mapped));
555 for (i = 0; i < ost->audio_channels_mapped; i++)
556 if (ost->audio_channels_map[i] != -1)
557 av_bprintf(&pan_buf, "|c%d=c%d", i, ost->audio_channels_map[i]);
559 AUTO_INSERT_FILTER("-map_channel", "pan", pan_buf.str);
560 av_bprint_finalize(&pan_buf, NULL);
563 if (codec->channels && !codec->channel_layout)
564 codec->channel_layout = av_get_default_channel_layout(codec->channels);
566 sample_fmts = choose_sample_fmts(ost);
567 sample_rates = choose_sample_rates(ost);
568 channel_layouts = choose_channel_layouts(ost);
569 if (sample_fmts || sample_rates || channel_layouts) {
570 AVFilterContext *format;
575 av_strlcatf(args, sizeof(args), "sample_fmts=%s:",
578 av_strlcatf(args, sizeof(args), "sample_rates=%s:",
581 av_strlcatf(args, sizeof(args), "channel_layouts=%s:",
584 av_freep(&sample_fmts);
585 av_freep(&sample_rates);
586 av_freep(&channel_layouts);
588 snprintf(name, sizeof(name), "audio format for output stream %d:%d",
589 ost->file_index, ost->index);
590 ret = avfilter_graph_create_filter(&format,
591 avfilter_get_by_name("aformat"),
592 name, args, NULL, fg->graph);
596 ret = avfilter_link(last_filter, pad_idx, format, 0);
600 last_filter = format;
604 if (audio_volume != 256 && 0) {
607 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
608 AUTO_INSERT_FILTER("-vol", "volume", args);
611 if (ost->apad && of->shortest) {
615 for (i=0; i<of->ctx->nb_streams; i++)
616 if (of->ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
619 if (i<of->ctx->nb_streams) {
620 snprintf(args, sizeof(args), "%s", ost->apad);
621 AUTO_INSERT_FILTER("-apad", "apad", args);
625 snprintf(name, sizeof(name), "trim for output stream %d:%d",
626 ost->file_index, ost->index);
627 ret = insert_trim(of->start_time, of->recording_time,
628 &last_filter, &pad_idx, name);
632 if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
638 #define DESCRIBE_FILTER_LINK(f, inout, in) \
640 AVFilterContext *ctx = inout->filter_ctx; \
641 AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
642 int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs; \
645 if (avio_open_dyn_buf(&pb) < 0) \
648 avio_printf(pb, "%s", ctx->filter->name); \
650 avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
652 avio_close_dyn_buf(pb, &f->name); \
655 int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
657 av_freep(&ofilter->name);
658 DESCRIBE_FILTER_LINK(ofilter, out, 0);
661 av_log(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
665 switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
666 case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
667 case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
668 default: av_assert0(0);
672 static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
674 AVFormatContext *avf = input_files[ist->file_index]->ctx;
677 /* Compute the size of the canvas for the subtitles stream.
678 If the subtitles codecpar has set a size, use it. Otherwise use the
679 maximum dimensions of the video streams in the same file. */
683 for (i = 0; i < avf->nb_streams; i++) {
684 if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
685 w = FFMAX(w, avf->streams[i]->codecpar->width);
686 h = FFMAX(h, avf->streams[i]->codecpar->height);
693 av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
695 ist->sub2video.w = ist->resample_width = ifilter->width = w;
696 ist->sub2video.h = ist->resample_height = ifilter->height = h;
698 /* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
699 palettes for all rectangles are identical or compatible */
700 ist->resample_pix_fmt = ifilter->format = AV_PIX_FMT_RGB32;
702 ist->sub2video.frame = av_frame_alloc();
703 if (!ist->sub2video.frame)
704 return AVERROR(ENOMEM);
705 ist->sub2video.last_pts = INT64_MIN;
709 static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
712 AVFilterContext *last_filter;
713 const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
714 InputStream *ist = ifilter->ist;
715 InputFile *f = input_files[ist->file_index];
716 AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
718 AVRational fr = ist->framerate;
722 int ret, pad_idx = 0;
723 int64_t tsoffset = 0;
724 AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
727 return AVERROR(ENOMEM);
728 memset(par, 0, sizeof(*par));
729 par->format = AV_PIX_FMT_NONE;
731 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
732 av_log(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
733 ret = AVERROR(EINVAL);
738 fr = av_guess_frame_rate(input_files[ist->file_index]->ctx, ist->st, NULL);
740 if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
741 ret = sub2video_prepare(ist, ifilter);
746 sar = ifilter->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",
753 ifilter->width, ifilter->height, ifilter->format,
754 tb.num, tb.den, sar.num, sar.den,
755 SWS_BILINEAR + ((ist->dec_ctx->flags&AV_CODEC_FLAG_BITEXACT) ? SWS_BITEXACT:0));
756 if (fr.num && fr.den)
757 av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
758 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
759 ist->file_index, ist->st->index);
762 if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
763 args.str, NULL, fg->graph)) < 0)
765 par->hw_frames_ctx = ifilter->hw_frames_ctx;
766 ret = av_buffersrc_parameters_set(ifilter->filter, par);
770 last_filter = ifilter->filter;
772 if (ist->autorotate) {
773 double theta = get_rotation(ist->st);
775 if (fabs(theta - 90) < 1.0) {
776 ret = insert_filter(&last_filter, &pad_idx, "transpose", "clock");
777 } else if (fabs(theta - 180) < 1.0) {
778 ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
781 ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
782 } else if (fabs(theta - 270) < 1.0) {
783 ret = insert_filter(&last_filter, &pad_idx, "transpose", "cclock");
784 } else if (fabs(theta) > 1.0) {
786 snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
787 ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
793 if (ist->framerate.num) {
794 AVFilterContext *setpts;
796 snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
797 ist->file_index, ist->st->index);
798 if ((ret = avfilter_graph_create_filter(&setpts,
799 avfilter_get_by_name("setpts"),
804 if ((ret = avfilter_link(last_filter, 0, setpts, 0)) < 0)
807 last_filter = setpts;
810 if (do_deinterlace) {
811 AVFilterContext *yadif;
813 snprintf(name, sizeof(name), "deinterlace input from stream %d:%d",
814 ist->file_index, ist->st->index);
815 if ((ret = avfilter_graph_create_filter(&yadif,
816 avfilter_get_by_name("yadif"),
821 if ((ret = avfilter_link(last_filter, 0, yadif, 0)) < 0)
827 snprintf(name, sizeof(name), "trim for input stream %d:%d",
828 ist->file_index, ist->st->index);
830 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
831 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
832 tsoffset += f->ctx->start_time;
834 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
835 AV_NOPTS_VALUE : tsoffset, f->recording_time,
836 &last_filter, &pad_idx, name);
840 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
849 static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
852 AVFilterContext *last_filter;
853 const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
854 InputStream *ist = ifilter->ist;
855 InputFile *f = input_files[ist->file_index];
858 int ret, pad_idx = 0;
859 int64_t tsoffset = 0;
861 if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
862 av_log(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
863 return AVERROR(EINVAL);
866 av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
867 av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
868 1, ifilter->sample_rate,
869 ifilter->sample_rate,
870 av_get_sample_fmt_name(ifilter->format));
871 if (ifilter->channel_layout)
872 av_bprintf(&args, ":channel_layout=0x%"PRIx64,
873 ifilter->channel_layout);
875 av_bprintf(&args, ":channels=%d", ifilter->channels);
876 snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
877 ist->file_index, ist->st->index);
879 if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
880 name, args.str, NULL,
883 last_filter = ifilter->filter;
885 #define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
886 AVFilterContext *filt_ctx; \
888 av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
889 "similarly to -af " filter_name "=%s.\n", arg); \
891 snprintf(name, sizeof(name), "graph %d %s for input stream %d:%d", \
892 fg->index, filter_name, ist->file_index, ist->st->index); \
893 ret = avfilter_graph_create_filter(&filt_ctx, \
894 avfilter_get_by_name(filter_name), \
895 name, arg, NULL, fg->graph); \
899 ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
903 last_filter = filt_ctx; \
906 if (audio_sync_method > 0) {
907 char args[256] = {0};
909 av_strlcatf(args, sizeof(args), "async=%d", audio_sync_method);
910 if (audio_drift_threshold != 0.1)
911 av_strlcatf(args, sizeof(args), ":min_hard_comp=%f", audio_drift_threshold);
912 if (!fg->reconfiguration)
913 av_strlcatf(args, sizeof(args), ":first_pts=0");
914 AUTO_INSERT_FILTER_INPUT("-async", "aresample", args);
917 // if (ost->audio_channels_mapped) {
920 // av_bprint_init(&pan_buf, 256, 8192);
921 // av_bprintf(&pan_buf, "0x%"PRIx64,
922 // av_get_default_channel_layout(ost->audio_channels_mapped));
923 // for (i = 0; i < ost->audio_channels_mapped; i++)
924 // if (ost->audio_channels_map[i] != -1)
925 // av_bprintf(&pan_buf, ":c%d=c%d", i, ost->audio_channels_map[i]);
926 // AUTO_INSERT_FILTER_INPUT("-map_channel", "pan", pan_buf.str);
927 // av_bprint_finalize(&pan_buf, NULL);
930 if (audio_volume != 256) {
933 av_log(NULL, AV_LOG_WARNING, "-vol has been deprecated. Use the volume "
934 "audio filter instead.\n");
936 snprintf(args, sizeof(args), "%f", audio_volume / 256.);
937 AUTO_INSERT_FILTER_INPUT("-vol", "volume", args);
940 snprintf(name, sizeof(name), "trim for input stream %d:%d",
941 ist->file_index, ist->st->index);
943 tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
944 if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
945 tsoffset += f->ctx->start_time;
947 ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
948 AV_NOPTS_VALUE : tsoffset, f->recording_time,
949 &last_filter, &pad_idx, name);
953 if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
959 static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
962 av_freep(&ifilter->name);
963 DESCRIBE_FILTER_LINK(ifilter, in, 1);
965 if (!ifilter->ist->dec) {
966 av_log(NULL, AV_LOG_ERROR,
967 "No decoder for stream #%d:%d, filtering impossible\n",
968 ifilter->ist->file_index, ifilter->ist->st->index);
969 return AVERROR_DECODER_NOT_FOUND;
971 switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
972 case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
973 case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
974 default: av_assert0(0);
978 int configure_filtergraph(FilterGraph *fg)
980 AVFilterInOut *inputs, *outputs, *cur;
981 int ret, i, simple = filtergraph_is_simple(fg);
982 const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
985 avfilter_graph_free(&fg->graph);
986 if (!(fg->graph = avfilter_graph_alloc()))
987 return AVERROR(ENOMEM);
990 OutputStream *ost = fg->outputs[0]->ost;
992 AVDictionaryEntry *e = NULL;
995 while ((e = av_dict_get(ost->sws_dict, "", e,
996 AV_DICT_IGNORE_SUFFIX))) {
997 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1000 args[strlen(args)-1] = 0;
1001 fg->graph->scale_sws_opts = av_strdup(args);
1004 while ((e = av_dict_get(ost->swr_opts, "", e,
1005 AV_DICT_IGNORE_SUFFIX))) {
1006 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1009 args[strlen(args)-1] = 0;
1010 av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
1013 while ((e = av_dict_get(fg->outputs[0]->ost->resample_opts, "", e,
1014 AV_DICT_IGNORE_SUFFIX))) {
1015 av_strlcatf(args, sizeof(args), "%s=%s:", e->key, e->value);
1018 args[strlen(args) - 1] = '\0';
1019 fg->graph->resample_lavr_opts = av_strdup(args);
1021 e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
1023 av_opt_set(fg->graph, "threads", e->value, 0);
1026 if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
1029 if (hw_device_ctx) {
1030 for (i = 0; i < fg->graph->nb_filters; i++) {
1031 fg->graph->filters[i]->hw_device_ctx = av_buffer_ref(hw_device_ctx);
1035 if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
1036 const char *num_inputs;
1037 const char *num_outputs;
1040 } else if (outputs->next) {
1047 } else if (inputs->next) {
1052 av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
1053 "to have exactly 1 input and 1 output."
1054 " However, it had %s input(s) and %s output(s)."
1055 " Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
1056 graph_desc, num_inputs, num_outputs);
1057 return AVERROR(EINVAL);
1060 for (cur = inputs, i = 0; cur; cur = cur->next, i++)
1061 if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0) {
1062 avfilter_inout_free(&inputs);
1063 avfilter_inout_free(&outputs);
1066 avfilter_inout_free(&inputs);
1068 for (cur = outputs, i = 0; cur; cur = cur->next, i++)
1069 configure_output_filter(fg, fg->outputs[i], cur);
1070 avfilter_inout_free(&outputs);
1072 if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
1075 fg->reconfiguration = 1;
1077 for (i = 0; i < fg->nb_outputs; i++) {
1078 OutputStream *ost = fg->outputs[i]->ost;
1080 /* identical to the same check in ffmpeg.c, needed because
1081 complex filter graphs are initialized earlier */
1082 av_log(NULL, AV_LOG_ERROR, "Encoder (codec %s) not found for output stream #%d:%d\n",
1083 avcodec_get_name(ost->st->codecpar->codec_id), ost->file_index, ost->index);
1084 return AVERROR(EINVAL);
1086 if (ost->enc->type == AVMEDIA_TYPE_AUDIO &&
1087 !(ost->enc->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
1088 av_buffersink_set_frame_size(ost->filter->filter,
1089 ost->enc_ctx->frame_size);
1095 int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
1097 av_buffer_unref(&ifilter->hw_frames_ctx);
1099 ifilter->format = frame->format;
1101 ifilter->width = frame->width;
1102 ifilter->height = frame->height;
1103 ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
1105 ifilter->sample_rate = frame->sample_rate;
1106 ifilter->channels = av_frame_get_channels(frame);
1107 ifilter->channel_layout = frame->channel_layout;
1109 if (frame->hw_frames_ctx) {
1110 ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
1111 if (!ifilter->hw_frames_ctx)
1112 return AVERROR(ENOMEM);
1118 int ifilter_parameters_from_decoder(InputFilter *ifilter, const AVCodecContext *avctx)
1120 av_buffer_unref(&ifilter->hw_frames_ctx);
1122 if (avctx->codec_type == AVMEDIA_TYPE_VIDEO)
1123 ifilter->format = avctx->pix_fmt;
1125 ifilter->format = avctx->sample_fmt;
1127 ifilter->width = avctx->width;
1128 ifilter->height = avctx->height;
1129 if (ifilter->ist && ifilter->ist->st && ifilter->ist->st->sample_aspect_ratio.num)
1130 ifilter->sample_aspect_ratio = ifilter->ist->st->sample_aspect_ratio;
1132 ifilter->sample_aspect_ratio = avctx->sample_aspect_ratio;
1134 ifilter->sample_rate = avctx->sample_rate;
1135 ifilter->channels = avctx->channels;
1136 ifilter->channel_layout = avctx->channel_layout;
1138 if (avctx->hw_frames_ctx) {
1139 ifilter->hw_frames_ctx = av_buffer_ref(avctx->hw_frames_ctx);
1140 if (!ifilter->hw_frames_ctx)
1141 return AVERROR(ENOMEM);
1147 int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
1150 for (i = 0; i < fg->nb_inputs; i++)
1151 if (fg->inputs[i]->ist == ist)
1156 int filtergraph_is_simple(FilterGraph *fg)
1158 return !fg->graph_desc;