2 * muxing functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "avio_internal.h"
25 #include "libavcodec/internal.h"
26 #include "libavcodec/bytestream.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/timestamp.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/time.h"
40 #include "audiointerleave.h"
49 * muxing functions for use within libavformat
52 /* fraction handling */
55 * f = val + (num / den) + 0.5.
57 * 'num' is normalized so that it is such as 0 <= num < den.
59 * @param f fractional number
60 * @param val integer value
61 * @param num must be >= 0
62 * @param den must be >= 1
64 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
77 * Fractional addition to f: f = f + (incr / f->den).
79 * @param f fractional number
80 * @param incr increment, can be positive or negative
82 static void frac_add(FFFrac *f, int64_t incr)
95 } else if (num >= den) {
102 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
109 for (j=2; j<14; j+= 1+(j>2))
110 while (q.den / q.num < min_precision && q.num % j == 0)
112 while (q.den / q.num < min_precision && q.den < (1<<24))
118 enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
120 AVCodecParameters *par = st->codecpar;
121 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
123 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED)
124 return par->chroma_location;
127 if (pix_desc->log2_chroma_h == 0) {
128 return AVCHROMA_LOC_TOPLEFT;
129 } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
130 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order == AV_FIELD_PROGRESSIVE) {
131 switch (par->codec_id) {
132 case AV_CODEC_ID_MJPEG:
133 case AV_CODEC_ID_MPEG1VIDEO: return AVCHROMA_LOC_CENTER;
136 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order != AV_FIELD_PROGRESSIVE) {
137 switch (par->codec_id) {
138 case AV_CODEC_ID_MPEG2VIDEO: return AVCHROMA_LOC_LEFT;
144 return AVCHROMA_LOC_UNSPECIFIED;
148 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
149 const char *format, const char *filename)
151 AVFormatContext *s = avformat_alloc_context();
160 oformat = av_guess_format(format, NULL, NULL);
162 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
163 ret = AVERROR(EINVAL);
167 oformat = av_guess_format(NULL, filename, NULL);
169 ret = AVERROR(EINVAL);
170 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
177 s->oformat = oformat;
178 if (s->oformat->priv_data_size > 0) {
179 s->priv_data = av_mallocz(s->oformat->priv_data_size);
182 if (s->oformat->priv_class) {
183 *(const AVClass**)s->priv_data= s->oformat->priv_class;
184 av_opt_set_defaults(s->priv_data);
190 av_strlcpy(s->filename, filename, sizeof(s->filename));
194 av_log(s, AV_LOG_ERROR, "Out of memory\n");
195 ret = AVERROR(ENOMEM);
197 avformat_free_context(s);
201 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
203 const AVCodecTag *avctag;
205 enum AVCodecID id = AV_CODEC_ID_NONE;
209 * Check that tag + id is in the table
210 * If neither is in the table -> OK
211 * If tag is in the table with another id -> FAIL
212 * If id is in the table with another tag -> FAIL unless strict < normal
214 for (n = 0; s->oformat->codec_tag[n]; n++) {
215 avctag = s->oformat->codec_tag[n];
216 while (avctag->id != AV_CODEC_ID_NONE) {
217 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
219 if (id == st->codecpar->codec_id)
222 if (avctag->id == st->codecpar->codec_id)
227 if (id != AV_CODEC_ID_NONE)
229 if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
235 static int init_muxer(AVFormatContext *s, AVDictionary **options)
239 AVDictionary *tmp = NULL;
240 AVCodecParameters *par = NULL;
241 AVOutputFormat *of = s->oformat;
242 const AVCodecDescriptor *desc;
243 AVDictionaryEntry *e;
246 av_dict_copy(&tmp, *options, 0);
248 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
250 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
251 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
254 #if FF_API_LAVF_AVCTX
255 FF_DISABLE_DEPRECATION_WARNINGS
256 if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
257 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
258 #if FF_API_LAVF_BITEXACT
259 av_log(s, AV_LOG_WARNING,
260 "Setting the AVFormatContext to bitexact mode, because "
261 "the AVCodecContext is in that mode. This behavior will "
262 "change in the future. To keep the current behavior, set "
263 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
264 s->flags |= AVFMT_FLAG_BITEXACT;
266 av_log(s, AV_LOG_WARNING,
267 "The AVFormatContext is not in set to bitexact mode, only "
268 "the AVCodecContext. If this is not intended, set "
269 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
273 FF_ENABLE_DEPRECATION_WARNINGS
276 // some sanity checks
277 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
278 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
279 ret = AVERROR(EINVAL);
283 for (i = 0; i < s->nb_streams; i++) {
287 #if FF_API_LAVF_CODEC_TB && FF_API_LAVF_AVCTX
288 FF_DISABLE_DEPRECATION_WARNINGS
289 if (!st->time_base.num && st->codec->time_base.num) {
290 av_log(s, AV_LOG_WARNING, "Using AVStream.codec.time_base as a "
291 "timebase hint to the muxer is deprecated. Set "
292 "AVStream.time_base instead.\n");
293 avpriv_set_pts_info(st, 64, st->codec->time_base.num, st->codec->time_base.den);
295 FF_ENABLE_DEPRECATION_WARNINGS
298 #if FF_API_LAVF_AVCTX
299 FF_DISABLE_DEPRECATION_WARNINGS
300 if (st->codecpar->codec_type == AVMEDIA_TYPE_UNKNOWN &&
301 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
302 av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
303 "parameters to muxers is deprecated, use AVStream.codecpar "
305 ret = avcodec_parameters_from_context(st->codecpar, st->codec);
309 FF_ENABLE_DEPRECATION_WARNINGS
312 if (!st->time_base.num) {
313 /* fall back on the default timebase values */
314 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
315 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
317 avpriv_set_pts_info(st, 33, 1, 90000);
320 switch (par->codec_type) {
321 case AVMEDIA_TYPE_AUDIO:
322 if (par->sample_rate <= 0) {
323 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
324 ret = AVERROR(EINVAL);
327 if (!par->block_align)
328 par->block_align = par->channels *
329 av_get_bits_per_sample(par->codec_id) >> 3;
331 case AVMEDIA_TYPE_VIDEO:
332 if ((par->width <= 0 || par->height <= 0) &&
333 !(of->flags & AVFMT_NODIMENSIONS)) {
334 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
335 ret = AVERROR(EINVAL);
338 if (av_cmp_q(st->sample_aspect_ratio, par->sample_aspect_ratio)
339 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(par->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
341 if (st->sample_aspect_ratio.num != 0 &&
342 st->sample_aspect_ratio.den != 0 &&
343 par->sample_aspect_ratio.num != 0 &&
344 par->sample_aspect_ratio.den != 0) {
345 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
346 "(%d/%d) and encoder layer (%d/%d)\n",
347 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
348 par->sample_aspect_ratio.num,
349 par->sample_aspect_ratio.den);
350 ret = AVERROR(EINVAL);
357 desc = avcodec_descriptor_get(par->codec_id);
358 if (desc && desc->props & AV_CODEC_PROP_REORDER)
359 st->internal->reorder = 1;
363 && par->codec_id == AV_CODEC_ID_RAWVIDEO
364 && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
365 || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
366 && !validate_codec_tag(s, st)) {
367 // the current rawvideo encoding system ends up setting
368 // the wrong codec_tag for avi/mov, we override it here
371 if (par->codec_tag) {
372 if (!validate_codec_tag(s, st)) {
373 const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
374 av_log(s, AV_LOG_ERROR,
375 "Tag %s incompatible with output codec id '%d' (%s)\n",
376 av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
377 ret = AVERROR_INVALIDDATA;
381 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
384 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
385 s->internal->nb_interleaved_streams++;
388 if (!s->priv_data && of->priv_data_size > 0) {
389 s->priv_data = av_mallocz(of->priv_data_size);
391 ret = AVERROR(ENOMEM);
394 if (of->priv_class) {
395 *(const AVClass **)s->priv_data = of->priv_class;
396 av_opt_set_defaults(s->priv_data);
397 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
402 /* set muxer identification string */
403 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
404 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
406 av_dict_set(&s->metadata, "encoder", NULL, 0);
409 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
410 av_dict_set(&s->metadata, e->key, NULL, 0);
414 av_dict_free(options);
418 if (s->oformat->init) {
419 if ((ret = s->oformat->init(s)) < 0) {
420 if (s->oformat->deinit)
421 s->oformat->deinit(s);
434 static int init_pts(AVFormatContext *s)
439 /* init PTS generation */
440 for (i = 0; i < s->nb_streams; i++) {
441 int64_t den = AV_NOPTS_VALUE;
444 switch (st->codecpar->codec_type) {
445 case AVMEDIA_TYPE_AUDIO:
446 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
448 case AVMEDIA_TYPE_VIDEO:
449 den = (int64_t)st->time_base.num * st->time_base.den;
456 st->priv_pts = av_mallocz(sizeof(*st->priv_pts));
458 return AVERROR(ENOMEM);
460 if (den != AV_NOPTS_VALUE) {
462 return AVERROR_INVALIDDATA;
464 frac_init(st->priv_pts, 0, 0, den);
471 static void flush_if_needed(AVFormatContext *s)
473 if (s->pb && s->pb->error >= 0) {
474 if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
476 else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
477 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
481 static int write_header_internal(AVFormatContext *s)
483 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
484 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
485 if (s->oformat->write_header) {
486 int ret = s->oformat->write_header(s);
487 if (ret >= 0 && s->pb && s->pb->error < 0)
489 s->internal->write_header_ret = ret;
494 s->internal->header_written = 1;
495 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
496 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
500 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
504 if ((ret = init_muxer(s, options)) < 0)
507 s->internal->initialized = 1;
508 s->internal->streams_initialized = ret;
510 if (s->oformat->init && ret) {
511 if ((ret = init_pts(s)) < 0)
514 if (s->avoid_negative_ts < 0) {
515 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
516 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
517 s->avoid_negative_ts = 0;
519 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
522 return AVSTREAM_INIT_IN_INIT_OUTPUT;
525 return AVSTREAM_INIT_IN_WRITE_HEADER;
528 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
531 int already_initialized = s->internal->initialized;
532 int streams_already_initialized = s->internal->streams_initialized;
534 if (!already_initialized)
535 if ((ret = avformat_init_output(s, options)) < 0)
538 if (!(s->oformat->check_bitstream && s->flags & AVFMT_FLAG_AUTO_BSF)) {
539 ret = write_header_internal(s);
544 if (!s->internal->streams_initialized) {
545 if ((ret = init_pts(s)) < 0)
548 if (s->avoid_negative_ts < 0) {
549 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
550 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
551 s->avoid_negative_ts = 0;
553 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
557 return streams_already_initialized;
560 if (s->oformat->deinit)
561 s->oformat->deinit(s);
565 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
567 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
568 it is only being used internally to this file as a consistency check.
569 The value is chosen to be very unlikely to appear on its own and to cause
570 immediate failure if used anywhere as a real size. */
571 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
574 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
575 FF_DISABLE_DEPRECATION_WARNINGS
576 //FIXME merge with compute_pkt_fields
577 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
579 int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
583 if (!s->internal->missing_ts_warning &&
584 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
585 (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC) || (st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) &&
586 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
587 av_log(s, AV_LOG_WARNING,
588 "Timestamps are unset in a packet for stream %d. "
589 "This is deprecated and will stop working in the future. "
590 "Fix your code to set the timestamps properly\n", st->index);
591 s->internal->missing_ts_warning = 1;
594 if (s->debug & FF_FDEBUG_TS)
595 av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
596 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
598 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
599 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
600 pkt->duration, pkt->stream_index);
605 if (pkt->duration == 0) {
606 ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
608 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
612 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
615 //XXX/FIXME this is a temporary hack until all encoders output pts
616 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
619 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
623 // pkt->pts= st->cur_dts;
624 pkt->pts = st->priv_pts->val;
627 //calculate dts from pts
628 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
629 st->pts_buffer[0] = pkt->pts;
630 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
631 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
632 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
633 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
635 pkt->dts = st->pts_buffer[0];
638 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
639 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
640 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
641 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
642 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
643 av_log(s, AV_LOG_ERROR,
644 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
645 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
646 return AVERROR(EINVAL);
648 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
649 av_log(s, AV_LOG_ERROR,
650 "pts (%s) < dts (%s) in stream %d\n",
651 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
653 return AVERROR(EINVAL);
656 if (s->debug & FF_FDEBUG_TS)
657 av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
658 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
660 st->cur_dts = pkt->dts;
661 st->priv_pts->val = pkt->dts;
664 switch (st->codecpar->codec_type) {
665 case AVMEDIA_TYPE_AUDIO:
666 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
667 ((AVFrame *)pkt->data)->nb_samples :
668 av_get_audio_frame_duration(st->codec, pkt->size);
670 /* HACK/FIXME, we skip the initial 0 size packets as they are most
671 * likely equal to the encoder delay, but it would be better if we
672 * had the real timestamps from the encoder */
673 if (frame_size >= 0 && (pkt->size || st->priv_pts->num != st->priv_pts->den >> 1 || st->priv_pts->val)) {
674 frac_add(st->priv_pts, (int64_t)st->time_base.den * frame_size);
677 case AVMEDIA_TYPE_VIDEO:
678 frac_add(st->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
683 FF_ENABLE_DEPRECATION_WARNINGS
687 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
690 * FIXME: this function should NEVER get undefined pts/dts beside when the
691 * AVFMT_NOTIMESTAMPS is set.
692 * Those additional safety checks should be dropped once the correct checks
693 * are set in the callers.
695 static int write_packet(AVFormatContext *s, AVPacket *pkt)
698 int64_t pts_backup, dts_backup;
700 pts_backup = pkt->pts;
701 dts_backup = pkt->dts;
703 // If the timestamp offsetting below is adjusted, adjust
704 // ff_interleaved_peek similarly.
705 if (s->output_ts_offset) {
706 AVStream *st = s->streams[pkt->stream_index];
707 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
709 if (pkt->dts != AV_NOPTS_VALUE)
711 if (pkt->pts != AV_NOPTS_VALUE)
715 if (s->avoid_negative_ts > 0) {
716 AVStream *st = s->streams[pkt->stream_index];
717 int64_t offset = st->mux_ts_offset;
718 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
720 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
721 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
722 s->internal->offset = -ts;
723 s->internal->offset_timebase = st->time_base;
726 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
727 offset = st->mux_ts_offset =
728 av_rescale_q_rnd(s->internal->offset,
729 s->internal->offset_timebase,
734 if (pkt->dts != AV_NOPTS_VALUE)
736 if (pkt->pts != AV_NOPTS_VALUE)
739 if (s->internal->avoid_negative_ts_use_pts) {
740 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
741 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
742 "pts %s in stream %d.\n"
743 "Try -avoid_negative_ts 1 as a possible workaround.\n",
749 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
750 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
751 av_log(s, AV_LOG_WARNING,
752 "Packets poorly interleaved, failed to avoid negative "
753 "timestamp %s in stream %d.\n"
754 "Try -max_interleave_delta 0 as a possible workaround.\n",
762 #if FF_API_LAVF_MERGE_SD
763 FF_DISABLE_DEPRECATION_WARNINGS
764 did_split = av_packet_split_side_data(pkt);
765 FF_ENABLE_DEPRECATION_WARNINGS
768 if (!s->internal->header_written) {
769 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
774 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
775 AVFrame *frame = (AVFrame *)pkt->data;
776 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
777 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
778 av_frame_free(&frame);
780 ret = s->oformat->write_packet(s, pkt);
783 if (s->pb && ret >= 0) {
785 if (s->pb->error < 0)
790 #if FF_API_LAVF_MERGE_SD
791 FF_DISABLE_DEPRECATION_WARNINGS
793 av_packet_merge_side_data(pkt);
794 FF_ENABLE_DEPRECATION_WARNINGS
798 pkt->pts = pts_backup;
799 pkt->dts = dts_backup;
805 static int check_packet(AVFormatContext *s, AVPacket *pkt)
810 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
811 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
813 return AVERROR(EINVAL);
816 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
817 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
818 return AVERROR(EINVAL);
824 static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
828 ret = check_packet(s, pkt);
832 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
833 /* sanitize the timestamps */
834 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
835 AVStream *st = s->streams[pkt->stream_index];
837 /* when there is no reordering (so dts is equal to pts), but
838 * only one of them is set, set the other as well */
839 if (!st->internal->reorder) {
840 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
842 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
846 /* check that the timestamps are set */
847 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
848 av_log(s, AV_LOG_ERROR,
849 "Timestamps are unset in a packet for stream %d\n", st->index);
850 return AVERROR(EINVAL);
853 /* check that the dts are increasing (or at least non-decreasing,
854 * if the format allows it */
855 if (st->cur_dts != AV_NOPTS_VALUE &&
856 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
857 st->cur_dts > pkt->dts)) {
858 av_log(s, AV_LOG_ERROR,
859 "Application provided invalid, non monotonically increasing "
860 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
861 st->index, st->cur_dts, pkt->dts);
862 return AVERROR(EINVAL);
865 if (pkt->pts < pkt->dts) {
866 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
867 pkt->pts, pkt->dts, st->index);
868 return AVERROR(EINVAL);
876 static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt) {
877 AVStream *st = s->streams[pkt->stream_index];
880 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
883 if (s->oformat->check_bitstream) {
884 if (!st->internal->bitstream_checked) {
885 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
888 st->internal->bitstream_checked = 1;
892 #if FF_API_LAVF_MERGE_SD
893 FF_DISABLE_DEPRECATION_WARNINGS
894 if (st->internal->nb_bsfcs) {
895 ret = av_packet_split_side_data(pkt);
897 av_log(s, AV_LOG_WARNING, "Failed to split side data before bitstream filter\n");
899 FF_ENABLE_DEPRECATION_WARNINGS
902 for (i = 0; i < st->internal->nb_bsfcs; i++) {
903 AVBSFContext *ctx = st->internal->bsfcs[i];
904 // TODO: when any bitstream filter requires flushing at EOF, we'll need to
905 // flush each stream's BSF chain on write_trailer.
906 if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
907 av_log(ctx, AV_LOG_ERROR,
908 "Failed to send packet to filter %s for stream %d\n",
909 ctx->filter->name, pkt->stream_index);
912 // TODO: when any automatically-added bitstream filter is generating multiple
913 // output packets for a single input one, we'll need to call this in a loop
914 // and write each output packet.
915 if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
916 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
918 av_log(ctx, AV_LOG_ERROR,
919 "Failed to send packet to filter %s for stream %d\n",
920 ctx->filter->name, pkt->stream_index);
927 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
931 ret = prepare_input_packet(s, pkt);
936 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
937 if (!s->internal->header_written) {
938 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
942 ret = s->oformat->write_packet(s, NULL);
944 if (ret >= 0 && s->pb && s->pb->error < 0)
951 ret = do_packet_auto_bsf(s, pkt);
955 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
956 ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
958 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
962 ret = write_packet(s, pkt);
963 if (ret >= 0 && s->pb && s->pb->error < 0)
967 s->streams[pkt->stream_index]->nb_frames++;
971 #define CHUNK_START 0x1000
973 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
974 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
977 AVPacketList **next_point, *this_pktl;
978 AVStream *st = s->streams[pkt->stream_index];
979 int chunked = s->max_chunk_size || s->max_chunk_duration;
981 this_pktl = av_mallocz(sizeof(AVPacketList));
983 return AVERROR(ENOMEM);
984 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
985 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
986 av_assert0(((AVFrame *)pkt->data)->buf);
987 this_pktl->pkt = *pkt;
989 pkt->side_data = NULL;
990 pkt->side_data_elems = 0;
992 if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
998 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
999 next_point = &(st->last_in_packet_buffer->next);
1001 next_point = &s->internal->packet_buffer;
1005 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
1006 st->interleaver_chunk_size += pkt->size;
1007 st->interleaver_chunk_duration += pkt->duration;
1008 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
1009 || (max && st->interleaver_chunk_duration > max)) {
1010 st->interleaver_chunk_size = 0;
1011 this_pktl->pkt.flags |= CHUNK_START;
1012 if (max && st->interleaver_chunk_duration > max) {
1013 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
1014 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
1016 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
1018 st->interleaver_chunk_duration = 0;
1022 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
1025 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
1027 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
1028 || !compare(s, &(*next_point)->pkt, pkt)))
1029 next_point = &(*next_point)->next;
1033 next_point = &(s->internal->packet_buffer_end->next);
1036 av_assert1(!*next_point);
1038 s->internal->packet_buffer_end = this_pktl;
1041 this_pktl->next = *next_point;
1043 s->streams[pkt->stream_index]->last_in_packet_buffer =
1044 *next_point = this_pktl;
1046 av_packet_unref(pkt);
1051 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
1054 AVStream *st = s->streams[pkt->stream_index];
1055 AVStream *st2 = s->streams[next->stream_index];
1056 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1058 if (s->audio_preload && ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO))) {
1059 int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO);
1060 int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO);
1062 ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
1063 -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
1066 comp= (ts>ts2) - (ts<ts2);
1070 return pkt->stream_index < next->stream_index;
1074 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1075 AVPacket *pkt, int flush)
1078 int stream_count = 0;
1079 int noninterleaved_count = 0;
1084 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1088 for (i = 0; i < s->nb_streams; i++) {
1089 if (s->streams[i]->last_in_packet_buffer) {
1091 } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1092 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP8 &&
1093 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP9) {
1094 ++noninterleaved_count;
1098 if (s->internal->nb_interleaved_streams == stream_count)
1101 if (s->max_interleave_delta > 0 &&
1102 s->internal->packet_buffer &&
1104 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1106 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1107 int64_t delta_dts = INT64_MIN;
1108 int64_t top_dts = av_rescale_q(top_pkt->dts,
1109 s->streams[top_pkt->stream_index]->time_base,
1112 for (i = 0; i < s->nb_streams; i++) {
1114 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1119 last_dts = av_rescale_q(last->pkt.dts,
1120 s->streams[i]->time_base,
1122 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1125 if (delta_dts > s->max_interleave_delta) {
1126 av_log(s, AV_LOG_DEBUG,
1127 "Delay between the first packet and last packet in the "
1128 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1129 delta_dts, s->max_interleave_delta);
1134 if (s->internal->packet_buffer &&
1136 (s->flags & AVFMT_FLAG_SHORTEST) &&
1137 s->internal->shortest_end == AV_NOPTS_VALUE) {
1138 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1140 s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1141 s->streams[top_pkt->stream_index]->time_base,
1145 if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1146 while (s->internal->packet_buffer) {
1147 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1149 int64_t top_dts = av_rescale_q(top_pkt->dts,
1150 s->streams[top_pkt->stream_index]->time_base,
1153 if (s->internal->shortest_end + 1 >= top_dts)
1156 pktl = s->internal->packet_buffer;
1157 st = s->streams[pktl->pkt.stream_index];
1159 s->internal->packet_buffer = pktl->next;
1160 if (!s->internal->packet_buffer)
1161 s->internal->packet_buffer_end = NULL;
1163 if (st->last_in_packet_buffer == pktl)
1164 st->last_in_packet_buffer = NULL;
1166 av_packet_unref(&pktl->pkt);
1172 if (stream_count && flush) {
1174 pktl = s->internal->packet_buffer;
1176 st = s->streams[out->stream_index];
1178 s->internal->packet_buffer = pktl->next;
1179 if (!s->internal->packet_buffer)
1180 s->internal->packet_buffer_end = NULL;
1182 if (st->last_in_packet_buffer == pktl)
1183 st->last_in_packet_buffer = NULL;
1188 av_init_packet(out);
1193 int ff_interleaved_peek(AVFormatContext *s, int stream,
1194 AVPacket *pkt, int add_offset)
1196 AVPacketList *pktl = s->internal->packet_buffer;
1198 if (pktl->pkt.stream_index == stream) {
1201 AVStream *st = s->streams[pkt->stream_index];
1202 int64_t offset = st->mux_ts_offset;
1204 if (s->output_ts_offset)
1205 offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1207 if (pkt->dts != AV_NOPTS_VALUE)
1209 if (pkt->pts != AV_NOPTS_VALUE)
1216 return AVERROR(ENOENT);
1220 * Interleave an AVPacket correctly so it can be muxed.
1221 * @param out the interleaved packet will be output here
1222 * @param in the input packet
1223 * @param flush 1 if no further packets are available as input and all
1224 * remaining packets should be output
1225 * @return 1 if a packet was output, 0 if no packet could be output,
1226 * < 0 if an error occurred
1228 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1230 if (s->oformat->interleave_packet) {
1231 int ret = s->oformat->interleave_packet(s, out, in, flush);
1233 av_packet_unref(in);
1236 return ff_interleave_packet_per_dts(s, out, in, flush);
1239 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1243 ret = prepare_input_packet(s, pkt);
1248 AVStream *st = s->streams[pkt->stream_index];
1250 ret = do_packet_auto_bsf(s, pkt);
1256 if (s->debug & FF_FDEBUG_TS)
1257 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1258 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1260 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1261 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1265 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1266 ret = AVERROR(EINVAL);
1270 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1276 int ret = interleave_packet(s, &opkt, pkt, flush);
1278 memset(pkt, 0, sizeof(*pkt));
1279 av_init_packet(pkt);
1282 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1285 ret = write_packet(s, &opkt);
1287 s->streams[opkt.stream_index]->nb_frames++;
1289 av_packet_unref(&opkt);
1293 if(s->pb && s->pb->error)
1294 return s->pb->error;
1297 av_packet_unref(pkt);
1301 int av_write_trailer(AVFormatContext *s)
1307 ret = interleave_packet(s, &pkt, NULL, 1);
1313 ret = write_packet(s, &pkt);
1315 s->streams[pkt.stream_index]->nb_frames++;
1317 av_packet_unref(&pkt);
1321 if(s->pb && s->pb->error)
1325 if (!s->internal->header_written) {
1326 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
1332 if (s->internal->header_written && s->oformat->write_trailer) {
1333 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1334 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1336 ret = s->oformat->write_trailer(s);
1338 s->oformat->write_trailer(s);
1342 if (s->oformat->deinit)
1343 s->oformat->deinit(s);
1345 s->internal->header_written =
1346 s->internal->initialized =
1347 s->internal->streams_initialized = 0;
1352 ret = s->pb ? s->pb->error : 0;
1353 for (i = 0; i < s->nb_streams; i++) {
1354 av_freep(&s->streams[i]->priv_data);
1355 av_freep(&s->streams[i]->index_entries);
1357 if (s->oformat->priv_class)
1358 av_opt_free(s->priv_data);
1359 av_freep(&s->priv_data);
1363 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1364 int64_t *dts, int64_t *wall)
1366 if (!s->oformat || !s->oformat->get_output_timestamp)
1367 return AVERROR(ENOSYS);
1368 s->oformat->get_output_timestamp(s, stream, dts, wall);
1372 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1373 AVFormatContext *src, int interleave)
1379 local_pkt.stream_index = dst_stream;
1380 if (pkt->pts != AV_NOPTS_VALUE)
1381 local_pkt.pts = av_rescale_q(pkt->pts,
1382 src->streams[pkt->stream_index]->time_base,
1383 dst->streams[dst_stream]->time_base);
1384 if (pkt->dts != AV_NOPTS_VALUE)
1385 local_pkt.dts = av_rescale_q(pkt->dts,
1386 src->streams[pkt->stream_index]->time_base,
1387 dst->streams[dst_stream]->time_base);
1389 local_pkt.duration = av_rescale_q(pkt->duration,
1390 src->streams[pkt->stream_index]->time_base,
1391 dst->streams[dst_stream]->time_base);
1393 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1394 else ret = av_write_frame(dst, &local_pkt);
1395 pkt->buf = local_pkt.buf;
1396 pkt->side_data = local_pkt.side_data;
1397 pkt->side_data_elems = local_pkt.side_data_elems;
1401 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1402 AVFrame *frame, int interleaved)
1404 AVPacket pkt, *pktp;
1406 av_assert0(s->oformat);
1407 if (!s->oformat->write_uncoded_frame)
1408 return AVERROR(ENOSYS);
1414 av_init_packet(&pkt);
1415 pkt.data = (void *)frame;
1416 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1418 pkt.dts = frame->pts;
1419 pkt.duration = frame->pkt_duration;
1420 pkt.stream_index = stream_index;
1421 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1424 return interleaved ? av_interleaved_write_frame(s, pktp) :
1425 av_write_frame(s, pktp);
1428 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1431 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1434 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1437 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1440 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1442 av_assert0(s->oformat);
1443 if (!s->oformat->write_uncoded_frame)
1444 return AVERROR(ENOSYS);
1445 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1446 AV_WRITE_UNCODED_FRAME_QUERY);