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 char tagbuf[32], tagbuf2[32];
374 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), par->codec_tag);
375 av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, par->codec_id));
376 av_log(s, AV_LOG_ERROR,
377 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
378 tagbuf, par->codec_tag, par->codec_id, tagbuf2);
379 ret = AVERROR_INVALIDDATA;
383 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
386 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
387 s->internal->nb_interleaved_streams++;
390 if (!s->priv_data && of->priv_data_size > 0) {
391 s->priv_data = av_mallocz(of->priv_data_size);
393 ret = AVERROR(ENOMEM);
396 if (of->priv_class) {
397 *(const AVClass **)s->priv_data = of->priv_class;
398 av_opt_set_defaults(s->priv_data);
399 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
404 /* set muxer identification string */
405 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
406 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
408 av_dict_set(&s->metadata, "encoder", NULL, 0);
411 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
412 av_dict_set(&s->metadata, e->key, NULL, 0);
416 av_dict_free(options);
420 if (s->oformat->init) {
421 if ((ret = s->oformat->init(s)) < 0) {
422 if (s->oformat->deinit)
423 s->oformat->deinit(s);
436 static int init_pts(AVFormatContext *s)
441 /* init PTS generation */
442 for (i = 0; i < s->nb_streams; i++) {
443 int64_t den = AV_NOPTS_VALUE;
446 switch (st->codecpar->codec_type) {
447 case AVMEDIA_TYPE_AUDIO:
448 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
450 case AVMEDIA_TYPE_VIDEO:
451 den = (int64_t)st->time_base.num * st->time_base.den;
458 st->priv_pts = av_mallocz(sizeof(*st->priv_pts));
460 return AVERROR(ENOMEM);
462 if (den != AV_NOPTS_VALUE) {
464 return AVERROR_INVALIDDATA;
466 frac_init(st->priv_pts, 0, 0, den);
473 static int write_header_internal(AVFormatContext *s)
475 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
476 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
477 if (s->oformat->write_header) {
478 int ret = s->oformat->write_header(s);
479 if (ret >= 0 && s->pb && s->pb->error < 0)
481 s->internal->write_header_ret = ret;
484 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
487 s->internal->header_written = 1;
488 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
489 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
493 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
497 if ((ret = init_muxer(s, options)) < 0)
500 s->internal->initialized = 1;
501 s->internal->streams_initialized = ret;
503 if (s->oformat->init && ret) {
504 if ((ret = init_pts(s)) < 0)
507 if (s->avoid_negative_ts < 0) {
508 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
509 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
510 s->avoid_negative_ts = 0;
512 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
515 return AVSTREAM_INIT_IN_INIT_OUTPUT;
518 return AVSTREAM_INIT_IN_WRITE_HEADER;
521 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
524 int already_initialized = s->internal->initialized;
525 int streams_already_initialized = s->internal->streams_initialized;
527 if (!already_initialized)
528 if ((ret = avformat_init_output(s, options)) < 0)
531 if (!(s->oformat->check_bitstream && s->flags & AVFMT_FLAG_AUTO_BSF)) {
532 ret = write_header_internal(s);
537 if (!s->internal->streams_initialized) {
538 if ((ret = init_pts(s)) < 0)
541 if (s->avoid_negative_ts < 0) {
542 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
543 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
544 s->avoid_negative_ts = 0;
546 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
550 return streams_already_initialized;
553 if (s->oformat->deinit)
554 s->oformat->deinit(s);
558 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
560 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
561 it is only being used internally to this file as a consistency check.
562 The value is chosen to be very unlikely to appear on its own and to cause
563 immediate failure if used anywhere as a real size. */
564 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
567 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
568 FF_DISABLE_DEPRECATION_WARNINGS
569 //FIXME merge with compute_pkt_fields
570 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
572 int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
576 if (!s->internal->missing_ts_warning &&
577 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
578 (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC) || (st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) &&
579 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
580 av_log(s, AV_LOG_WARNING,
581 "Timestamps are unset in a packet for stream %d. "
582 "This is deprecated and will stop working in the future. "
583 "Fix your code to set the timestamps properly\n", st->index);
584 s->internal->missing_ts_warning = 1;
587 if (s->debug & FF_FDEBUG_TS)
588 av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
589 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
591 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
592 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
593 pkt->duration, pkt->stream_index);
598 if (pkt->duration == 0) {
599 ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
601 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
605 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
608 //XXX/FIXME this is a temporary hack until all encoders output pts
609 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
612 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
616 // pkt->pts= st->cur_dts;
617 pkt->pts = st->priv_pts->val;
620 //calculate dts from pts
621 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
622 st->pts_buffer[0] = pkt->pts;
623 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
624 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
625 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
626 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
628 pkt->dts = st->pts_buffer[0];
631 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
632 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
633 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
634 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
635 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
636 av_log(s, AV_LOG_ERROR,
637 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
638 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
639 return AVERROR(EINVAL);
641 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
642 av_log(s, AV_LOG_ERROR,
643 "pts (%s) < dts (%s) in stream %d\n",
644 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
646 return AVERROR(EINVAL);
649 if (s->debug & FF_FDEBUG_TS)
650 av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
651 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
653 st->cur_dts = pkt->dts;
654 st->priv_pts->val = pkt->dts;
657 switch (st->codecpar->codec_type) {
658 case AVMEDIA_TYPE_AUDIO:
659 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
660 ((AVFrame *)pkt->data)->nb_samples :
661 av_get_audio_frame_duration(st->codec, pkt->size);
663 /* HACK/FIXME, we skip the initial 0 size packets as they are most
664 * likely equal to the encoder delay, but it would be better if we
665 * had the real timestamps from the encoder */
666 if (frame_size >= 0 && (pkt->size || st->priv_pts->num != st->priv_pts->den >> 1 || st->priv_pts->val)) {
667 frac_add(st->priv_pts, (int64_t)st->time_base.den * frame_size);
670 case AVMEDIA_TYPE_VIDEO:
671 frac_add(st->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
676 FF_ENABLE_DEPRECATION_WARNINGS
680 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
683 * FIXME: this function should NEVER get undefined pts/dts beside when the
684 * AVFMT_NOTIMESTAMPS is set.
685 * Those additional safety checks should be dropped once the correct checks
686 * are set in the callers.
688 static int write_packet(AVFormatContext *s, AVPacket *pkt)
691 int64_t pts_backup, dts_backup;
693 pts_backup = pkt->pts;
694 dts_backup = pkt->dts;
696 // If the timestamp offsetting below is adjusted, adjust
697 // ff_interleaved_peek similarly.
698 if (s->output_ts_offset) {
699 AVStream *st = s->streams[pkt->stream_index];
700 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
702 if (pkt->dts != AV_NOPTS_VALUE)
704 if (pkt->pts != AV_NOPTS_VALUE)
708 if (s->avoid_negative_ts > 0) {
709 AVStream *st = s->streams[pkt->stream_index];
710 int64_t offset = st->mux_ts_offset;
711 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
713 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
714 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
715 s->internal->offset = -ts;
716 s->internal->offset_timebase = st->time_base;
719 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
720 offset = st->mux_ts_offset =
721 av_rescale_q_rnd(s->internal->offset,
722 s->internal->offset_timebase,
727 if (pkt->dts != AV_NOPTS_VALUE)
729 if (pkt->pts != AV_NOPTS_VALUE)
732 if (s->internal->avoid_negative_ts_use_pts) {
733 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
734 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
735 "pts %s in stream %d.\n"
736 "Try -avoid_negative_ts 1 as a possible workaround.\n",
742 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
743 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
744 av_log(s, AV_LOG_WARNING,
745 "Packets poorly interleaved, failed to avoid negative "
746 "timestamp %s in stream %d.\n"
747 "Try -max_interleave_delta 0 as a possible workaround.\n",
755 did_split = av_packet_split_side_data(pkt);
757 if (!s->internal->header_written) {
758 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
763 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
764 AVFrame *frame = (AVFrame *)pkt->data;
765 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
766 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
767 av_frame_free(&frame);
769 ret = s->oformat->write_packet(s, pkt);
772 if (s->pb && ret >= 0) {
773 if (s->flush_packets && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
775 if (s->pb->error < 0)
781 av_packet_merge_side_data(pkt);
784 pkt->pts = pts_backup;
785 pkt->dts = dts_backup;
791 static int check_packet(AVFormatContext *s, AVPacket *pkt)
796 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
797 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
799 return AVERROR(EINVAL);
802 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
803 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
804 return AVERROR(EINVAL);
810 static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
814 ret = check_packet(s, pkt);
818 #if !FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
819 /* sanitize the timestamps */
820 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
821 AVStream *st = s->streams[pkt->stream_index];
823 /* when there is no reordering (so dts is equal to pts), but
824 * only one of them is set, set the other as well */
825 if (!st->internal->reorder) {
826 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
828 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
832 /* check that the timestamps are set */
833 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
834 av_log(s, AV_LOG_ERROR,
835 "Timestamps are unset in a packet for stream %d\n", st->index);
836 return AVERROR(EINVAL);
839 /* check that the dts are increasing (or at least non-decreasing,
840 * if the format allows it */
841 if (st->cur_dts != AV_NOPTS_VALUE &&
842 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
843 st->cur_dts > pkt->dts)) {
844 av_log(s, AV_LOG_ERROR,
845 "Application provided invalid, non monotonically increasing "
846 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
847 st->index, st->cur_dts, pkt->dts);
848 return AVERROR(EINVAL);
851 if (pkt->pts < pkt->dts) {
852 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
853 pkt->pts, pkt->dts, st->index);
854 return AVERROR(EINVAL);
862 static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt) {
863 AVStream *st = s->streams[pkt->stream_index];
866 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
869 if (s->oformat->check_bitstream) {
870 if (!st->internal->bitstream_checked) {
871 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
874 st->internal->bitstream_checked = 1;
878 if (st->internal->nb_bsfcs)
879 av_packet_split_side_data(pkt);
881 for (i = 0; i < st->internal->nb_bsfcs; i++) {
882 AVBSFContext *ctx = st->internal->bsfcs[i];
884 AVBSFContext* prev_ctx = st->internal->bsfcs[i - 1];
885 if (prev_ctx->par_out->extradata_size != ctx->par_in->extradata_size) {
886 if ((ret = avcodec_parameters_copy(ctx->par_in, prev_ctx->par_out)) < 0)
890 // TODO: when any bitstream filter requires flushing at EOF, we'll need to
891 // flush each stream's BSF chain on write_trailer.
892 if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
893 av_log(ctx, AV_LOG_ERROR,
894 "Failed to send packet to filter %s for stream %d\n",
895 ctx->filter->name, pkt->stream_index);
898 // TODO: when any automatically-added bitstream filter is generating multiple
899 // output packets for a single input one, we'll need to call this in a loop
900 // and write each output packet.
901 if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
902 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
904 av_log(ctx, AV_LOG_ERROR,
905 "Failed to send packet to filter %s for stream %d\n",
906 ctx->filter->name, pkt->stream_index);
909 if (i == st->internal->nb_bsfcs - 1) {
910 if (ctx->par_out->extradata_size != st->codecpar->extradata_size) {
911 if ((ret = avcodec_parameters_copy(st->codecpar, ctx->par_out)) < 0)
919 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
923 ret = prepare_input_packet(s, pkt);
928 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
929 if (!s->internal->header_written) {
930 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
934 ret = s->oformat->write_packet(s, NULL);
935 if (s->flush_packets && s->pb && s->pb->error >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
937 if (ret >= 0 && s->pb && s->pb->error < 0)
944 ret = do_packet_auto_bsf(s, pkt);
948 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
949 ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
951 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
955 ret = write_packet(s, pkt);
956 if (ret >= 0 && s->pb && s->pb->error < 0)
960 s->streams[pkt->stream_index]->nb_frames++;
964 #define CHUNK_START 0x1000
966 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
967 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
970 AVPacketList **next_point, *this_pktl;
971 AVStream *st = s->streams[pkt->stream_index];
972 int chunked = s->max_chunk_size || s->max_chunk_duration;
974 this_pktl = av_mallocz(sizeof(AVPacketList));
976 return AVERROR(ENOMEM);
977 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
978 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
979 av_assert0(((AVFrame *)pkt->data)->buf);
980 this_pktl->pkt = *pkt;
982 pkt->side_data = NULL;
983 pkt->side_data_elems = 0;
985 if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
991 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
992 next_point = &(st->last_in_packet_buffer->next);
994 next_point = &s->internal->packet_buffer;
998 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
999 st->interleaver_chunk_size += pkt->size;
1000 st->interleaver_chunk_duration += pkt->duration;
1001 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
1002 || (max && st->interleaver_chunk_duration > max)) {
1003 st->interleaver_chunk_size = 0;
1004 this_pktl->pkt.flags |= CHUNK_START;
1005 if (max && st->interleaver_chunk_duration > max) {
1006 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
1007 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
1009 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
1011 st->interleaver_chunk_duration = 0;
1015 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
1018 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
1020 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
1021 || !compare(s, &(*next_point)->pkt, pkt)))
1022 next_point = &(*next_point)->next;
1026 next_point = &(s->internal->packet_buffer_end->next);
1029 av_assert1(!*next_point);
1031 s->internal->packet_buffer_end = this_pktl;
1034 this_pktl->next = *next_point;
1036 s->streams[pkt->stream_index]->last_in_packet_buffer =
1037 *next_point = this_pktl;
1039 av_packet_unref(pkt);
1044 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
1047 AVStream *st = s->streams[pkt->stream_index];
1048 AVStream *st2 = s->streams[next->stream_index];
1049 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1051 if (s->audio_preload && ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO))) {
1052 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);
1053 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);
1055 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
1056 -( 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;
1059 comp= (ts>ts2) - (ts<ts2);
1063 return pkt->stream_index < next->stream_index;
1067 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1068 AVPacket *pkt, int flush)
1071 int stream_count = 0;
1072 int noninterleaved_count = 0;
1077 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1081 for (i = 0; i < s->nb_streams; i++) {
1082 if (s->streams[i]->last_in_packet_buffer) {
1084 } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1085 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP8 &&
1086 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP9) {
1087 ++noninterleaved_count;
1091 if (s->internal->nb_interleaved_streams == stream_count)
1094 if (s->max_interleave_delta > 0 &&
1095 s->internal->packet_buffer &&
1097 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1099 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1100 int64_t delta_dts = INT64_MIN;
1101 int64_t top_dts = av_rescale_q(top_pkt->dts,
1102 s->streams[top_pkt->stream_index]->time_base,
1105 for (i = 0; i < s->nb_streams; i++) {
1107 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1112 last_dts = av_rescale_q(last->pkt.dts,
1113 s->streams[i]->time_base,
1115 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1118 if (delta_dts > s->max_interleave_delta) {
1119 av_log(s, AV_LOG_DEBUG,
1120 "Delay between the first packet and last packet in the "
1121 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1122 delta_dts, s->max_interleave_delta);
1127 if (s->internal->packet_buffer &&
1129 (s->flags & AVFMT_FLAG_SHORTEST) &&
1130 s->internal->shortest_end == AV_NOPTS_VALUE) {
1131 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1133 s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1134 s->streams[top_pkt->stream_index]->time_base,
1138 if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1139 while (s->internal->packet_buffer) {
1140 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1142 int64_t top_dts = av_rescale_q(top_pkt->dts,
1143 s->streams[top_pkt->stream_index]->time_base,
1146 if (s->internal->shortest_end + 1 >= top_dts)
1149 pktl = s->internal->packet_buffer;
1150 st = s->streams[pktl->pkt.stream_index];
1152 s->internal->packet_buffer = pktl->next;
1153 if (!s->internal->packet_buffer)
1154 s->internal->packet_buffer_end = NULL;
1156 if (st->last_in_packet_buffer == pktl)
1157 st->last_in_packet_buffer = NULL;
1159 av_packet_unref(&pktl->pkt);
1165 if (stream_count && flush) {
1167 pktl = s->internal->packet_buffer;
1169 st = s->streams[out->stream_index];
1171 s->internal->packet_buffer = pktl->next;
1172 if (!s->internal->packet_buffer)
1173 s->internal->packet_buffer_end = NULL;
1175 if (st->last_in_packet_buffer == pktl)
1176 st->last_in_packet_buffer = NULL;
1181 av_init_packet(out);
1186 int ff_interleaved_peek(AVFormatContext *s, int stream,
1187 AVPacket *pkt, int add_offset)
1189 AVPacketList *pktl = s->internal->packet_buffer;
1191 if (pktl->pkt.stream_index == stream) {
1194 AVStream *st = s->streams[pkt->stream_index];
1195 int64_t offset = st->mux_ts_offset;
1197 if (s->output_ts_offset)
1198 offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1200 if (pkt->dts != AV_NOPTS_VALUE)
1202 if (pkt->pts != AV_NOPTS_VALUE)
1209 return AVERROR(ENOENT);
1213 * Interleave an AVPacket correctly so it can be muxed.
1214 * @param out the interleaved packet will be output here
1215 * @param in the input packet
1216 * @param flush 1 if no further packets are available as input and all
1217 * remaining packets should be output
1218 * @return 1 if a packet was output, 0 if no packet could be output,
1219 * < 0 if an error occurred
1221 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1223 if (s->oformat->interleave_packet) {
1224 int ret = s->oformat->interleave_packet(s, out, in, flush);
1226 av_packet_unref(in);
1229 return ff_interleave_packet_per_dts(s, out, in, flush);
1232 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1236 ret = prepare_input_packet(s, pkt);
1241 AVStream *st = s->streams[pkt->stream_index];
1243 ret = do_packet_auto_bsf(s, pkt);
1249 if (s->debug & FF_FDEBUG_TS)
1250 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1251 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1253 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1254 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1258 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1259 ret = AVERROR(EINVAL);
1263 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1269 int ret = interleave_packet(s, &opkt, pkt, flush);
1271 memset(pkt, 0, sizeof(*pkt));
1272 av_init_packet(pkt);
1275 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1278 ret = write_packet(s, &opkt);
1280 s->streams[opkt.stream_index]->nb_frames++;
1282 av_packet_unref(&opkt);
1286 if(s->pb && s->pb->error)
1287 return s->pb->error;
1290 av_packet_unref(pkt);
1294 int av_write_trailer(AVFormatContext *s)
1300 ret = interleave_packet(s, &pkt, NULL, 1);
1306 ret = write_packet(s, &pkt);
1308 s->streams[pkt.stream_index]->nb_frames++;
1310 av_packet_unref(&pkt);
1314 if(s->pb && s->pb->error)
1318 if (!s->internal->header_written) {
1319 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
1325 if (s->internal->header_written && s->oformat->write_trailer) {
1326 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1327 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1329 ret = s->oformat->write_trailer(s);
1331 s->oformat->write_trailer(s);
1335 if (s->oformat->deinit)
1336 s->oformat->deinit(s);
1338 s->internal->header_written =
1339 s->internal->initialized =
1340 s->internal->streams_initialized = 0;
1345 ret = s->pb ? s->pb->error : 0;
1346 for (i = 0; i < s->nb_streams; i++) {
1347 av_freep(&s->streams[i]->priv_data);
1348 av_freep(&s->streams[i]->index_entries);
1350 if (s->oformat->priv_class)
1351 av_opt_free(s->priv_data);
1352 av_freep(&s->priv_data);
1356 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1357 int64_t *dts, int64_t *wall)
1359 if (!s->oformat || !s->oformat->get_output_timestamp)
1360 return AVERROR(ENOSYS);
1361 s->oformat->get_output_timestamp(s, stream, dts, wall);
1365 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1366 AVFormatContext *src, int interleave)
1372 local_pkt.stream_index = dst_stream;
1373 if (pkt->pts != AV_NOPTS_VALUE)
1374 local_pkt.pts = av_rescale_q(pkt->pts,
1375 src->streams[pkt->stream_index]->time_base,
1376 dst->streams[dst_stream]->time_base);
1377 if (pkt->dts != AV_NOPTS_VALUE)
1378 local_pkt.dts = av_rescale_q(pkt->dts,
1379 src->streams[pkt->stream_index]->time_base,
1380 dst->streams[dst_stream]->time_base);
1382 local_pkt.duration = av_rescale_q(pkt->duration,
1383 src->streams[pkt->stream_index]->time_base,
1384 dst->streams[dst_stream]->time_base);
1386 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1387 else ret = av_write_frame(dst, &local_pkt);
1388 pkt->buf = local_pkt.buf;
1389 pkt->side_data = local_pkt.side_data;
1390 pkt->side_data_elems = local_pkt.side_data_elems;
1394 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1395 AVFrame *frame, int interleaved)
1397 AVPacket pkt, *pktp;
1399 av_assert0(s->oformat);
1400 if (!s->oformat->write_uncoded_frame)
1401 return AVERROR(ENOSYS);
1407 av_init_packet(&pkt);
1408 pkt.data = (void *)frame;
1409 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1411 pkt.dts = frame->pts;
1412 pkt.duration = av_frame_get_pkt_duration(frame);
1413 pkt.stream_index = stream_index;
1414 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1417 return interleaved ? av_interleaved_write_frame(s, pktp) :
1418 av_write_frame(s, pktp);
1421 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1424 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1427 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1430 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1433 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1435 av_assert0(s->oformat);
1436 if (!s->oformat->write_uncoded_frame)
1437 return AVERROR(ENOSYS);
1438 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1439 AV_WRITE_UNCODED_FRAME_QUERY);