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/mathematics.h"
36 #include "libavutil/parseutils.h"
37 #include "libavutil/time.h"
39 #include "audiointerleave.h"
51 * muxing functions for use within libavformat
54 /* fraction handling */
57 * f = val + (num / den) + 0.5.
59 * 'num' is normalized so that it is such as 0 <= num < den.
61 * @param f fractional number
62 * @param val integer value
63 * @param num must be >= 0
64 * @param den must be >= 1
66 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
79 * Fractional addition to f: f = f + (incr / f->den).
81 * @param f fractional number
82 * @param incr increment, can be positive or negative
84 static void frac_add(AVFrac *f, int64_t incr)
97 } else if (num >= den) {
104 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precission)
109 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
110 q = (AVRational){1, st->codec->sample_rate};
112 q = st->codec->time_base;
114 for (j=2; j<14; j+= 1+(j>2))
115 while (q.den / q.num < min_precission && q.num % j == 0)
117 while (q.den / q.num < min_precission && q.den < (1<<24))
123 int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat,
124 const char *format, const char *filename)
126 AVFormatContext *s = avformat_alloc_context();
135 oformat = av_guess_format(format, NULL, NULL);
137 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
138 ret = AVERROR(EINVAL);
142 oformat = av_guess_format(NULL, filename, NULL);
144 ret = AVERROR(EINVAL);
145 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
152 s->oformat = oformat;
153 if (s->oformat->priv_data_size > 0) {
154 s->priv_data = av_mallocz(s->oformat->priv_data_size);
157 if (s->oformat->priv_class) {
158 *(const AVClass**)s->priv_data= s->oformat->priv_class;
159 av_opt_set_defaults(s->priv_data);
165 av_strlcpy(s->filename, filename, sizeof(s->filename));
169 av_log(s, AV_LOG_ERROR, "Out of memory\n");
170 ret = AVERROR(ENOMEM);
172 avformat_free_context(s);
176 #if FF_API_ALLOC_OUTPUT_CONTEXT
177 AVFormatContext *avformat_alloc_output_context(const char *format,
178 AVOutputFormat *oformat, const char *filename)
180 AVFormatContext *avctx;
181 int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename);
182 return ret < 0 ? NULL : avctx;
186 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
188 const AVCodecTag *avctag;
190 enum AVCodecID id = AV_CODEC_ID_NONE;
191 unsigned int tag = 0;
194 * Check that tag + id is in the table
195 * If neither is in the table -> OK
196 * If tag is in the table with another id -> FAIL
197 * If id is in the table with another tag -> FAIL unless strict < normal
199 for (n = 0; s->oformat->codec_tag[n]; n++) {
200 avctag = s->oformat->codec_tag[n];
201 while (avctag->id != AV_CODEC_ID_NONE) {
202 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
204 if (id == st->codec->codec_id)
207 if (avctag->id == st->codec->codec_id)
212 if (id != AV_CODEC_ID_NONE)
214 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
220 static int init_muxer(AVFormatContext *s, AVDictionary **options)
224 AVDictionary *tmp = NULL;
225 AVCodecContext *codec = NULL;
226 AVOutputFormat *of = s->oformat;
229 av_dict_copy(&tmp, *options, 0);
231 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
233 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
234 (ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
237 // some sanity checks
238 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
239 av_log(s, AV_LOG_ERROR, "no streams\n");
240 ret = AVERROR(EINVAL);
244 for (i = 0; i < s->nb_streams; i++) {
248 switch (codec->codec_type) {
249 case AVMEDIA_TYPE_AUDIO:
250 if (codec->sample_rate <= 0) {
251 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
252 ret = AVERROR(EINVAL);
255 if (!codec->block_align)
256 codec->block_align = codec->channels *
257 av_get_bits_per_sample(codec->codec_id) >> 3;
259 case AVMEDIA_TYPE_VIDEO:
260 if (codec->time_base.num <= 0 ||
261 codec->time_base.den <= 0) { //FIXME audio too?
262 av_log(s, AV_LOG_ERROR, "time base not set\n");
263 ret = AVERROR(EINVAL);
267 if ((codec->width <= 0 || codec->height <= 0) &&
268 !(of->flags & AVFMT_NODIMENSIONS)) {
269 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
270 ret = AVERROR(EINVAL);
273 if (av_cmp_q(st->sample_aspect_ratio, codec->sample_aspect_ratio)
274 && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
276 if (st->sample_aspect_ratio.num != 0 &&
277 st->sample_aspect_ratio.den != 0 &&
278 codec->sample_aspect_ratio.den != 0 &&
279 codec->sample_aspect_ratio.den != 0) {
280 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
281 "(%d/%d) and encoder layer (%d/%d)\n",
282 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
283 codec->sample_aspect_ratio.num,
284 codec->sample_aspect_ratio.den);
285 ret = AVERROR(EINVAL);
293 if ( codec->codec_tag
294 && codec->codec_id == AV_CODEC_ID_RAWVIDEO
295 && ( av_codec_get_tag(of->codec_tag, codec->codec_id) == 0
296 || av_codec_get_tag(of->codec_tag, codec->codec_id) == MKTAG('r', 'a', 'w', ' '))
297 && !validate_codec_tag(s, st)) {
298 // the current rawvideo encoding system ends up setting
299 // the wrong codec_tag for avi/mov, we override it here
300 codec->codec_tag = 0;
302 if (codec->codec_tag) {
303 if (!validate_codec_tag(s, st)) {
304 char tagbuf[32], tagbuf2[32];
305 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), codec->codec_tag);
306 av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, codec->codec_id));
307 av_log(s, AV_LOG_ERROR,
308 "Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n",
309 tagbuf, codec->codec_tag, codec->codec_id, tagbuf2);
310 ret = AVERROR_INVALIDDATA;
314 codec->codec_tag = av_codec_get_tag(of->codec_tag, codec->codec_id);
317 if (of->flags & AVFMT_GLOBALHEADER &&
318 !(codec->flags & CODEC_FLAG_GLOBAL_HEADER))
319 av_log(s, AV_LOG_WARNING,
320 "Codec for stream %d does not use global headers "
321 "but container format requires global headers\n", i);
324 if (!s->priv_data && of->priv_data_size > 0) {
325 s->priv_data = av_mallocz(of->priv_data_size);
327 ret = AVERROR(ENOMEM);
330 if (of->priv_class) {
331 *(const AVClass **)s->priv_data = of->priv_class;
332 av_opt_set_defaults(s->priv_data);
333 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
338 /* set muxer identification string */
339 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
340 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
344 av_dict_free(options);
355 static int init_pts(AVFormatContext *s)
360 /* init PTS generation */
361 for (i = 0; i < s->nb_streams; i++) {
362 int64_t den = AV_NOPTS_VALUE;
365 switch (st->codec->codec_type) {
366 case AVMEDIA_TYPE_AUDIO:
367 den = (int64_t)st->time_base.num * st->codec->sample_rate;
369 case AVMEDIA_TYPE_VIDEO:
370 den = (int64_t)st->time_base.num * st->codec->time_base.den;
375 if (den != AV_NOPTS_VALUE) {
377 return AVERROR_INVALIDDATA;
379 frac_init(&st->pts, 0, 0, den);
386 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
390 if (ret = init_muxer(s, options))
393 if (s->oformat->write_header) {
394 ret = s->oformat->write_header(s);
395 if (ret >= 0 && s->pb && s->pb->error < 0)
401 if ((ret = init_pts(s)) < 0)
404 if (s->avoid_negative_ts < 0) {
405 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
406 s->avoid_negative_ts = 0;
408 s->avoid_negative_ts = 1;
414 //FIXME merge with compute_pkt_fields
415 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
417 int delay = FFMAX(st->codec->has_b_frames, st->codec->max_b_frames > 0);
418 int num, den, frame_size, i;
420 av_dlog(s, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
421 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
424 if (pkt->duration == 0) {
425 ff_compute_frame_duration(&num, &den, st, NULL, pkt);
427 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
431 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
434 //XXX/FIXME this is a temporary hack until all encoders output pts
435 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
438 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
442 // pkt->pts= st->cur_dts;
443 pkt->pts = st->pts.val;
446 //calculate dts from pts
447 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
448 st->pts_buffer[0] = pkt->pts;
449 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
450 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
451 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
452 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
454 pkt->dts = st->pts_buffer[0];
457 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
458 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
459 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
460 av_log(s, AV_LOG_ERROR,
461 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
462 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
463 return AVERROR(EINVAL);
465 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
466 av_log(s, AV_LOG_ERROR, "pts (%s) < dts (%s) in stream %d\n",
467 av_ts2str(pkt->pts), av_ts2str(pkt->dts), st->index);
468 return AVERROR(EINVAL);
471 av_dlog(s, "av_write_frame: pts2:%s dts2:%s\n",
472 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
473 st->cur_dts = pkt->dts;
474 st->pts.val = pkt->dts;
477 switch (st->codec->codec_type) {
478 case AVMEDIA_TYPE_AUDIO:
479 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 1);
481 /* HACK/FIXME, we skip the initial 0 size packets as they are most
482 * likely equal to the encoder delay, but it would be better if we
483 * had the real timestamps from the encoder */
484 if (frame_size >= 0 && (pkt->size || st->pts.num != st->pts.den >> 1 || st->pts.val)) {
485 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
488 case AVMEDIA_TYPE_VIDEO:
489 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
498 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
501 * FIXME: this function should NEVER get undefined pts/dts beside when the
502 * AVFMT_NOTIMESTAMPS is set.
503 * Those additional safety checks should be dropped once the correct checks
504 * are set in the callers.
506 static int write_packet(AVFormatContext *s, AVPacket *pkt)
510 if (s->avoid_negative_ts > 0) {
511 AVStream *st = s->streams[pkt->stream_index];
512 int64_t offset = st->mux_ts_offset;
514 if (pkt->dts < 0 && pkt->dts != AV_NOPTS_VALUE && !s->offset) {
515 s->offset = -pkt->dts;
516 s->offset_timebase = st->time_base;
519 if (s->offset && !offset) {
520 offset = st->mux_ts_offset =
521 av_rescale_q_rnd(s->offset,
527 if (pkt->dts != AV_NOPTS_VALUE)
529 if (pkt->pts != AV_NOPTS_VALUE)
532 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0);
535 did_split = av_packet_split_side_data(pkt);
536 ret = s->oformat->write_packet(s, pkt);
537 if (s->flush_packets && s->pb && s->pb->error >= 0)
540 av_packet_merge_side_data(pkt);
544 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
549 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
550 ret = s->oformat->write_packet(s, NULL);
551 if (s->flush_packets && s->pb && s->pb->error >= 0)
553 if (ret >= 0 && s->pb && s->pb->error < 0)
560 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
562 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
565 ret = write_packet(s, pkt);
566 if (ret >= 0 && s->pb && s->pb->error < 0)
570 s->streams[pkt->stream_index]->nb_frames++;
574 #define CHUNK_START 0x1000
576 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
577 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
579 AVPacketList **next_point, *this_pktl;
580 AVStream *st = s->streams[pkt->stream_index];
581 int chunked = s->max_chunk_size || s->max_chunk_duration;
583 this_pktl = av_mallocz(sizeof(AVPacketList));
585 return AVERROR(ENOMEM);
586 this_pktl->pkt = *pkt;
587 #if FF_API_DESTRUCT_PACKET
588 pkt->destruct = NULL; // do not free original but only the copy
591 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-allocated memory
592 av_copy_packet_side_data(&this_pktl->pkt, &this_pktl->pkt); // copy side data
594 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
595 next_point = &(st->last_in_packet_buffer->next);
597 next_point = &s->packet_buffer;
601 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
602 st->interleaver_chunk_size += pkt->size;
603 st->interleaver_chunk_duration += pkt->duration;
604 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
605 || (max && st->interleaver_chunk_duration > max)) {
606 st->interleaver_chunk_size = 0;
607 this_pktl->pkt.flags |= CHUNK_START;
608 if (max && st->interleaver_chunk_duration > max) {
609 int64_t syncoffset = (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
610 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
612 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
614 st->interleaver_chunk_duration = 0;
618 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
621 if (compare(s, &s->packet_buffer_end->pkt, pkt)) {
623 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
624 || !compare(s, &(*next_point)->pkt, pkt)))
625 next_point = &(*next_point)->next;
629 next_point = &(s->packet_buffer_end->next);
632 av_assert1(!*next_point);
634 s->packet_buffer_end = this_pktl;
637 this_pktl->next = *next_point;
639 s->streams[pkt->stream_index]->last_in_packet_buffer =
640 *next_point = this_pktl;
644 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
647 AVStream *st = s->streams[pkt->stream_index];
648 AVStream *st2 = s->streams[next->stream_index];
649 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
651 if (s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))) {
652 int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO);
653 int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO);
655 ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den
656 -( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den;
659 comp= (ts>ts2) - (ts<ts2);
663 return pkt->stream_index < next->stream_index;
667 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
668 AVPacket *pkt, int flush)
671 int stream_count = 0, noninterleaved_count = 0;
672 int64_t delta_dts_max = 0;
676 ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts);
681 for (i = 0; i < s->nb_streams; i++) {
682 if (s->streams[i]->last_in_packet_buffer) {
684 } else if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
685 ++noninterleaved_count;
689 if (s->nb_streams == stream_count) {
692 for (i=0; i < s->nb_streams; i++) {
693 if (s->streams[i]->last_in_packet_buffer) {
695 av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts,
696 s->streams[i]->time_base,
698 av_rescale_q(s->packet_buffer->pkt.dts,
699 s->streams[s->packet_buffer->pkt.stream_index]->time_base,
701 delta_dts_max= FFMAX(delta_dts_max, delta_dts);
704 if (s->nb_streams == stream_count+noninterleaved_count &&
705 delta_dts_max > 20*AV_TIME_BASE) {
706 av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count);
710 if (stream_count && flush) {
712 pktl = s->packet_buffer;
714 st = s->streams[out->stream_index];
716 s->packet_buffer = pktl->next;
717 if (!s->packet_buffer)
718 s->packet_buffer_end = NULL;
720 if (st->last_in_packet_buffer == pktl)
721 st->last_in_packet_buffer = NULL;
732 * Interleave an AVPacket correctly so it can be muxed.
733 * @param out the interleaved packet will be output here
734 * @param in the input packet
735 * @param flush 1 if no further packets are available as input and all
736 * remaining packets should be output
737 * @return 1 if a packet was output, 0 if no packet could be output,
738 * < 0 if an error occurred
740 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
742 if (s->oformat->interleave_packet) {
743 int ret = s->oformat->interleave_packet(s, out, in, flush);
748 return ff_interleave_packet_per_dts(s, out, in, flush);
751 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
756 AVStream *st = s->streams[pkt->stream_index];
758 //FIXME/XXX/HACK drop zero sized packets
759 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size == 0)
762 av_dlog(s, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
763 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
764 if ((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
767 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
768 return AVERROR(EINVAL);
770 av_dlog(s, "av_interleaved_write_frame FLUSH\n");
776 int ret = interleave_packet(s, &opkt, pkt, flush);
777 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
780 ret = write_packet(s, &opkt);
782 s->streams[opkt.stream_index]->nb_frames++;
784 av_free_packet(&opkt);
789 if(s->pb && s->pb->error)
794 int av_write_trailer(AVFormatContext *s)
800 ret = interleave_packet(s, &pkt, NULL, 1);
801 if (ret < 0) //FIXME cleanup needed for ret<0 ?
806 ret = write_packet(s, &pkt);
808 s->streams[pkt.stream_index]->nb_frames++;
810 av_free_packet(&pkt);
814 if(s->pb && s->pb->error)
818 if (s->oformat->write_trailer)
819 ret = s->oformat->write_trailer(s);
825 ret = s->pb ? s->pb->error : 0;
826 for (i = 0; i < s->nb_streams; i++) {
827 av_freep(&s->streams[i]->priv_data);
828 av_freep(&s->streams[i]->index_entries);
830 if (s->oformat->priv_class)
831 av_opt_free(s->priv_data);
832 av_freep(&s->priv_data);
836 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
837 int64_t *dts, int64_t *wall)
839 if (!s->oformat || !s->oformat->get_output_timestamp)
840 return AVERROR(ENOSYS);
841 s->oformat->get_output_timestamp(s, stream, dts, wall);
845 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
846 AVFormatContext *src)
851 local_pkt.stream_index = dst_stream;
852 if (pkt->pts != AV_NOPTS_VALUE)
853 local_pkt.pts = av_rescale_q(pkt->pts,
854 src->streams[pkt->stream_index]->time_base,
855 dst->streams[dst_stream]->time_base);
856 if (pkt->dts != AV_NOPTS_VALUE)
857 local_pkt.dts = av_rescale_q(pkt->dts,
858 src->streams[pkt->stream_index]->time_base,
859 dst->streams[dst_stream]->time_base);
861 local_pkt.duration = av_rescale_q(pkt->duration,
862 src->streams[pkt->stream_index]->time_base,
863 dst->streams[dst_stream]->time_base);
864 return av_write_frame(dst, &local_pkt);