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, ff_const59 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 #if FF_API_FORMAT_FILENAME
191 FF_DISABLE_DEPRECATION_WARNINGS
192 av_strlcpy(s->filename, filename, sizeof(s->filename));
193 FF_ENABLE_DEPRECATION_WARNINGS
195 if (!(s->url = av_strdup(filename)))
202 av_log(s, AV_LOG_ERROR, "Out of memory\n");
203 ret = AVERROR(ENOMEM);
205 avformat_free_context(s);
209 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
211 const AVCodecTag *avctag;
213 enum AVCodecID id = AV_CODEC_ID_NONE;
217 * Check that tag + id is in the table
218 * If neither is in the table -> OK
219 * If tag is in the table with another id -> FAIL
220 * If id is in the table with another tag -> FAIL unless strict < normal
222 for (n = 0; s->oformat->codec_tag[n]; n++) {
223 avctag = s->oformat->codec_tag[n];
224 while (avctag->id != AV_CODEC_ID_NONE) {
225 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
227 if (id == st->codecpar->codec_id)
230 if (avctag->id == st->codecpar->codec_id)
235 if (id != AV_CODEC_ID_NONE)
237 if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
243 static int init_muxer(AVFormatContext *s, AVDictionary **options)
247 AVDictionary *tmp = NULL;
248 AVCodecParameters *par = NULL;
249 const AVOutputFormat *of = s->oformat;
250 const AVCodecDescriptor *desc;
251 AVDictionaryEntry *e;
254 av_dict_copy(&tmp, *options, 0);
256 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
258 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
259 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
262 #if FF_API_FORMAT_FILENAME
263 FF_DISABLE_DEPRECATION_WARNINGS
264 if (!s->url && !(s->url = av_strdup(s->filename))) {
265 FF_ENABLE_DEPRECATION_WARNINGS
267 if (!s->url && !(s->url = av_strdup(""))) {
269 ret = AVERROR(ENOMEM);
273 #if FF_API_LAVF_AVCTX
274 FF_DISABLE_DEPRECATION_WARNINGS
275 if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
276 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
277 av_log(s, AV_LOG_WARNING,
278 "The AVFormatContext is not in set to bitexact mode, only "
279 "the AVCodecContext. If this is not intended, set "
280 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
283 FF_ENABLE_DEPRECATION_WARNINGS
286 // some sanity checks
287 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
288 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
289 ret = AVERROR(EINVAL);
293 for (i = 0; i < s->nb_streams; i++) {
297 #if FF_API_LAVF_AVCTX
298 FF_DISABLE_DEPRECATION_WARNINGS
299 if (st->codecpar->codec_type == AVMEDIA_TYPE_UNKNOWN &&
300 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
301 av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
302 "parameters to muxers is deprecated, use AVStream.codecpar "
304 ret = avcodec_parameters_from_context(st->codecpar, st->codec);
308 FF_ENABLE_DEPRECATION_WARNINGS
311 if (!st->time_base.num) {
312 /* fall back on the default timebase values */
313 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
314 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
316 avpriv_set_pts_info(st, 33, 1, 90000);
319 switch (par->codec_type) {
320 case AVMEDIA_TYPE_AUDIO:
321 if (par->sample_rate <= 0) {
322 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
323 ret = AVERROR(EINVAL);
326 if (!par->block_align)
327 par->block_align = par->channels *
328 av_get_bits_per_sample(par->codec_id) >> 3;
330 case AVMEDIA_TYPE_VIDEO:
331 if ((par->width <= 0 || par->height <= 0) &&
332 !(of->flags & AVFMT_NODIMENSIONS)) {
333 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
334 ret = AVERROR(EINVAL);
337 if (av_cmp_q(st->sample_aspect_ratio, par->sample_aspect_ratio)
338 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(par->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
340 if (st->sample_aspect_ratio.num != 0 &&
341 st->sample_aspect_ratio.den != 0 &&
342 par->sample_aspect_ratio.num != 0 &&
343 par->sample_aspect_ratio.den != 0) {
344 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
345 "(%d/%d) and encoder layer (%d/%d)\n",
346 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
347 par->sample_aspect_ratio.num,
348 par->sample_aspect_ratio.den);
349 ret = AVERROR(EINVAL);
356 desc = avcodec_descriptor_get(par->codec_id);
357 if (desc && desc->props & AV_CODEC_PROP_REORDER)
358 st->internal->reorder = 1;
362 && par->codec_id == AV_CODEC_ID_RAWVIDEO
363 && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
364 || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
365 && !validate_codec_tag(s, st)) {
366 // the current rawvideo encoding system ends up setting
367 // the wrong codec_tag for avi/mov, we override it here
370 if (par->codec_tag) {
371 if (!validate_codec_tag(s, st)) {
372 const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
373 av_log(s, AV_LOG_ERROR,
374 "Tag %s incompatible with output codec id '%d' (%s)\n",
375 av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
376 ret = AVERROR_INVALIDDATA;
380 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
383 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
384 s->internal->nb_interleaved_streams++;
387 if (!s->priv_data && of->priv_data_size > 0) {
388 s->priv_data = av_mallocz(of->priv_data_size);
390 ret = AVERROR(ENOMEM);
393 if (of->priv_class) {
394 *(const AVClass **)s->priv_data = of->priv_class;
395 av_opt_set_defaults(s->priv_data);
396 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
401 /* set muxer identification string */
402 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
403 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
405 av_dict_set(&s->metadata, "encoder", NULL, 0);
408 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
409 av_dict_set(&s->metadata, e->key, NULL, 0);
413 av_dict_free(options);
417 if (s->oformat->init) {
418 if ((ret = s->oformat->init(s)) < 0) {
419 if (s->oformat->deinit)
420 s->oformat->deinit(s);
433 static int init_pts(AVFormatContext *s)
438 /* init PTS generation */
439 for (i = 0; i < s->nb_streams; i++) {
440 int64_t den = AV_NOPTS_VALUE;
443 switch (st->codecpar->codec_type) {
444 case AVMEDIA_TYPE_AUDIO:
445 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
447 case AVMEDIA_TYPE_VIDEO:
448 den = (int64_t)st->time_base.num * st->time_base.den;
454 if (!st->internal->priv_pts)
455 st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
456 if (!st->internal->priv_pts)
457 return AVERROR(ENOMEM);
459 if (den != AV_NOPTS_VALUE) {
461 return AVERROR_INVALIDDATA;
463 frac_init(st->internal->priv_pts, 0, 0, den);
467 if (s->avoid_negative_ts < 0) {
468 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
469 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
470 s->avoid_negative_ts = 0;
472 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
478 static void flush_if_needed(AVFormatContext *s)
480 if (s->pb && s->pb->error >= 0) {
481 if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
483 else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
484 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
488 static void deinit_muxer(AVFormatContext *s)
490 if (s->oformat && s->oformat->deinit && s->internal->initialized)
491 s->oformat->deinit(s);
492 s->internal->initialized =
493 s->internal->streams_initialized = 0;
496 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
500 if ((ret = init_muxer(s, options)) < 0)
503 s->internal->initialized = 1;
504 s->internal->streams_initialized = ret;
506 if (s->oformat->init && ret) {
507 if ((ret = init_pts(s)) < 0)
510 return AVSTREAM_INIT_IN_INIT_OUTPUT;
513 return AVSTREAM_INIT_IN_WRITE_HEADER;
516 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
519 int already_initialized = s->internal->initialized;
520 int streams_already_initialized = s->internal->streams_initialized;
522 if (!already_initialized)
523 if ((ret = avformat_init_output(s, options)) < 0)
526 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
527 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
528 if (s->oformat->write_header) {
529 ret = s->oformat->write_header(s);
530 if (ret >= 0 && s->pb && s->pb->error < 0)
536 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
537 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
539 if (!s->internal->streams_initialized) {
540 if ((ret = init_pts(s)) < 0)
544 return streams_already_initialized;
551 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
553 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
554 it is only being used internally to this file as a consistency check.
555 The value is chosen to be very unlikely to appear on its own and to cause
556 immediate failure if used anywhere as a real size. */
557 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
560 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
561 FF_DISABLE_DEPRECATION_WARNINGS
562 //FIXME merge with compute_pkt_fields
563 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
565 int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
569 if (!s->internal->missing_ts_warning &&
570 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
571 (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC) || (st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) &&
572 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
573 av_log(s, AV_LOG_WARNING,
574 "Timestamps are unset in a packet for stream %d. "
575 "This is deprecated and will stop working in the future. "
576 "Fix your code to set the timestamps properly\n", st->index);
577 s->internal->missing_ts_warning = 1;
580 if (s->debug & FF_FDEBUG_TS)
581 av_log(s, AV_LOG_DEBUG, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
582 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
584 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
585 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
586 pkt->duration, pkt->stream_index);
591 if (pkt->duration == 0) {
592 ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
594 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
598 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
601 //XXX/FIXME this is a temporary hack until all encoders output pts
602 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
605 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
609 // pkt->pts= st->cur_dts;
610 pkt->pts = st->internal->priv_pts->val;
613 //calculate dts from pts
614 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
615 st->pts_buffer[0] = pkt->pts;
616 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
617 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
618 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
619 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
621 pkt->dts = st->pts_buffer[0];
624 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
625 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
626 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
627 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
628 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
629 av_log(s, AV_LOG_ERROR,
630 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
631 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
632 return AVERROR(EINVAL);
634 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
635 av_log(s, AV_LOG_ERROR,
636 "pts (%s) < dts (%s) in stream %d\n",
637 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
639 return AVERROR(EINVAL);
642 if (s->debug & FF_FDEBUG_TS)
643 av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n",
644 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
646 st->cur_dts = pkt->dts;
647 st->internal->priv_pts->val = pkt->dts;
650 switch (st->codecpar->codec_type) {
651 case AVMEDIA_TYPE_AUDIO:
652 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
653 ((AVFrame *)pkt->data)->nb_samples :
654 av_get_audio_frame_duration(st->codec, pkt->size);
656 /* HACK/FIXME, we skip the initial 0 size packets as they are most
657 * likely equal to the encoder delay, but it would be better if we
658 * had the real timestamps from the encoder */
659 if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
660 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
663 case AVMEDIA_TYPE_VIDEO:
664 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
669 FF_ENABLE_DEPRECATION_WARNINGS
673 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
676 * FIXME: this function should NEVER get undefined pts/dts beside when the
677 * AVFMT_NOTIMESTAMPS is set.
678 * Those additional safety checks should be dropped once the correct checks
679 * are set in the callers.
681 static int write_packet(AVFormatContext *s, AVPacket *pkt)
684 int64_t pts_backup, dts_backup;
686 pts_backup = pkt->pts;
687 dts_backup = pkt->dts;
689 // If the timestamp offsetting below is adjusted, adjust
690 // ff_interleaved_peek similarly.
691 if (s->output_ts_offset) {
692 AVStream *st = s->streams[pkt->stream_index];
693 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
695 if (pkt->dts != AV_NOPTS_VALUE)
697 if (pkt->pts != AV_NOPTS_VALUE)
701 if (s->avoid_negative_ts > 0) {
702 AVStream *st = s->streams[pkt->stream_index];
703 int64_t offset = st->mux_ts_offset;
704 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
706 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
707 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
708 s->internal->offset = -ts;
709 s->internal->offset_timebase = st->time_base;
712 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
713 offset = st->mux_ts_offset =
714 av_rescale_q_rnd(s->internal->offset,
715 s->internal->offset_timebase,
720 if (pkt->dts != AV_NOPTS_VALUE)
722 if (pkt->pts != AV_NOPTS_VALUE)
725 if (s->internal->avoid_negative_ts_use_pts) {
726 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
727 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
728 "pts %s in stream %d.\n"
729 "Try -avoid_negative_ts 1 as a possible workaround.\n",
735 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
736 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
737 av_log(s, AV_LOG_WARNING,
738 "Packets poorly interleaved, failed to avoid negative "
739 "timestamp %s in stream %d.\n"
740 "Try -max_interleave_delta 0 as a possible workaround.\n",
748 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
749 AVFrame *frame = (AVFrame *)pkt->data;
750 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
751 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, &frame, 0);
752 av_frame_free(&frame);
754 ret = s->oformat->write_packet(s, pkt);
757 if (s->pb && ret >= 0) {
759 if (s->pb->error < 0)
764 pkt->pts = pts_backup;
765 pkt->dts = dts_backup;
771 static int check_packet(AVFormatContext *s, AVPacket *pkt)
776 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
777 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
779 return AVERROR(EINVAL);
782 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
783 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
784 return AVERROR(EINVAL);
790 static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
794 ret = check_packet(s, pkt);
798 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
799 /* sanitize the timestamps */
800 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
801 AVStream *st = s->streams[pkt->stream_index];
803 /* when there is no reordering (so dts is equal to pts), but
804 * only one of them is set, set the other as well */
805 if (!st->internal->reorder) {
806 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
808 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
812 /* check that the timestamps are set */
813 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
814 av_log(s, AV_LOG_ERROR,
815 "Timestamps are unset in a packet for stream %d\n", st->index);
816 return AVERROR(EINVAL);
819 /* check that the dts are increasing (or at least non-decreasing,
820 * if the format allows it */
821 if (st->cur_dts != AV_NOPTS_VALUE &&
822 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
823 st->cur_dts > pkt->dts)) {
824 av_log(s, AV_LOG_ERROR,
825 "Application provided invalid, non monotonically increasing "
826 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
827 st->index, st->cur_dts, pkt->dts);
828 return AVERROR(EINVAL);
831 if (pkt->pts < pkt->dts) {
832 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
833 pkt->pts, pkt->dts, st->index);
834 return AVERROR(EINVAL);
842 static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt) {
843 AVStream *st = s->streams[pkt->stream_index];
846 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
849 if (s->oformat->check_bitstream) {
850 if (!st->internal->bitstream_checked) {
851 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
854 st->internal->bitstream_checked = 1;
858 for (i = 0; i < st->internal->nb_bsfcs; i++) {
859 AVBSFContext *ctx = st->internal->bsfcs[i];
860 // TODO: when any bitstream filter requires flushing at EOF, we'll need to
861 // flush each stream's BSF chain on write_trailer.
862 if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
863 av_log(ctx, AV_LOG_ERROR,
864 "Failed to send packet to filter %s for stream %d\n",
865 ctx->filter->name, pkt->stream_index);
868 // TODO: when any automatically-added bitstream filter is generating multiple
869 // output packets for a single input one, we'll need to call this in a loop
870 // and write each output packet.
871 if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
872 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
874 av_log(ctx, AV_LOG_ERROR,
875 "Failed to receive packet from filter %s for stream %d\n",
876 ctx->filter->name, pkt->stream_index);
877 if (s->error_recognition & AV_EF_EXPLODE)
885 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
889 ret = prepare_input_packet(s, pkt);
894 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
895 ret = s->oformat->write_packet(s, NULL);
897 if (ret >= 0 && s->pb && s->pb->error < 0)
904 ret = do_packet_auto_bsf(s, pkt);
908 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
909 ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
911 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
915 ret = write_packet(s, pkt);
916 if (ret >= 0 && s->pb && s->pb->error < 0)
920 s->streams[pkt->stream_index]->nb_frames++;
924 #define CHUNK_START 0x1000
926 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
927 int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
930 AVPacketList **next_point, *this_pktl;
931 AVStream *st = s->streams[pkt->stream_index];
932 int chunked = s->max_chunk_size || s->max_chunk_duration;
934 this_pktl = av_mallocz(sizeof(AVPacketList));
936 return AVERROR(ENOMEM);
937 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
938 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
939 av_assert0(((AVFrame *)pkt->data)->buf);
940 this_pktl->pkt = *pkt;
942 pkt->side_data = NULL;
943 pkt->side_data_elems = 0;
945 if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
951 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
952 next_point = &(st->last_in_packet_buffer->next);
954 next_point = &s->internal->packet_buffer;
958 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
959 st->interleaver_chunk_size += pkt->size;
960 st->interleaver_chunk_duration += pkt->duration;
961 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
962 || (max && st->interleaver_chunk_duration > max)) {
963 st->interleaver_chunk_size = 0;
964 this_pktl->pkt.flags |= CHUNK_START;
965 if (max && st->interleaver_chunk_duration > max) {
966 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
967 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
969 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
971 st->interleaver_chunk_duration = 0;
975 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
978 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
980 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
981 || !compare(s, &(*next_point)->pkt, pkt)))
982 next_point = &(*next_point)->next;
986 next_point = &(s->internal->packet_buffer_end->next);
989 av_assert1(!*next_point);
991 s->internal->packet_buffer_end = this_pktl;
994 this_pktl->next = *next_point;
996 s->streams[pkt->stream_index]->last_in_packet_buffer =
997 *next_point = this_pktl;
999 av_packet_unref(pkt);
1004 static int interleave_compare_dts(AVFormatContext *s, const AVPacket *next,
1005 const AVPacket *pkt)
1007 AVStream *st = s->streams[pkt->stream_index];
1008 AVStream *st2 = s->streams[next->stream_index];
1009 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1011 if (s->audio_preload) {
1012 int preload = st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
1013 int preload2 = st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
1014 if (preload != preload2) {
1016 preload *= s->audio_preload;
1017 preload2 *= s->audio_preload;
1018 ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - preload;
1019 ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - preload2;
1021 ts = ((uint64_t)pkt ->dts*st ->time_base.num*AV_TIME_BASE - (uint64_t)preload *st ->time_base.den)*st2->time_base.den
1022 - ((uint64_t)next->dts*st2->time_base.num*AV_TIME_BASE - (uint64_t)preload2*st2->time_base.den)*st ->time_base.den;
1025 comp = (ts2 > ts) - (ts2 < ts);
1030 return pkt->stream_index < next->stream_index;
1034 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1035 AVPacket *pkt, int flush)
1038 int stream_count = 0;
1039 int noninterleaved_count = 0;
1044 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
1048 for (i = 0; i < s->nb_streams; i++) {
1049 if (s->streams[i]->last_in_packet_buffer) {
1051 } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
1052 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP8 &&
1053 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP9) {
1054 ++noninterleaved_count;
1058 if (s->internal->nb_interleaved_streams == stream_count)
1061 if (s->max_interleave_delta > 0 &&
1062 s->internal->packet_buffer &&
1064 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
1066 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1067 int64_t delta_dts = INT64_MIN;
1068 int64_t top_dts = av_rescale_q(top_pkt->dts,
1069 s->streams[top_pkt->stream_index]->time_base,
1072 for (i = 0; i < s->nb_streams; i++) {
1074 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
1079 last_dts = av_rescale_q(last->pkt.dts,
1080 s->streams[i]->time_base,
1082 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
1085 if (delta_dts > s->max_interleave_delta) {
1086 av_log(s, AV_LOG_DEBUG,
1087 "Delay between the first packet and last packet in the "
1088 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
1089 delta_dts, s->max_interleave_delta);
1094 if (s->internal->packet_buffer &&
1096 (s->flags & AVFMT_FLAG_SHORTEST) &&
1097 s->internal->shortest_end == AV_NOPTS_VALUE) {
1098 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1100 s->internal->shortest_end = av_rescale_q(top_pkt->dts,
1101 s->streams[top_pkt->stream_index]->time_base,
1105 if (s->internal->shortest_end != AV_NOPTS_VALUE) {
1106 while (s->internal->packet_buffer) {
1107 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
1109 int64_t top_dts = av_rescale_q(top_pkt->dts,
1110 s->streams[top_pkt->stream_index]->time_base,
1113 if (s->internal->shortest_end + 1 >= top_dts)
1116 pktl = s->internal->packet_buffer;
1117 st = s->streams[pktl->pkt.stream_index];
1119 s->internal->packet_buffer = pktl->next;
1120 if (!s->internal->packet_buffer)
1121 s->internal->packet_buffer_end = NULL;
1123 if (st->last_in_packet_buffer == pktl)
1124 st->last_in_packet_buffer = NULL;
1126 av_packet_unref(&pktl->pkt);
1132 if (stream_count && flush) {
1134 pktl = s->internal->packet_buffer;
1136 st = s->streams[out->stream_index];
1138 s->internal->packet_buffer = pktl->next;
1139 if (!s->internal->packet_buffer)
1140 s->internal->packet_buffer_end = NULL;
1142 if (st->last_in_packet_buffer == pktl)
1143 st->last_in_packet_buffer = NULL;
1148 av_init_packet(out);
1153 int ff_interleaved_peek(AVFormatContext *s, int stream,
1154 AVPacket *pkt, int add_offset)
1156 AVPacketList *pktl = s->internal->packet_buffer;
1158 if (pktl->pkt.stream_index == stream) {
1161 AVStream *st = s->streams[pkt->stream_index];
1162 int64_t offset = st->mux_ts_offset;
1164 if (s->output_ts_offset)
1165 offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1167 if (pkt->dts != AV_NOPTS_VALUE)
1169 if (pkt->pts != AV_NOPTS_VALUE)
1176 return AVERROR(ENOENT);
1180 * Interleave an AVPacket correctly so it can be muxed.
1181 * @param out the interleaved packet will be output here
1182 * @param in the input packet
1183 * @param flush 1 if no further packets are available as input and all
1184 * remaining packets should be output
1185 * @return 1 if a packet was output, 0 if no packet could be output,
1186 * < 0 if an error occurred
1188 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1190 if (s->oformat->interleave_packet) {
1191 int ret = s->oformat->interleave_packet(s, out, in, flush);
1193 av_packet_unref(in);
1196 return ff_interleave_packet_per_dts(s, out, in, flush);
1199 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1203 ret = prepare_input_packet(s, pkt);
1208 AVStream *st = s->streams[pkt->stream_index];
1210 ret = do_packet_auto_bsf(s, pkt);
1216 if (s->debug & FF_FDEBUG_TS)
1217 av_log(s, AV_LOG_DEBUG, "av_interleaved_write_frame size:%d dts:%s pts:%s\n",
1218 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1220 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
1221 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1225 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
1226 ret = AVERROR(EINVAL);
1230 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1236 int ret = interleave_packet(s, &opkt, pkt, flush);
1238 memset(pkt, 0, sizeof(*pkt));
1239 av_init_packet(pkt);
1242 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
1245 ret = write_packet(s, &opkt);
1247 s->streams[opkt.stream_index]->nb_frames++;
1249 av_packet_unref(&opkt);
1253 if(s->pb && s->pb->error)
1254 return s->pb->error;
1257 av_packet_unref(pkt);
1261 int av_write_trailer(AVFormatContext *s)
1267 ret = interleave_packet(s, &pkt, NULL, 1);
1273 ret = write_packet(s, &pkt);
1275 s->streams[pkt.stream_index]->nb_frames++;
1277 av_packet_unref(&pkt);
1281 if(s->pb && s->pb->error)
1286 if (s->oformat->write_trailer) {
1287 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1288 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1290 ret = s->oformat->write_trailer(s);
1292 s->oformat->write_trailer(s);
1301 ret = s->pb ? s->pb->error : 0;
1302 for (i = 0; i < s->nb_streams; i++) {
1303 av_freep(&s->streams[i]->priv_data);
1304 av_freep(&s->streams[i]->index_entries);
1306 if (s->oformat->priv_class)
1307 av_opt_free(s->priv_data);
1308 av_freep(&s->priv_data);
1312 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1313 int64_t *dts, int64_t *wall)
1315 if (!s->oformat || !s->oformat->get_output_timestamp)
1316 return AVERROR(ENOSYS);
1317 s->oformat->get_output_timestamp(s, stream, dts, wall);
1321 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1322 AVFormatContext *src, int interleave)
1328 local_pkt.stream_index = dst_stream;
1330 av_packet_rescale_ts(&local_pkt,
1331 src->streams[pkt->stream_index]->time_base,
1332 dst->streams[dst_stream]->time_base);
1334 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1335 else ret = av_write_frame(dst, &local_pkt);
1336 pkt->buf = local_pkt.buf;
1337 pkt->side_data = local_pkt.side_data;
1338 pkt->side_data_elems = local_pkt.side_data_elems;
1342 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1343 AVFrame *frame, int interleaved)
1345 AVPacket pkt, *pktp;
1347 av_assert0(s->oformat);
1348 if (!s->oformat->write_uncoded_frame)
1349 return AVERROR(ENOSYS);
1355 av_init_packet(&pkt);
1356 pkt.data = (void *)frame;
1357 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1359 pkt.dts = frame->pts;
1360 pkt.duration = frame->pkt_duration;
1361 pkt.stream_index = stream_index;
1362 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1365 return interleaved ? av_interleaved_write_frame(s, pktp) :
1366 av_write_frame(s, pktp);
1369 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1372 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1375 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1378 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1381 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1383 av_assert0(s->oformat);
1384 if (!s->oformat->write_uncoded_frame)
1385 return AVERROR(ENOSYS);
1386 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1387 AV_WRITE_UNCODED_FRAME_QUERY);