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 av_log(s, AV_LOG_WARNING,
259 "The AVFormatContext is not in set to bitexact mode, only "
260 "the AVCodecContext. If this is not intended, set "
261 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
264 FF_ENABLE_DEPRECATION_WARNINGS
267 // some sanity checks
268 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
269 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
270 ret = AVERROR(EINVAL);
274 for (i = 0; i < s->nb_streams; i++) {
278 #if FF_API_LAVF_AVCTX
279 FF_DISABLE_DEPRECATION_WARNINGS
280 if (st->codecpar->codec_type == AVMEDIA_TYPE_UNKNOWN &&
281 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
282 av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
283 "parameters to muxers is deprecated, use AVStream.codecpar "
285 ret = avcodec_parameters_from_context(st->codecpar, st->codec);
289 FF_ENABLE_DEPRECATION_WARNINGS
292 if (!st->time_base.num) {
293 /* fall back on the default timebase values */
294 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
295 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
297 avpriv_set_pts_info(st, 33, 1, 90000);
300 switch (par->codec_type) {
301 case AVMEDIA_TYPE_AUDIO:
302 if (par->sample_rate <= 0) {
303 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
304 ret = AVERROR(EINVAL);
307 if (!par->block_align)
308 par->block_align = par->channels *
309 av_get_bits_per_sample(par->codec_id) >> 3;
311 case AVMEDIA_TYPE_VIDEO:
312 if ((par->width <= 0 || par->height <= 0) &&
313 !(of->flags & AVFMT_NODIMENSIONS)) {
314 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
315 ret = AVERROR(EINVAL);
318 if (av_cmp_q(st->sample_aspect_ratio, par->sample_aspect_ratio)
319 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(par->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
321 if (st->sample_aspect_ratio.num != 0 &&
322 st->sample_aspect_ratio.den != 0 &&
323 par->sample_aspect_ratio.num != 0 &&
324 par->sample_aspect_ratio.den != 0) {
325 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
326 "(%d/%d) and encoder layer (%d/%d)\n",
327 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
328 par->sample_aspect_ratio.num,
329 par->sample_aspect_ratio.den);
330 ret = AVERROR(EINVAL);
337 desc = avcodec_descriptor_get(par->codec_id);
338 if (desc && desc->props & AV_CODEC_PROP_REORDER)
339 st->internal->reorder = 1;
343 && par->codec_id == AV_CODEC_ID_RAWVIDEO
344 && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
345 || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
346 && !validate_codec_tag(s, st)) {
347 // the current rawvideo encoding system ends up setting
348 // the wrong codec_tag for avi/mov, we override it here
351 if (par->codec_tag) {
352 if (!validate_codec_tag(s, st)) {
353 const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
354 av_log(s, AV_LOG_ERROR,
355 "Tag %s incompatible with output codec id '%d' (%s)\n",
356 av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
357 ret = AVERROR_INVALIDDATA;
361 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
364 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
365 s->internal->nb_interleaved_streams++;
368 if (!s->priv_data && of->priv_data_size > 0) {
369 s->priv_data = av_mallocz(of->priv_data_size);
371 ret = AVERROR(ENOMEM);
374 if (of->priv_class) {
375 *(const AVClass **)s->priv_data = of->priv_class;
376 av_opt_set_defaults(s->priv_data);
377 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
382 /* set muxer identification string */
383 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
384 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
386 av_dict_set(&s->metadata, "encoder", NULL, 0);
389 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
390 av_dict_set(&s->metadata, e->key, NULL, 0);
394 av_dict_free(options);
398 if (s->oformat->init) {
399 if ((ret = s->oformat->init(s)) < 0) {
400 if (s->oformat->deinit)
401 s->oformat->deinit(s);
414 static int init_pts(AVFormatContext *s)
419 /* init PTS generation */
420 for (i = 0; i < s->nb_streams; i++) {
421 int64_t den = AV_NOPTS_VALUE;
424 switch (st->codecpar->codec_type) {
425 case AVMEDIA_TYPE_AUDIO:
426 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
428 case AVMEDIA_TYPE_VIDEO:
429 den = (int64_t)st->time_base.num * st->time_base.den;
435 if (!st->internal->priv_pts)
436 st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
437 if (!st->internal->priv_pts)
438 return AVERROR(ENOMEM);
440 if (den != AV_NOPTS_VALUE) {
442 return AVERROR_INVALIDDATA;
444 frac_init(st->internal->priv_pts, 0, 0, den);
451 static void flush_if_needed(AVFormatContext *s)
453 if (s->pb && s->pb->error >= 0) {
454 if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
456 else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
457 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
461 static int write_header_internal(AVFormatContext *s)
463 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
464 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
465 if (s->oformat->write_header) {
466 int ret = s->oformat->write_header(s);
467 if (ret >= 0 && s->pb && s->pb->error < 0)
469 s->internal->write_header_ret = ret;
474 s->internal->header_written = 1;
475 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
476 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
480 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
484 if ((ret = init_muxer(s, options)) < 0)
487 s->internal->initialized = 1;
488 s->internal->streams_initialized = ret;
490 if (s->oformat->init && ret) {
491 if ((ret = init_pts(s)) < 0)
494 if (s->avoid_negative_ts < 0) {
495 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
496 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
497 s->avoid_negative_ts = 0;
499 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
502 return AVSTREAM_INIT_IN_INIT_OUTPUT;
505 return AVSTREAM_INIT_IN_WRITE_HEADER;
508 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
511 int already_initialized = s->internal->initialized;
512 int streams_already_initialized = s->internal->streams_initialized;
514 if (!already_initialized)
515 if ((ret = avformat_init_output(s, options)) < 0)
518 if (!(s->oformat->check_bitstream && s->flags & AVFMT_FLAG_AUTO_BSF)) {
519 ret = write_header_internal(s);
524 if (!s->internal->streams_initialized) {
525 if ((ret = init_pts(s)) < 0)
528 if (s->avoid_negative_ts < 0) {
529 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
530 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
531 s->avoid_negative_ts = 0;
533 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
537 return streams_already_initialized;
540 if (s->oformat->deinit)
541 s->oformat->deinit(s);
545 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
547 /* Note: using sizeof(AVFrame) from outside lavu is unsafe in general, but
548 it is only being used internally to this file as a consistency check.
549 The value is chosen to be very unlikely to appear on its own and to cause
550 immediate failure if used anywhere as a real size. */
551 #define UNCODED_FRAME_PACKET_SIZE (INT_MIN / 3 * 2 + (int)sizeof(AVFrame))
554 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
555 FF_DISABLE_DEPRECATION_WARNINGS
556 //FIXME merge with compute_pkt_fields
557 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
559 int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
563 if (!s->internal->missing_ts_warning &&
564 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
565 (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC) || (st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) &&
566 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
567 av_log(s, AV_LOG_WARNING,
568 "Timestamps are unset in a packet for stream %d. "
569 "This is deprecated and will stop working in the future. "
570 "Fix your code to set the timestamps properly\n", st->index);
571 s->internal->missing_ts_warning = 1;
574 if (s->debug & FF_FDEBUG_TS)
575 av_log(s, AV_LOG_TRACE, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
576 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
578 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
579 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
580 pkt->duration, pkt->stream_index);
585 if (pkt->duration == 0) {
586 ff_compute_frame_duration(s, &num, &den, st, NULL, pkt);
588 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
592 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
595 //XXX/FIXME this is a temporary hack until all encoders output pts
596 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
599 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
603 // pkt->pts= st->cur_dts;
604 pkt->pts = st->internal->priv_pts->val;
607 //calculate dts from pts
608 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
609 st->pts_buffer[0] = pkt->pts;
610 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
611 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
612 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
613 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
615 pkt->dts = st->pts_buffer[0];
618 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
619 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
620 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
621 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
622 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
623 av_log(s, AV_LOG_ERROR,
624 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
625 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
626 return AVERROR(EINVAL);
628 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
629 av_log(s, AV_LOG_ERROR,
630 "pts (%s) < dts (%s) in stream %d\n",
631 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
633 return AVERROR(EINVAL);
636 if (s->debug & FF_FDEBUG_TS)
637 av_log(s, AV_LOG_TRACE, "av_write_frame: pts2:%s dts2:%s\n",
638 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
640 st->cur_dts = pkt->dts;
641 st->internal->priv_pts->val = pkt->dts;
644 switch (st->codecpar->codec_type) {
645 case AVMEDIA_TYPE_AUDIO:
646 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
647 ((AVFrame *)pkt->data)->nb_samples :
648 av_get_audio_frame_duration(st->codec, pkt->size);
650 /* HACK/FIXME, we skip the initial 0 size packets as they are most
651 * likely equal to the encoder delay, but it would be better if we
652 * had the real timestamps from the encoder */
653 if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
654 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
657 case AVMEDIA_TYPE_VIDEO:
658 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
663 FF_ENABLE_DEPRECATION_WARNINGS
667 * Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore
670 * FIXME: this function should NEVER get undefined pts/dts beside when the
671 * AVFMT_NOTIMESTAMPS is set.
672 * Those additional safety checks should be dropped once the correct checks
673 * are set in the callers.
675 static int write_packet(AVFormatContext *s, AVPacket *pkt)
678 int64_t pts_backup, dts_backup;
680 pts_backup = pkt->pts;
681 dts_backup = pkt->dts;
683 // If the timestamp offsetting below is adjusted, adjust
684 // ff_interleaved_peek similarly.
685 if (s->output_ts_offset) {
686 AVStream *st = s->streams[pkt->stream_index];
687 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
689 if (pkt->dts != AV_NOPTS_VALUE)
691 if (pkt->pts != AV_NOPTS_VALUE)
695 if (s->avoid_negative_ts > 0) {
696 AVStream *st = s->streams[pkt->stream_index];
697 int64_t offset = st->mux_ts_offset;
698 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
700 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
701 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
702 s->internal->offset = -ts;
703 s->internal->offset_timebase = st->time_base;
706 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
707 offset = st->mux_ts_offset =
708 av_rescale_q_rnd(s->internal->offset,
709 s->internal->offset_timebase,
714 if (pkt->dts != AV_NOPTS_VALUE)
716 if (pkt->pts != AV_NOPTS_VALUE)
719 if (s->internal->avoid_negative_ts_use_pts) {
720 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
721 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
722 "pts %s in stream %d.\n"
723 "Try -avoid_negative_ts 1 as a possible workaround.\n",
729 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
730 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
731 av_log(s, AV_LOG_WARNING,
732 "Packets poorly interleaved, failed to avoid negative "
733 "timestamp %s in stream %d.\n"
734 "Try -max_interleave_delta 0 as a possible workaround.\n",
742 if (!s->internal->header_written) {
743 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
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)
766 pkt->pts = pts_backup;
767 pkt->dts = dts_backup;
773 static int check_packet(AVFormatContext *s, AVPacket *pkt)
778 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
779 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
781 return AVERROR(EINVAL);
784 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
785 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
786 return AVERROR(EINVAL);
792 static int prepare_input_packet(AVFormatContext *s, AVPacket *pkt)
796 ret = check_packet(s, pkt);
800 #if !FF_API_COMPUTE_PKT_FIELDS2 || !FF_API_LAVF_AVCTX
801 /* sanitize the timestamps */
802 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
803 AVStream *st = s->streams[pkt->stream_index];
805 /* when there is no reordering (so dts is equal to pts), but
806 * only one of them is set, set the other as well */
807 if (!st->internal->reorder) {
808 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
810 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
814 /* check that the timestamps are set */
815 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
816 av_log(s, AV_LOG_ERROR,
817 "Timestamps are unset in a packet for stream %d\n", st->index);
818 return AVERROR(EINVAL);
821 /* check that the dts are increasing (or at least non-decreasing,
822 * if the format allows it */
823 if (st->cur_dts != AV_NOPTS_VALUE &&
824 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
825 st->cur_dts > pkt->dts)) {
826 av_log(s, AV_LOG_ERROR,
827 "Application provided invalid, non monotonically increasing "
828 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
829 st->index, st->cur_dts, pkt->dts);
830 return AVERROR(EINVAL);
833 if (pkt->pts < pkt->dts) {
834 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
835 pkt->pts, pkt->dts, st->index);
836 return AVERROR(EINVAL);
844 static int do_packet_auto_bsf(AVFormatContext *s, AVPacket *pkt) {
845 AVStream *st = s->streams[pkt->stream_index];
848 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
851 if (s->oformat->check_bitstream) {
852 if (!st->internal->bitstream_checked) {
853 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
856 st->internal->bitstream_checked = 1;
860 for (i = 0; i < st->internal->nb_bsfcs; i++) {
861 AVBSFContext *ctx = st->internal->bsfcs[i];
862 // TODO: when any bitstream filter requires flushing at EOF, we'll need to
863 // flush each stream's BSF chain on write_trailer.
864 if ((ret = av_bsf_send_packet(ctx, pkt)) < 0) {
865 av_log(ctx, AV_LOG_ERROR,
866 "Failed to send packet to filter %s for stream %d\n",
867 ctx->filter->name, pkt->stream_index);
870 // TODO: when any automatically-added bitstream filter is generating multiple
871 // output packets for a single input one, we'll need to call this in a loop
872 // and write each output packet.
873 if ((ret = av_bsf_receive_packet(ctx, pkt)) < 0) {
874 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
876 av_log(ctx, AV_LOG_ERROR,
877 "Failed to send packet to filter %s for stream %d\n",
878 ctx->filter->name, pkt->stream_index);
879 if (s->error_recognition & AV_EF_EXPLODE)
887 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
891 ret = prepare_input_packet(s, pkt);
896 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
897 if (!s->internal->header_written) {
898 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
902 ret = s->oformat->write_packet(s, NULL);
904 if (ret >= 0 && s->pb && s->pb->error < 0)
911 ret = do_packet_auto_bsf(s, pkt);
915 #if FF_API_COMPUTE_PKT_FIELDS2 && FF_API_LAVF_AVCTX
916 ret = compute_muxer_pkt_fields(s, s->streams[pkt->stream_index], pkt);
918 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
922 ret = write_packet(s, pkt);
923 if (ret >= 0 && s->pb && s->pb->error < 0)
927 s->streams[pkt->stream_index]->nb_frames++;
931 #define CHUNK_START 0x1000
933 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
934 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
937 AVPacketList **next_point, *this_pktl;
938 AVStream *st = s->streams[pkt->stream_index];
939 int chunked = s->max_chunk_size || s->max_chunk_duration;
941 this_pktl = av_mallocz(sizeof(AVPacketList));
943 return AVERROR(ENOMEM);
944 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
945 av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
946 av_assert0(((AVFrame *)pkt->data)->buf);
947 this_pktl->pkt = *pkt;
949 pkt->side_data = NULL;
950 pkt->side_data_elems = 0;
952 if ((ret = av_packet_ref(&this_pktl->pkt, pkt)) < 0) {
958 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
959 next_point = &(st->last_in_packet_buffer->next);
961 next_point = &s->internal->packet_buffer;
965 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
966 st->interleaver_chunk_size += pkt->size;
967 st->interleaver_chunk_duration += pkt->duration;
968 if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size)
969 || (max && st->interleaver_chunk_duration > max)) {
970 st->interleaver_chunk_size = 0;
971 this_pktl->pkt.flags |= CHUNK_START;
972 if (max && st->interleaver_chunk_duration > max) {
973 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
974 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
976 st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
978 st->interleaver_chunk_duration = 0;
982 if (chunked && !(this_pktl->pkt.flags & CHUNK_START))
985 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
987 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
988 || !compare(s, &(*next_point)->pkt, pkt)))
989 next_point = &(*next_point)->next;
993 next_point = &(s->internal->packet_buffer_end->next);
996 av_assert1(!*next_point);
998 s->internal->packet_buffer_end = this_pktl;
1001 this_pktl->next = *next_point;
1003 s->streams[pkt->stream_index]->last_in_packet_buffer =
1004 *next_point = this_pktl;
1006 av_packet_unref(pkt);
1011 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
1014 AVStream *st = s->streams[pkt->stream_index];
1015 AVStream *st2 = s->streams[next->stream_index];
1016 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
1018 if (s->audio_preload && ((st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO))) {
1019 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);
1020 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);
1022 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
1023 -( 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;
1026 comp= (ts>ts2) - (ts<ts2);
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_TRACE, "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)
1285 if (!s->internal->header_written) {
1286 ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
1292 if (s->internal->header_written && s->oformat->write_trailer) {
1293 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1294 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1296 ret = s->oformat->write_trailer(s);
1298 s->oformat->write_trailer(s);
1302 if (s->oformat->deinit)
1303 s->oformat->deinit(s);
1305 s->internal->header_written =
1306 s->internal->initialized =
1307 s->internal->streams_initialized = 0;
1312 ret = s->pb ? s->pb->error : 0;
1313 for (i = 0; i < s->nb_streams; i++) {
1314 av_freep(&s->streams[i]->priv_data);
1315 av_freep(&s->streams[i]->index_entries);
1317 if (s->oformat->priv_class)
1318 av_opt_free(s->priv_data);
1319 av_freep(&s->priv_data);
1323 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1324 int64_t *dts, int64_t *wall)
1326 if (!s->oformat || !s->oformat->get_output_timestamp)
1327 return AVERROR(ENOSYS);
1328 s->oformat->get_output_timestamp(s, stream, dts, wall);
1332 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1333 AVFormatContext *src, int interleave)
1339 local_pkt.stream_index = dst_stream;
1340 if (pkt->pts != AV_NOPTS_VALUE)
1341 local_pkt.pts = av_rescale_q(pkt->pts,
1342 src->streams[pkt->stream_index]->time_base,
1343 dst->streams[dst_stream]->time_base);
1344 if (pkt->dts != AV_NOPTS_VALUE)
1345 local_pkt.dts = av_rescale_q(pkt->dts,
1346 src->streams[pkt->stream_index]->time_base,
1347 dst->streams[dst_stream]->time_base);
1349 local_pkt.duration = av_rescale_q(pkt->duration,
1350 src->streams[pkt->stream_index]->time_base,
1351 dst->streams[dst_stream]->time_base);
1353 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1354 else ret = av_write_frame(dst, &local_pkt);
1355 pkt->buf = local_pkt.buf;
1356 pkt->side_data = local_pkt.side_data;
1357 pkt->side_data_elems = local_pkt.side_data_elems;
1361 static int av_write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1362 AVFrame *frame, int interleaved)
1364 AVPacket pkt, *pktp;
1366 av_assert0(s->oformat);
1367 if (!s->oformat->write_uncoded_frame)
1368 return AVERROR(ENOSYS);
1374 av_init_packet(&pkt);
1375 pkt.data = (void *)frame;
1376 pkt.size = UNCODED_FRAME_PACKET_SIZE;
1378 pkt.dts = frame->pts;
1379 pkt.duration = frame->pkt_duration;
1380 pkt.stream_index = stream_index;
1381 pkt.flags |= AV_PKT_FLAG_UNCODED_FRAME;
1384 return interleaved ? av_interleaved_write_frame(s, pktp) :
1385 av_write_frame(s, pktp);
1388 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1391 return av_write_uncoded_frame_internal(s, stream_index, frame, 0);
1394 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1397 return av_write_uncoded_frame_internal(s, stream_index, frame, 1);
1400 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1402 av_assert0(s->oformat);
1403 if (!s->oformat->write_uncoded_frame)
1404 return AVERROR(ENOSYS);
1405 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1406 AV_WRITE_UNCODED_FRAME_QUERY);