2 * MPEG-2 transport stream (aka DVB) muxer
3 * Copyright (c) 2003 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
22 #include "libavutil/avassert.h"
23 #include "libavutil/bswap.h"
24 #include "libavutil/crc.h"
25 #include "libavutil/dict.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/opt.h"
30 #include "libavcodec/internal.h"
33 #include "avio_internal.h"
37 #define PCR_TIME_BASE 27000000
39 /* write DVB SI sections */
41 #define DVB_PRIVATE_NETWORK_START 0xff01
43 /*********************************************/
44 /* mpegts section writer */
46 typedef struct MpegTSSection {
50 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
54 typedef struct MpegTSService {
55 MpegTSSection pmt; /* MPEG-2 PMT table context */
56 int sid; /* service ID */
58 uint8_t provider_name[256];
63 // service_type values as defined in ETSI 300 468
65 MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
66 MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
67 MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
68 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
69 MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
70 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
71 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19,
72 MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV = 0x1F,
74 typedef struct MpegTSWrite {
75 const AVClass *av_class;
76 MpegTSSection pat; /* MPEG-2 PAT table */
77 MpegTSSection sdt; /* MPEG-2 SDT table context */
78 MpegTSService **services;
79 int64_t sdt_period; /* SDT period in PCR time base */
80 int64_t pat_period; /* PAT/PMT period in PCR time base */
86 int mux_rate; ///< set to 1 when VBR
89 int transport_stream_id;
90 int original_network_id;
100 int m2ts_textsub_pid;
103 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
104 #define MPEGTS_FLAG_AAC_LATM 0x02
105 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
106 #define MPEGTS_FLAG_SYSTEM_B 0x08
107 #define MPEGTS_FLAG_DISCONT 0x10
111 int64_t pat_period_us;
112 int64_t sdt_period_us;
116 int omit_video_pes_length;
119 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
120 #define DEFAULT_PES_HEADER_FREQ 16
121 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
123 /* The section length is 12 bits. The first 2 are set to 0, the remaining
124 * 10 bits should not exceed 1021. */
125 #define SECTION_LENGTH 1020
127 /* NOTE: 4 bytes must be left at the end for the crc32 */
128 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
131 unsigned char packet[TS_PACKET_SIZE];
132 const unsigned char *buf_ptr;
134 int first, b, len1, left;
136 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
139 buf[len - 4] = (crc >> 24) & 0xff;
140 buf[len - 3] = (crc >> 16) & 0xff;
141 buf[len - 2] = (crc >> 8) & 0xff;
142 buf[len - 1] = crc & 0xff;
144 /* send each packet */
147 first = buf == buf_ptr;
155 s->cc = s->cc + 1 & 0xf;
157 if (s->discontinuity) {
161 s->discontinuity = 0;
164 *q++ = 0; /* 0 offset */
165 len1 = TS_PACKET_SIZE - (q - packet);
168 memcpy(q, buf_ptr, len1);
170 /* add known padding data */
171 left = TS_PACKET_SIZE - (q - packet);
173 memset(q, 0xff, left);
175 s->write_packet(s, packet);
182 static inline void put16(uint8_t **q_ptr, int val)
191 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
192 int version, int sec_num, int last_sec_num,
193 uint8_t *buf, int len)
195 uint8_t section[1024], *q;
196 unsigned int tot_len;
197 /* reserved_future_use field must be set to 1 for SDT */
198 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
200 tot_len = 3 + 5 + len + 4;
201 /* check if not too big */
203 return AVERROR_INVALIDDATA;
207 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
209 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
214 mpegts_write_section(s, section, tot_len);
218 /*********************************************/
221 #define DEFAULT_PROVIDER_NAME "FFmpeg"
222 #define DEFAULT_SERVICE_NAME "Service"
224 /* we retransmit the SI info at this rate */
225 #define SDT_RETRANS_TIME 500
226 #define PAT_RETRANS_TIME 100
227 #define PCR_RETRANS_TIME 20
229 typedef struct MpegTSWriteStream {
230 int pid; /* stream associated pid */
234 int first_pts_check; ///< first pts check needed
235 int prev_payload_key;
240 AVFormatContext *amux;
242 int64_t pcr_period; /* PCR period in PCR time base */
246 int opus_queued_samples;
247 int opus_pending_trim_start;
250 static void mpegts_write_pat(AVFormatContext *s)
252 MpegTSWrite *ts = s->priv_data;
253 MpegTSService *service;
254 uint8_t data[SECTION_LENGTH], *q;
258 for (i = 0; i < ts->nb_services; i++) {
259 service = ts->services[i];
260 put16(&q, service->sid);
261 put16(&q, 0xe000 | service->pmt.pid);
263 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
267 static void putbuf(uint8_t **q_ptr, const uint8_t *buf, size_t len)
269 memcpy(*q_ptr, buf, len);
273 static void put_registration_descriptor(uint8_t **q_ptr, uint32_t tag)
276 *q++ = 0x05; /* MPEG-2 registration descriptor*/
285 static int get_dvb_stream_type(AVFormatContext *s, AVStream *st)
287 MpegTSWrite *ts = s->priv_data;
290 switch (st->codecpar->codec_id) {
291 case AV_CODEC_ID_MPEG1VIDEO:
292 case AV_CODEC_ID_MPEG2VIDEO:
293 stream_type = STREAM_TYPE_VIDEO_MPEG2;
295 case AV_CODEC_ID_MPEG4:
296 stream_type = STREAM_TYPE_VIDEO_MPEG4;
298 case AV_CODEC_ID_H264:
299 stream_type = STREAM_TYPE_VIDEO_H264;
301 case AV_CODEC_ID_HEVC:
302 stream_type = STREAM_TYPE_VIDEO_HEVC;
304 case AV_CODEC_ID_CAVS:
305 stream_type = STREAM_TYPE_VIDEO_CAVS;
307 case AV_CODEC_ID_DIRAC:
308 stream_type = STREAM_TYPE_VIDEO_DIRAC;
310 case AV_CODEC_ID_VC1:
311 stream_type = STREAM_TYPE_VIDEO_VC1;
313 case AV_CODEC_ID_MP2:
314 case AV_CODEC_ID_MP3:
315 if ( st->codecpar->sample_rate > 0
316 && st->codecpar->sample_rate < 32000) {
317 stream_type = STREAM_TYPE_AUDIO_MPEG2;
319 stream_type = STREAM_TYPE_AUDIO_MPEG1;
322 case AV_CODEC_ID_AAC:
323 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
324 ? STREAM_TYPE_AUDIO_AAC_LATM
325 : STREAM_TYPE_AUDIO_AAC;
327 case AV_CODEC_ID_AAC_LATM:
328 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
330 case AV_CODEC_ID_AC3:
331 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
332 ? STREAM_TYPE_PRIVATE_DATA
333 : STREAM_TYPE_AUDIO_AC3;
335 case AV_CODEC_ID_EAC3:
336 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
337 ? STREAM_TYPE_PRIVATE_DATA
338 : STREAM_TYPE_AUDIO_EAC3;
340 case AV_CODEC_ID_DTS:
341 stream_type = STREAM_TYPE_AUDIO_DTS;
343 case AV_CODEC_ID_TRUEHD:
344 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
346 case AV_CODEC_ID_OPUS:
347 stream_type = STREAM_TYPE_PRIVATE_DATA;
349 case AV_CODEC_ID_TIMED_ID3:
350 stream_type = STREAM_TYPE_METADATA;
353 av_log(s, AV_LOG_WARNING, "Stream %d, codec %s, is muxed as a private data stream "
354 "and may not be recognized upon reading.\n", st->index, avcodec_get_name(st->codecpar->codec_id));
355 stream_type = STREAM_TYPE_PRIVATE_DATA;
362 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
364 MpegTSWrite *ts = s->priv_data;
365 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
366 int val, stream_type, i, err = 0;
369 put16(&q, 0xe000 | service->pcr_pid);
371 program_info_length_ptr = q;
372 q += 2; /* patched after */
374 /* put program info here */
376 val = 0xf000 | (q - program_info_length_ptr - 2);
377 program_info_length_ptr[0] = val >> 8;
378 program_info_length_ptr[1] = val;
380 for (i = 0; i < s->nb_streams; i++) {
381 AVStream *st = s->streams[i];
382 MpegTSWriteStream *ts_st = st->priv_data;
383 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
385 if (s->nb_programs) {
387 AVProgram *program = service->program;
389 for (k = 0; k < program->nb_stream_indexes; k++)
390 if (program->stream_index[k] == i) {
399 if (q - data > SECTION_LENGTH - 32) {
404 stream_type = get_dvb_stream_type(s, st);
407 put16(&q, 0xe000 | ts_st->pid);
409 q += 2; /* patched after */
411 /* write optional descriptors here */
412 switch (st->codecpar->codec_type) {
413 case AVMEDIA_TYPE_AUDIO:
414 if (st->codecpar->codec_id==AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
415 *q++=0x6a; // AC3 descriptor see A038 DVB SI
416 *q++=1; // 1 byte, all flags sets to 0
417 *q++=0; // omit all fields...
419 if (st->codecpar->codec_id==AV_CODEC_ID_EAC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
420 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
421 *q++=1; // 1 byte, all flags sets to 0
422 *q++=0; // omit all fields...
424 if (st->codecpar->codec_id==AV_CODEC_ID_S302M)
425 put_registration_descriptor(&q, MKTAG('B', 'S', 'S', 'D'));
426 if (st->codecpar->codec_id==AV_CODEC_ID_OPUS) {
427 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
428 if (q - data > SECTION_LENGTH - 6 - 4) {
433 put_registration_descriptor(&q, MKTAG('O', 'p', 'u', 's'));
435 *q++ = 0x7f; /* DVB extension descriptor */
439 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
440 if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
441 /* RTP mapping family */
442 *q++ = st->codecpar->channels;
443 } else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
444 st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
445 static const uint8_t coupled_stream_counts[9] = {
446 1, 0, 1, 1, 2, 2, 2, 3, 3
448 static const uint8_t channel_map_a[8][8] = {
455 {0, 4, 1, 2, 3, 5, 6},
456 {0, 6, 1, 2, 3, 4, 5, 7},
458 static const uint8_t channel_map_b[8][8] = {
465 {0, 1, 2, 3, 4, 5, 6},
466 {0, 1, 2, 3, 4, 5, 6, 7},
468 /* Vorbis mapping family */
470 if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
471 st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
472 memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
473 *q++ = st->codecpar->channels;
474 } else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
475 st->codecpar->extradata[20] == 0 &&
476 memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
477 *q++ = st->codecpar->channels | 0x80;
479 /* Unsupported, could write an extended descriptor here */
480 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
485 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
488 } else if (st->codecpar->channels <= 2) {
489 /* Assume RTP mapping family */
490 *q++ = st->codecpar->channels;
493 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
500 char *next = lang->value;
503 *q++ = 0x0a; /* ISO 639 language descriptor */
507 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
508 if (q - data > SECTION_LENGTH - 4) {
512 next = strchr(p, ',');
513 if (strlen(p) != 3 && (!next || next != p + 3))
514 continue; /* not a 3-letter code */
520 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
522 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
524 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
527 *q++ = 0; /* undefined type */
533 q -= 2; /* no language codes were written */
536 case AVMEDIA_TYPE_SUBTITLE:
538 const char default_language[] = "und";
539 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
541 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
543 int extradata_copied = 0;
545 *q++ = 0x59; /* subtitling_descriptor */
548 while (strlen(language) >= 3) {
549 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
557 if (*language != '\0')
560 if (st->codecpar->extradata_size - extradata_copied >= 5) {
561 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
562 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
563 extradata_copied += 5;
567 * 0x10 - normal with no monitor aspect ratio criticality
568 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
569 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
570 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
571 /* support of old 4-byte extradata format */
572 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
573 extradata_copied += 4;
576 put16(&q, 1); /* composition_page_id */
577 put16(&q, 1); /* ancillary_page_id */
582 *len_ptr = q - len_ptr - 1;
583 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
584 uint8_t *len_ptr = NULL;
585 int extradata_copied = 0;
587 /* The descriptor tag. teletext_descriptor */
591 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
596 if (*language != '\0')
599 if (st->codecpar->extradata_size - 1 > extradata_copied) {
600 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
601 extradata_copied += 2;
604 /* The Teletext descriptor:
605 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
606 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
607 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
613 *len_ptr = q - len_ptr - 1;
617 case AVMEDIA_TYPE_VIDEO:
618 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
619 put_registration_descriptor(&q, MKTAG('d', 'r', 'a', 'c'));
620 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
621 put_registration_descriptor(&q, MKTAG('V', 'C', '-', '1'));
622 } else if (stream_type == STREAM_TYPE_VIDEO_HEVC && s->strict_std_compliance <= FF_COMPLIANCE_NORMAL) {
623 put_registration_descriptor(&q, MKTAG('H', 'E', 'V', 'C'));
626 case AVMEDIA_TYPE_DATA:
627 if (st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV) {
628 put_registration_descriptor(&q, MKTAG('K', 'L', 'V', 'A'));
629 } else if (st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
630 const char *tag = "ID3 ";
631 *q++ = 0x26; /* metadata descriptor */
633 put16(&q, 0xffff); /* metadata application format */
634 putbuf(&q, tag, strlen(tag));
635 *q++ = 0xff; /* metadata format */
636 putbuf(&q, tag, strlen(tag));
637 *q++ = 0; /* metadata service ID */
638 *q++ = 0xF; /* metadata_locator_record_flag|MPEG_carriage_flags|reserved */
643 val = 0xf000 | (q - desc_length_ptr - 2);
644 desc_length_ptr[0] = val >> 8;
645 desc_length_ptr[1] = val;
649 av_log(s, AV_LOG_ERROR,
650 "The PMT section cannot fit stream %d and all following streams.\n"
651 "Try reducing the number of languages in the audio streams "
652 "or the total number of streams.\n", i);
654 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
659 static void mpegts_write_sdt(AVFormatContext *s)
661 MpegTSWrite *ts = s->priv_data;
662 MpegTSService *service;
663 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
664 int i, running_status, free_ca_mode, val;
669 for (i = 0; i < ts->nb_services; i++) {
670 service = ts->services[i];
671 put16(&q, service->sid);
672 *q++ = 0xfc | 0x00; /* currently no EIT info */
673 desc_list_len_ptr = q;
675 running_status = 4; /* running */
678 /* write only one descriptor for the service name and provider */
682 *q++ = ts->service_type;
683 putbuf(&q, service->provider_name, service->provider_name[0] + 1);
684 putbuf(&q, service->name, service->name[0] + 1);
685 desc_len_ptr[0] = q - desc_len_ptr - 1;
687 /* fill descriptor length */
688 val = (running_status << 13) | (free_ca_mode << 12) |
689 (q - desc_list_len_ptr - 2);
690 desc_list_len_ptr[0] = val >> 8;
691 desc_list_len_ptr[1] = val;
693 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
697 /* This stores a string in buf with the correct encoding and also sets the
698 * first byte as the length. !str is accepted for an empty string.
699 * If the string is already encoded, invalid UTF-8 or has no multibyte sequence
700 * then we keep it as is, otherwise we signal UTF-8 encoding. */
701 static int encode_str8(uint8_t *buf, const char *str)
706 str_len = strlen(str);
707 if (str[0] && (unsigned)str[0] >= 0x20) { /* Make sure the string is not already encoded. */
708 const uint8_t *q = str;
709 int has_multibyte = 0;
712 GET_UTF8(code, *q++, goto invalid;) /* Is it valid UTF-8? */
713 has_multibyte |= (code > 127); /* Does it have multibyte UTF-8 chars in it? */
715 if (has_multibyte) { /* If we have multibyte chars and valid UTF-8, then encode as such! */
717 return AVERROR(EINVAL);
718 buf[0] = str_len + 1;
720 memcpy(&buf[2], str, str_len);
725 /* Otherwise let's just encode the string as is! */
727 return AVERROR(EINVAL);
729 memcpy(&buf[1], str, str_len);
733 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
735 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
739 static void write_packet(AVFormatContext *s, const uint8_t *packet)
741 MpegTSWrite *ts = s->priv_data;
743 int64_t pcr = get_pcr(s->priv_data, s->pb);
744 uint32_t tp_extra_header = pcr % 0x3fffffff;
745 tp_extra_header = AV_RB32(&tp_extra_header);
746 avio_write(s->pb, (unsigned char *) &tp_extra_header,
747 sizeof(tp_extra_header));
749 avio_write(s->pb, packet, TS_PACKET_SIZE);
752 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
754 AVFormatContext *ctx = s->opaque;
755 write_packet(ctx, packet);
758 static MpegTSService *mpegts_add_service(AVFormatContext *s, int sid,
759 const AVDictionary *metadata,
762 MpegTSWrite *ts = s->priv_data;
763 MpegTSService *service;
764 AVDictionaryEntry *title, *provider;
765 char default_service_name[32];
766 const char *service_name;
767 const char *provider_name;
769 title = av_dict_get(metadata, "service_name", NULL, 0);
771 title = av_dict_get(metadata, "title", NULL, 0);
772 snprintf(default_service_name, sizeof(default_service_name), "%s%02d", DEFAULT_SERVICE_NAME, ts->nb_services + 1);
773 service_name = title ? title->value : default_service_name;
774 provider = av_dict_get(metadata, "service_provider", NULL, 0);
775 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
777 service = av_mallocz(sizeof(MpegTSService));
780 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
782 service->pcr_pid = 0x1fff;
783 if (encode_str8(service->provider_name, provider_name) < 0 ||
784 encode_str8(service->name, service_name) < 0) {
785 av_log(s, AV_LOG_ERROR, "Too long service or provider name\n");
788 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
791 service->pmt.write_packet = section_write_packet;
792 service->pmt.opaque = s;
793 service->pmt.cc = 15;
794 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
795 service->program = program;
803 static void enable_pcr_generation_for_stream(AVFormatContext *s, AVStream *pcr_st)
805 MpegTSWrite *ts = s->priv_data;
806 MpegTSWriteStream *ts_st = pcr_st->priv_data;
808 if (ts->mux_rate > 1 || ts->pcr_period_ms >= 0) {
809 int pcr_period_ms = ts->pcr_period_ms == -1 ? PCR_RETRANS_TIME : ts->pcr_period_ms;
810 ts_st->pcr_period = av_rescale(pcr_period_ms, PCR_TIME_BASE, 1000);
812 /* By default, for VBR we select the highest multiple of frame duration which is less than 100 ms. */
813 int64_t frame_period = 0;
814 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
815 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
817 av_log(s, AV_LOG_WARNING, "frame size not set\n");
820 frame_period = av_rescale_rnd(frame_size, PCR_TIME_BASE, pcr_st->codecpar->sample_rate, AV_ROUND_UP);
821 } else if (pcr_st->avg_frame_rate.num) {
822 frame_period = av_rescale_rnd(pcr_st->avg_frame_rate.den, PCR_TIME_BASE, pcr_st->avg_frame_rate.num, AV_ROUND_UP);
824 if (frame_period > 0 && frame_period <= PCR_TIME_BASE / 10)
825 ts_st->pcr_period = frame_period * (PCR_TIME_BASE / 10 / frame_period);
827 ts_st->pcr_period = 1;
830 // output a PCR as soon as possible
831 ts_st->last_pcr = ts->first_pcr - ts_st->pcr_period;
834 static void select_pcr_streams(AVFormatContext *s)
836 MpegTSWrite *ts = s->priv_data;
838 for (int i = 0; i < ts->nb_services; i++) {
839 MpegTSService *service = ts->services[i];
840 AVStream *pcr_st = NULL;
841 AVProgram *program = service->program;
842 int nb_streams = program ? program->nb_stream_indexes : s->nb_streams;
844 for (int j = 0; j < nb_streams; j++) {
845 AVStream *st = s->streams[program ? program->stream_index[j] : j];
847 pcr_st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
854 MpegTSWriteStream *ts_st = pcr_st->priv_data;
855 service->pcr_pid = ts_st->pid;
856 enable_pcr_generation_for_stream(s, pcr_st);
857 av_log(s, AV_LOG_VERBOSE, "service %i using PCR in pid=%i, pcr_period=%"PRId64"ms\n",
858 service->sid, service->pcr_pid, av_rescale(ts_st->pcr_period, 1000, PCR_TIME_BASE));
863 static int mpegts_init(AVFormatContext *s)
865 MpegTSWrite *ts = s->priv_data;
870 if (ts->m2ts_mode == -1) {
871 if (av_match_ext(s->url, "m2ts")) {
878 ts->m2ts_video_pid = M2TS_VIDEO_PID;
879 ts->m2ts_audio_pid = M2TS_AUDIO_START_PID;
880 ts->m2ts_pgssub_pid = M2TS_PGSSUB_START_PID;
881 ts->m2ts_textsub_pid = M2TS_TEXTSUB_PID;
884 ts->pmt_start_pid = M2TS_PMT_PID;
885 if (s->nb_programs > 1) {
886 av_log(s, AV_LOG_ERROR, "Only one program is allowed in m2ts mode!\n");
887 return AVERROR(EINVAL);
891 if (s->max_delay < 0) /* Not set by the caller */
894 // round up to a whole number of TS packets
895 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
897 ts->tsid = ts->transport_stream_id;
898 ts->onid = ts->original_network_id;
899 if (!s->nb_programs) {
900 /* allocate a single DVB service */
901 if (!mpegts_add_service(s, ts->service_id, s->metadata, NULL))
902 return AVERROR(ENOMEM);
904 for (i = 0; i < s->nb_programs; i++) {
905 AVProgram *program = s->programs[i];
906 if (!mpegts_add_service(s, program->id, program->metadata, program))
907 return AVERROR(ENOMEM);
911 ts->pat.pid = PAT_PID;
912 /* Initialize at 15 so that it wraps and is equal to 0 for the
913 * first packet we write. */
915 ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
916 ts->pat.write_packet = section_write_packet;
919 ts->sdt.pid = SDT_PID;
921 ts->sdt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
922 ts->sdt.write_packet = section_write_packet;
925 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
927 ret = AVERROR(ENOMEM);
931 /* assign pids to each stream */
932 for (i = 0; i < s->nb_streams; i++) {
933 AVStream *st = s->streams[i];
934 MpegTSWriteStream *ts_st;
936 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
938 ret = AVERROR(ENOMEM);
941 st->priv_data = ts_st;
943 avpriv_set_pts_info(st, 33, 1, 90000);
945 ts_st->payload = av_mallocz(ts->pes_payload_size);
946 if (!ts_st->payload) {
947 ret = AVERROR(ENOMEM);
951 /* MPEG pid values < 16 are reserved. Applications which set st->id in
952 * this range are assigned a calculated pid. */
955 switch (st->codecpar->codec_type) {
956 case AVMEDIA_TYPE_VIDEO:
957 ts_st->pid = ts->m2ts_video_pid++;
959 case AVMEDIA_TYPE_AUDIO:
960 ts_st->pid = ts->m2ts_audio_pid++;
962 case AVMEDIA_TYPE_SUBTITLE:
963 switch (st->codecpar->codec_id) {
964 case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
965 ts_st->pid = ts->m2ts_pgssub_pid++;
967 case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
968 ts_st->pid = ts->m2ts_textsub_pid++;
973 if (ts->m2ts_video_pid > M2TS_VIDEO_PID + 1 ||
974 ts->m2ts_audio_pid > M2TS_AUDIO_START_PID + 32 ||
975 ts->m2ts_pgssub_pid > M2TS_PGSSUB_START_PID + 32 ||
976 ts->m2ts_textsub_pid > M2TS_TEXTSUB_PID + 1 ||
978 av_log(s, AV_LOG_ERROR, "Cannot automatically assign PID for stream %d\n", st->index);
979 ret = AVERROR(EINVAL);
983 ts_st->pid = ts->start_pid + i;
988 if (ts_st->pid >= 0x1FFF) {
989 av_log(s, AV_LOG_ERROR,
990 "Invalid stream id %d, must be less than 8191\n", st->id);
991 ret = AVERROR(EINVAL);
994 for (j = 0; j < ts->nb_services; j++) {
995 if (ts->services[j]->pmt.pid > LAST_OTHER_PID) {
996 av_log(s, AV_LOG_ERROR,
997 "Invalid PMT PID %d, must be less than %d\n", ts->services[j]->pmt.pid, LAST_OTHER_PID + 1);
998 ret = AVERROR(EINVAL);
1001 if (ts_st->pid == ts->services[j]->pmt.pid) {
1002 av_log(s, AV_LOG_ERROR, "PID %d cannot be both elementary and PMT PID\n", ts_st->pid);
1003 ret = AVERROR(EINVAL);
1007 for (j = 0; j < i; j++) {
1008 if (pids[j] == ts_st->pid) {
1009 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
1010 ret = AVERROR(EINVAL);
1014 pids[i] = ts_st->pid;
1015 ts_st->payload_pts = AV_NOPTS_VALUE;
1016 ts_st->payload_dts = AV_NOPTS_VALUE;
1017 ts_st->first_pts_check = 1;
1019 ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
1020 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1021 st->codecpar->extradata_size > 0) {
1023 ts_st->amux = avformat_alloc_context();
1025 ret = AVERROR(ENOMEM);
1028 ts_st->amux->oformat =
1029 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
1031 if (!ts_st->amux->oformat) {
1032 ret = AVERROR(EINVAL);
1035 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
1036 ret = AVERROR(ENOMEM);
1039 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
1042 ast->time_base = st->time_base;
1043 ret = avformat_write_header(ts_st->amux, NULL);
1047 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1048 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
1055 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
1057 select_pcr_streams(s);
1059 ts->last_pat_ts = AV_NOPTS_VALUE;
1060 ts->last_sdt_ts = AV_NOPTS_VALUE;
1061 ts->pat_period = av_rescale(ts->pat_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1062 ts->sdt_period = av_rescale(ts->sdt_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1064 if (ts->mux_rate == 1)
1065 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
1067 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
1068 av_log(s, AV_LOG_VERBOSE,
1069 "sdt every %"PRId64" ms, pat/pmt every %"PRId64" ms\n",
1070 av_rescale(ts->sdt_period, 1000, PCR_TIME_BASE),
1071 av_rescale(ts->pat_period, 1000, PCR_TIME_BASE));
1080 /* send SDT, PAT and PMT tables regularly */
1081 static void retransmit_si_info(AVFormatContext *s, int force_pat, int force_sdt, int64_t pcr)
1083 MpegTSWrite *ts = s->priv_data;
1086 if ((pcr != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1087 (pcr != AV_NOPTS_VALUE && pcr - ts->last_sdt_ts >= ts->sdt_period) ||
1090 if (pcr != AV_NOPTS_VALUE)
1091 ts->last_sdt_ts = FFMAX(pcr, ts->last_sdt_ts);
1092 mpegts_write_sdt(s);
1094 if ((pcr != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1095 (pcr != AV_NOPTS_VALUE && pcr - ts->last_pat_ts >= ts->pat_period) ||
1097 if (pcr != AV_NOPTS_VALUE)
1098 ts->last_pat_ts = FFMAX(pcr, ts->last_pat_ts);
1099 mpegts_write_pat(s);
1100 for (i = 0; i < ts->nb_services; i++)
1101 mpegts_write_pmt(s, ts->services[i]);
1105 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1107 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1109 *buf++ = pcr_high >> 25;
1110 *buf++ = pcr_high >> 17;
1111 *buf++ = pcr_high >> 9;
1112 *buf++ = pcr_high >> 1;
1113 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1119 /* Write a single null transport stream packet */
1120 static void mpegts_insert_null_packet(AVFormatContext *s)
1123 uint8_t buf[TS_PACKET_SIZE];
1130 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1131 write_packet(s, buf);
1134 /* Write a single transport stream packet with a PCR and no payload */
1135 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1137 MpegTSWrite *ts = s->priv_data;
1138 MpegTSWriteStream *ts_st = st->priv_data;
1140 uint8_t buf[TS_PACKET_SIZE];
1144 *q++ = ts_st->pid >> 8;
1146 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1147 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1148 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1149 *q++ = 0x10; /* Adaptation flags: PCR present */
1150 if (ts_st->discontinuity) {
1152 ts_st->discontinuity = 0;
1155 /* PCR coded into 6 bytes */
1156 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1158 /* stuffing bytes */
1159 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1160 write_packet(s, buf);
1163 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1167 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1169 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1172 val = (((pts) & 0x7fff) << 1) | 1;
1177 /* Set an adaptation field flag in an MPEG-TS packet*/
1178 static void set_af_flag(uint8_t *pkt, int flag)
1180 // expect at least one flag to set
1183 if ((pkt[3] & 0x20) == 0) {
1184 // no AF yet, set adaptation field flag
1186 // 1 byte length, no flags
1193 /* Extend the adaptation field by size bytes */
1194 static void extend_af(uint8_t *pkt, int size)
1196 // expect already existing adaptation field
1197 av_assert0(pkt[3] & 0x20);
1201 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1202 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1205 return pkt + 5 + pkt[4];
1210 /* Add a PES header to the front of the payload, and segment into an integer
1211 * number of TS packets. The final TS packet is padded using an oversized
1212 * adaptation header to exactly fill the last TS packet.
1213 * NOTE: 'payload' contains a complete PES payload. */
1214 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1215 const uint8_t *payload, int payload_size,
1216 int64_t pts, int64_t dts, int key, int stream_id)
1218 MpegTSWriteStream *ts_st = st->priv_data;
1219 MpegTSWrite *ts = s->priv_data;
1220 uint8_t buf[TS_PACKET_SIZE];
1222 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1223 int afc_len, stuffing_len;
1224 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1225 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1228 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1229 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1233 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1236 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1240 while (payload_size > 0) {
1241 int64_t pcr = AV_NOPTS_VALUE;
1242 if (ts->mux_rate > 1)
1243 pcr = get_pcr(ts, s->pb);
1244 else if (dts != AV_NOPTS_VALUE)
1245 pcr = (dts - delay) * 300;
1247 retransmit_si_info(s, force_pat, force_sdt, pcr);
1252 if (ts->mux_rate > 1) {
1253 /* Send PCR packets for all PCR streams if needed */
1254 pcr = get_pcr(ts, s->pb);
1255 if (pcr >= ts->next_pcr) {
1256 int64_t next_pcr = INT64_MAX;
1257 for (int i = 0; i < s->nb_streams; i++) {
1258 /* Make the current stream the last, because for that we
1259 * can insert the pcr into the payload later */
1260 int st2_index = i < st->index ? i : (i + 1 == s->nb_streams ? st->index : i + 1);
1261 AVStream *st2 = s->streams[st2_index];
1262 MpegTSWriteStream *ts_st2 = st2->priv_data;
1263 if (ts_st2->pcr_period) {
1264 if (pcr - ts_st2->last_pcr >= ts_st2->pcr_period) {
1265 ts_st2->last_pcr = FFMAX(pcr - ts_st2->pcr_period, ts_st2->last_pcr + ts_st2->pcr_period);
1267 mpegts_insert_pcr_only(s, st2);
1268 pcr = get_pcr(ts, s->pb);
1273 next_pcr = FFMIN(next_pcr, ts_st2->last_pcr + ts_st2->pcr_period);
1276 ts->next_pcr = next_pcr;
1278 if (dts != AV_NOPTS_VALUE && (dts - pcr / 300) > delay) {
1279 /* pcr insert gets priority over null packet insert */
1281 mpegts_insert_pcr_only(s, st);
1283 mpegts_insert_null_packet(s);
1284 /* recalculate write_pcr and possibly retransmit si_info */
1287 } else if (ts_st->pcr_period && pcr != AV_NOPTS_VALUE) {
1288 if (pcr - ts_st->last_pcr >= ts_st->pcr_period && is_start) {
1289 ts_st->last_pcr = FFMAX(pcr - ts_st->pcr_period, ts_st->last_pcr + ts_st->pcr_period);
1294 /* prepare packet header */
1297 val = ts_st->pid >> 8;
1298 if (ts->m2ts_mode && st->codecpar->codec_id == AV_CODEC_ID_AC3)
1304 ts_st->cc = ts_st->cc + 1 & 0xf;
1305 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1306 if (ts_st->discontinuity) {
1307 set_af_flag(buf, 0x80);
1308 q = get_ts_payload_start(buf);
1309 ts_st->discontinuity = 0;
1311 if (key && is_start && pts != AV_NOPTS_VALUE) {
1312 // set Random Access for key frames
1313 if (ts_st->pcr_period)
1315 set_af_flag(buf, 0x40);
1316 q = get_ts_payload_start(buf);
1319 set_af_flag(buf, 0x10);
1320 q = get_ts_payload_start(buf);
1321 // add 11, pcr references the last byte of program clock reference base
1322 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1323 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1324 extend_af(buf, write_pcr_bits(q, pcr));
1325 q = get_ts_payload_start(buf);
1328 int pes_extension = 0;
1329 int pes_header_stuffing_bytes = 0;
1330 /* write PES header */
1334 is_dvb_subtitle = 0;
1335 is_dvb_teletext = 0;
1336 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1337 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1341 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1342 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1343 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1344 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1346 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1347 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1350 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
1351 st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
1353 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1354 *q++ = stream_id != -1 ? stream_id : 0xfc;
1356 if (stream_id == 0xbd) /* asynchronous KLV */
1357 pts = dts = AV_NOPTS_VALUE;
1360 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1361 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1362 is_dvb_subtitle = 1;
1363 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1364 is_dvb_teletext = 1;
1370 if (pts != AV_NOPTS_VALUE) {
1374 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1378 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1379 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1380 /* set PES_extension_flag */
1384 /* One byte for PES2 extension flag +
1385 * one byte for extension length +
1386 * one byte for extension id */
1389 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1390 * otherwise it will not play sound on blu-ray
1392 if (ts->m2ts_mode &&
1393 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1394 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1395 /* set PES_extension_flag */
1400 if (is_dvb_teletext) {
1401 pes_header_stuffing_bytes = 0x24 - header_len;
1404 len = payload_size + header_len + 3;
1405 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1406 if (is_dvb_subtitle) {
1412 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1418 /* data alignment indicator is required for subtitle and data streams */
1419 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1424 if (pts != AV_NOPTS_VALUE) {
1425 write_pts(q, flags >> 6, pts);
1428 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1429 write_pts(q, 1, dts);
1432 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1433 flags = 0x01; /* set PES_extension_flag_2 */
1435 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1436 /* Set the stream ID extension flag bit to 0 and
1437 * write the extended stream ID. */
1440 /* For Blu-ray AC3 Audio Setting extended flags */
1441 if (ts->m2ts_mode &&
1443 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1444 flags = 0x01; /* set PES_extension_flag_2 */
1446 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1447 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1451 if (is_dvb_subtitle) {
1452 /* First two fields of DVB subtitles PES data:
1453 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1454 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1458 if (is_dvb_teletext) {
1459 memset(q, 0xff, pes_header_stuffing_bytes);
1460 q += pes_header_stuffing_bytes;
1465 header_len = q - buf;
1467 len = TS_PACKET_SIZE - header_len;
1468 if (len > payload_size)
1470 stuffing_len = TS_PACKET_SIZE - header_len - len;
1471 if (stuffing_len > 0) {
1472 /* add stuffing with AFC */
1473 if (buf[3] & 0x20) {
1474 /* stuffing already present: increase its size */
1475 afc_len = buf[4] + 1;
1476 memmove(buf + 4 + afc_len + stuffing_len,
1478 header_len - (4 + afc_len));
1479 buf[4] += stuffing_len;
1480 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1483 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1485 buf[4] = stuffing_len - 1;
1486 if (stuffing_len >= 2) {
1488 memset(buf + 6, 0xff, stuffing_len - 2);
1493 if (is_dvb_subtitle && payload_size == len) {
1494 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1495 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1497 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1501 payload_size -= len;
1502 write_packet(s, buf);
1504 ts_st->prev_payload_key = key;
1507 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1509 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1510 if (!st->nb_frames) {
1511 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1512 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1513 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1514 return AVERROR_INVALIDDATA;
1516 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1518 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1519 av_log(s, AV_LOG_WARNING, "\n");
1524 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1526 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1527 if (!st->nb_frames) {
1528 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1529 return AVERROR_PATCHWELCOME;
1531 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1533 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1534 av_log(s, AV_LOG_WARNING, "\n");
1539 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1540 * Released under the LGPL v2.1+, written by
1541 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1543 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1545 static const int durations[32] = {
1546 480, 960, 1920, 2880, /* Silk NB */
1547 480, 960, 1920, 2880, /* Silk MB */
1548 480, 960, 1920, 2880, /* Silk WB */
1549 480, 960, /* Hybrid SWB */
1550 480, 960, /* Hybrid FB */
1551 120, 240, 480, 960, /* CELT NB */
1552 120, 240, 480, 960, /* CELT NB */
1553 120, 240, 480, 960, /* CELT NB */
1554 120, 240, 480, 960, /* CELT NB */
1556 int toc, frame_duration, nframes, duration;
1563 frame_duration = durations[toc >> 3];
1577 nframes = pkt->data[1] & 63;
1581 duration = nframes * frame_duration;
1582 if (duration > 5760) {
1583 av_log(s, AV_LOG_WARNING,
1584 "Opus packet duration > 120 ms, invalid");
1591 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1593 AVStream *st = s->streams[pkt->stream_index];
1594 int size = pkt->size;
1595 uint8_t *buf = pkt->data;
1596 uint8_t *data = NULL;
1597 MpegTSWrite *ts = s->priv_data;
1598 MpegTSWriteStream *ts_st = st->priv_data;
1599 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1600 const int64_t max_audio_delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) / 2;
1601 int64_t dts = pkt->dts, pts = pkt->pts;
1602 int opus_samples = 0;
1604 uint8_t *side_data = NULL;
1607 side_data = av_packet_get_side_data(pkt,
1608 AV_PKT_DATA_MPEGTS_STREAM_ID,
1611 stream_id = side_data[0];
1613 if (ts->copyts < 1) {
1614 if (pts != AV_NOPTS_VALUE)
1616 if (dts != AV_NOPTS_VALUE)
1620 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1621 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1622 return AVERROR_INVALIDDATA;
1624 ts_st->first_pts_check = 0;
1626 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1627 const uint8_t *p = buf, *buf_end = p + size;
1628 uint32_t state = -1;
1629 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1630 int ret = ff_check_h264_startcode(s, st, pkt);
1634 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1638 p = avpriv_find_start_code(p, buf_end, &state);
1639 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", state & 0x1f);
1640 if ((state & 0x1f) == 7)
1642 } while (p < buf_end && (state & 0x1f) != 9 &&
1643 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1645 if ((state & 0x1f) != 5)
1647 if ((state & 0x1f) != 9) { // AUD NAL
1648 data = av_malloc(pkt->size + 6 + extradd);
1650 return AVERROR(ENOMEM);
1651 memcpy(data + 6, st->codecpar->extradata, extradd);
1652 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1653 AV_WB32(data, 0x00000001);
1655 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1657 size = pkt->size + 6 + extradd;
1659 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1660 if (pkt->size < 2) {
1661 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1662 return AVERROR_INVALIDDATA;
1664 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1669 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1670 "and extradata missing\n");
1672 av_init_packet(&pkt2);
1673 pkt2.data = pkt->data;
1674 pkt2.size = pkt->size;
1675 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1676 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1678 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1682 ret = av_write_frame(ts_st->amux, &pkt2);
1684 ffio_free_dyn_buf(&ts_st->amux->pb);
1687 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1688 ts_st->amux->pb = NULL;
1692 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1693 const uint8_t *p = buf, *buf_end = p + size;
1694 uint32_t state = -1;
1695 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1696 int ret = check_hevc_startcode(s, st, pkt);
1700 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1704 p = avpriv_find_start_code(p, buf_end, &state);
1705 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", (state & 0x7e)>>1);
1706 if ((state & 0x7e) == 2*32)
1708 } while (p < buf_end && (state & 0x7e) != 2*35 &&
1709 (state & 0x7e) >= 2*32);
1711 if ((state & 0x7e) < 2*16 || (state & 0x7e) >= 2*24)
1713 if ((state & 0x7e) != 2*35) { // AUD NAL
1714 data = av_malloc(pkt->size + 7 + extradd);
1716 return AVERROR(ENOMEM);
1717 memcpy(data + 7, st->codecpar->extradata, extradd);
1718 memcpy(data + 7 + extradd, pkt->data, pkt->size);
1719 AV_WB32(data, 0x00000001);
1722 data[6] = 0x50; // any slice type (0x4) + rbsp stop one bit
1724 size = pkt->size + 7 + extradd;
1726 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1727 if (pkt->size < 2) {
1728 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1729 return AVERROR_INVALIDDATA;
1732 /* Add Opus control header */
1733 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1737 int ctrl_header_size;
1738 int trim_start = 0, trim_end = 0;
1740 opus_samples = opus_get_packet_samples(s, pkt);
1742 side_data = av_packet_get_side_data(pkt,
1743 AV_PKT_DATA_SKIP_SAMPLES,
1746 if (side_data && side_data_size >= 10) {
1747 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1750 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1751 if (ts_st->opus_pending_trim_start)
1752 ctrl_header_size += 2;
1754 ctrl_header_size += 2;
1756 data = av_malloc(ctrl_header_size);
1758 return AVERROR(ENOMEM);
1762 if (ts_st->opus_pending_trim_start)
1770 data[i] = FFMIN(n, 255);
1775 av_assert0(2 + pkt->size / 255 + 1 == i);
1777 if (ts_st->opus_pending_trim_start) {
1778 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1779 AV_WB16(data + i, trim_start);
1781 ts_st->opus_pending_trim_start -= trim_start;
1784 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1785 AV_WB16(data + i, trim_end);
1789 memcpy(data + i, pkt->data, pkt->size);
1791 size = ctrl_header_size;
1793 /* TODO: Can we get TS formatted data here? If so we will
1794 * need to count the samples of that too! */
1795 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1799 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1800 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1801 dts - ts_st->payload_dts >= max_audio_delay) ||
1802 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1803 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1804 ts_st->payload_pts, ts_st->payload_dts,
1805 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1806 ts_st->payload_size = 0;
1807 ts_st->opus_queued_samples = 0;
1810 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1811 av_assert0(!ts_st->payload_size);
1812 // for video and subtitle, write a single pes packet
1813 mpegts_write_pes(s, st, buf, size, pts, dts,
1814 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1815 ts_st->opus_queued_samples = 0;
1820 if (!ts_st->payload_size) {
1821 ts_st->payload_pts = pts;
1822 ts_st->payload_dts = dts;
1823 ts_st->payload_flags = pkt->flags;
1826 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1827 ts_st->payload_size += size;
1828 ts_st->opus_queued_samples += opus_samples;
1835 static void mpegts_write_flush(AVFormatContext *s)
1837 MpegTSWrite *ts = s->priv_data;
1840 /* flush current packets */
1841 for (i = 0; i < s->nb_streams; i++) {
1842 AVStream *st = s->streams[i];
1843 MpegTSWriteStream *ts_st = st->priv_data;
1844 if (ts_st->payload_size > 0) {
1845 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1846 ts_st->payload_pts, ts_st->payload_dts,
1847 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1848 ts_st->payload_size = 0;
1849 ts_st->opus_queued_samples = 0;
1853 if (ts->m2ts_mode) {
1854 int packets = (avio_tell(s->pb) / (TS_PACKET_SIZE + 4)) % 32;
1855 while (packets++ < 32)
1856 mpegts_insert_null_packet(s);
1860 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1863 mpegts_write_flush(s);
1866 return mpegts_write_packet_internal(s, pkt);
1870 static int mpegts_write_end(AVFormatContext *s)
1873 mpegts_write_flush(s);
1878 static void mpegts_deinit(AVFormatContext *s)
1880 MpegTSWrite *ts = s->priv_data;
1881 MpegTSService *service;
1884 for (i = 0; i < s->nb_streams; i++) {
1885 AVStream *st = s->streams[i];
1886 MpegTSWriteStream *ts_st = st->priv_data;
1888 av_freep(&ts_st->payload);
1890 avformat_free_context(ts_st->amux);
1896 for (i = 0; i < ts->nb_services; i++) {
1897 service = ts->services[i];
1900 av_freep(&ts->services);
1903 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1906 AVStream *st = s->streams[pkt->stream_index];
1908 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1909 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1910 (AV_RB24(pkt->data) != 0x000001 ||
1911 (st->codecpar->extradata_size > 0 &&
1912 st->codecpar->extradata[0] == 1)))
1913 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1914 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1915 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1916 (AV_RB24(pkt->data) != 0x000001 ||
1917 (st->codecpar->extradata_size > 0 &&
1918 st->codecpar->extradata[0] == 1)))
1919 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1925 static const AVOption options[] = {
1926 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1927 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1928 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1929 { "mpegts_original_network_id", "Set original_network_id field.",
1930 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1931 { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1932 { "mpegts_service_id", "Set service_id field.",
1933 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1934 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1935 { "mpegts_service_type", "Set service_type field.",
1936 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1937 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1938 { "digital_tv", "Digital Television.",
1939 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1940 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1941 { "digital_radio", "Digital Radio.",
1942 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1943 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1944 { "teletext", "Teletext.",
1945 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1946 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1947 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1948 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1949 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1950 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1951 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1952 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1953 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1954 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1955 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1956 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1957 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1958 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1959 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
1960 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff,
1961 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1962 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1963 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1964 { .i64 = 0x1000 }, FIRST_OTHER_PID, LAST_OTHER_PID, AV_OPT_FLAG_ENCODING_PARAM },
1965 { "mpegts_start_pid", "Set the first pid.",
1966 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1967 { .i64 = 0x0100 }, FIRST_OTHER_PID, LAST_OTHER_PID, AV_OPT_FLAG_ENCODING_PARAM },
1968 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1969 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
1970 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1972 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1973 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1974 { "pes_payload_size", "Minimum PES packet payload in bytes",
1975 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1976 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1977 { "mpegts_flags", "MPEG-TS muxing flags",
1978 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1979 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1980 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1981 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1982 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1983 { "latm", "Use LATM packetization for AAC",
1984 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1985 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1986 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1987 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1988 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1989 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
1990 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
1991 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1992 { "initial_discontinuity", "Mark initial packets as discontinuous",
1993 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX,
1994 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1995 { "mpegts_copyts", "don't offset dts/pts",
1996 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
1997 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1998 { "tables_version", "set PAT, PMT and SDT version",
1999 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
2000 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
2001 { "omit_video_pes_length", "Omit the PES packet length for video packets",
2002 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
2003 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
2004 { "pcr_period", "PCR retransmission time in milliseconds",
2005 offsetof(MpegTSWrite, pcr_period_ms), AV_OPT_TYPE_INT,
2006 { .i64 = -1 }, -1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
2007 { "pat_period", "PAT/PMT retransmission time limit in seconds",
2008 offsetof(MpegTSWrite, pat_period_us), AV_OPT_TYPE_DURATION,
2009 { .i64 = PAT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM },
2010 { "sdt_period", "SDT retransmission time limit in seconds",
2011 offsetof(MpegTSWrite, sdt_period_us), AV_OPT_TYPE_DURATION,
2012 { .i64 = SDT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM },
2016 static const AVClass mpegts_muxer_class = {
2017 .class_name = "MPEGTS muxer",
2018 .item_name = av_default_item_name,
2020 .version = LIBAVUTIL_VERSION_INT,
2023 AVOutputFormat ff_mpegts_muxer = {
2025 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2026 .mime_type = "video/MP2T",
2027 .extensions = "ts,m2t,m2ts,mts",
2028 .priv_data_size = sizeof(MpegTSWrite),
2029 .audio_codec = AV_CODEC_ID_MP2,
2030 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
2031 .init = mpegts_init,
2032 .write_packet = mpegts_write_packet,
2033 .write_trailer = mpegts_write_end,
2034 .deinit = mpegts_deinit,
2035 .check_bitstream = mpegts_check_bitstream,
2036 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS | AVFMT_NODIMENSIONS,
2037 .priv_class = &mpegts_muxer_class,