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;
243 int64_t pcr_period; /* PCR period in PCR time base */
247 int opus_queued_samples;
248 int opus_pending_trim_start;
251 static void mpegts_write_pat(AVFormatContext *s)
253 MpegTSWrite *ts = s->priv_data;
254 MpegTSService *service;
255 uint8_t data[SECTION_LENGTH], *q;
259 for (i = 0; i < ts->nb_services; i++) {
260 service = ts->services[i];
261 put16(&q, service->sid);
262 put16(&q, 0xe000 | service->pmt.pid);
264 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
268 static void putbuf(uint8_t **q_ptr, const uint8_t *buf, size_t len)
270 memcpy(*q_ptr, buf, len);
274 static void put_registration_descriptor(uint8_t **q_ptr, uint32_t tag)
277 *q++ = 0x05; /* MPEG-2 registration descriptor*/
286 static int get_dvb_stream_type(AVFormatContext *s, AVStream *st)
288 MpegTSWrite *ts = s->priv_data;
289 MpegTSWriteStream *ts_st = st->priv_data;
292 switch (st->codecpar->codec_id) {
293 case AV_CODEC_ID_MPEG1VIDEO:
294 case AV_CODEC_ID_MPEG2VIDEO:
295 stream_type = STREAM_TYPE_VIDEO_MPEG2;
297 case AV_CODEC_ID_MPEG4:
298 stream_type = STREAM_TYPE_VIDEO_MPEG4;
300 case AV_CODEC_ID_H264:
301 stream_type = STREAM_TYPE_VIDEO_H264;
303 case AV_CODEC_ID_HEVC:
304 stream_type = STREAM_TYPE_VIDEO_HEVC;
306 case AV_CODEC_ID_CAVS:
307 stream_type = STREAM_TYPE_VIDEO_CAVS;
309 case AV_CODEC_ID_DIRAC:
310 stream_type = STREAM_TYPE_VIDEO_DIRAC;
312 case AV_CODEC_ID_VC1:
313 stream_type = STREAM_TYPE_VIDEO_VC1;
315 case AV_CODEC_ID_MP2:
316 case AV_CODEC_ID_MP3:
317 if ( st->codecpar->sample_rate > 0
318 && st->codecpar->sample_rate < 32000) {
319 stream_type = STREAM_TYPE_AUDIO_MPEG2;
321 stream_type = STREAM_TYPE_AUDIO_MPEG1;
324 case AV_CODEC_ID_AAC:
325 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
326 ? STREAM_TYPE_AUDIO_AAC_LATM
327 : STREAM_TYPE_AUDIO_AAC;
329 case AV_CODEC_ID_AAC_LATM:
330 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
332 case AV_CODEC_ID_AC3:
333 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
334 ? STREAM_TYPE_PRIVATE_DATA
335 : STREAM_TYPE_AUDIO_AC3;
337 case AV_CODEC_ID_EAC3:
338 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
339 ? STREAM_TYPE_PRIVATE_DATA
340 : STREAM_TYPE_AUDIO_EAC3;
342 case AV_CODEC_ID_DTS:
343 stream_type = STREAM_TYPE_AUDIO_DTS;
345 case AV_CODEC_ID_TRUEHD:
346 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
348 case AV_CODEC_ID_OPUS:
349 stream_type = STREAM_TYPE_PRIVATE_DATA;
351 case AV_CODEC_ID_TIMED_ID3:
352 stream_type = STREAM_TYPE_METADATA;
354 case AV_CODEC_ID_DVB_SUBTITLE:
355 case AV_CODEC_ID_DVB_TELETEXT:
356 stream_type = STREAM_TYPE_PRIVATE_DATA;
359 av_log_once(s, AV_LOG_WARNING, AV_LOG_DEBUG, &ts_st->data_st_warning,
360 "Stream %d, codec %s, is muxed as a private data stream "
361 "and may not be recognized upon reading.\n", st->index,
362 avcodec_get_name(st->codecpar->codec_id));
363 stream_type = STREAM_TYPE_PRIVATE_DATA;
370 static int get_m2ts_stream_type(AVFormatContext *s, AVStream *st)
373 MpegTSWriteStream *ts_st = st->priv_data;
375 switch (st->codecpar->codec_id) {
376 case AV_CODEC_ID_MPEG2VIDEO:
377 stream_type = STREAM_TYPE_VIDEO_MPEG2;
379 case AV_CODEC_ID_H264:
380 stream_type = STREAM_TYPE_VIDEO_H264;
382 case AV_CODEC_ID_VC1:
383 stream_type = STREAM_TYPE_VIDEO_VC1;
385 case AV_CODEC_ID_HEVC:
386 stream_type = STREAM_TYPE_VIDEO_HEVC;
388 case AV_CODEC_ID_PCM_BLURAY:
391 case AV_CODEC_ID_AC3:
394 case AV_CODEC_ID_DTS:
395 stream_type = (st->codecpar->channels > 6) ? 0x85 : 0x82;
397 case AV_CODEC_ID_TRUEHD:
400 case AV_CODEC_ID_EAC3:
403 case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
406 case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
410 av_log_once(s, AV_LOG_WARNING, AV_LOG_DEBUG, &ts_st->data_st_warning,
411 "Stream %d, codec %s, is muxed as a private data stream "
412 "and may not be recognized upon reading.\n", st->index,
413 avcodec_get_name(st->codecpar->codec_id));
414 stream_type = STREAM_TYPE_PRIVATE_DATA;
421 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
423 MpegTSWrite *ts = s->priv_data;
424 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
425 int val, stream_type, i, err = 0;
428 put16(&q, 0xe000 | service->pcr_pid);
430 program_info_length_ptr = q;
431 q += 2; /* patched after */
433 /* put program info here */
435 put_registration_descriptor(&q, MKTAG('H', 'D', 'M', 'V'));
436 *q++ = 0x88; // descriptor_tag - hdmv_copy_control_descriptor
437 *q++ = 0x04; // descriptor_length
438 put16(&q, 0x0fff); // CA_System_ID
439 *q++ = 0xfc; // private_data_byte
440 *q++ = 0xfc; // private_data_byte
443 val = 0xf000 | (q - program_info_length_ptr - 2);
444 program_info_length_ptr[0] = val >> 8;
445 program_info_length_ptr[1] = val;
447 for (i = 0; i < s->nb_streams; i++) {
448 AVStream *st = s->streams[i];
449 MpegTSWriteStream *ts_st = st->priv_data;
450 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
452 if (s->nb_programs) {
454 AVProgram *program = service->program;
456 for (k = 0; k < program->nb_stream_indexes; k++)
457 if (program->stream_index[k] == i) {
466 if (q - data > SECTION_LENGTH - 32) {
471 stream_type = ts->m2ts_mode ? get_m2ts_stream_type(s, st) : get_dvb_stream_type(s, st);
474 put16(&q, 0xe000 | ts_st->pid);
476 q += 2; /* patched after */
478 /* write optional descriptors here */
479 switch (st->codecpar->codec_type) {
480 case AVMEDIA_TYPE_AUDIO:
481 if (st->codecpar->codec_id==AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
482 *q++=0x6a; // AC3 descriptor see A038 DVB SI
483 *q++=1; // 1 byte, all flags sets to 0
484 *q++=0; // omit all fields...
486 if (st->codecpar->codec_id==AV_CODEC_ID_EAC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
487 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
488 *q++=1; // 1 byte, all flags sets to 0
489 *q++=0; // omit all fields...
491 if (st->codecpar->codec_id==AV_CODEC_ID_S302M)
492 put_registration_descriptor(&q, MKTAG('B', 'S', 'S', 'D'));
493 if (st->codecpar->codec_id==AV_CODEC_ID_OPUS) {
494 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
495 if (q - data > SECTION_LENGTH - 6 - 4) {
500 put_registration_descriptor(&q, MKTAG('O', 'p', 'u', 's'));
502 *q++ = 0x7f; /* DVB extension descriptor */
506 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
507 if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
508 /* RTP mapping family */
509 *q++ = st->codecpar->channels;
510 } else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
511 st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
512 static const uint8_t coupled_stream_counts[9] = {
513 1, 0, 1, 1, 2, 2, 2, 3, 3
515 static const uint8_t channel_map_a[8][8] = {
522 {0, 4, 1, 2, 3, 5, 6},
523 {0, 6, 1, 2, 3, 4, 5, 7},
525 static const uint8_t channel_map_b[8][8] = {
532 {0, 1, 2, 3, 4, 5, 6},
533 {0, 1, 2, 3, 4, 5, 6, 7},
535 /* Vorbis mapping family */
537 if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
538 st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
539 memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
540 *q++ = st->codecpar->channels;
541 } else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
542 st->codecpar->extradata[20] == 0 &&
543 memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
544 *q++ = st->codecpar->channels | 0x80;
546 /* Unsupported, could write an extended descriptor here */
547 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
552 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
555 } else if (st->codecpar->channels <= 2) {
556 /* Assume RTP mapping family */
557 *q++ = st->codecpar->channels;
560 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
567 char *next = lang->value;
570 *q++ = 0x0a; /* ISO 639 language descriptor */
574 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
575 if (q - data > SECTION_LENGTH - 4) {
579 next = strchr(p, ',');
580 if (strlen(p) != 3 && (!next || next != p + 3))
581 continue; /* not a 3-letter code */
587 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
589 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
591 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
594 *q++ = 0; /* undefined type */
600 q -= 2; /* no language codes were written */
603 case AVMEDIA_TYPE_SUBTITLE:
605 const char default_language[] = "und";
606 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
608 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
610 int extradata_copied = 0;
612 *q++ = 0x59; /* subtitling_descriptor */
615 while (strlen(language) >= 3) {
616 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
624 if (*language != '\0')
627 if (st->codecpar->extradata_size - extradata_copied >= 5) {
628 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
629 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
630 extradata_copied += 5;
634 * 0x10 - normal with no monitor aspect ratio criticality
635 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
636 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
637 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
638 /* support of old 4-byte extradata format */
639 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
640 extradata_copied += 4;
643 put16(&q, 1); /* composition_page_id */
644 put16(&q, 1); /* ancillary_page_id */
649 *len_ptr = q - len_ptr - 1;
650 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
651 uint8_t *len_ptr = NULL;
652 int extradata_copied = 0;
654 /* The descriptor tag. teletext_descriptor */
658 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
663 if (*language != '\0')
666 if (st->codecpar->extradata_size - 1 > extradata_copied) {
667 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
668 extradata_copied += 2;
671 /* The Teletext descriptor:
672 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
673 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
674 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
680 *len_ptr = q - len_ptr - 1;
684 case AVMEDIA_TYPE_VIDEO:
685 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
686 put_registration_descriptor(&q, MKTAG('d', 'r', 'a', 'c'));
687 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
688 put_registration_descriptor(&q, MKTAG('V', 'C', '-', '1'));
689 } else if (stream_type == STREAM_TYPE_VIDEO_HEVC && s->strict_std_compliance <= FF_COMPLIANCE_NORMAL) {
690 put_registration_descriptor(&q, MKTAG('H', 'E', 'V', 'C'));
693 case AVMEDIA_TYPE_DATA:
694 if (st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV) {
695 put_registration_descriptor(&q, MKTAG('K', 'L', 'V', 'A'));
696 } else if (st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
697 const char *tag = "ID3 ";
698 *q++ = 0x26; /* metadata descriptor */
700 put16(&q, 0xffff); /* metadata application format */
701 putbuf(&q, tag, strlen(tag));
702 *q++ = 0xff; /* metadata format */
703 putbuf(&q, tag, strlen(tag));
704 *q++ = 0; /* metadata service ID */
705 *q++ = 0xF; /* metadata_locator_record_flag|MPEG_carriage_flags|reserved */
710 val = 0xf000 | (q - desc_length_ptr - 2);
711 desc_length_ptr[0] = val >> 8;
712 desc_length_ptr[1] = val;
716 av_log(s, AV_LOG_ERROR,
717 "The PMT section cannot fit stream %d and all following streams.\n"
718 "Try reducing the number of languages in the audio streams "
719 "or the total number of streams.\n", i);
721 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
726 static void mpegts_write_sdt(AVFormatContext *s)
728 MpegTSWrite *ts = s->priv_data;
729 MpegTSService *service;
730 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
731 int i, running_status, free_ca_mode, val;
736 for (i = 0; i < ts->nb_services; i++) {
737 service = ts->services[i];
738 put16(&q, service->sid);
739 *q++ = 0xfc | 0x00; /* currently no EIT info */
740 desc_list_len_ptr = q;
742 running_status = 4; /* running */
745 /* write only one descriptor for the service name and provider */
749 *q++ = ts->service_type;
750 putbuf(&q, service->provider_name, service->provider_name[0] + 1);
751 putbuf(&q, service->name, service->name[0] + 1);
752 desc_len_ptr[0] = q - desc_len_ptr - 1;
754 /* fill descriptor length */
755 val = (running_status << 13) | (free_ca_mode << 12) |
756 (q - desc_list_len_ptr - 2);
757 desc_list_len_ptr[0] = val >> 8;
758 desc_list_len_ptr[1] = val;
760 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
764 /* This stores a string in buf with the correct encoding and also sets the
765 * first byte as the length. !str is accepted for an empty string.
766 * If the string is already encoded, invalid UTF-8 or has no multibyte sequence
767 * then we keep it as is, otherwise we signal UTF-8 encoding. */
768 static int encode_str8(uint8_t *buf, const char *str)
773 str_len = strlen(str);
774 if (str[0] && (unsigned)str[0] >= 0x20) { /* Make sure the string is not already encoded. */
775 const uint8_t *q = str;
776 int has_multibyte = 0;
779 GET_UTF8(code, *q++, goto invalid;) /* Is it valid UTF-8? */
780 has_multibyte |= (code > 127); /* Does it have multibyte UTF-8 chars in it? */
782 if (has_multibyte) { /* If we have multibyte chars and valid UTF-8, then encode as such! */
784 return AVERROR(EINVAL);
785 buf[0] = str_len + 1;
787 memcpy(&buf[2], str, str_len);
792 /* Otherwise let's just encode the string as is! */
794 return AVERROR(EINVAL);
796 memcpy(&buf[1], str, str_len);
800 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
802 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
806 static void write_packet(AVFormatContext *s, const uint8_t *packet)
808 MpegTSWrite *ts = s->priv_data;
810 int64_t pcr = get_pcr(s->priv_data, s->pb);
811 uint32_t tp_extra_header = pcr % 0x3fffffff;
812 tp_extra_header = AV_RB32(&tp_extra_header);
813 avio_write(s->pb, (unsigned char *) &tp_extra_header,
814 sizeof(tp_extra_header));
816 avio_write(s->pb, packet, TS_PACKET_SIZE);
819 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
821 AVFormatContext *ctx = s->opaque;
822 write_packet(ctx, packet);
825 static MpegTSService *mpegts_add_service(AVFormatContext *s, int sid,
826 const AVDictionary *metadata,
829 MpegTSWrite *ts = s->priv_data;
830 MpegTSService *service;
831 AVDictionaryEntry *title, *provider;
832 char default_service_name[32];
833 const char *service_name;
834 const char *provider_name;
836 title = av_dict_get(metadata, "service_name", NULL, 0);
838 title = av_dict_get(metadata, "title", NULL, 0);
839 snprintf(default_service_name, sizeof(default_service_name), "%s%02d", DEFAULT_SERVICE_NAME, ts->nb_services + 1);
840 service_name = title ? title->value : default_service_name;
841 provider = av_dict_get(metadata, "service_provider", NULL, 0);
842 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
844 service = av_mallocz(sizeof(MpegTSService));
847 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
849 service->pcr_pid = 0x1fff;
850 if (encode_str8(service->provider_name, provider_name) < 0 ||
851 encode_str8(service->name, service_name) < 0) {
852 av_log(s, AV_LOG_ERROR, "Too long service or provider name\n");
855 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
858 service->pmt.write_packet = section_write_packet;
859 service->pmt.opaque = s;
860 service->pmt.cc = 15;
861 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
862 service->program = program;
870 static void enable_pcr_generation_for_stream(AVFormatContext *s, AVStream *pcr_st)
872 MpegTSWrite *ts = s->priv_data;
873 MpegTSWriteStream *ts_st = pcr_st->priv_data;
875 if (ts->mux_rate > 1 || ts->pcr_period_ms >= 0) {
876 int pcr_period_ms = ts->pcr_period_ms == -1 ? PCR_RETRANS_TIME : ts->pcr_period_ms;
877 ts_st->pcr_period = av_rescale(pcr_period_ms, PCR_TIME_BASE, 1000);
879 /* By default, for VBR we select the highest multiple of frame duration which is less than 100 ms. */
880 int64_t frame_period = 0;
881 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
882 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
884 av_log(s, AV_LOG_WARNING, "frame size not set\n");
887 frame_period = av_rescale_rnd(frame_size, PCR_TIME_BASE, pcr_st->codecpar->sample_rate, AV_ROUND_UP);
888 } else if (pcr_st->avg_frame_rate.num) {
889 frame_period = av_rescale_rnd(pcr_st->avg_frame_rate.den, PCR_TIME_BASE, pcr_st->avg_frame_rate.num, AV_ROUND_UP);
891 if (frame_period > 0 && frame_period <= PCR_TIME_BASE / 10)
892 ts_st->pcr_period = frame_period * (PCR_TIME_BASE / 10 / frame_period);
894 ts_st->pcr_period = 1;
897 // output a PCR as soon as possible
898 ts_st->last_pcr = ts->first_pcr - ts_st->pcr_period;
901 static void select_pcr_streams(AVFormatContext *s)
903 MpegTSWrite *ts = s->priv_data;
905 for (int i = 0; i < ts->nb_services; i++) {
906 MpegTSService *service = ts->services[i];
907 AVStream *pcr_st = NULL;
908 AVProgram *program = service->program;
909 int nb_streams = program ? program->nb_stream_indexes : s->nb_streams;
911 for (int j = 0; j < nb_streams; j++) {
912 AVStream *st = s->streams[program ? program->stream_index[j] : j];
914 pcr_st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
921 MpegTSWriteStream *ts_st = pcr_st->priv_data;
922 service->pcr_pid = ts_st->pid;
923 enable_pcr_generation_for_stream(s, pcr_st);
924 av_log(s, AV_LOG_VERBOSE, "service %i using PCR in pid=%i, pcr_period=%"PRId64"ms\n",
925 service->sid, service->pcr_pid, av_rescale(ts_st->pcr_period, 1000, PCR_TIME_BASE));
930 static int mpegts_init(AVFormatContext *s)
932 MpegTSWrite *ts = s->priv_data;
937 if (ts->m2ts_mode == -1) {
938 if (av_match_ext(s->url, "m2ts")) {
945 ts->m2ts_video_pid = M2TS_VIDEO_PID;
946 ts->m2ts_audio_pid = M2TS_AUDIO_START_PID;
947 ts->m2ts_pgssub_pid = M2TS_PGSSUB_START_PID;
948 ts->m2ts_textsub_pid = M2TS_TEXTSUB_PID;
951 ts->pmt_start_pid = M2TS_PMT_PID;
952 if (s->nb_programs > 1) {
953 av_log(s, AV_LOG_ERROR, "Only one program is allowed in m2ts mode!\n");
954 return AVERROR(EINVAL);
958 if (s->max_delay < 0) /* Not set by the caller */
961 // round up to a whole number of TS packets
962 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
964 ts->tsid = ts->transport_stream_id;
965 ts->onid = ts->original_network_id;
966 if (!s->nb_programs) {
967 /* allocate a single DVB service */
968 if (!mpegts_add_service(s, ts->service_id, s->metadata, NULL))
969 return AVERROR(ENOMEM);
971 for (i = 0; i < s->nb_programs; i++) {
972 AVProgram *program = s->programs[i];
973 if (!mpegts_add_service(s, program->id, program->metadata, program))
974 return AVERROR(ENOMEM);
978 ts->pat.pid = PAT_PID;
979 /* Initialize at 15 so that it wraps and is equal to 0 for the
980 * first packet we write. */
982 ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
983 ts->pat.write_packet = section_write_packet;
986 ts->sdt.pid = SDT_PID;
988 ts->sdt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
989 ts->sdt.write_packet = section_write_packet;
992 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
994 ret = AVERROR(ENOMEM);
998 /* assign pids to each stream */
999 for (i = 0; i < s->nb_streams; i++) {
1000 AVStream *st = s->streams[i];
1001 MpegTSWriteStream *ts_st;
1003 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
1005 ret = AVERROR(ENOMEM);
1008 st->priv_data = ts_st;
1010 avpriv_set_pts_info(st, 33, 1, 90000);
1012 ts_st->payload = av_mallocz(ts->pes_payload_size);
1013 if (!ts_st->payload) {
1014 ret = AVERROR(ENOMEM);
1018 /* MPEG pid values < 16 are reserved. Applications which set st->id in
1019 * this range are assigned a calculated pid. */
1021 if (ts->m2ts_mode) {
1022 switch (st->codecpar->codec_type) {
1023 case AVMEDIA_TYPE_VIDEO:
1024 ts_st->pid = ts->m2ts_video_pid++;
1026 case AVMEDIA_TYPE_AUDIO:
1027 ts_st->pid = ts->m2ts_audio_pid++;
1029 case AVMEDIA_TYPE_SUBTITLE:
1030 switch (st->codecpar->codec_id) {
1031 case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
1032 ts_st->pid = ts->m2ts_pgssub_pid++;
1034 case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
1035 ts_st->pid = ts->m2ts_textsub_pid++;
1040 if (ts->m2ts_video_pid > M2TS_VIDEO_PID + 1 ||
1041 ts->m2ts_audio_pid > M2TS_AUDIO_START_PID + 32 ||
1042 ts->m2ts_pgssub_pid > M2TS_PGSSUB_START_PID + 32 ||
1043 ts->m2ts_textsub_pid > M2TS_TEXTSUB_PID + 1 ||
1045 av_log(s, AV_LOG_ERROR, "Cannot automatically assign PID for stream %d\n", st->index);
1046 ret = AVERROR(EINVAL);
1050 ts_st->pid = ts->start_pid + i;
1053 ts_st->pid = st->id;
1055 if (ts_st->pid >= 0x1FFF) {
1056 av_log(s, AV_LOG_ERROR,
1057 "Invalid stream id %d, must be less than 8191\n", st->id);
1058 ret = AVERROR(EINVAL);
1061 for (j = 0; j < ts->nb_services; j++) {
1062 if (ts->services[j]->pmt.pid > LAST_OTHER_PID) {
1063 av_log(s, AV_LOG_ERROR,
1064 "Invalid PMT PID %d, must be less than %d\n", ts->services[j]->pmt.pid, LAST_OTHER_PID + 1);
1065 ret = AVERROR(EINVAL);
1068 if (ts_st->pid == ts->services[j]->pmt.pid) {
1069 av_log(s, AV_LOG_ERROR, "PID %d cannot be both elementary and PMT PID\n", ts_st->pid);
1070 ret = AVERROR(EINVAL);
1074 for (j = 0; j < i; j++) {
1075 if (pids[j] == ts_st->pid) {
1076 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
1077 ret = AVERROR(EINVAL);
1081 pids[i] = ts_st->pid;
1082 ts_st->payload_pts = AV_NOPTS_VALUE;
1083 ts_st->payload_dts = AV_NOPTS_VALUE;
1084 ts_st->first_pts_check = 1;
1086 ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
1087 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1088 st->codecpar->extradata_size > 0) {
1090 ts_st->amux = avformat_alloc_context();
1092 ret = AVERROR(ENOMEM);
1095 ts_st->amux->oformat =
1096 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
1098 if (!ts_st->amux->oformat) {
1099 ret = AVERROR(EINVAL);
1102 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
1103 ret = AVERROR(ENOMEM);
1106 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
1109 ast->time_base = st->time_base;
1110 ret = avformat_write_header(ts_st->amux, NULL);
1114 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1115 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
1122 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
1124 select_pcr_streams(s);
1126 ts->last_pat_ts = AV_NOPTS_VALUE;
1127 ts->last_sdt_ts = AV_NOPTS_VALUE;
1128 ts->pat_period = av_rescale(ts->pat_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1129 ts->sdt_period = av_rescale(ts->sdt_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1131 if (ts->mux_rate == 1)
1132 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
1134 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
1135 av_log(s, AV_LOG_VERBOSE,
1136 "sdt every %"PRId64" ms, pat/pmt every %"PRId64" ms\n",
1137 av_rescale(ts->sdt_period, 1000, PCR_TIME_BASE),
1138 av_rescale(ts->pat_period, 1000, PCR_TIME_BASE));
1147 /* send SDT, PAT and PMT tables regularly */
1148 static void retransmit_si_info(AVFormatContext *s, int force_pat, int force_sdt, int64_t pcr)
1150 MpegTSWrite *ts = s->priv_data;
1153 if ((pcr != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1154 (pcr != AV_NOPTS_VALUE && pcr - ts->last_sdt_ts >= ts->sdt_period) ||
1157 if (pcr != AV_NOPTS_VALUE)
1158 ts->last_sdt_ts = FFMAX(pcr, ts->last_sdt_ts);
1159 mpegts_write_sdt(s);
1161 if ((pcr != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1162 (pcr != AV_NOPTS_VALUE && pcr - ts->last_pat_ts >= ts->pat_period) ||
1164 if (pcr != AV_NOPTS_VALUE)
1165 ts->last_pat_ts = FFMAX(pcr, ts->last_pat_ts);
1166 mpegts_write_pat(s);
1167 for (i = 0; i < ts->nb_services; i++)
1168 mpegts_write_pmt(s, ts->services[i]);
1172 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1174 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1176 *buf++ = pcr_high >> 25;
1177 *buf++ = pcr_high >> 17;
1178 *buf++ = pcr_high >> 9;
1179 *buf++ = pcr_high >> 1;
1180 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1186 /* Write a single null transport stream packet */
1187 static void mpegts_insert_null_packet(AVFormatContext *s)
1190 uint8_t buf[TS_PACKET_SIZE];
1197 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1198 write_packet(s, buf);
1201 /* Write a single transport stream packet with a PCR and no payload */
1202 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1204 MpegTSWrite *ts = s->priv_data;
1205 MpegTSWriteStream *ts_st = st->priv_data;
1207 uint8_t buf[TS_PACKET_SIZE];
1211 *q++ = ts_st->pid >> 8;
1213 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1214 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1215 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1216 *q++ = 0x10; /* Adaptation flags: PCR present */
1217 if (ts_st->discontinuity) {
1219 ts_st->discontinuity = 0;
1222 /* PCR coded into 6 bytes */
1223 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1225 /* stuffing bytes */
1226 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1227 write_packet(s, buf);
1230 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1234 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1236 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1239 val = (((pts) & 0x7fff) << 1) | 1;
1244 /* Set an adaptation field flag in an MPEG-TS packet*/
1245 static void set_af_flag(uint8_t *pkt, int flag)
1247 // expect at least one flag to set
1250 if ((pkt[3] & 0x20) == 0) {
1251 // no AF yet, set adaptation field flag
1253 // 1 byte length, no flags
1260 /* Extend the adaptation field by size bytes */
1261 static void extend_af(uint8_t *pkt, int size)
1263 // expect already existing adaptation field
1264 av_assert0(pkt[3] & 0x20);
1268 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1269 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1272 return pkt + 5 + pkt[4];
1277 /* Add a PES header to the front of the payload, and segment into an integer
1278 * number of TS packets. The final TS packet is padded using an oversized
1279 * adaptation header to exactly fill the last TS packet.
1280 * NOTE: 'payload' contains a complete PES payload. */
1281 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1282 const uint8_t *payload, int payload_size,
1283 int64_t pts, int64_t dts, int key, int stream_id)
1285 MpegTSWriteStream *ts_st = st->priv_data;
1286 MpegTSWrite *ts = s->priv_data;
1287 uint8_t buf[TS_PACKET_SIZE];
1289 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1290 int afc_len, stuffing_len;
1291 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1292 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1295 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1296 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1300 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1303 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1307 while (payload_size > 0) {
1308 int64_t pcr = AV_NOPTS_VALUE;
1309 if (ts->mux_rate > 1)
1310 pcr = get_pcr(ts, s->pb);
1311 else if (dts != AV_NOPTS_VALUE)
1312 pcr = (dts - delay) * 300;
1314 retransmit_si_info(s, force_pat, force_sdt, pcr);
1319 if (ts->mux_rate > 1) {
1320 /* Send PCR packets for all PCR streams if needed */
1321 pcr = get_pcr(ts, s->pb);
1322 if (pcr >= ts->next_pcr) {
1323 int64_t next_pcr = INT64_MAX;
1324 for (int i = 0; i < s->nb_streams; i++) {
1325 /* Make the current stream the last, because for that we
1326 * can insert the pcr into the payload later */
1327 int st2_index = i < st->index ? i : (i + 1 == s->nb_streams ? st->index : i + 1);
1328 AVStream *st2 = s->streams[st2_index];
1329 MpegTSWriteStream *ts_st2 = st2->priv_data;
1330 if (ts_st2->pcr_period) {
1331 if (pcr - ts_st2->last_pcr >= ts_st2->pcr_period) {
1332 ts_st2->last_pcr = FFMAX(pcr - ts_st2->pcr_period, ts_st2->last_pcr + ts_st2->pcr_period);
1334 mpegts_insert_pcr_only(s, st2);
1335 pcr = get_pcr(ts, s->pb);
1340 next_pcr = FFMIN(next_pcr, ts_st2->last_pcr + ts_st2->pcr_period);
1343 ts->next_pcr = next_pcr;
1345 if (dts != AV_NOPTS_VALUE && (dts - pcr / 300) > delay) {
1346 /* pcr insert gets priority over null packet insert */
1348 mpegts_insert_pcr_only(s, st);
1350 mpegts_insert_null_packet(s);
1351 /* recalculate write_pcr and possibly retransmit si_info */
1354 } else if (ts_st->pcr_period && pcr != AV_NOPTS_VALUE) {
1355 if (pcr - ts_st->last_pcr >= ts_st->pcr_period && is_start) {
1356 ts_st->last_pcr = FFMAX(pcr - ts_st->pcr_period, ts_st->last_pcr + ts_st->pcr_period);
1361 /* prepare packet header */
1364 val = ts_st->pid >> 8;
1365 if (ts->m2ts_mode && st->codecpar->codec_id == AV_CODEC_ID_AC3)
1371 ts_st->cc = ts_st->cc + 1 & 0xf;
1372 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1373 if (ts_st->discontinuity) {
1374 set_af_flag(buf, 0x80);
1375 q = get_ts_payload_start(buf);
1376 ts_st->discontinuity = 0;
1378 if (key && is_start && pts != AV_NOPTS_VALUE) {
1379 // set Random Access for key frames
1380 if (ts_st->pcr_period)
1382 set_af_flag(buf, 0x40);
1383 q = get_ts_payload_start(buf);
1386 set_af_flag(buf, 0x10);
1387 q = get_ts_payload_start(buf);
1388 // add 11, pcr references the last byte of program clock reference base
1389 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1390 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1391 extend_af(buf, write_pcr_bits(q, pcr));
1392 q = get_ts_payload_start(buf);
1395 int pes_extension = 0;
1396 int pes_header_stuffing_bytes = 0;
1397 /* write PES header */
1401 is_dvb_subtitle = 0;
1402 is_dvb_teletext = 0;
1403 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1404 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1408 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1409 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1410 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1411 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1413 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1414 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1417 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
1418 st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
1420 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1421 *q++ = stream_id != -1 ? stream_id : 0xfc;
1423 if (stream_id == 0xbd) /* asynchronous KLV */
1424 pts = dts = AV_NOPTS_VALUE;
1427 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1428 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1429 is_dvb_subtitle = 1;
1430 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1431 is_dvb_teletext = 1;
1437 if (pts != AV_NOPTS_VALUE) {
1441 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1445 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1446 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1447 /* set PES_extension_flag */
1451 /* One byte for PES2 extension flag +
1452 * one byte for extension length +
1453 * one byte for extension id */
1456 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1457 * otherwise it will not play sound on blu-ray
1459 if (ts->m2ts_mode &&
1460 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1461 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1462 /* set PES_extension_flag */
1467 if (is_dvb_teletext) {
1468 pes_header_stuffing_bytes = 0x24 - header_len;
1471 len = payload_size + header_len + 3;
1472 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1473 if (is_dvb_subtitle) {
1479 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1485 /* data alignment indicator is required for subtitle and data streams */
1486 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1491 if (pts != AV_NOPTS_VALUE) {
1492 write_pts(q, flags >> 6, pts);
1495 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1496 write_pts(q, 1, dts);
1499 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1500 flags = 0x01; /* set PES_extension_flag_2 */
1502 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1503 /* Set the stream ID extension flag bit to 0 and
1504 * write the extended stream ID. */
1507 /* For Blu-ray AC3 Audio Setting extended flags */
1508 if (ts->m2ts_mode &&
1510 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1511 flags = 0x01; /* set PES_extension_flag_2 */
1513 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1514 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1518 if (is_dvb_subtitle) {
1519 /* First two fields of DVB subtitles PES data:
1520 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1521 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1525 if (is_dvb_teletext) {
1526 memset(q, 0xff, pes_header_stuffing_bytes);
1527 q += pes_header_stuffing_bytes;
1532 header_len = q - buf;
1534 len = TS_PACKET_SIZE - header_len;
1535 if (len > payload_size)
1537 stuffing_len = TS_PACKET_SIZE - header_len - len;
1538 if (stuffing_len > 0) {
1539 /* add stuffing with AFC */
1540 if (buf[3] & 0x20) {
1541 /* stuffing already present: increase its size */
1542 afc_len = buf[4] + 1;
1543 memmove(buf + 4 + afc_len + stuffing_len,
1545 header_len - (4 + afc_len));
1546 buf[4] += stuffing_len;
1547 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1550 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1552 buf[4] = stuffing_len - 1;
1553 if (stuffing_len >= 2) {
1555 memset(buf + 6, 0xff, stuffing_len - 2);
1560 if (is_dvb_subtitle && payload_size == len) {
1561 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1562 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1564 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1568 payload_size -= len;
1569 write_packet(s, buf);
1571 ts_st->prev_payload_key = key;
1574 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1576 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1577 if (!st->nb_frames) {
1578 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1579 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1580 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1581 return AVERROR_INVALIDDATA;
1583 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1585 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1586 av_log(s, AV_LOG_WARNING, "\n");
1591 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1593 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1594 if (!st->nb_frames) {
1595 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1596 return AVERROR_PATCHWELCOME;
1598 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1600 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1601 av_log(s, AV_LOG_WARNING, "\n");
1606 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1607 * Released under the LGPL v2.1+, written by
1608 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1610 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1612 static const int durations[32] = {
1613 480, 960, 1920, 2880, /* Silk NB */
1614 480, 960, 1920, 2880, /* Silk MB */
1615 480, 960, 1920, 2880, /* Silk WB */
1616 480, 960, /* Hybrid SWB */
1617 480, 960, /* Hybrid FB */
1618 120, 240, 480, 960, /* CELT NB */
1619 120, 240, 480, 960, /* CELT NB */
1620 120, 240, 480, 960, /* CELT NB */
1621 120, 240, 480, 960, /* CELT NB */
1623 int toc, frame_duration, nframes, duration;
1630 frame_duration = durations[toc >> 3];
1644 nframes = pkt->data[1] & 63;
1648 duration = nframes * frame_duration;
1649 if (duration > 5760) {
1650 av_log(s, AV_LOG_WARNING,
1651 "Opus packet duration > 120 ms, invalid");
1658 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1660 AVStream *st = s->streams[pkt->stream_index];
1661 int size = pkt->size;
1662 uint8_t *buf = pkt->data;
1663 uint8_t *data = NULL;
1664 MpegTSWrite *ts = s->priv_data;
1665 MpegTSWriteStream *ts_st = st->priv_data;
1666 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1667 const int64_t max_audio_delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) / 2;
1668 int64_t dts = pkt->dts, pts = pkt->pts;
1669 int opus_samples = 0;
1671 uint8_t *side_data = NULL;
1674 side_data = av_packet_get_side_data(pkt,
1675 AV_PKT_DATA_MPEGTS_STREAM_ID,
1678 stream_id = side_data[0];
1680 if (ts->copyts < 1) {
1681 if (pts != AV_NOPTS_VALUE)
1683 if (dts != AV_NOPTS_VALUE)
1687 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1688 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1689 return AVERROR_INVALIDDATA;
1691 ts_st->first_pts_check = 0;
1693 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1694 const uint8_t *p = buf, *buf_end = p + size;
1695 uint32_t state = -1;
1696 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1697 int ret = ff_check_h264_startcode(s, st, pkt);
1701 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1705 p = avpriv_find_start_code(p, buf_end, &state);
1706 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", state & 0x1f);
1707 if ((state & 0x1f) == 7)
1709 } while (p < buf_end && (state & 0x1f) != 9 &&
1710 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1712 if ((state & 0x1f) != 5)
1714 if ((state & 0x1f) != 9) { // AUD NAL
1715 data = av_malloc(pkt->size + 6 + extradd);
1717 return AVERROR(ENOMEM);
1718 memcpy(data + 6, st->codecpar->extradata, extradd);
1719 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1720 AV_WB32(data, 0x00000001);
1722 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1724 size = pkt->size + 6 + extradd;
1726 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1727 if (pkt->size < 2) {
1728 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1729 return AVERROR_INVALIDDATA;
1731 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1736 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1737 "and extradata missing\n");
1739 av_init_packet(&pkt2);
1740 pkt2.data = pkt->data;
1741 pkt2.size = pkt->size;
1742 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1743 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1745 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1749 ret = av_write_frame(ts_st->amux, &pkt2);
1751 ffio_free_dyn_buf(&ts_st->amux->pb);
1754 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1755 ts_st->amux->pb = NULL;
1759 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1760 const uint8_t *p = buf, *buf_end = p + size;
1761 uint32_t state = -1;
1762 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1763 int ret = check_hevc_startcode(s, st, pkt);
1767 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1771 p = avpriv_find_start_code(p, buf_end, &state);
1772 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", (state & 0x7e)>>1);
1773 if ((state & 0x7e) == 2*32)
1775 } while (p < buf_end && (state & 0x7e) != 2*35 &&
1776 (state & 0x7e) >= 2*32);
1778 if ((state & 0x7e) < 2*16 || (state & 0x7e) >= 2*24)
1780 if ((state & 0x7e) != 2*35) { // AUD NAL
1781 data = av_malloc(pkt->size + 7 + extradd);
1783 return AVERROR(ENOMEM);
1784 memcpy(data + 7, st->codecpar->extradata, extradd);
1785 memcpy(data + 7 + extradd, pkt->data, pkt->size);
1786 AV_WB32(data, 0x00000001);
1789 data[6] = 0x50; // any slice type (0x4) + rbsp stop one bit
1791 size = pkt->size + 7 + extradd;
1793 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1794 if (pkt->size < 2) {
1795 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1796 return AVERROR_INVALIDDATA;
1799 /* Add Opus control header */
1800 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1804 int ctrl_header_size;
1805 int trim_start = 0, trim_end = 0;
1807 opus_samples = opus_get_packet_samples(s, pkt);
1809 side_data = av_packet_get_side_data(pkt,
1810 AV_PKT_DATA_SKIP_SAMPLES,
1813 if (side_data && side_data_size >= 10) {
1814 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1817 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1818 if (ts_st->opus_pending_trim_start)
1819 ctrl_header_size += 2;
1821 ctrl_header_size += 2;
1823 data = av_malloc(ctrl_header_size);
1825 return AVERROR(ENOMEM);
1829 if (ts_st->opus_pending_trim_start)
1837 data[i] = FFMIN(n, 255);
1842 av_assert0(2 + pkt->size / 255 + 1 == i);
1844 if (ts_st->opus_pending_trim_start) {
1845 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1846 AV_WB16(data + i, trim_start);
1848 ts_st->opus_pending_trim_start -= trim_start;
1851 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1852 AV_WB16(data + i, trim_end);
1856 memcpy(data + i, pkt->data, pkt->size);
1858 size = ctrl_header_size;
1860 /* TODO: Can we get TS formatted data here? If so we will
1861 * need to count the samples of that too! */
1862 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1866 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1867 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1868 dts - ts_st->payload_dts >= max_audio_delay) ||
1869 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1870 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1871 ts_st->payload_pts, ts_st->payload_dts,
1872 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1873 ts_st->payload_size = 0;
1874 ts_st->opus_queued_samples = 0;
1877 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1878 av_assert0(!ts_st->payload_size);
1879 // for video and subtitle, write a single pes packet
1880 mpegts_write_pes(s, st, buf, size, pts, dts,
1881 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1882 ts_st->opus_queued_samples = 0;
1887 if (!ts_st->payload_size) {
1888 ts_st->payload_pts = pts;
1889 ts_st->payload_dts = dts;
1890 ts_st->payload_flags = pkt->flags;
1893 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1894 ts_st->payload_size += size;
1895 ts_st->opus_queued_samples += opus_samples;
1902 static void mpegts_write_flush(AVFormatContext *s)
1904 MpegTSWrite *ts = s->priv_data;
1907 /* flush current packets */
1908 for (i = 0; i < s->nb_streams; i++) {
1909 AVStream *st = s->streams[i];
1910 MpegTSWriteStream *ts_st = st->priv_data;
1911 if (ts_st->payload_size > 0) {
1912 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1913 ts_st->payload_pts, ts_st->payload_dts,
1914 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1915 ts_st->payload_size = 0;
1916 ts_st->opus_queued_samples = 0;
1920 if (ts->m2ts_mode) {
1921 int packets = (avio_tell(s->pb) / (TS_PACKET_SIZE + 4)) % 32;
1922 while (packets++ < 32)
1923 mpegts_insert_null_packet(s);
1927 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1930 mpegts_write_flush(s);
1933 return mpegts_write_packet_internal(s, pkt);
1937 static int mpegts_write_end(AVFormatContext *s)
1940 mpegts_write_flush(s);
1945 static void mpegts_deinit(AVFormatContext *s)
1947 MpegTSWrite *ts = s->priv_data;
1948 MpegTSService *service;
1951 for (i = 0; i < s->nb_streams; i++) {
1952 AVStream *st = s->streams[i];
1953 MpegTSWriteStream *ts_st = st->priv_data;
1955 av_freep(&ts_st->payload);
1957 avformat_free_context(ts_st->amux);
1963 for (i = 0; i < ts->nb_services; i++) {
1964 service = ts->services[i];
1967 av_freep(&ts->services);
1970 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1973 AVStream *st = s->streams[pkt->stream_index];
1975 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1976 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1977 (AV_RB24(pkt->data) != 0x000001 ||
1978 (st->codecpar->extradata_size > 0 &&
1979 st->codecpar->extradata[0] == 1)))
1980 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1981 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1982 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1983 (AV_RB24(pkt->data) != 0x000001 ||
1984 (st->codecpar->extradata_size > 0 &&
1985 st->codecpar->extradata[0] == 1)))
1986 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1992 static const AVOption options[] = {
1993 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1994 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1995 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1996 { "mpegts_original_network_id", "Set original_network_id field.",
1997 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1998 { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1999 { "mpegts_service_id", "Set service_id field.",
2000 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
2001 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
2002 { "mpegts_service_type", "Set service_type field.",
2003 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
2004 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
2005 { "digital_tv", "Digital Television.",
2006 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
2007 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
2008 { "digital_radio", "Digital Radio.",
2009 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
2010 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
2011 { "teletext", "Teletext.",
2012 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
2013 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
2014 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
2015 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
2016 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
2017 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
2018 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
2019 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
2020 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
2021 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
2022 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
2023 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
2024 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
2025 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
2026 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
2027 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff,
2028 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
2029 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
2030 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
2031 { .i64 = 0x1000 }, FIRST_OTHER_PID, LAST_OTHER_PID, AV_OPT_FLAG_ENCODING_PARAM },
2032 { "mpegts_start_pid", "Set the first pid.",
2033 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
2034 { .i64 = 0x0100 }, FIRST_OTHER_PID, LAST_OTHER_PID, AV_OPT_FLAG_ENCODING_PARAM },
2035 { "mpegts_m2ts_mode", "Enable m2ts mode.",
2036 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
2037 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
2039 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
2040 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
2041 { "pes_payload_size", "Minimum PES packet payload in bytes",
2042 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
2043 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
2044 { "mpegts_flags", "MPEG-TS muxing flags",
2045 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
2046 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
2047 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
2048 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
2049 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
2050 { "latm", "Use LATM packetization for AAC",
2051 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
2052 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
2053 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
2054 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
2055 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
2056 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
2057 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
2058 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
2059 { "initial_discontinuity", "Mark initial packets as discontinuous",
2060 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX,
2061 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
2062 { "mpegts_copyts", "don't offset dts/pts",
2063 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
2064 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
2065 { "tables_version", "set PAT, PMT and SDT version",
2066 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
2067 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
2068 { "omit_video_pes_length", "Omit the PES packet length for video packets",
2069 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
2070 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
2071 { "pcr_period", "PCR retransmission time in milliseconds",
2072 offsetof(MpegTSWrite, pcr_period_ms), AV_OPT_TYPE_INT,
2073 { .i64 = -1 }, -1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
2074 { "pat_period", "PAT/PMT retransmission time limit in seconds",
2075 offsetof(MpegTSWrite, pat_period_us), AV_OPT_TYPE_DURATION,
2076 { .i64 = PAT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM },
2077 { "sdt_period", "SDT retransmission time limit in seconds",
2078 offsetof(MpegTSWrite, sdt_period_us), AV_OPT_TYPE_DURATION,
2079 { .i64 = SDT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM },
2083 static const AVClass mpegts_muxer_class = {
2084 .class_name = "MPEGTS muxer",
2085 .item_name = av_default_item_name,
2087 .version = LIBAVUTIL_VERSION_INT,
2090 AVOutputFormat ff_mpegts_muxer = {
2092 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2093 .mime_type = "video/MP2T",
2094 .extensions = "ts,m2t,m2ts,mts",
2095 .priv_data_size = sizeof(MpegTSWrite),
2096 .audio_codec = AV_CODEC_ID_MP2,
2097 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
2098 .init = mpegts_init,
2099 .write_packet = mpegts_write_packet,
2100 .write_trailer = mpegts_write_end,
2101 .deinit = mpegts_deinit,
2102 .check_bitstream = mpegts_check_bitstream,
2103 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS | AVFMT_NODIMENSIONS,
2104 .priv_class = &mpegts_muxer_class,