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 */
84 int mux_rate; ///< set to 1 when VBR
87 int transport_stream_id;
88 int original_network_id;
101 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
102 #define MPEGTS_FLAG_AAC_LATM 0x02
103 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
104 #define MPEGTS_FLAG_SYSTEM_B 0x08
105 #define MPEGTS_FLAG_DISCONT 0x10
109 int64_t pat_period_us;
110 int64_t sdt_period_us;
114 int omit_video_pes_length;
117 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
118 #define DEFAULT_PES_HEADER_FREQ 16
119 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
121 /* The section length is 12 bits. The first 2 are set to 0, the remaining
122 * 10 bits should not exceed 1021. */
123 #define SECTION_LENGTH 1020
125 /* NOTE: 4 bytes must be left at the end for the crc32 */
126 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
129 unsigned char packet[TS_PACKET_SIZE];
130 const unsigned char *buf_ptr;
132 int first, b, len1, left;
134 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
137 buf[len - 4] = (crc >> 24) & 0xff;
138 buf[len - 3] = (crc >> 16) & 0xff;
139 buf[len - 2] = (crc >> 8) & 0xff;
140 buf[len - 1] = crc & 0xff;
142 /* send each packet */
145 first = buf == buf_ptr;
153 s->cc = s->cc + 1 & 0xf;
155 if (s->discontinuity) {
159 s->discontinuity = 0;
162 *q++ = 0; /* 0 offset */
163 len1 = TS_PACKET_SIZE - (q - packet);
166 memcpy(q, buf_ptr, len1);
168 /* add known padding data */
169 left = TS_PACKET_SIZE - (q - packet);
171 memset(q, 0xff, left);
173 s->write_packet(s, packet);
180 static inline void put16(uint8_t **q_ptr, int val)
189 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
190 int version, int sec_num, int last_sec_num,
191 uint8_t *buf, int len)
193 uint8_t section[1024], *q;
194 unsigned int tot_len;
195 /* reserved_future_use field must be set to 1 for SDT */
196 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
198 tot_len = 3 + 5 + len + 4;
199 /* check if not too big */
201 return AVERROR_INVALIDDATA;
205 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
207 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
212 mpegts_write_section(s, section, tot_len);
216 /*********************************************/
219 #define DEFAULT_PROVIDER_NAME "FFmpeg"
220 #define DEFAULT_SERVICE_NAME "Service"
222 /* we retransmit the SI info at this rate */
223 #define SDT_RETRANS_TIME 500
224 #define PAT_RETRANS_TIME 100
225 #define PCR_RETRANS_TIME 20
227 typedef struct MpegTSWriteStream {
228 int pid; /* stream associated pid */
232 int first_pts_check; ///< first pts check needed
233 int prev_payload_key;
238 AVFormatContext *amux;
241 int64_t pcr_period; /* PCR period in PCR time base */
245 int opus_queued_samples;
246 int opus_pending_trim_start;
249 static void mpegts_write_pat(AVFormatContext *s)
251 MpegTSWrite *ts = s->priv_data;
252 MpegTSService *service;
253 uint8_t data[SECTION_LENGTH], *q;
257 for (i = 0; i < ts->nb_services; i++) {
258 service = ts->services[i];
259 put16(&q, service->sid);
260 put16(&q, 0xe000 | service->pmt.pid);
262 mpegts_write_section1(&ts->pat, PAT_TID, ts->transport_stream_id, ts->tables_version, 0, 0,
266 static void putbuf(uint8_t **q_ptr, const uint8_t *buf, size_t len)
268 memcpy(*q_ptr, buf, len);
272 static void put_registration_descriptor(uint8_t **q_ptr, uint32_t tag)
275 *q++ = 0x05; /* MPEG-2 registration descriptor*/
284 static int get_dvb_stream_type(AVFormatContext *s, AVStream *st)
286 MpegTSWrite *ts = s->priv_data;
287 MpegTSWriteStream *ts_st = st->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;
352 case AV_CODEC_ID_DVB_SUBTITLE:
353 case AV_CODEC_ID_DVB_TELETEXT:
354 stream_type = STREAM_TYPE_PRIVATE_DATA;
356 case AV_CODEC_ID_SMPTE_KLV:
357 if (st->codecpar->profile == FF_PROFILE_KLVA_SYNC) {
358 stream_type = STREAM_TYPE_METADATA;
360 stream_type = STREAM_TYPE_PRIVATE_DATA;
364 av_log_once(s, AV_LOG_WARNING, AV_LOG_DEBUG, &ts_st->data_st_warning,
365 "Stream %d, codec %s, is muxed as a private data stream "
366 "and may not be recognized upon reading.\n", st->index,
367 avcodec_get_name(st->codecpar->codec_id));
368 stream_type = STREAM_TYPE_PRIVATE_DATA;
375 static int get_m2ts_stream_type(AVFormatContext *s, AVStream *st)
378 MpegTSWriteStream *ts_st = st->priv_data;
380 switch (st->codecpar->codec_id) {
381 case AV_CODEC_ID_MPEG2VIDEO:
382 stream_type = STREAM_TYPE_VIDEO_MPEG2;
384 case AV_CODEC_ID_H264:
385 stream_type = STREAM_TYPE_VIDEO_H264;
387 case AV_CODEC_ID_VC1:
388 stream_type = STREAM_TYPE_VIDEO_VC1;
390 case AV_CODEC_ID_HEVC:
391 stream_type = STREAM_TYPE_VIDEO_HEVC;
393 case AV_CODEC_ID_PCM_BLURAY:
396 case AV_CODEC_ID_AC3:
399 case AV_CODEC_ID_DTS:
400 stream_type = (st->codecpar->channels > 6) ? 0x85 : 0x82;
402 case AV_CODEC_ID_TRUEHD:
405 case AV_CODEC_ID_EAC3:
408 case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
411 case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
415 av_log_once(s, AV_LOG_WARNING, AV_LOG_DEBUG, &ts_st->data_st_warning,
416 "Stream %d, codec %s, is muxed as a private data stream "
417 "and may not be recognized upon reading.\n", st->index,
418 avcodec_get_name(st->codecpar->codec_id));
419 stream_type = STREAM_TYPE_PRIVATE_DATA;
426 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
428 MpegTSWrite *ts = s->priv_data;
429 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
430 int val, stream_type, i, err = 0;
433 put16(&q, 0xe000 | service->pcr_pid);
435 program_info_length_ptr = q;
436 q += 2; /* patched after */
438 /* put program info here */
440 put_registration_descriptor(&q, MKTAG('H', 'D', 'M', 'V'));
441 *q++ = 0x88; // descriptor_tag - hdmv_copy_control_descriptor
442 *q++ = 0x04; // descriptor_length
443 put16(&q, 0x0fff); // CA_System_ID
444 *q++ = 0xfc; // private_data_byte
445 *q++ = 0xfc; // private_data_byte
448 val = 0xf000 | (q - program_info_length_ptr - 2);
449 program_info_length_ptr[0] = val >> 8;
450 program_info_length_ptr[1] = val;
452 for (i = 0; i < s->nb_streams; i++) {
453 AVStream *st = s->streams[i];
454 MpegTSWriteStream *ts_st = st->priv_data;
455 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
457 if (s->nb_programs) {
459 AVProgram *program = service->program;
461 for (k = 0; k < program->nb_stream_indexes; k++)
462 if (program->stream_index[k] == i) {
471 if (q - data > SECTION_LENGTH - 32) {
476 stream_type = ts->m2ts_mode ? get_m2ts_stream_type(s, st) : get_dvb_stream_type(s, st);
479 put16(&q, 0xe000 | ts_st->pid);
481 q += 2; /* patched after */
483 /* write optional descriptors here */
484 switch (st->codecpar->codec_type) {
485 case AVMEDIA_TYPE_AUDIO:
486 if (ts->flags & MPEGTS_FLAG_SYSTEM_B) {
487 if (st->codecpar->codec_id==AV_CODEC_ID_AC3) {
488 *q++=0x6a; // AC3 descriptor see A038 DVB SI
489 *q++=1; // 1 byte, all flags sets to 0
490 *q++=0; // omit all fields...
491 } else if (st->codecpar->codec_id==AV_CODEC_ID_EAC3) {
492 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
493 *q++=1; // 1 byte, all flags sets to 0
494 *q++=0; // omit all fields...
497 if (st->codecpar->codec_id==AV_CODEC_ID_S302M)
498 put_registration_descriptor(&q, MKTAG('B', 'S', 'S', 'D'));
499 if (st->codecpar->codec_id==AV_CODEC_ID_OPUS) {
500 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
501 if (q - data > SECTION_LENGTH - 6 - 4) {
506 put_registration_descriptor(&q, MKTAG('O', 'p', 'u', 's'));
508 *q++ = 0x7f; /* DVB extension descriptor */
512 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
513 if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
514 /* RTP mapping family */
515 *q++ = st->codecpar->channels;
516 } else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
517 st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
518 static const uint8_t coupled_stream_counts[9] = {
519 1, 0, 1, 1, 2, 2, 2, 3, 3
521 static const uint8_t channel_map_a[8][8] = {
528 {0, 4, 1, 2, 3, 5, 6},
529 {0, 6, 1, 2, 3, 4, 5, 7},
531 static const uint8_t channel_map_b[8][8] = {
538 {0, 1, 2, 3, 4, 5, 6},
539 {0, 1, 2, 3, 4, 5, 6, 7},
541 /* Vorbis mapping family */
543 if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
544 st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
545 memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
546 *q++ = st->codecpar->channels;
547 } else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
548 st->codecpar->extradata[20] == 0 &&
549 memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
550 *q++ = st->codecpar->channels | 0x80;
552 /* Unsupported, could write an extended descriptor here */
553 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
558 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
561 } else if (st->codecpar->channels <= 2) {
562 /* Assume RTP mapping family */
563 *q++ = st->codecpar->channels;
566 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
573 char *next = lang->value;
576 *q++ = 0x0a; /* ISO 639 language descriptor */
580 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
581 if (q - data > SECTION_LENGTH - 4) {
585 next = strchr(p, ',');
586 if (strlen(p) != 3 && (!next || next != p + 3))
587 continue; /* not a 3-letter code */
593 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
595 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
597 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
600 *q++ = 0; /* undefined type */
606 q -= 2; /* no language codes were written */
609 case AVMEDIA_TYPE_SUBTITLE:
611 const char default_language[] = "und";
612 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
614 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
616 int extradata_copied = 0;
618 *q++ = 0x59; /* subtitling_descriptor */
621 while (strlen(language) >= 3) {
622 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
630 if (*language != '\0')
633 if (st->codecpar->extradata_size - extradata_copied >= 5) {
634 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
635 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
636 extradata_copied += 5;
640 * 0x10 - normal with no monitor aspect ratio criticality
641 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
642 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
643 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
644 /* support of old 4-byte extradata format */
645 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
646 extradata_copied += 4;
649 put16(&q, 1); /* composition_page_id */
650 put16(&q, 1); /* ancillary_page_id */
655 *len_ptr = q - len_ptr - 1;
656 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
657 uint8_t *len_ptr = NULL;
658 int extradata_copied = 0;
660 /* The descriptor tag. teletext_descriptor */
664 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
669 if (*language != '\0')
672 if (st->codecpar->extradata_size - 1 > extradata_copied) {
673 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
674 extradata_copied += 2;
677 /* The Teletext descriptor:
678 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
679 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
680 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
686 *len_ptr = q - len_ptr - 1;
690 case AVMEDIA_TYPE_VIDEO:
691 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
692 put_registration_descriptor(&q, MKTAG('d', 'r', 'a', 'c'));
693 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
694 put_registration_descriptor(&q, MKTAG('V', 'C', '-', '1'));
695 } else if (stream_type == STREAM_TYPE_VIDEO_HEVC && s->strict_std_compliance <= FF_COMPLIANCE_NORMAL) {
696 put_registration_descriptor(&q, MKTAG('H', 'E', 'V', 'C'));
699 case AVMEDIA_TYPE_DATA:
700 if (st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV) {
701 put_registration_descriptor(&q, MKTAG('K', 'L', 'V', 'A'));
702 } else if (st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
703 const char *tag = "ID3 ";
704 *q++ = 0x26; /* metadata descriptor */
706 put16(&q, 0xffff); /* metadata application format */
707 putbuf(&q, tag, strlen(tag));
708 *q++ = 0xff; /* metadata format */
709 putbuf(&q, tag, strlen(tag));
710 *q++ = 0; /* metadata service ID */
711 *q++ = 0xF; /* metadata_locator_record_flag|MPEG_carriage_flags|reserved */
716 val = 0xf000 | (q - desc_length_ptr - 2);
717 desc_length_ptr[0] = val >> 8;
718 desc_length_ptr[1] = val;
722 av_log(s, AV_LOG_ERROR,
723 "The PMT section cannot fit stream %d and all following streams.\n"
724 "Try reducing the number of languages in the audio streams "
725 "or the total number of streams.\n", i);
727 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
732 static void mpegts_write_sdt(AVFormatContext *s)
734 MpegTSWrite *ts = s->priv_data;
735 MpegTSService *service;
736 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
737 int i, running_status, free_ca_mode, val;
740 put16(&q, ts->original_network_id);
742 for (i = 0; i < ts->nb_services; i++) {
743 service = ts->services[i];
744 put16(&q, service->sid);
745 *q++ = 0xfc | 0x00; /* currently no EIT info */
746 desc_list_len_ptr = q;
748 running_status = 4; /* running */
751 /* write only one descriptor for the service name and provider */
755 *q++ = ts->service_type;
756 putbuf(&q, service->provider_name, service->provider_name[0] + 1);
757 putbuf(&q, service->name, service->name[0] + 1);
758 desc_len_ptr[0] = q - desc_len_ptr - 1;
760 /* fill descriptor length */
761 val = (running_status << 13) | (free_ca_mode << 12) |
762 (q - desc_list_len_ptr - 2);
763 desc_list_len_ptr[0] = val >> 8;
764 desc_list_len_ptr[1] = val;
766 mpegts_write_section1(&ts->sdt, SDT_TID, ts->transport_stream_id, ts->tables_version, 0, 0,
770 /* This stores a string in buf with the correct encoding and also sets the
771 * first byte as the length. !str is accepted for an empty string.
772 * If the string is already encoded, invalid UTF-8 or has no multibyte sequence
773 * then we keep it as is, otherwise we signal UTF-8 encoding. */
774 static int encode_str8(uint8_t *buf, const char *str)
779 str_len = strlen(str);
780 if (str[0] && (unsigned)str[0] >= 0x20) { /* Make sure the string is not already encoded. */
781 const uint8_t *q = str;
782 int has_multibyte = 0;
785 GET_UTF8(code, *q++, goto invalid;) /* Is it valid UTF-8? */
786 has_multibyte |= (code > 127); /* Does it have multibyte UTF-8 chars in it? */
788 if (has_multibyte) { /* If we have multibyte chars and valid UTF-8, then encode as such! */
790 return AVERROR(EINVAL);
791 buf[0] = str_len + 1;
793 memcpy(&buf[2], str, str_len);
798 /* Otherwise let's just encode the string as is! */
800 return AVERROR(EINVAL);
802 memcpy(&buf[1], str, str_len);
806 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
808 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
812 static void write_packet(AVFormatContext *s, const uint8_t *packet)
814 MpegTSWrite *ts = s->priv_data;
816 int64_t pcr = get_pcr(s->priv_data, s->pb);
817 uint32_t tp_extra_header = pcr % 0x3fffffff;
818 tp_extra_header = AV_RB32(&tp_extra_header);
819 avio_write(s->pb, (unsigned char *) &tp_extra_header,
820 sizeof(tp_extra_header));
822 avio_write(s->pb, packet, TS_PACKET_SIZE);
825 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
827 AVFormatContext *ctx = s->opaque;
828 write_packet(ctx, packet);
831 static MpegTSService *mpegts_add_service(AVFormatContext *s, int sid,
832 const AVDictionary *metadata,
835 MpegTSWrite *ts = s->priv_data;
836 MpegTSService *service;
837 AVDictionaryEntry *title, *provider;
838 char default_service_name[32];
839 const char *service_name;
840 const char *provider_name;
842 title = av_dict_get(metadata, "service_name", NULL, 0);
844 title = av_dict_get(metadata, "title", NULL, 0);
845 snprintf(default_service_name, sizeof(default_service_name), "%s%02d", DEFAULT_SERVICE_NAME, ts->nb_services + 1);
846 service_name = title ? title->value : default_service_name;
847 provider = av_dict_get(metadata, "service_provider", NULL, 0);
848 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
850 service = av_mallocz(sizeof(MpegTSService));
853 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
855 service->pcr_pid = 0x1fff;
856 if (encode_str8(service->provider_name, provider_name) < 0 ||
857 encode_str8(service->name, service_name) < 0) {
858 av_log(s, AV_LOG_ERROR, "Too long service or provider name\n");
861 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
864 service->pmt.write_packet = section_write_packet;
865 service->pmt.opaque = s;
866 service->pmt.cc = 15;
867 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
868 service->program = program;
876 static void enable_pcr_generation_for_stream(AVFormatContext *s, AVStream *pcr_st)
878 MpegTSWrite *ts = s->priv_data;
879 MpegTSWriteStream *ts_st = pcr_st->priv_data;
881 if (ts->mux_rate > 1 || ts->pcr_period_ms >= 0) {
882 int pcr_period_ms = ts->pcr_period_ms == -1 ? PCR_RETRANS_TIME : ts->pcr_period_ms;
883 ts_st->pcr_period = av_rescale(pcr_period_ms, PCR_TIME_BASE, 1000);
885 /* By default, for VBR we select the highest multiple of frame duration which is less than 100 ms. */
886 int64_t frame_period = 0;
887 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
888 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
890 av_log(s, AV_LOG_WARNING, "frame size not set\n");
893 frame_period = av_rescale_rnd(frame_size, PCR_TIME_BASE, pcr_st->codecpar->sample_rate, AV_ROUND_UP);
894 } else if (pcr_st->avg_frame_rate.num) {
895 frame_period = av_rescale_rnd(pcr_st->avg_frame_rate.den, PCR_TIME_BASE, pcr_st->avg_frame_rate.num, AV_ROUND_UP);
897 if (frame_period > 0 && frame_period <= PCR_TIME_BASE / 10)
898 ts_st->pcr_period = frame_period * (PCR_TIME_BASE / 10 / frame_period);
900 ts_st->pcr_period = 1;
903 // output a PCR as soon as possible
904 ts_st->last_pcr = ts->first_pcr - ts_st->pcr_period;
907 static void select_pcr_streams(AVFormatContext *s)
909 MpegTSWrite *ts = s->priv_data;
911 for (int i = 0; i < ts->nb_services; i++) {
912 MpegTSService *service = ts->services[i];
913 AVStream *pcr_st = NULL;
914 AVProgram *program = service->program;
915 int nb_streams = program ? program->nb_stream_indexes : s->nb_streams;
917 for (int j = 0; j < nb_streams; j++) {
918 AVStream *st = s->streams[program ? program->stream_index[j] : j];
920 pcr_st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
927 MpegTSWriteStream *ts_st = pcr_st->priv_data;
928 service->pcr_pid = ts_st->pid;
929 enable_pcr_generation_for_stream(s, pcr_st);
930 av_log(s, AV_LOG_VERBOSE, "service %i using PCR in pid=%i, pcr_period=%"PRId64"ms\n",
931 service->sid, service->pcr_pid, av_rescale(ts_st->pcr_period, 1000, PCR_TIME_BASE));
936 static int mpegts_init(AVFormatContext *s)
938 MpegTSWrite *ts = s->priv_data;
942 if (ts->m2ts_mode == -1) {
943 if (av_match_ext(s->url, "m2ts")) {
950 ts->m2ts_video_pid = M2TS_VIDEO_PID;
951 ts->m2ts_audio_pid = M2TS_AUDIO_START_PID;
952 ts->m2ts_pgssub_pid = M2TS_PGSSUB_START_PID;
953 ts->m2ts_textsub_pid = M2TS_TEXTSUB_PID;
956 ts->pmt_start_pid = M2TS_PMT_PID;
957 if (s->nb_programs > 1) {
958 av_log(s, AV_LOG_ERROR, "Only one program is allowed in m2ts mode!\n");
959 return AVERROR(EINVAL);
963 if (s->max_delay < 0) /* Not set by the caller */
966 // round up to a whole number of TS packets
967 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
969 if (!s->nb_programs) {
970 /* allocate a single DVB service */
971 if (!mpegts_add_service(s, ts->service_id, s->metadata, NULL))
972 return AVERROR(ENOMEM);
974 for (i = 0; i < s->nb_programs; i++) {
975 AVProgram *program = s->programs[i];
976 if (!mpegts_add_service(s, program->id, program->metadata, program))
977 return AVERROR(ENOMEM);
981 ts->pat.pid = PAT_PID;
982 /* Initialize at 15 so that it wraps and is equal to 0 for the
983 * first packet we write. */
985 ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
986 ts->pat.write_packet = section_write_packet;
989 ts->sdt.pid = SDT_PID;
991 ts->sdt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
992 ts->sdt.write_packet = section_write_packet;
995 /* assign pids to each stream */
996 for (i = 0; i < s->nb_streams; i++) {
997 AVStream *st = s->streams[i];
998 MpegTSWriteStream *ts_st;
1000 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
1002 return AVERROR(ENOMEM);
1004 st->priv_data = ts_st;
1006 avpriv_set_pts_info(st, 33, 1, 90000);
1008 ts_st->payload = av_mallocz(ts->pes_payload_size);
1009 if (!ts_st->payload) {
1010 return AVERROR(ENOMEM);
1013 /* MPEG pid values < 16 are reserved. Applications which set st->id in
1014 * this range are assigned a calculated pid. */
1016 if (ts->m2ts_mode) {
1017 switch (st->codecpar->codec_type) {
1018 case AVMEDIA_TYPE_VIDEO:
1019 ts_st->pid = ts->m2ts_video_pid++;
1021 case AVMEDIA_TYPE_AUDIO:
1022 ts_st->pid = ts->m2ts_audio_pid++;
1024 case AVMEDIA_TYPE_SUBTITLE:
1025 switch (st->codecpar->codec_id) {
1026 case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
1027 ts_st->pid = ts->m2ts_pgssub_pid++;
1029 case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
1030 ts_st->pid = ts->m2ts_textsub_pid++;
1035 if (ts->m2ts_video_pid > M2TS_VIDEO_PID + 1 ||
1036 ts->m2ts_audio_pid > M2TS_AUDIO_START_PID + 32 ||
1037 ts->m2ts_pgssub_pid > M2TS_PGSSUB_START_PID + 32 ||
1038 ts->m2ts_textsub_pid > M2TS_TEXTSUB_PID + 1 ||
1040 av_log(s, AV_LOG_ERROR, "Cannot automatically assign PID for stream %d\n", st->index);
1041 return AVERROR(EINVAL);
1044 ts_st->pid = ts->start_pid + i;
1047 ts_st->pid = st->id;
1049 if (ts_st->pid >= 0x1FFF) {
1050 av_log(s, AV_LOG_ERROR,
1051 "Invalid stream id %d, must be less than 8191\n", st->id);
1052 return AVERROR(EINVAL);
1054 for (j = 0; j < ts->nb_services; j++) {
1055 if (ts->services[j]->pmt.pid > LAST_OTHER_PID) {
1056 av_log(s, AV_LOG_ERROR,
1057 "Invalid PMT PID %d, must be less than %d\n", ts->services[j]->pmt.pid, LAST_OTHER_PID + 1);
1058 return AVERROR(EINVAL);
1060 if (ts_st->pid == ts->services[j]->pmt.pid) {
1061 av_log(s, AV_LOG_ERROR, "PID %d cannot be both elementary and PMT PID\n", ts_st->pid);
1062 return AVERROR(EINVAL);
1065 for (j = 0; j < i; j++) {
1066 MpegTSWriteStream *ts_st_prev = s->streams[j]->priv_data;
1067 if (ts_st_prev->pid == ts_st->pid) {
1068 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
1069 return AVERROR(EINVAL);
1072 ts_st->payload_pts = AV_NOPTS_VALUE;
1073 ts_st->payload_dts = AV_NOPTS_VALUE;
1074 ts_st->first_pts_check = 1;
1076 ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
1077 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1078 st->codecpar->extradata_size > 0) {
1080 ts_st->amux = avformat_alloc_context();
1082 return AVERROR(ENOMEM);
1084 ts_st->amux->oformat =
1085 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
1087 if (!ts_st->amux->oformat) {
1088 return AVERROR(EINVAL);
1090 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
1091 return AVERROR(ENOMEM);
1093 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
1096 ast->time_base = st->time_base;
1097 ret = avformat_write_header(ts_st->amux, NULL);
1101 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1102 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
1107 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
1109 select_pcr_streams(s);
1111 ts->last_pat_ts = AV_NOPTS_VALUE;
1112 ts->last_sdt_ts = AV_NOPTS_VALUE;
1113 ts->pat_period = av_rescale(ts->pat_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1114 ts->sdt_period = av_rescale(ts->sdt_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1116 if (ts->mux_rate == 1)
1117 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
1119 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
1120 av_log(s, AV_LOG_VERBOSE,
1121 "sdt every %"PRId64" ms, pat/pmt every %"PRId64" ms\n",
1122 av_rescale(ts->sdt_period, 1000, PCR_TIME_BASE),
1123 av_rescale(ts->pat_period, 1000, PCR_TIME_BASE));
1128 /* send SDT, PAT and PMT tables regularly */
1129 static void retransmit_si_info(AVFormatContext *s, int force_pat, int force_sdt, int64_t pcr)
1131 MpegTSWrite *ts = s->priv_data;
1134 if ((pcr != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1135 (pcr != AV_NOPTS_VALUE && pcr - ts->last_sdt_ts >= ts->sdt_period) ||
1138 if (pcr != AV_NOPTS_VALUE)
1139 ts->last_sdt_ts = FFMAX(pcr, ts->last_sdt_ts);
1140 mpegts_write_sdt(s);
1142 if ((pcr != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1143 (pcr != AV_NOPTS_VALUE && pcr - ts->last_pat_ts >= ts->pat_period) ||
1145 if (pcr != AV_NOPTS_VALUE)
1146 ts->last_pat_ts = FFMAX(pcr, ts->last_pat_ts);
1147 mpegts_write_pat(s);
1148 for (i = 0; i < ts->nb_services; i++)
1149 mpegts_write_pmt(s, ts->services[i]);
1153 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1155 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1157 *buf++ = pcr_high >> 25;
1158 *buf++ = pcr_high >> 17;
1159 *buf++ = pcr_high >> 9;
1160 *buf++ = pcr_high >> 1;
1161 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1167 /* Write a single null transport stream packet */
1168 static void mpegts_insert_null_packet(AVFormatContext *s)
1171 uint8_t buf[TS_PACKET_SIZE];
1178 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1179 write_packet(s, buf);
1182 /* Write a single transport stream packet with a PCR and no payload */
1183 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1185 MpegTSWrite *ts = s->priv_data;
1186 MpegTSWriteStream *ts_st = st->priv_data;
1188 uint8_t buf[TS_PACKET_SIZE];
1192 *q++ = ts_st->pid >> 8;
1194 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1195 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1196 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1197 *q++ = 0x10; /* Adaptation flags: PCR present */
1198 if (ts_st->discontinuity) {
1200 ts_st->discontinuity = 0;
1203 /* PCR coded into 6 bytes */
1204 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1206 /* stuffing bytes */
1207 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1208 write_packet(s, buf);
1211 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1215 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1217 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1220 val = (((pts) & 0x7fff) << 1) | 1;
1225 /* Set an adaptation field flag in an MPEG-TS packet*/
1226 static void set_af_flag(uint8_t *pkt, int flag)
1228 // expect at least one flag to set
1231 if ((pkt[3] & 0x20) == 0) {
1232 // no AF yet, set adaptation field flag
1234 // 1 byte length, no flags
1241 /* Extend the adaptation field by size bytes */
1242 static void extend_af(uint8_t *pkt, int size)
1244 // expect already existing adaptation field
1245 av_assert0(pkt[3] & 0x20);
1249 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
1250 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1253 return pkt + 5 + pkt[4];
1258 /* Add a PES header to the front of the payload, and segment into an integer
1259 * number of TS packets. The final TS packet is padded using an oversized
1260 * adaptation header to exactly fill the last TS packet.
1261 * NOTE: 'payload' contains a complete PES payload. */
1262 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1263 const uint8_t *payload, int payload_size,
1264 int64_t pts, int64_t dts, int key, int stream_id)
1266 MpegTSWriteStream *ts_st = st->priv_data;
1267 MpegTSWrite *ts = s->priv_data;
1268 uint8_t buf[TS_PACKET_SIZE];
1270 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1271 int afc_len, stuffing_len;
1272 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1273 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1276 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1277 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1281 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1284 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1288 while (payload_size > 0) {
1289 int64_t pcr = AV_NOPTS_VALUE;
1290 if (ts->mux_rate > 1)
1291 pcr = get_pcr(ts, s->pb);
1292 else if (dts != AV_NOPTS_VALUE)
1293 pcr = (dts - delay) * 300;
1295 retransmit_si_info(s, force_pat, force_sdt, pcr);
1300 if (ts->mux_rate > 1) {
1301 /* Send PCR packets for all PCR streams if needed */
1302 pcr = get_pcr(ts, s->pb);
1303 if (pcr >= ts->next_pcr) {
1304 int64_t next_pcr = INT64_MAX;
1305 for (int i = 0; i < s->nb_streams; i++) {
1306 /* Make the current stream the last, because for that we
1307 * can insert the pcr into the payload later */
1308 int st2_index = i < st->index ? i : (i + 1 == s->nb_streams ? st->index : i + 1);
1309 AVStream *st2 = s->streams[st2_index];
1310 MpegTSWriteStream *ts_st2 = st2->priv_data;
1311 if (ts_st2->pcr_period) {
1312 if (pcr - ts_st2->last_pcr >= ts_st2->pcr_period) {
1313 ts_st2->last_pcr = FFMAX(pcr - ts_st2->pcr_period, ts_st2->last_pcr + ts_st2->pcr_period);
1315 mpegts_insert_pcr_only(s, st2);
1316 pcr = get_pcr(ts, s->pb);
1321 next_pcr = FFMIN(next_pcr, ts_st2->last_pcr + ts_st2->pcr_period);
1324 ts->next_pcr = next_pcr;
1326 if (dts != AV_NOPTS_VALUE && (dts - pcr / 300) > delay) {
1327 /* pcr insert gets priority over null packet insert */
1329 mpegts_insert_pcr_only(s, st);
1331 mpegts_insert_null_packet(s);
1332 /* recalculate write_pcr and possibly retransmit si_info */
1335 } else if (ts_st->pcr_period && pcr != AV_NOPTS_VALUE) {
1336 if (pcr - ts_st->last_pcr >= ts_st->pcr_period && is_start) {
1337 ts_st->last_pcr = FFMAX(pcr - ts_st->pcr_period, ts_st->last_pcr + ts_st->pcr_period);
1342 /* prepare packet header */
1345 val = ts_st->pid >> 8;
1346 if (ts->m2ts_mode && st->codecpar->codec_id == AV_CODEC_ID_AC3)
1352 ts_st->cc = ts_st->cc + 1 & 0xf;
1353 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1354 if (ts_st->discontinuity) {
1355 set_af_flag(buf, 0x80);
1356 q = get_ts_payload_start(buf);
1357 ts_st->discontinuity = 0;
1359 if (key && is_start && pts != AV_NOPTS_VALUE) {
1360 // set Random Access for key frames
1361 if (ts_st->pcr_period)
1363 set_af_flag(buf, 0x40);
1364 q = get_ts_payload_start(buf);
1367 set_af_flag(buf, 0x10);
1368 q = get_ts_payload_start(buf);
1369 // add 11, pcr references the last byte of program clock reference base
1370 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1371 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1372 extend_af(buf, write_pcr_bits(q, pcr));
1373 q = get_ts_payload_start(buf);
1376 int pes_extension = 0;
1377 int pes_header_stuffing_bytes = 0;
1378 /* write PES header */
1382 is_dvb_subtitle = 0;
1383 is_dvb_teletext = 0;
1384 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1385 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1386 *q++ = STREAM_ID_EXTENDED_STREAM_ID;
1388 *q++ = STREAM_ID_VIDEO_STREAM_0;
1389 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1390 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1391 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1392 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1393 *q++ = STREAM_ID_AUDIO_STREAM_0;
1394 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1395 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1397 *q++ = STREAM_ID_EXTENDED_STREAM_ID;
1398 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
1399 st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
1400 *q++ = STREAM_ID_PRIVATE_STREAM_1;
1401 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1402 *q++ = stream_id != -1 ? stream_id : STREAM_ID_METADATA_STREAM;
1404 if (stream_id == STREAM_ID_PRIVATE_STREAM_1) /* asynchronous KLV */
1405 pts = dts = AV_NOPTS_VALUE;
1407 *q++ = STREAM_ID_PRIVATE_STREAM_1;
1408 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1409 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1410 is_dvb_subtitle = 1;
1411 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1412 is_dvb_teletext = 1;
1418 if (pts != AV_NOPTS_VALUE) {
1422 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1426 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1427 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1428 /* set PES_extension_flag */
1432 /* One byte for PES2 extension flag +
1433 * one byte for extension length +
1434 * one byte for extension id */
1437 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1438 * otherwise it will not play sound on blu-ray
1440 if (ts->m2ts_mode &&
1441 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1442 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1443 /* set PES_extension_flag */
1448 if (is_dvb_teletext) {
1449 pes_header_stuffing_bytes = 0x24 - header_len;
1452 len = payload_size + header_len + 3;
1453 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1454 if (is_dvb_subtitle) {
1460 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1466 /* data alignment indicator is required for subtitle and data streams */
1467 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1472 if (pts != AV_NOPTS_VALUE) {
1473 write_pts(q, flags >> 6, pts);
1476 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1477 write_pts(q, 1, dts);
1480 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1481 flags = 0x01; /* set PES_extension_flag_2 */
1483 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1484 /* Set the stream ID extension flag bit to 0 and
1485 * write the extended stream ID. */
1488 /* For Blu-ray AC3 Audio Setting extended flags */
1489 if (ts->m2ts_mode &&
1491 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1492 flags = 0x01; /* set PES_extension_flag_2 */
1494 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1495 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1499 if (is_dvb_subtitle) {
1500 /* First two fields of DVB subtitles PES data:
1501 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1502 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1506 if (is_dvb_teletext) {
1507 memset(q, 0xff, pes_header_stuffing_bytes);
1508 q += pes_header_stuffing_bytes;
1513 header_len = q - buf;
1515 len = TS_PACKET_SIZE - header_len;
1516 if (len > payload_size)
1518 stuffing_len = TS_PACKET_SIZE - header_len - len;
1519 if (stuffing_len > 0) {
1520 /* add stuffing with AFC */
1521 if (buf[3] & 0x20) {
1522 /* stuffing already present: increase its size */
1523 afc_len = buf[4] + 1;
1524 memmove(buf + 4 + afc_len + stuffing_len,
1526 header_len - (4 + afc_len));
1527 buf[4] += stuffing_len;
1528 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1531 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1533 buf[4] = stuffing_len - 1;
1534 if (stuffing_len >= 2) {
1536 memset(buf + 6, 0xff, stuffing_len - 2);
1541 if (is_dvb_subtitle && payload_size == len) {
1542 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1543 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1545 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1549 payload_size -= len;
1550 write_packet(s, buf);
1552 ts_st->prev_payload_key = key;
1555 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1557 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1558 if (!st->nb_frames) {
1559 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1560 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1561 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1562 return AVERROR_INVALIDDATA;
1564 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1566 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1567 av_log(s, AV_LOG_WARNING, "\n");
1572 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1574 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1575 if (!st->nb_frames) {
1576 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1577 return AVERROR_PATCHWELCOME;
1579 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1581 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1582 av_log(s, AV_LOG_WARNING, "\n");
1587 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1588 * Released under the LGPL v2.1+, written by
1589 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1591 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1593 static const int durations[32] = {
1594 480, 960, 1920, 2880, /* Silk NB */
1595 480, 960, 1920, 2880, /* Silk MB */
1596 480, 960, 1920, 2880, /* Silk WB */
1597 480, 960, /* Hybrid SWB */
1598 480, 960, /* Hybrid FB */
1599 120, 240, 480, 960, /* CELT NB */
1600 120, 240, 480, 960, /* CELT NB */
1601 120, 240, 480, 960, /* CELT NB */
1602 120, 240, 480, 960, /* CELT NB */
1604 int toc, frame_duration, nframes, duration;
1611 frame_duration = durations[toc >> 3];
1625 nframes = pkt->data[1] & 63;
1629 duration = nframes * frame_duration;
1630 if (duration > 5760) {
1631 av_log(s, AV_LOG_WARNING,
1632 "Opus packet duration > 120 ms, invalid");
1639 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1641 AVStream *st = s->streams[pkt->stream_index];
1642 int size = pkt->size;
1643 uint8_t *buf = pkt->data;
1644 uint8_t *data = NULL;
1645 MpegTSWrite *ts = s->priv_data;
1646 MpegTSWriteStream *ts_st = st->priv_data;
1647 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1648 const int64_t max_audio_delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) / 2;
1649 int64_t dts = pkt->dts, pts = pkt->pts;
1650 int opus_samples = 0;
1652 uint8_t *side_data = NULL;
1655 side_data = av_packet_get_side_data(pkt,
1656 AV_PKT_DATA_MPEGTS_STREAM_ID,
1659 stream_id = side_data[0];
1661 if (ts->copyts < 1) {
1662 if (pts != AV_NOPTS_VALUE)
1664 if (dts != AV_NOPTS_VALUE)
1668 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1669 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1670 return AVERROR_INVALIDDATA;
1672 ts_st->first_pts_check = 0;
1674 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1675 const uint8_t *p = buf, *buf_end = p + size;
1676 uint32_t state = -1;
1677 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1678 int ret = ff_check_h264_startcode(s, st, pkt);
1682 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1686 p = avpriv_find_start_code(p, buf_end, &state);
1687 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", state & 0x1f);
1688 if ((state & 0x1f) == 7)
1690 } while (p < buf_end && (state & 0x1f) != 9 &&
1691 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1693 if ((state & 0x1f) != 5)
1695 if ((state & 0x1f) != 9) { // AUD NAL
1696 data = av_malloc(pkt->size + 6 + extradd);
1698 return AVERROR(ENOMEM);
1699 memcpy(data + 6, st->codecpar->extradata, extradd);
1700 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1701 AV_WB32(data, 0x00000001);
1703 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1705 size = pkt->size + 6 + extradd;
1707 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1708 if (pkt->size < 2) {
1709 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1710 return AVERROR_INVALIDDATA;
1712 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1717 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1718 "and extradata missing\n");
1720 av_init_packet(&pkt2);
1721 pkt2.data = pkt->data;
1722 pkt2.size = pkt->size;
1723 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1724 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1726 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1730 ret = av_write_frame(ts_st->amux, &pkt2);
1732 ffio_free_dyn_buf(&ts_st->amux->pb);
1735 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1736 ts_st->amux->pb = NULL;
1740 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1741 const uint8_t *p = buf, *buf_end = p + size;
1742 uint32_t state = -1;
1743 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1744 int ret = check_hevc_startcode(s, st, pkt);
1748 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1752 p = avpriv_find_start_code(p, buf_end, &state);
1753 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", (state & 0x7e)>>1);
1754 if ((state & 0x7e) == 2*32)
1756 } while (p < buf_end && (state & 0x7e) != 2*35 &&
1757 (state & 0x7e) >= 2*32);
1759 if ((state & 0x7e) < 2*16 || (state & 0x7e) >= 2*24)
1761 if ((state & 0x7e) != 2*35) { // AUD NAL
1762 data = av_malloc(pkt->size + 7 + extradd);
1764 return AVERROR(ENOMEM);
1765 memcpy(data + 7, st->codecpar->extradata, extradd);
1766 memcpy(data + 7 + extradd, pkt->data, pkt->size);
1767 AV_WB32(data, 0x00000001);
1770 data[6] = 0x50; // any slice type (0x4) + rbsp stop one bit
1772 size = pkt->size + 7 + extradd;
1774 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1775 if (pkt->size < 2) {
1776 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1777 return AVERROR_INVALIDDATA;
1780 /* Add Opus control header */
1781 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1785 int ctrl_header_size;
1786 int trim_start = 0, trim_end = 0;
1788 opus_samples = opus_get_packet_samples(s, pkt);
1790 side_data = av_packet_get_side_data(pkt,
1791 AV_PKT_DATA_SKIP_SAMPLES,
1794 if (side_data && side_data_size >= 10) {
1795 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1798 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1799 if (ts_st->opus_pending_trim_start)
1800 ctrl_header_size += 2;
1802 ctrl_header_size += 2;
1804 data = av_malloc(ctrl_header_size);
1806 return AVERROR(ENOMEM);
1810 if (ts_st->opus_pending_trim_start)
1818 data[i] = FFMIN(n, 255);
1823 av_assert0(2 + pkt->size / 255 + 1 == i);
1825 if (ts_st->opus_pending_trim_start) {
1826 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1827 AV_WB16(data + i, trim_start);
1829 ts_st->opus_pending_trim_start -= trim_start;
1832 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1833 AV_WB16(data + i, trim_end);
1837 memcpy(data + i, pkt->data, pkt->size);
1839 size = ctrl_header_size;
1841 /* TODO: Can we get TS formatted data here? If so we will
1842 * need to count the samples of that too! */
1843 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1847 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1848 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1849 dts - ts_st->payload_dts >= max_audio_delay) ||
1850 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1851 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1852 ts_st->payload_pts, ts_st->payload_dts,
1853 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1854 ts_st->payload_size = 0;
1855 ts_st->opus_queued_samples = 0;
1858 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1859 av_assert0(!ts_st->payload_size);
1860 // for video and subtitle, write a single pes packet
1861 mpegts_write_pes(s, st, buf, size, pts, dts,
1862 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1863 ts_st->opus_queued_samples = 0;
1868 if (!ts_st->payload_size) {
1869 ts_st->payload_pts = pts;
1870 ts_st->payload_dts = dts;
1871 ts_st->payload_flags = pkt->flags;
1874 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1875 ts_st->payload_size += size;
1876 ts_st->opus_queued_samples += opus_samples;
1883 static void mpegts_write_flush(AVFormatContext *s)
1885 MpegTSWrite *ts = s->priv_data;
1888 /* flush current packets */
1889 for (i = 0; i < s->nb_streams; i++) {
1890 AVStream *st = s->streams[i];
1891 MpegTSWriteStream *ts_st = st->priv_data;
1892 if (ts_st->payload_size > 0) {
1893 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1894 ts_st->payload_pts, ts_st->payload_dts,
1895 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1896 ts_st->payload_size = 0;
1897 ts_st->opus_queued_samples = 0;
1901 if (ts->m2ts_mode) {
1902 int packets = (avio_tell(s->pb) / (TS_PACKET_SIZE + 4)) % 32;
1903 while (packets++ < 32)
1904 mpegts_insert_null_packet(s);
1908 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1911 mpegts_write_flush(s);
1914 return mpegts_write_packet_internal(s, pkt);
1918 static int mpegts_write_end(AVFormatContext *s)
1921 mpegts_write_flush(s);
1926 static void mpegts_deinit(AVFormatContext *s)
1928 MpegTSWrite *ts = s->priv_data;
1929 MpegTSService *service;
1932 for (i = 0; i < s->nb_streams; i++) {
1933 AVStream *st = s->streams[i];
1934 MpegTSWriteStream *ts_st = st->priv_data;
1936 av_freep(&ts_st->payload);
1938 avformat_free_context(ts_st->amux);
1944 for (i = 0; i < ts->nb_services; i++) {
1945 service = ts->services[i];
1948 av_freep(&ts->services);
1951 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1954 AVStream *st = s->streams[pkt->stream_index];
1956 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1957 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1958 (AV_RB24(pkt->data) != 0x000001 ||
1959 (st->codecpar->extradata_size > 0 &&
1960 st->codecpar->extradata[0] == 1)))
1961 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1962 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1963 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1964 (AV_RB24(pkt->data) != 0x000001 ||
1965 (st->codecpar->extradata_size > 0 &&
1966 st->codecpar->extradata[0] == 1)))
1967 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1973 #define OFFSET(x) offsetof(MpegTSWrite, x)
1974 #define ENC AV_OPT_FLAG_ENCODING_PARAM
1975 static const AVOption options[] = {
1976 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1977 OFFSET(transport_stream_id), AV_OPT_TYPE_INT, { .i64 = 0x0001 }, 0x0001, 0xffff, ENC },
1978 { "mpegts_original_network_id", "Set original_network_id field.",
1979 OFFSET(original_network_id), AV_OPT_TYPE_INT, { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, ENC },
1980 { "mpegts_service_id", "Set service_id field.",
1981 OFFSET(service_id), AV_OPT_TYPE_INT, { .i64 = 0x0001 }, 0x0001, 0xffff, ENC },
1982 { "mpegts_service_type", "Set service_type field.",
1983 OFFSET(service_type), AV_OPT_TYPE_INT, { .i64 = 0x01 }, 0x01, 0xff, ENC, "mpegts_service_type" },
1984 { "digital_tv", "Digital Television.",
1985 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff, ENC, "mpegts_service_type" },
1986 { "digital_radio", "Digital Radio.",
1987 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff, ENC, "mpegts_service_type" },
1988 { "teletext", "Teletext.",
1989 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff, ENC, "mpegts_service_type" },
1990 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1991 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff, ENC, "mpegts_service_type" },
1992 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1993 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
1994 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1995 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
1996 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1997 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
1998 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
1999 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2000 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
2001 OFFSET(pmt_start_pid), AV_OPT_TYPE_INT, { .i64 = 0x1000 }, FIRST_OTHER_PID, LAST_OTHER_PID, ENC },
2002 { "mpegts_start_pid", "Set the first pid.",
2003 OFFSET(start_pid), AV_OPT_TYPE_INT, { .i64 = 0x0100 }, FIRST_OTHER_PID, LAST_OTHER_PID, ENC },
2004 { "mpegts_m2ts_mode", "Enable m2ts mode.", OFFSET(m2ts_mode), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, ENC },
2005 { "muxrate", NULL, OFFSET(mux_rate), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
2006 { "pes_payload_size", "Minimum PES packet payload in bytes",
2007 OFFSET(pes_payload_size), AV_OPT_TYPE_INT, { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, ENC },
2008 { "mpegts_flags", "MPEG-TS muxing flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX, ENC, "mpegts_flags" },
2009 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
2010 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX, ENC, "mpegts_flags" },
2011 { "latm", "Use LATM packetization for AAC",
2012 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX, ENC, "mpegts_flags" },
2013 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
2014 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX, ENC, "mpegts_flags" },
2015 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
2016 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX, ENC, "mpegts_flags" },
2017 { "initial_discontinuity", "Mark initial packets as discontinuous",
2018 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX, ENC, "mpegts_flags" },
2019 { "mpegts_copyts", "don't offset dts/pts", OFFSET(copyts), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, ENC },
2020 { "tables_version", "set PAT, PMT and SDT version", OFFSET(tables_version), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 31, ENC },
2021 { "omit_video_pes_length", "Omit the PES packet length for video packets",
2022 OFFSET(omit_video_pes_length), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
2023 { "pcr_period", "PCR retransmission time in milliseconds",
2024 OFFSET(pcr_period_ms), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, ENC },
2025 { "pat_period", "PAT/PMT retransmission time limit in seconds",
2026 OFFSET(pat_period_us), AV_OPT_TYPE_DURATION, { .i64 = PAT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, ENC },
2027 { "sdt_period", "SDT retransmission time limit in seconds",
2028 OFFSET(sdt_period_us), AV_OPT_TYPE_DURATION, { .i64 = SDT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, ENC },
2032 static const AVClass mpegts_muxer_class = {
2033 .class_name = "MPEGTS muxer",
2034 .item_name = av_default_item_name,
2036 .version = LIBAVUTIL_VERSION_INT,
2039 AVOutputFormat ff_mpegts_muxer = {
2041 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2042 .mime_type = "video/MP2T",
2043 .extensions = "ts,m2t,m2ts,mts",
2044 .priv_data_size = sizeof(MpegTSWrite),
2045 .audio_codec = AV_CODEC_ID_MP2,
2046 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
2047 .init = mpegts_init,
2048 .write_packet = mpegts_write_packet,
2049 .write_trailer = mpegts_write_end,
2050 .deinit = mpegts_deinit,
2051 .check_bitstream = mpegts_check_bitstream,
2052 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS | AVFMT_NODIMENSIONS,
2053 .priv_class = &mpegts_muxer_class,