2 * MPEG2 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 /*********************************************/
42 /* mpegts section writer */
44 typedef struct MpegTSSection {
47 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
51 typedef struct MpegTSService {
52 MpegTSSection pmt; /* MPEG2 pmt table context */
53 int sid; /* service ID */
58 int pcr_packet_period;
61 // service_type values as defined in ETSI 300 468
63 MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
64 MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
65 MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
66 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
67 MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
68 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
69 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19
71 typedef struct MpegTSWrite {
72 const AVClass *av_class;
73 MpegTSSection pat; /* MPEG2 pat table */
74 MpegTSSection sdt; /* MPEG2 sdt table context */
75 MpegTSService **services;
77 int sdt_packet_period;
79 int pat_packet_period;
84 int mux_rate; ///< set to 1 when VBR
87 int transport_stream_id;
88 int original_network_id;
96 int reemit_pat_pmt; // backward compatibility
99 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
100 #define MPEGTS_FLAG_AAC_LATM 0x02
101 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
106 int omit_video_pes_length;
109 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
110 #define DEFAULT_PES_HEADER_FREQ 16
111 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
113 /* The section length is 12 bits. The first 2 are set to 0, the remaining
114 * 10 bits should not exceed 1021. */
115 #define SECTION_LENGTH 1020
117 /* NOTE: 4 bytes must be left at the end for the crc32 */
118 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
121 unsigned char packet[TS_PACKET_SIZE];
122 const unsigned char *buf_ptr;
124 int first, b, len1, left;
126 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
129 buf[len - 4] = (crc >> 24) & 0xff;
130 buf[len - 3] = (crc >> 16) & 0xff;
131 buf[len - 2] = (crc >> 8) & 0xff;
132 buf[len - 1] = crc & 0xff;
134 /* send each packet */
137 first = buf == buf_ptr;
145 s->cc = s->cc + 1 & 0xf;
148 *q++ = 0; /* 0 offset */
149 len1 = TS_PACKET_SIZE - (q - packet);
152 memcpy(q, buf_ptr, len1);
154 /* add known padding data */
155 left = TS_PACKET_SIZE - (q - packet);
157 memset(q, 0xff, left);
159 s->write_packet(s, packet);
166 static inline void put16(uint8_t **q_ptr, int val)
175 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
176 int version, int sec_num, int last_sec_num,
177 uint8_t *buf, int len)
179 uint8_t section[1024], *q;
180 unsigned int tot_len;
181 /* reserved_future_use field must be set to 1 for SDT */
182 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
184 tot_len = 3 + 5 + len + 4;
185 /* check if not too big */
187 return AVERROR_INVALIDDATA;
191 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
193 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
198 mpegts_write_section(s, section, tot_len);
202 /*********************************************/
205 #define DEFAULT_PROVIDER_NAME "FFmpeg"
206 #define DEFAULT_SERVICE_NAME "Service01"
208 /* we retransmit the SI info at this rate */
209 #define SDT_RETRANS_TIME 500
210 #define PAT_RETRANS_TIME 100
211 #define PCR_RETRANS_TIME 20
213 typedef struct MpegTSWriteStream {
214 struct MpegTSService *service;
215 int pid; /* stream associated pid */
218 int first_pts_check; ///< first pts check needed
219 int prev_payload_key;
224 AVFormatContext *amux;
228 static void mpegts_write_pat(AVFormatContext *s)
230 MpegTSWrite *ts = s->priv_data;
231 MpegTSService *service;
232 uint8_t data[SECTION_LENGTH], *q;
236 for (i = 0; i < ts->nb_services; i++) {
237 service = ts->services[i];
238 put16(&q, service->sid);
239 put16(&q, 0xe000 | service->pmt.pid);
241 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
245 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
247 MpegTSWrite *ts = s->priv_data;
248 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
249 int val, stream_type, i, err = 0;
252 put16(&q, 0xe000 | service->pcr_pid);
254 program_info_length_ptr = q;
255 q += 2; /* patched after */
257 /* put program info here */
259 val = 0xf000 | (q - program_info_length_ptr - 2);
260 program_info_length_ptr[0] = val >> 8;
261 program_info_length_ptr[1] = val;
263 for (i = 0; i < s->nb_streams; i++) {
264 AVStream *st = s->streams[i];
265 MpegTSWriteStream *ts_st = st->priv_data;
266 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
268 if (q - data > SECTION_LENGTH - 32) {
272 switch (st->codec->codec_id) {
273 case AV_CODEC_ID_MPEG1VIDEO:
274 case AV_CODEC_ID_MPEG2VIDEO:
275 stream_type = STREAM_TYPE_VIDEO_MPEG2;
277 case AV_CODEC_ID_MPEG4:
278 stream_type = STREAM_TYPE_VIDEO_MPEG4;
280 case AV_CODEC_ID_H264:
281 stream_type = STREAM_TYPE_VIDEO_H264;
283 case AV_CODEC_ID_HEVC:
284 stream_type = STREAM_TYPE_VIDEO_HEVC;
286 case AV_CODEC_ID_CAVS:
287 stream_type = STREAM_TYPE_VIDEO_CAVS;
289 case AV_CODEC_ID_DIRAC:
290 stream_type = STREAM_TYPE_VIDEO_DIRAC;
292 case AV_CODEC_ID_MP2:
293 case AV_CODEC_ID_MP3:
294 stream_type = STREAM_TYPE_AUDIO_MPEG1;
296 case AV_CODEC_ID_AAC:
297 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
298 ? STREAM_TYPE_AUDIO_AAC_LATM
299 : STREAM_TYPE_AUDIO_AAC;
301 case AV_CODEC_ID_AAC_LATM:
302 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
304 case AV_CODEC_ID_AC3:
305 stream_type = STREAM_TYPE_AUDIO_AC3;
307 case AV_CODEC_ID_DTS:
308 stream_type = STREAM_TYPE_AUDIO_DTS;
310 case AV_CODEC_ID_TRUEHD:
311 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
314 stream_type = STREAM_TYPE_PRIVATE_DATA;
319 put16(&q, 0xe000 | ts_st->pid);
321 q += 2; /* patched after */
323 /* write optional descriptors here */
324 switch (st->codec->codec_type) {
325 case AVMEDIA_TYPE_AUDIO:
326 if (st->codec->codec_id==AV_CODEC_ID_EAC3) {
327 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
328 *q++=1; // 1 byte, all flags sets to 0
329 *q++=0; // omit all fields...
331 if (st->codec->codec_id==AV_CODEC_ID_S302M) {
332 *q++ = 0x05; /* MPEG-2 registration descriptor*/
342 char *next = lang->value;
345 *q++ = 0x0a; /* ISO 639 language descriptor */
349 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
350 if (q - data > SECTION_LENGTH - 4) {
354 next = strchr(p, ',');
355 if (strlen(p) != 3 && (!next || next != p + 3))
356 continue; /* not a 3-letter code */
362 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
364 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
366 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
369 *q++ = 0; /* undefined type */
375 q -= 2; /* no language codes were written */
378 case AVMEDIA_TYPE_SUBTITLE:
380 const char default_language[] = "und";
381 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
383 if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
385 int extradata_copied = 0;
387 *q++ = 0x59; /* subtitling_descriptor */
390 while (strlen(language) >= 3) {
391 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
399 if (*language != '\0')
402 if (st->codec->extradata_size - extradata_copied >= 5) {
403 *q++ = st->codec->extradata[extradata_copied + 4]; /* subtitling_type */
404 memcpy(q, st->codec->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
405 extradata_copied += 5;
409 * 0x10 - normal with no monitor aspect ratio criticality
410 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
411 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
412 if ((st->codec->extradata_size == 4) && (extradata_copied == 0)) {
413 /* support of old 4-byte extradata format */
414 memcpy(q, st->codec->extradata, 4); /* composition_page_id and ancillary_page_id */
415 extradata_copied += 4;
418 put16(&q, 1); /* composition_page_id */
419 put16(&q, 1); /* ancillary_page_id */
424 *len_ptr = q - len_ptr - 1;
425 } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
426 uint8_t *len_ptr = NULL;
427 int extradata_copied = 0;
429 /* The descriptor tag. teletext_descriptor */
433 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
438 if (*language != '\0')
441 if (st->codec->extradata_size - 1 > extradata_copied) {
442 memcpy(q, st->codec->extradata + extradata_copied, 2);
443 extradata_copied += 2;
446 /* The Teletext descriptor:
447 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
448 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
449 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
455 *len_ptr = q - len_ptr - 1;
459 case AVMEDIA_TYPE_VIDEO:
460 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
461 *q++ = 0x05; /*MPEG-2 registration descriptor*/
469 case AVMEDIA_TYPE_DATA:
470 if (st->codec->codec_id == AV_CODEC_ID_SMPTE_KLV) {
471 *q++ = 0x05; /* MPEG-2 registration descriptor */
481 val = 0xf000 | (q - desc_length_ptr - 2);
482 desc_length_ptr[0] = val >> 8;
483 desc_length_ptr[1] = val;
487 av_log(s, AV_LOG_ERROR,
488 "The PMT section cannot fit stream %d and all following streams.\n"
489 "Try reducing the number of languages in the audio streams "
490 "or the total number of streams.\n", i);
492 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
497 /* NOTE: !str is accepted for an empty string */
498 static void putstr8(uint8_t **q_ptr, const char *str)
514 static void mpegts_write_sdt(AVFormatContext *s)
516 MpegTSWrite *ts = s->priv_data;
517 MpegTSService *service;
518 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
519 int i, running_status, free_ca_mode, val;
524 for (i = 0; i < ts->nb_services; i++) {
525 service = ts->services[i];
526 put16(&q, service->sid);
527 *q++ = 0xfc | 0x00; /* currently no EIT info */
528 desc_list_len_ptr = q;
530 running_status = 4; /* running */
533 /* write only one descriptor for the service name and provider */
537 *q++ = ts->service_type;
538 putstr8(&q, service->provider_name);
539 putstr8(&q, service->name);
540 desc_len_ptr[0] = q - desc_len_ptr - 1;
542 /* fill descriptor length */
543 val = (running_status << 13) | (free_ca_mode << 12) |
544 (q - desc_list_len_ptr - 2);
545 desc_list_len_ptr[0] = val >> 8;
546 desc_list_len_ptr[1] = val;
548 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
552 static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
553 const char *provider_name,
556 MpegTSService *service;
558 service = av_mallocz(sizeof(MpegTSService));
561 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
563 service->pcr_pid = 0x1fff;
564 service->provider_name = av_strdup(provider_name);
565 service->name = av_strdup(name);
566 if (!service->provider_name || !service->name)
568 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
573 av_freep(&service->provider_name);
574 av_freep(&service->name);
579 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
581 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
585 static void mpegts_prefix_m2ts_header(AVFormatContext *s)
587 MpegTSWrite *ts = s->priv_data;
589 int64_t pcr = get_pcr(s->priv_data, s->pb);
590 uint32_t tp_extra_header = pcr % 0x3fffffff;
591 tp_extra_header = AV_RB32(&tp_extra_header);
592 avio_write(s->pb, (unsigned char *) &tp_extra_header,
593 sizeof(tp_extra_header));
597 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
599 AVFormatContext *ctx = s->opaque;
600 mpegts_prefix_m2ts_header(ctx);
601 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
604 static int mpegts_write_header(AVFormatContext *s)
606 MpegTSWrite *ts = s->priv_data;
607 MpegTSWriteStream *ts_st;
608 MpegTSService *service;
609 AVStream *st, *pcr_st = NULL;
610 AVDictionaryEntry *title, *provider;
612 const char *service_name;
613 const char *provider_name;
617 if (s->max_delay < 0) /* Not set by the caller */
620 // round up to a whole number of TS packets
621 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
623 ts->tsid = ts->transport_stream_id;
624 ts->onid = ts->original_network_id;
625 /* allocate a single DVB service */
626 title = av_dict_get(s->metadata, "service_name", NULL, 0);
628 title = av_dict_get(s->metadata, "title", NULL, 0);
629 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
630 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
631 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
632 service = mpegts_add_service(ts, ts->service_id,
633 provider_name, service_name);
636 return AVERROR(ENOMEM);
638 service->pmt.write_packet = section_write_packet;
639 service->pmt.opaque = s;
640 service->pmt.cc = 15;
642 ts->pat.pid = PAT_PID;
643 /* Initialize at 15 so that it wraps and is equal to 0 for the
644 * first packet we write. */
646 ts->pat.write_packet = section_write_packet;
649 ts->sdt.pid = SDT_PID;
651 ts->sdt.write_packet = section_write_packet;
654 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
656 ret = AVERROR(ENOMEM);
660 /* assign pids to each stream */
661 for (i = 0; i < s->nb_streams; i++) {
664 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
666 ret = AVERROR(ENOMEM);
669 st->priv_data = ts_st;
671 ts_st->user_tb = st->time_base;
672 avpriv_set_pts_info(st, 33, 1, 90000);
674 ts_st->payload = av_mallocz(ts->pes_payload_size);
675 if (!ts_st->payload) {
676 ret = AVERROR(ENOMEM);
679 ts_st->service = service;
680 /* MPEG pid values < 16 are reserved. Applications which set st->id in
681 * this range are assigned a calculated pid. */
683 ts_st->pid = ts->start_pid + i;
684 } else if (st->id < 0x1FFF) {
687 av_log(s, AV_LOG_ERROR,
688 "Invalid stream id %d, must be less than 8191\n", st->id);
689 ret = AVERROR(EINVAL);
692 if (ts_st->pid == service->pmt.pid) {
693 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
694 ret = AVERROR(EINVAL);
697 for (j = 0; j < i; j++) {
698 if (pids[j] == ts_st->pid) {
699 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
700 ret = AVERROR(EINVAL);
704 pids[i] = ts_st->pid;
705 ts_st->payload_pts = AV_NOPTS_VALUE;
706 ts_st->payload_dts = AV_NOPTS_VALUE;
707 ts_st->first_pts_check = 1;
709 /* update PCR pid by using the first video stream */
710 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
711 service->pcr_pid == 0x1fff) {
712 service->pcr_pid = ts_st->pid;
715 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
716 st->codec->extradata_size > 0) {
718 ts_st->amux = avformat_alloc_context();
720 ret = AVERROR(ENOMEM);
723 ts_st->amux->oformat =
724 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
726 if (!ts_st->amux->oformat) {
727 ret = AVERROR(EINVAL);
730 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
731 ret = AVERROR(ENOMEM);
734 ret = avcodec_copy_context(ast->codec, st->codec);
737 ast->time_base = st->time_base;
738 ret = avformat_write_header(ts_st->amux, NULL);
746 /* if no video stream, use the first stream as PCR */
747 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
748 pcr_st = s->streams[0];
749 ts_st = pcr_st->priv_data;
750 service->pcr_pid = ts_st->pid;
752 ts_st = pcr_st->priv_data;
754 if (ts->mux_rate > 1) {
755 service->pcr_packet_period = (ts->mux_rate * ts->pcr_period) /
756 (TS_PACKET_SIZE * 8 * 1000);
757 ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /
758 (TS_PACKET_SIZE * 8 * 1000);
759 ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /
760 (TS_PACKET_SIZE * 8 * 1000);
763 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
765 /* Arbitrary values, PAT/PMT will also be written on video key frames */
766 ts->sdt_packet_period = 200;
767 ts->pat_packet_period = 40;
768 if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
769 if (!pcr_st->codec->frame_size) {
770 av_log(s, AV_LOG_WARNING, "frame size not set\n");
771 service->pcr_packet_period =
772 pcr_st->codec->sample_rate / (10 * 512);
774 service->pcr_packet_period =
775 pcr_st->codec->sample_rate / (10 * pcr_st->codec->frame_size);
778 // max delta PCR 0.1s
779 // TODO: should be avg_frame_rate
780 service->pcr_packet_period =
781 ts_st->user_tb.den / (10 * ts_st->user_tb.num);
783 if (!service->pcr_packet_period)
784 service->pcr_packet_period = 1;
787 // output a PCR as soon as possible
788 service->pcr_packet_count = service->pcr_packet_period;
789 ts->pat_packet_count = ts->pat_packet_period - 1;
790 ts->sdt_packet_count = ts->sdt_packet_period - 1;
792 if (ts->mux_rate == 1)
793 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
795 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
796 av_log(s, AV_LOG_VERBOSE,
797 "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
798 service->pcr_packet_period,
799 ts->sdt_packet_period, ts->pat_packet_period);
801 if (ts->m2ts_mode == -1) {
802 if (av_match_ext(s->filename, "m2ts")) {
813 for (i = 0; i < s->nb_streams; i++) {
815 ts_st = st->priv_data;
817 av_freep(&ts_st->payload);
819 avformat_free_context(ts_st->amux);
823 av_freep(&st->priv_data);
826 for (i = 0; i < ts->nb_services; i++) {
827 service = ts->services[i];
828 av_freep(&service->provider_name);
829 av_freep(&service->name);
832 av_freep(&ts->services);
836 /* send SDT, PAT and PMT tables regulary */
837 static void retransmit_si_info(AVFormatContext *s, int force_pat)
839 MpegTSWrite *ts = s->priv_data;
842 if (++ts->sdt_packet_count == ts->sdt_packet_period) {
843 ts->sdt_packet_count = 0;
846 if (++ts->pat_packet_count == ts->pat_packet_period || force_pat) {
847 ts->pat_packet_count = 0;
849 for (i = 0; i < ts->nb_services; i++)
850 mpegts_write_pmt(s, ts->services[i]);
854 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
856 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
858 *buf++ = pcr_high >> 25;
859 *buf++ = pcr_high >> 17;
860 *buf++ = pcr_high >> 9;
861 *buf++ = pcr_high >> 1;
862 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
868 /* Write a single null transport stream packet */
869 static void mpegts_insert_null_packet(AVFormatContext *s)
872 uint8_t buf[TS_PACKET_SIZE];
879 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
880 mpegts_prefix_m2ts_header(s);
881 avio_write(s->pb, buf, TS_PACKET_SIZE);
884 /* Write a single transport stream packet with a PCR and no payload */
885 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
887 MpegTSWrite *ts = s->priv_data;
888 MpegTSWriteStream *ts_st = st->priv_data;
890 uint8_t buf[TS_PACKET_SIZE];
894 *q++ = ts_st->pid >> 8;
896 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
897 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
898 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
899 *q++ = 0x10; /* Adaptation flags: PCR present */
901 /* PCR coded into 6 bytes */
902 q += write_pcr_bits(q, get_pcr(ts, s->pb));
905 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
906 mpegts_prefix_m2ts_header(s);
907 avio_write(s->pb, buf, TS_PACKET_SIZE);
910 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
914 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
916 val = (((pts >> 15) & 0x7fff) << 1) | 1;
919 val = (((pts) & 0x7fff) << 1) | 1;
924 /* Set an adaptation field flag in an MPEG-TS packet*/
925 static void set_af_flag(uint8_t *pkt, int flag)
927 // expect at least one flag to set
930 if ((pkt[3] & 0x20) == 0) {
931 // no AF yet, set adaptation field flag
933 // 1 byte length, no flags
940 /* Extend the adaptation field by size bytes */
941 static void extend_af(uint8_t *pkt, int size)
943 // expect already existing adaptation field
944 av_assert0(pkt[3] & 0x20);
948 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
949 static uint8_t *get_ts_payload_start(uint8_t *pkt)
952 return pkt + 5 + pkt[4];
957 /* Add a PES header to the front of the payload, and segment into an integer
958 * number of TS packets. The final TS packet is padded using an oversized
959 * adaptation header to exactly fill the last TS packet.
960 * NOTE: 'payload' contains a complete PES payload. */
961 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
962 const uint8_t *payload, int payload_size,
963 int64_t pts, int64_t dts, int key)
965 MpegTSWriteStream *ts_st = st->priv_data;
966 MpegTSWrite *ts = s->priv_data;
967 uint8_t buf[TS_PACKET_SIZE];
969 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
970 int afc_len, stuffing_len;
971 int64_t pcr = -1; /* avoid warning */
972 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
973 int force_pat = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
975 av_assert0(ts_st->payload != buf || st->codec->codec_type != AVMEDIA_TYPE_VIDEO);
976 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
981 while (payload_size > 0) {
982 retransmit_si_info(s, force_pat);
986 if (ts_st->pid == ts_st->service->pcr_pid) {
987 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
988 ts_st->service->pcr_packet_count++;
989 if (ts_st->service->pcr_packet_count >=
990 ts_st->service->pcr_packet_period) {
991 ts_st->service->pcr_packet_count = 0;
996 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
997 (dts - get_pcr(ts, s->pb) / 300) > delay) {
998 /* pcr insert gets priority over null packet insert */
1000 mpegts_insert_pcr_only(s, st);
1002 mpegts_insert_null_packet(s);
1003 /* recalculate write_pcr and possibly retransmit si_info */
1007 /* prepare packet header */
1010 val = ts_st->pid >> 8;
1015 ts_st->cc = ts_st->cc + 1 & 0xf;
1016 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1017 if (key && is_start && pts != AV_NOPTS_VALUE) {
1018 // set Random Access for key frames
1019 if (ts_st->pid == ts_st->service->pcr_pid)
1021 set_af_flag(buf, 0x40);
1022 q = get_ts_payload_start(buf);
1025 set_af_flag(buf, 0x10);
1026 q = get_ts_payload_start(buf);
1027 // add 11, pcr references the last byte of program clock reference base
1028 if (ts->mux_rate > 1)
1029 pcr = get_pcr(ts, s->pb);
1031 pcr = (dts - delay) * 300;
1032 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1033 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1034 extend_af(buf, write_pcr_bits(q, pcr));
1035 q = get_ts_payload_start(buf);
1038 int pes_extension = 0;
1039 int pes_header_stuffing_bytes = 0;
1040 /* write PES header */
1044 is_dvb_subtitle = 0;
1045 is_dvb_teletext = 0;
1046 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1047 if (st->codec->codec_id == AV_CODEC_ID_DIRAC)
1051 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1052 (st->codec->codec_id == AV_CODEC_ID_MP2 ||
1053 st->codec->codec_id == AV_CODEC_ID_MP3 ||
1054 st->codec->codec_id == AV_CODEC_ID_AAC)) {
1056 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1057 st->codec->codec_id == AV_CODEC_ID_AC3 &&
1062 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1063 if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1064 is_dvb_subtitle = 1;
1065 } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1066 is_dvb_teletext = 1;
1072 if (pts != AV_NOPTS_VALUE) {
1076 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1080 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1081 st->codec->codec_id == AV_CODEC_ID_DIRAC) {
1082 /* set PES_extension_flag */
1086 /* One byte for PES2 extension flag +
1087 * one byte for extension length +
1088 * one byte for extension id */
1091 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1092 * otherwise it will not play sound on blu-ray
1094 if (ts->m2ts_mode &&
1095 st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1096 st->codec->codec_id == AV_CODEC_ID_AC3) {
1097 /* set PES_extension_flag */
1102 if (is_dvb_teletext) {
1103 pes_header_stuffing_bytes = 0x24 - header_len;
1106 len = payload_size + header_len + 3;
1107 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1108 if (is_dvb_subtitle) {
1114 if (ts->omit_video_pes_length && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1120 /* data alignment indicator is required for subtitle and data streams */
1121 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA)
1126 if (pts != AV_NOPTS_VALUE) {
1127 write_pts(q, flags >> 6, pts);
1130 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1131 write_pts(q, 1, dts);
1134 if (pes_extension && st->codec->codec_id == AV_CODEC_ID_DIRAC) {
1135 flags = 0x01; /* set PES_extension_flag_2 */
1137 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1138 /* Set the stream ID extension flag bit to 0 and
1139 * write the extended stream ID. */
1142 /* For Blu-ray AC3 Audio Setting extended flags */
1143 if (ts->m2ts_mode &&
1145 st->codec->codec_id == AV_CODEC_ID_AC3) {
1146 flags = 0x01; /* set PES_extension_flag_2 */
1148 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1149 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1153 if (is_dvb_subtitle) {
1154 /* First two fields of DVB subtitles PES data:
1155 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1156 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1160 if (is_dvb_teletext) {
1161 memset(q, 0xff, pes_header_stuffing_bytes);
1162 q += pes_header_stuffing_bytes;
1167 header_len = q - buf;
1169 len = TS_PACKET_SIZE - header_len;
1170 if (len > payload_size)
1172 stuffing_len = TS_PACKET_SIZE - header_len - len;
1173 if (stuffing_len > 0) {
1174 /* add stuffing with AFC */
1175 if (buf[3] & 0x20) {
1176 /* stuffing already present: increase its size */
1177 afc_len = buf[4] + 1;
1178 memmove(buf + 4 + afc_len + stuffing_len,
1180 header_len - (4 + afc_len));
1181 buf[4] += stuffing_len;
1182 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1185 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1187 buf[4] = stuffing_len - 1;
1188 if (stuffing_len >= 2) {
1190 memset(buf + 6, 0xff, stuffing_len - 2);
1195 if (is_dvb_subtitle && payload_size == len) {
1196 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1197 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1199 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1203 payload_size -= len;
1204 mpegts_prefix_m2ts_header(s);
1205 avio_write(s->pb, buf, TS_PACKET_SIZE);
1207 ts_st->prev_payload_key = key;
1210 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1212 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1213 if (!st->nb_frames) {
1214 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1215 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1216 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1217 return AVERROR_INVALIDDATA;
1219 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1220 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1221 av_log(s, AV_LOG_WARNING, "\n");
1226 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1228 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1229 if (!st->nb_frames) {
1230 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1231 return AVERROR_PATCHWELCOME;
1233 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1234 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1235 av_log(s, AV_LOG_WARNING, "\n");
1240 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1242 AVStream *st = s->streams[pkt->stream_index];
1243 int size = pkt->size;
1244 uint8_t *buf = pkt->data;
1245 uint8_t *data = NULL;
1246 MpegTSWrite *ts = s->priv_data;
1247 MpegTSWriteStream *ts_st = st->priv_data;
1248 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1249 int64_t dts = pkt->dts, pts = pkt->pts;
1251 if (ts->reemit_pat_pmt) {
1252 av_log(s, AV_LOG_WARNING,
1253 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1254 ts->reemit_pat_pmt = 0;
1255 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1258 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1259 ts->pat_packet_count = ts->pat_packet_period - 1;
1260 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1261 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1264 if (ts->copyts < 1) {
1265 if (pts != AV_NOPTS_VALUE)
1267 if (dts != AV_NOPTS_VALUE)
1271 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1272 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1273 return AVERROR_INVALIDDATA;
1275 ts_st->first_pts_check = 0;
1277 if (st->codec->codec_id == AV_CODEC_ID_H264) {
1278 const uint8_t *p = buf, *buf_end = p + size;
1279 uint32_t state = -1;
1280 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codec->extradata_size : 0;
1281 int ret = ff_check_h264_startcode(s, st, pkt);
1285 if (extradd && AV_RB24(st->codec->extradata) > 1)
1289 p = avpriv_find_start_code(p, buf_end, &state);
1290 av_log(s, AV_LOG_TRACE, "nal %d\n", state & 0x1f);
1291 if ((state & 0x1f) == 7)
1293 } while (p < buf_end && (state & 0x1f) != 9 &&
1294 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1296 if ((state & 0x1f) != 5)
1298 if ((state & 0x1f) != 9) { // AUD NAL
1299 data = av_malloc(pkt->size + 6 + extradd);
1301 return AVERROR(ENOMEM);
1302 memcpy(data + 6, st->codec->extradata, extradd);
1303 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1304 AV_WB32(data, 0x00000001);
1306 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1308 size = pkt->size + 6 + extradd;
1310 } else if (st->codec->codec_id == AV_CODEC_ID_AAC) {
1311 if (pkt->size < 2) {
1312 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1313 return AVERROR_INVALIDDATA;
1315 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1320 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1321 "and extradata missing\n");
1323 return AVERROR_INVALIDDATA;
1325 av_init_packet(&pkt2);
1326 pkt2.data = pkt->data;
1327 pkt2.size = pkt->size;
1328 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1329 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1331 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1333 return AVERROR(ENOMEM);
1335 ret = av_write_frame(ts_st->amux, &pkt2);
1337 ffio_free_dyn_buf(&ts_st->amux->pb);
1340 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1341 ts_st->amux->pb = NULL;
1345 } else if (st->codec->codec_id == AV_CODEC_ID_HEVC) {
1346 int ret = check_hevc_startcode(s, st, pkt);
1351 if (pkt->dts != AV_NOPTS_VALUE) {
1353 for(i=0; i<s->nb_streams; i++) {
1354 AVStream *st2 = s->streams[i];
1355 MpegTSWriteStream *ts_st2 = st2->priv_data;
1356 if ( ts_st2->payload_size
1357 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1358 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1359 ts_st2->payload_pts, ts_st2->payload_dts,
1360 ts_st2->payload_flags & AV_PKT_FLAG_KEY);
1361 ts_st2->payload_size = 0;
1366 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1367 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1368 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1369 s->max_delay, AV_TIME_BASE_Q) >= 0))) {
1370 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1371 ts_st->payload_pts, ts_st->payload_dts,
1372 ts_st->payload_flags & AV_PKT_FLAG_KEY);
1373 ts_st->payload_size = 0;
1376 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1377 av_assert0(!ts_st->payload_size);
1378 // for video and subtitle, write a single pes packet
1379 mpegts_write_pes(s, st, buf, size, pts, dts,
1380 pkt->flags & AV_PKT_FLAG_KEY);
1385 if (!ts_st->payload_size) {
1386 ts_st->payload_pts = pts;
1387 ts_st->payload_dts = dts;
1388 ts_st->payload_flags = pkt->flags;
1391 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1392 ts_st->payload_size += size;
1399 static void mpegts_write_flush(AVFormatContext *s)
1403 /* flush current packets */
1404 for (i = 0; i < s->nb_streams; i++) {
1405 AVStream *st = s->streams[i];
1406 MpegTSWriteStream *ts_st = st->priv_data;
1407 if (ts_st->payload_size > 0) {
1408 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1409 ts_st->payload_pts, ts_st->payload_dts,
1410 ts_st->payload_flags & AV_PKT_FLAG_KEY);
1411 ts_st->payload_size = 0;
1416 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1419 mpegts_write_flush(s);
1422 return mpegts_write_packet_internal(s, pkt);
1426 static int mpegts_write_end(AVFormatContext *s)
1428 MpegTSWrite *ts = s->priv_data;
1429 MpegTSService *service;
1433 mpegts_write_flush(s);
1435 for (i = 0; i < s->nb_streams; i++) {
1436 AVStream *st = s->streams[i];
1437 MpegTSWriteStream *ts_st = st->priv_data;
1438 av_freep(&ts_st->payload);
1440 avformat_free_context(ts_st->amux);
1445 for (i = 0; i < ts->nb_services; i++) {
1446 service = ts->services[i];
1447 av_freep(&service->provider_name);
1448 av_freep(&service->name);
1451 av_freep(&ts->services);
1456 static const AVOption options[] = {
1457 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1458 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1459 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1460 { "mpegts_original_network_id", "Set original_network_id field.",
1461 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1462 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1463 { "mpegts_service_id", "Set service_id field.",
1464 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1465 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1466 { "mpegts_service_type", "Set service_type field.",
1467 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1468 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1469 { "digital_tv", "Digital Television.",
1470 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1471 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1472 { "digital_radio", "Digital Radio.",
1473 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1474 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1475 { "teletext", "Teletext.",
1476 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1477 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1478 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1479 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1480 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1481 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1482 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1483 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1484 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1485 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1486 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1487 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1488 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1489 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1490 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1491 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1492 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1493 { "mpegts_start_pid", "Set the first pid.",
1494 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1495 { .i64 = 0x0100 }, 0x0020, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1496 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1497 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_INT,
1498 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1500 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1501 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1502 { "pes_payload_size", "Minimum PES packet payload in bytes",
1503 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1504 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1505 { "mpegts_flags", "MPEG-TS muxing flags",
1506 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1507 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1508 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1509 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1510 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1511 { "latm", "Use LATM packetization for AAC",
1512 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1513 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1514 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1515 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1516 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1517 // backward compatibility
1518 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1519 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1520 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1521 { "mpegts_copyts", "don't offset dts/pts",
1522 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_INT,
1523 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1524 { "tables_version", "set PAT, PMT and SDT version",
1525 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1526 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1527 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1528 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_INT,
1529 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1530 { "pcr_period", "PCR retransmission time",
1531 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1532 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1536 static const AVClass mpegts_muxer_class = {
1537 .class_name = "MPEGTS muxer",
1538 .item_name = av_default_item_name,
1540 .version = LIBAVUTIL_VERSION_INT,
1543 AVOutputFormat ff_mpegts_muxer = {
1545 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1546 .mime_type = "video/MP2T",
1547 .extensions = "ts,m2t,m2ts,mts",
1548 .priv_data_size = sizeof(MpegTSWrite),
1549 .audio_codec = AV_CODEC_ID_MP2,
1550 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1551 .write_header = mpegts_write_header,
1552 .write_packet = mpegts_write_packet,
1553 .write_trailer = mpegts_write_end,
1554 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS,
1555 .priv_class = &mpegts_muxer_class,