diracdec: Move strides to bytes, and pointer types to uint8_t.
[ffmpeg.git] / libavformat / mpegtsenc.c
index 8efd93e..055e441 100644 (file)
@@ -2,31 +2,35 @@
  * MPEG2 transport stream (aka DVB) muxer
  * Copyright (c) 2003 Fabrice Bellard
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/avassert.h"
 #include "libavutil/bswap.h"
 #include "libavutil/crc.h"
 #include "libavutil/dict.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/mathematics.h"
 #include "libavutil/opt.h"
+
 #include "libavcodec/internal.h"
+
 #include "avformat.h"
+#include "avio_internal.h"
 #include "internal.h"
 #include "mpegts.h"
 
@@ -54,6 +58,16 @@ typedef struct MpegTSService {
     int pcr_packet_period;
 } MpegTSService;
 
+// service_type values as defined in ETSI 300 468
+enum {
+    MPEGTS_SERVICE_TYPE_DIGITAL_TV                   = 0x01,
+    MPEGTS_SERVICE_TYPE_DIGITAL_RADIO                = 0x02,
+    MPEGTS_SERVICE_TYPE_TELETEXT                     = 0x03,
+    MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
+    MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV           = 0x11,
+    MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV  = 0x16,
+    MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV  = 0x19
+};
 typedef struct MpegTSWrite {
     const AVClass *av_class;
     MpegTSSection pat; /* MPEG2 pat table */
@@ -73,55 +87,36 @@ typedef struct MpegTSWrite {
     int transport_stream_id;
     int original_network_id;
     int service_id;
+    int service_type;
 
     int pmt_start_pid;
     int start_pid;
+    int m2ts_mode;
 
     int reemit_pat_pmt; // backward compatibility
 
+    int pcr_period;
 #define MPEGTS_FLAG_REEMIT_PAT_PMT  0x01
 #define MPEGTS_FLAG_AAC_LATM        0x02
+#define MPEGTS_FLAG_PAT_PMT_AT_FRAMES           0x04
     int flags;
+    int copyts;
+    int tables_version;
+    double pat_period;
+    double sdt_period;
+    int64_t last_pat_ts;
+    int64_t last_sdt_ts;
+
+    int omit_video_pes_length;
 } MpegTSWrite;
 
 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
-#define DEFAULT_PES_HEADER_FREQ 16
+#define DEFAULT_PES_HEADER_FREQ  16
 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
 
-static const AVOption options[] = {
-    { "mpegts_transport_stream_id", "Set transport_stream_id field.",
-      offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT, {.i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
-    { "mpegts_original_network_id", "Set original_network_id field.",
-      offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT, {.i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
-    { "mpegts_service_id", "Set service_id field.",
-      offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT, {.i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
-    { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
-      offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT, {.i64 = 0x1000 }, 0x1000, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM},
-    { "mpegts_start_pid", "Set the first pid.",
-      offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT, {.i64 = 0x0100 }, 0x0100, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM},
-    { "muxrate", NULL, offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
-    { "pes_payload_size", "Minimum PES packet payload in bytes",
-      offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT, {.i64 = DEFAULT_PES_PAYLOAD_SIZE}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
-    { "mpegts_flags", "MPEG-TS muxing flags", offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX,
-      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
-    { "resend_headers", "Reemit PAT/PMT before writing the next packet",
-      0, AV_OPT_TYPE_CONST, {.i64 = MPEGTS_FLAG_REEMIT_PAT_PMT}, 0, INT_MAX,
-      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags"},
-    { "latm", "Use LATM packetization for AAC",
-      0, AV_OPT_TYPE_CONST, {.i64 = MPEGTS_FLAG_AAC_LATM}, 0, INT_MAX,
-      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags"},
-    // backward compatibility
-    { "resend_headers", "Reemit PAT/PMT before writing the next packet",
-      offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
-    { NULL },
-};
-
-static const AVClass mpegts_muxer_class = {
-    .class_name     = "MPEGTS muxer",
-    .item_name      = av_default_item_name,
-    .option         = options,
-    .version        = LIBAVUTIL_VERSION_INT,
-};
+/* The section length is 12 bits. The first 2 are set to 0, the remaining
+ * 10 bits should not exceed 1021. */
+#define SECTION_LENGTH 1020
 
 /* NOTE: 4 bytes must be left at the end for the crc32 */
 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
@@ -132,25 +127,27 @@ static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
     unsigned char *q;
     int first, b, len1, left;
 
-    crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, buf, len - 4));
+    crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
+                            -1, buf, len - 4));
+
     buf[len - 4] = (crc >> 24) & 0xff;
     buf[len - 3] = (crc >> 16) & 0xff;
-    buf[len - 2] = (crc >> 8) & 0xff;
-    buf[len - 1] = (crc) & 0xff;
+    buf[len - 2] = (crc >>  8) & 0xff;
+    buf[len - 1] =  crc        & 0xff;
 
     /* send each packet */
     buf_ptr = buf;
     while (len > 0) {
-        first = (buf == buf_ptr);
-        q = packet;
-        *q++ = 0x47;
-        b = (s->pid >> 8);
+        first = buf == buf_ptr;
+        q     = packet;
+        *q++  = 0x47;
+        b     = s->pid >> 8;
         if (first)
             b |= 0x40;
-        *q++ = b;
-        *q++ = s->pid;
-        s->cc = (s->cc + 1) & 0xf;
-        *q++ = 0x10 | s->cc;
+        *q++  = b;
+        *q++  = s->pid;
+        s->cc = s->cc + 1 & 0xf;
+        *q++  = 0x10 | s->cc;
         if (first)
             *q++ = 0; /* 0 offset */
         len1 = TS_PACKET_SIZE - (q - packet);
@@ -166,22 +163,22 @@ static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
         s->write_packet(s, packet);
 
         buf_ptr += len1;
-        len -= len1;
+        len     -= len1;
     }
 }
 
 static inline void put16(uint8_t **q_ptr, int val)
 {
     uint8_t *q;
-    q = *q_ptr;
-    *q++ = val >> 8;
-    *q++ = val;
+    q      = *q_ptr;
+    *q++   = val >> 8;
+    *q++   = val;
     *q_ptr = q;
 }
 
 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
-                          int version, int sec_num, int last_sec_num,
-                          uint8_t *buf, int len)
+                                 int version, int sec_num, int last_sec_num,
+                                 uint8_t *buf, int len)
 {
     uint8_t section[1024], *q;
     unsigned int tot_len;
@@ -191,9 +188,9 @@ static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
     tot_len = 3 + 5 + len + 4;
     /* check if not too big */
     if (tot_len > 1024)
-        return -1;
+        return AVERROR_INVALIDDATA;
 
-    q = section;
+    q    = section;
     *q++ = tid;
     put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
     put16(&q, id);
@@ -209,7 +206,7 @@ static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
 /*********************************************/
 /* mpegts writer */
 
-#define DEFAULT_PROVIDER_NAME   "Libav"
+#define DEFAULT_PROVIDER_NAME   "FFmpeg"
 #define DEFAULT_SERVICE_NAME    "Service01"
 
 /* we retransmit the SI info at this rate */
@@ -223,35 +220,41 @@ typedef struct MpegTSWriteStream {
     int cc;
     int payload_size;
     int first_pts_check; ///< first pts check needed
+    int prev_payload_key;
     int64_t payload_pts;
     int64_t payload_dts;
     int payload_flags;
     uint8_t *payload;
     AVFormatContext *amux;
+    AVRational user_tb;
+
+    /* For Opus */
+    int opus_queued_samples;
+    int opus_pending_trim_start;
 } MpegTSWriteStream;
 
 static void mpegts_write_pat(AVFormatContext *s)
 {
     MpegTSWrite *ts = s->priv_data;
     MpegTSService *service;
-    uint8_t data[1012], *q;
+    uint8_t data[SECTION_LENGTH], *q;
     int i;
 
     q = data;
-    for(i = 0; i < ts->nb_services; i++) {
+    for (i = 0; i < ts->nb_services; i++) {
         service = ts->services[i];
         put16(&q, service->sid);
         put16(&q, 0xe000 | service->pmt.pid);
     }
-    mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,
+    mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
                           data, q - data);
 }
 
-static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
+static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
 {
     MpegTSWrite *ts = s->priv_data;
-    uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;
-    int val, stream_type, i;
+    uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
+    int val, stream_type, i, err = 0;
 
     q = data;
     put16(&q, 0xe000 | service->pcr_pid);
@@ -265,11 +268,16 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
     program_info_length_ptr[0] = val >> 8;
     program_info_length_ptr[1] = val;
 
-    for(i = 0; i < s->nb_streams; i++) {
+    for (i = 0; i < s->nb_streams; i++) {
         AVStream *st = s->streams[i];
         MpegTSWriteStream *ts_st = st->priv_data;
-        AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL,0);
-        switch(st->codec->codec_id) {
+        AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
+
+        if (q - data > SECTION_LENGTH - 32) {
+            err = 1;
+            break;
+        }
+        switch (st->codec->codec_id) {
         case AV_CODEC_ID_MPEG1VIDEO:
         case AV_CODEC_ID_MPEG2VIDEO:
             stream_type = STREAM_TYPE_VIDEO_MPEG2;
@@ -280,18 +288,26 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
         case AV_CODEC_ID_H264:
             stream_type = STREAM_TYPE_VIDEO_H264;
             break;
+        case AV_CODEC_ID_HEVC:
+            stream_type = STREAM_TYPE_VIDEO_HEVC;
+            break;
         case AV_CODEC_ID_CAVS:
             stream_type = STREAM_TYPE_VIDEO_CAVS;
             break;
         case AV_CODEC_ID_DIRAC:
             stream_type = STREAM_TYPE_VIDEO_DIRAC;
             break;
+        case AV_CODEC_ID_VC1:
+            stream_type = STREAM_TYPE_VIDEO_VC1;
+            break;
         case AV_CODEC_ID_MP2:
         case AV_CODEC_ID_MP3:
             stream_type = STREAM_TYPE_AUDIO_MPEG1;
             break;
         case AV_CODEC_ID_AAC:
-            stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM) ? STREAM_TYPE_AUDIO_AAC_LATM : STREAM_TYPE_AUDIO_AAC;
+            stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
+                          ? STREAM_TYPE_AUDIO_AAC_LATM
+                          : STREAM_TYPE_AUDIO_AAC;
             break;
         case AV_CODEC_ID_AAC_LATM:
             stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
@@ -299,28 +315,132 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
         case AV_CODEC_ID_AC3:
             stream_type = STREAM_TYPE_AUDIO_AC3;
             break;
+        case AV_CODEC_ID_DTS:
+            stream_type = STREAM_TYPE_AUDIO_DTS;
+            break;
+        case AV_CODEC_ID_TRUEHD:
+            stream_type = STREAM_TYPE_AUDIO_TRUEHD;
+            break;
+        case AV_CODEC_ID_OPUS:
+            stream_type = STREAM_TYPE_PRIVATE_DATA;
+            break;
         default:
             stream_type = STREAM_TYPE_PRIVATE_DATA;
             break;
         }
+
         *q++ = stream_type;
         put16(&q, 0xe000 | ts_st->pid);
         desc_length_ptr = q;
         q += 2; /* patched after */
 
         /* write optional descriptors here */
-        switch(st->codec->codec_type) {
+        switch (st->codec->codec_type) {
         case AVMEDIA_TYPE_AUDIO:
+            if (st->codec->codec_id==AV_CODEC_ID_EAC3) {
+                *q++=0x7a; // EAC3 descriptor see A038 DVB SI
+                *q++=1; // 1 byte, all flags sets to 0
+                *q++=0; // omit all fields...
+            }
+            if (st->codec->codec_id==AV_CODEC_ID_S302M) {
+                *q++ = 0x05; /* MPEG-2 registration descriptor*/
+                *q++ = 4;
+                *q++ = 'B';
+                *q++ = 'S';
+                *q++ = 'S';
+                *q++ = 'D';
+            }
+            if (st->codec->codec_id==AV_CODEC_ID_OPUS) {
+                /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
+                if (q - data > SECTION_LENGTH - 6 - 4) {
+                    err = 1;
+                    break;
+                }
+
+                *q++ = 0x05; /* MPEG-2 registration descriptor*/
+                *q++ = 4;
+                *q++ = 'O';
+                *q++ = 'p';
+                *q++ = 'u';
+                *q++ = 's';
+
+                *q++ = 0x7f; /* DVB extension descriptor */
+                *q++ = 2;
+                *q++ = 0x80;
+
+                if (st->codec->extradata && st->codec->extradata_size >= 19) {
+                    if (st->codec->extradata[18] == 0 && st->codec->channels <= 2) {
+                        /* RTP mapping family */
+                        *q++ = st->codec->channels;
+                    } else if (st->codec->extradata[18] == 1 && st->codec->channels <= 8 &&
+                               st->codec->extradata_size >= 21 + st->codec->channels) {
+                        static const uint8_t coupled_stream_counts[9] = {
+                            1, 0, 1, 1, 2, 2, 2, 3, 3
+                        };
+                        static const uint8_t channel_map_a[8][8] = {
+                            {0},
+                            {0, 1},
+                            {0, 2, 1},
+                            {0, 1, 2, 3},
+                            {0, 4, 1, 2, 3},
+                            {0, 4, 1, 2, 3, 5},
+                            {0, 4, 1, 2, 3, 5, 6},
+                            {0, 6, 1, 2, 3, 4, 5, 7},
+                        };
+                        static const uint8_t channel_map_b[8][8] = {
+                            {0},
+                            {0, 1},
+                            {0, 1, 2},
+                            {0, 1, 2, 3},
+                            {0, 1, 2, 3, 4},
+                            {0, 1, 2, 3, 4, 5},
+                            {0, 1, 2, 3, 4, 5, 6},
+                            {0, 1, 2, 3, 4, 5, 6, 7},
+                        };
+                        /* Vorbis mapping family */
+
+                        if (st->codec->extradata[19] == st->codec->channels - coupled_stream_counts[st->codec->channels] &&
+                            st->codec->extradata[20] == coupled_stream_counts[st->codec->channels] &&
+                            memcmp(&st->codec->extradata[21], channel_map_a[st->codec->channels-1], st->codec->channels) == 0) {
+                            *q++ = st->codec->channels;
+                        } else if (st->codec->channels >= 2 && st->codec->extradata[19] == st->codec->channels &&
+                                   st->codec->extradata[20] == 0 &&
+                                   memcmp(&st->codec->extradata[21], channel_map_b[st->codec->channels-1], st->codec->channels) == 0) {
+                            *q++ = st->codec->channels | 0x80;
+                        } else {
+                            /* Unsupported, could write an extended descriptor here */
+                            av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
+                            *q++ = 0xff;
+                        }
+                    } else {
+                        /* Unsupported */
+                        av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codec->extradata[18]);
+                        *q++ = 0xff;
+                    }
+                } else if (st->codec->channels <= 2) {
+                    /* Assume RTP mapping family */
+                    *q++ = st->codec->channels;
+                } else {
+                    /* Unsupported */
+                    av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
+                    *q++ = 0xff;
+                }
+            }
+
             if (lang) {
                 char *p;
                 char *next = lang->value;
                 uint8_t *len_ptr;
 
-                *q++ = 0x0a; /* ISO 639 language descriptor */
-                len_ptr = q++;
+                *q++     = 0x0a; /* ISO 639 language descriptor */
+                len_ptr  = q++;
                 *len_ptr = 0;
 
                 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
+                    if (q - data > SECTION_LENGTH - 4) {
+                        err = 1;
+                        break;
+                    }
                     next = strchr(p, ',');
                     if (strlen(p) != 3 && (!next || next != p + 3))
                         continue; /* not a 3-letter code */
@@ -329,14 +449,14 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
                     *q++ = *p++;
                     *q++ = *p++;
 
-                if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
-                    *q++ = 0x01;
-                else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
-                    *q++ = 0x02;
-                else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
-                    *q++ = 0x03;
-                else
-                    *q++ = 0; /* undefined type */
+                    if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
+                        *q++ = 0x01;
+                    else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
+                        *q++ = 0x02;
+                    else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
+                        *q++ = 0x03;
+                    else
+                        *q++ = 0; /* undefined type */
 
                     *len_ptr += 4;
                 }
@@ -346,24 +466,86 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
             }
             break;
         case AVMEDIA_TYPE_SUBTITLE:
-            {
-                const char *language;
-                language = lang && strlen(lang->value)==3 ? lang->value : "eng";
-                *q++ = 0x59;
-                *q++ = 8;
-                *q++ = language[0];
-                *q++ = language[1];
-                *q++ = language[2];
-                *q++ = 0x10; /* normal subtitles (0x20 = if hearing pb) */
-                if(st->codec->extradata_size == 4) {
-                    memcpy(q, st->codec->extradata, 4);
-                    q += 4;
-                } else {
-                    put16(&q, 1); /* page id */
-                    put16(&q, 1); /* ancillary page id */
-                }
+        {
+           const char default_language[] = "und";
+           const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
+
+           if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
+               uint8_t *len_ptr;
+               int extradata_copied = 0;
+
+               *q++ = 0x59; /* subtitling_descriptor */
+               len_ptr = q++;
+
+               while (strlen(language) >= 3) {
+                   if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
+                       err = 1;
+                       break;
+                   }
+                   *q++ = *language++;
+                   *q++ = *language++;
+                   *q++ = *language++;
+                   /* Skip comma */
+                   if (*language != '\0')
+                       language++;
+
+                   if (st->codec->extradata_size - extradata_copied >= 5) {
+                       *q++ = st->codec->extradata[extradata_copied + 4]; /* subtitling_type */
+                       memcpy(q, st->codec->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
+                       extradata_copied += 5;
+                       q += 4;
+                   } else {
+                       /* subtitling_type:
+                        * 0x10 - normal with no monitor aspect ratio criticality
+                        * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
+                       *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
+                       if ((st->codec->extradata_size == 4) && (extradata_copied == 0)) {
+                           /* support of old 4-byte extradata format */
+                           memcpy(q, st->codec->extradata, 4); /* composition_page_id and ancillary_page_id */
+                           extradata_copied += 4;
+                           q += 4;
+                       } else {
+                           put16(&q, 1); /* composition_page_id */
+                           put16(&q, 1); /* ancillary_page_id */
+                       }
+                   }
+               }
+
+               *len_ptr = q - len_ptr - 1;
+           } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
+               uint8_t *len_ptr = NULL;
+               int extradata_copied = 0;
+
+               /* The descriptor tag. teletext_descriptor */
+               *q++ = 0x56;
+               len_ptr = q++;
+
+               while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
+                   *q++ = *language++;
+                   *q++ = *language++;
+                   *q++ = *language++;
+                   /* Skip comma */
+                   if (*language != '\0')
+                       language++;
+
+                   if (st->codec->extradata_size - 1 > extradata_copied) {
+                       memcpy(q, st->codec->extradata + extradata_copied, 2);
+                       extradata_copied += 2;
+                       q += 2;
+                   } else {
+                       /* The Teletext descriptor:
+                        * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
+                        * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
+                        * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
+                       *q++ = 0x08;
+                       *q++ = 0x00;
+                   }
+               }
+
+               *len_ptr = q - len_ptr - 1;
             }
-            break;
+        }
+        break;
         case AVMEDIA_TYPE_VIDEO:
             if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
                 *q++ = 0x05; /*MPEG-2 registration descriptor*/
@@ -372,6 +554,23 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
                 *q++ = 'r';
                 *q++ = 'a';
                 *q++ = 'c';
+            } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
+                *q++ = 0x05; /*MPEG-2 registration descriptor*/
+                *q++ = 4;
+                *q++ = 'V';
+                *q++ = 'C';
+                *q++ = '-';
+                *q++ = '1';
+            }
+            break;
+        case AVMEDIA_TYPE_DATA:
+            if (st->codec->codec_id == AV_CODEC_ID_SMPTE_KLV) {
+                *q++ = 0x05; /* MPEG-2 registration descriptor */
+                *q++ = 4;
+                *q++ = 'K';
+                *q++ = 'L';
+                *q++ = 'V';
+                *q++ = 'A';
             }
             break;
         }
@@ -380,11 +579,19 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
         desc_length_ptr[0] = val >> 8;
         desc_length_ptr[1] = val;
     }
-    mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
+
+    if (err)
+        av_log(s, AV_LOG_ERROR,
+               "The PMT section cannot fit stream %d and all following streams.\n"
+               "Try reducing the number of languages in the audio streams "
+               "or the total number of streams.\n", i);
+
+    mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
                           data, q - data);
+    return 0;
 }
 
-/* NOTE: str == NULL is accepted for an empty string */
+/* NOTE: !str is accepted for an empty string */
 static void putstr8(uint8_t **q_ptr, const char *str)
 {
     uint8_t *q;
@@ -397,7 +604,7 @@ static void putstr8(uint8_t **q_ptr, const char *str)
         len = strlen(str);
     *q++ = len;
     memcpy(q, str, len);
-    q += len;
+    q     += len;
     *q_ptr = q;
 }
 
@@ -405,42 +612,41 @@ static void mpegts_write_sdt(AVFormatContext *s)
 {
     MpegTSWrite *ts = s->priv_data;
     MpegTSService *service;
-    uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;
+    uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
     int i, running_status, free_ca_mode, val;
 
     q = data;
     put16(&q, ts->onid);
     *q++ = 0xff;
-    for(i = 0; i < ts->nb_services; i++) {
+    for (i = 0; i < ts->nb_services; i++) {
         service = ts->services[i];
         put16(&q, service->sid);
-        *q++ = 0xfc | 0x00; /* currently no EIT info */
+        *q++              = 0xfc | 0x00; /* currently no EIT info */
         desc_list_len_ptr = q;
-        q += 2;
-        running_status = 4; /* running */
-        free_ca_mode = 0;
+        q                += 2;
+        running_status    = 4; /* running */
+        free_ca_mode      = 0;
 
         /* write only one descriptor for the service name and provider */
-        *q++ = 0x48;
+        *q++         = 0x48;
         desc_len_ptr = q;
         q++;
-        *q++ = 0x01; /* digital television service */
+        *q++         = ts->service_type;
         putstr8(&q, service->provider_name);
         putstr8(&q, service->name);
         desc_len_ptr[0] = q - desc_len_ptr - 1;
 
         /* fill descriptor length */
         val = (running_status << 13) | (free_ca_mode << 12) |
-            (q - desc_list_len_ptr - 2);
+              (q - desc_list_len_ptr - 2);
         desc_list_len_ptr[0] = val >> 8;
         desc_list_len_ptr[1] = val;
     }
-    mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,
+    mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
                           data, q - data);
 }
 
-static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
-                                         int sid,
+static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
                                          const char *provider_name,
                                          const char *name)
 {
@@ -449,18 +655,46 @@ static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
     service = av_mallocz(sizeof(MpegTSService));
     if (!service)
         return NULL;
-    service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
-    service->sid = sid;
+    service->pmt.pid       = ts->pmt_start_pid + ts->nb_services;
+    service->sid           = sid;
+    service->pcr_pid       = 0x1fff;
     service->provider_name = av_strdup(provider_name);
-    service->name = av_strdup(name);
-    service->pcr_pid = 0x1fff;
-    dynarray_add(&ts->services, &ts->nb_services, service);
+    service->name          = av_strdup(name);
+    if (!service->provider_name || !service->name)
+        goto fail;
+    if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
+        goto fail;
+
     return service;
+fail:
+    av_freep(&service->provider_name);
+    av_freep(&service->name);
+    av_free(service);
+    return NULL;
+}
+
+static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
+{
+    return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
+           ts->first_pcr;
+}
+
+static void mpegts_prefix_m2ts_header(AVFormatContext *s)
+{
+    MpegTSWrite *ts = s->priv_data;
+    if (ts->m2ts_mode) {
+        int64_t pcr = get_pcr(s->priv_data, s->pb);
+        uint32_t tp_extra_header = pcr % 0x3fffffff;
+        tp_extra_header = AV_RB32(&tp_extra_header);
+        avio_write(s->pb, (unsigned char *) &tp_extra_header,
+                   sizeof(tp_extra_header));
+    }
 }
 
 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
 {
     AVFormatContext *ctx = s->opaque;
+    mpegts_prefix_m2ts_header(ctx);
     avio_write(ctx->pb, packet, TS_PACKET_SIZE);
 }
 
@@ -489,38 +723,51 @@ static int mpegts_write_header(AVFormatContext *s)
     title = av_dict_get(s->metadata, "service_name", NULL, 0);
     if (!title)
         title = av_dict_get(s->metadata, "title", NULL, 0);
-    service_name = title ? title->value : DEFAULT_SERVICE_NAME;
-    provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
+    service_name  = title ? title->value : DEFAULT_SERVICE_NAME;
+    provider      = av_dict_get(s->metadata, "service_provider", NULL, 0);
     provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
-    service = mpegts_add_service(ts, ts->service_id, provider_name, service_name);
+    service       = mpegts_add_service(ts, ts->service_id,
+                                       provider_name, service_name);
+
+    if (!service)
+        return AVERROR(ENOMEM);
+
     service->pmt.write_packet = section_write_packet;
-    service->pmt.opaque = s;
-    service->pmt.cc = 15;
+    service->pmt.opaque       = s;
+    service->pmt.cc           = 15;
 
-    ts->pat.pid = PAT_PID;
-    ts->pat.cc = 15; // Initialize at 15 so that it wraps and be equal to 0 for the first packet we write
+    ts->pat.pid          = PAT_PID;
+    /* Initialize at 15 so that it wraps and is equal to 0 for the
+     * first packet we write. */
+    ts->pat.cc           = 15;
     ts->pat.write_packet = section_write_packet;
-    ts->pat.opaque = s;
+    ts->pat.opaque       = s;
 
-    ts->sdt.pid = SDT_PID;
-    ts->sdt.cc = 15;
+    ts->sdt.pid          = SDT_PID;
+    ts->sdt.cc           = 15;
     ts->sdt.write_packet = section_write_packet;
-    ts->sdt.opaque = s;
+    ts->sdt.opaque       = s;
 
-    pids = av_malloc(s->nb_streams * sizeof(*pids));
-    if (!pids)
-        return AVERROR(ENOMEM);
+    pids = av_malloc_array(s->nb_streams, sizeof(*pids));
+    if (!pids) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
 
     /* assign pids to each stream */
-    for(i = 0;i < s->nb_streams; i++) {
+    for (i = 0; i < s->nb_streams; i++) {
         st = s->streams[i];
-        avpriv_set_pts_info(st, 33, 1, 90000);
+
         ts_st = av_mallocz(sizeof(MpegTSWriteStream));
         if (!ts_st) {
             ret = AVERROR(ENOMEM);
             goto fail;
         }
         st->priv_data = ts_st;
+
+        ts_st->user_tb = st->time_base;
+        avpriv_set_pts_info(st, 33, 1, 90000);
+
         ts_st->payload = av_mallocz(ts->pes_payload_size);
         if (!ts_st->payload) {
             ret = AVERROR(ENOMEM);
@@ -534,7 +781,8 @@ static int mpegts_write_header(AVFormatContext *s)
         } else if (st->id < 0x1FFF) {
             ts_st->pid = st->id;
         } else {
-            av_log(s, AV_LOG_ERROR, "Invalid stream id %d, must be less than 8191\n", st->id);
+            av_log(s, AV_LOG_ERROR,
+                   "Invalid stream id %d, must be less than 8191\n", st->id);
             ret = AVERROR(EINVAL);
             goto fail;
         }
@@ -543,108 +791,137 @@ static int mpegts_write_header(AVFormatContext *s)
             ret = AVERROR(EINVAL);
             goto fail;
         }
-        for (j = 0; j < i; j++)
+        for (j = 0; j < i; j++) {
             if (pids[j] == ts_st->pid) {
                 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
                 ret = AVERROR(EINVAL);
                 goto fail;
             }
-        pids[i] = ts_st->pid;
-        ts_st->payload_pts = AV_NOPTS_VALUE;
-        ts_st->payload_dts = AV_NOPTS_VALUE;
+        }
+        pids[i]                = ts_st->pid;
+        ts_st->payload_pts     = AV_NOPTS_VALUE;
+        ts_st->payload_dts     = AV_NOPTS_VALUE;
         ts_st->first_pts_check = 1;
-        ts_st->cc = 15;
+        ts_st->cc              = 15;
         /* update PCR pid by using the first video stream */
         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
             service->pcr_pid == 0x1fff) {
             service->pcr_pid = ts_st->pid;
-            pcr_st = st;
+            pcr_st           = st;
         }
         if (st->codec->codec_id == AV_CODEC_ID_AAC &&
-            st->codec->extradata_size > 0)
-        {
+            st->codec->extradata_size > 0) {
             AVStream *ast;
             ts_st->amux = avformat_alloc_context();
             if (!ts_st->amux) {
                 ret = AVERROR(ENOMEM);
                 goto fail;
             }
-            ts_st->amux->oformat = av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts", NULL, NULL);
+            ts_st->amux->oformat =
+                av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
+                                NULL, NULL);
             if (!ts_st->amux->oformat) {
                 ret = AVERROR(EINVAL);
                 goto fail;
             }
-            ast = avformat_new_stream(ts_st->amux, NULL);
+            if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
+                ret = AVERROR(ENOMEM);
+                goto fail;
+            }
             ret = avcodec_copy_context(ast->codec, st->codec);
             if (ret != 0)
                 goto fail;
+            ast->time_base = st->time_base;
             ret = avformat_write_header(ts_st->amux, NULL);
             if (ret < 0)
                 goto fail;
         }
+        if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
+            ts_st->opus_pending_trim_start = st->codec->initial_padding * 48000 / st->codec->sample_rate;
+        }
     }
 
-    av_free(pids);
+    av_freep(&pids);
 
     /* if no video stream, use the first stream as PCR */
     if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
-        pcr_st = s->streams[0];
-        ts_st = pcr_st->priv_data;
+        pcr_st           = s->streams[0];
+        ts_st            = pcr_st->priv_data;
         service->pcr_pid = ts_st->pid;
-    }
+    } else
+        ts_st = pcr_st->priv_data;
 
     if (ts->mux_rate > 1) {
-        service->pcr_packet_period = (ts->mux_rate * PCR_RETRANS_TIME) /
-            (TS_PACKET_SIZE * 8 * 1000);
-        ts->sdt_packet_period      = (ts->mux_rate * SDT_RETRANS_TIME) /
-            (TS_PACKET_SIZE * 8 * 1000);
-        ts->pat_packet_period      = (ts->mux_rate * PAT_RETRANS_TIME) /
-            (TS_PACKET_SIZE * 8 * 1000);
-
-        ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
+        service->pcr_packet_period = (int64_t)ts->mux_rate * ts->pcr_period /
+                                     (TS_PACKET_SIZE * 8 * 1000);
+        ts->sdt_packet_period      = (int64_t)ts->mux_rate * SDT_RETRANS_TIME /
+                                     (TS_PACKET_SIZE * 8 * 1000);
+        ts->pat_packet_period      = (int64_t)ts->mux_rate * PAT_RETRANS_TIME /
+                                     (TS_PACKET_SIZE * 8 * 1000);
+
+        if (ts->copyts < 1)
+            ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
     } else {
-        /* Arbitrary values, PAT/PMT could be written on key frames */
+        /* Arbitrary values, PAT/PMT will also be written on video key frames */
         ts->sdt_packet_period = 200;
         ts->pat_packet_period = 40;
         if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
             if (!pcr_st->codec->frame_size) {
                 av_log(s, AV_LOG_WARNING, "frame size not set\n");
                 service->pcr_packet_period =
-                    pcr_st->codec->sample_rate/(10*512);
+                    pcr_st->codec->sample_rate / (10 * 512);
             } else {
                 service->pcr_packet_period =
-                    pcr_st->codec->sample_rate/(10*pcr_st->codec->frame_size);
+                    pcr_st->codec->sample_rate / (10 * pcr_st->codec->frame_size);
             }
         } else {
             // max delta PCR 0.1s
+            // TODO: should be avg_frame_rate
             service->pcr_packet_period =
-                pcr_st->codec->time_base.den/(10*pcr_st->codec->time_base.num);
+                ts_st->user_tb.den / (10 * ts_st->user_tb.num);
         }
+        if (!service->pcr_packet_period)
+            service->pcr_packet_period = 1;
+    }
+
+    ts->last_pat_ts = AV_NOPTS_VALUE;
+    ts->last_sdt_ts = AV_NOPTS_VALUE;
+    // The user specified a period, use only it
+    if (ts->pat_period < INT_MAX/2) {
+        ts->pat_packet_period = INT_MAX;
+    }
+    if (ts->sdt_period < INT_MAX/2) {
+        ts->sdt_packet_period = INT_MAX;
     }
 
     // output a PCR as soon as possible
     service->pcr_packet_count = service->pcr_packet_period;
-    ts->pat_packet_count = ts->pat_packet_period-1;
-    ts->sdt_packet_count = ts->sdt_packet_period-1;
+    ts->pat_packet_count      = ts->pat_packet_period - 1;
+    ts->sdt_packet_count      = ts->sdt_packet_period - 1;
 
     if (ts->mux_rate == 1)
         av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
     else
         av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
-    av_log(s, AV_LOG_VERBOSE, "pcr every %d pkts, "
-           "sdt every %d, pat/pmt every %d pkts\n",
+    av_log(s, AV_LOG_VERBOSE,
+           "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
            service->pcr_packet_period,
            ts->sdt_packet_period, ts->pat_packet_period);
 
-    avio_flush(s->pb);
+    if (ts->m2ts_mode == -1) {
+        if (av_match_ext(s->filename, "m2ts")) {
+            ts->m2ts_mode = 1;
+        } else {
+            ts->m2ts_mode = 0;
+        }
+    }
 
     return 0;
 
- fail:
-    av_free(pids);
-    for(i = 0;i < s->nb_streams; i++) {
-        MpegTSWriteStream *ts_st;
-        st = s->streams[i];
+fail:
+    av_freep(&pids);
+    for (i = 0; i < s->nb_streams; i++) {
+        st    = s->streams[i];
         ts_st = st->priv_data;
         if (ts_st) {
             av_freep(&ts_st->payload);
@@ -655,43 +932,54 @@ static int mpegts_write_header(AVFormatContext *s)
         }
         av_freep(&st->priv_data);
     }
+
+    for (i = 0; i < ts->nb_services; i++) {
+        service = ts->services[i];
+        av_freep(&service->provider_name);
+        av_freep(&service->name);
+        av_freep(&service);
+    }
+    av_freep(&ts->services);
     return ret;
 }
 
 /* send SDT, PAT and PMT tables regulary */
-static void retransmit_si_info(AVFormatContext *s)
+static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
 {
     MpegTSWrite *ts = s->priv_data;
     int i;
 
-    if (++ts->sdt_packet_count == ts->sdt_packet_period) {
+    if (++ts->sdt_packet_count == ts->sdt_packet_period ||
+        (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
+        (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
+    ) {
         ts->sdt_packet_count = 0;
+        if (dts != AV_NOPTS_VALUE)
+            ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
         mpegts_write_sdt(s);
     }
-    if (++ts->pat_packet_count == ts->pat_packet_period) {
+    if (++ts->pat_packet_count == ts->pat_packet_period ||
+        (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
+        (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
+        force_pat) {
         ts->pat_packet_count = 0;
+        if (dts != AV_NOPTS_VALUE)
+            ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
         mpegts_write_pat(s);
-        for(i = 0; i < ts->nb_services; i++) {
+        for (i = 0; i < ts->nb_services; i++)
             mpegts_write_pmt(s, ts->services[i]);
-        }
     }
 }
 
-static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
-{
-    return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
-           ts->first_pcr;
-}
-
 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
 {
     int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
 
     *buf++ = pcr_high >> 25;
     *buf++ = pcr_high >> 17;
-    *buf++ = pcr_high >> 9;
-    *buf++ = pcr_high >> 1;
-    *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
+    *buf++ = pcr_high >>  9;
+    *buf++ = pcr_high >>  1;
+    *buf++ = pcr_high <<  7 | pcr_low >> 8 | 0x7e;
     *buf++ = pcr_low;
 
     return 6;
@@ -703,12 +991,13 @@ static void mpegts_insert_null_packet(AVFormatContext *s)
     uint8_t *q;
     uint8_t buf[TS_PACKET_SIZE];
 
-    q = buf;
+    q    = buf;
     *q++ = 0x47;
     *q++ = 0x00 | 0x1f;
     *q++ = 0xff;
     *q++ = 0x10;
     memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
+    mpegts_prefix_m2ts_header(s);
     avio_write(s->pb, buf, TS_PACKET_SIZE);
 }
 
@@ -720,7 +1009,7 @@ static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
     uint8_t *q;
     uint8_t buf[TS_PACKET_SIZE];
 
-    q = buf;
+    q    = buf;
     *q++ = 0x47;
     *q++ = ts_st->pid >> 8;
     *q++ = ts_st->pid;
@@ -734,6 +1023,7 @@ static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
 
     /* stuffing bytes */
     memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
+    mpegts_prefix_m2ts_header(s);
     avio_write(s->pb, buf, TS_PACKET_SIZE);
 }
 
@@ -741,12 +1031,12 @@ static void write_pts(uint8_t *q, int fourbits, int64_t pts)
 {
     int val;
 
-    val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
+    val  = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
     *q++ = val;
-    val = (((pts >> 15) & 0x7fff) << 1) | 1;
+    val  = (((pts >> 15) & 0x7fff) << 1) | 1;
     *q++ = val >> 8;
     *q++ = val;
-    val = (((pts) & 0x7fff) << 1) | 1;
+    val  = (((pts) & 0x7fff) << 1) | 1;
     *q++ = val >> 8;
     *q++ = val;
 }
@@ -755,7 +1045,7 @@ static void write_pts(uint8_t *q, int fourbits, int64_t pts)
 static void set_af_flag(uint8_t *pkt, int flag)
 {
     // expect at least one flag to set
-    assert(flag);
+    av_assert0(flag);
 
     if ((pkt[3] & 0x20) == 0) {
         // no AF yet, set adaptation field flag
@@ -771,7 +1061,7 @@ static void set_af_flag(uint8_t *pkt, int flag)
 static void extend_af(uint8_t *pkt, int size)
 {
     // expect already existing adaptation field
-    assert(pkt[3] & 0x20);
+    av_assert0(pkt[3] & 0x20);
     pkt[4] += size;
 }
 
@@ -784,11 +1074,10 @@ static uint8_t *get_ts_payload_start(uint8_t *pkt)
         return pkt + 4;
 }
 
-/* Add a pes header to the front of payload, and segment into an integer number of
- * ts packets. The final ts packet is padded using an over-sized adaptation header
- * to exactly fill the last ts packet.
- * NOTE: 'payload' contains a complete PES payload.
- */
+/* Add a PES header to the front of the payload, and segment into an integer
+ * number of TS packets. The final TS packet is padded using an oversized
+ * adaptation header to exactly fill the last TS packet.
+ * NOTE: 'payload' contains a complete PES payload. */
 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
                              const uint8_t *payload, int payload_size,
                              int64_t pts, int64_t dts, int key)
@@ -797,14 +1086,21 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
     MpegTSWrite *ts = s->priv_data;
     uint8_t buf[TS_PACKET_SIZE];
     uint8_t *q;
-    int val, is_start, len, header_len, write_pcr, private_code, flags;
+    int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
     int afc_len, stuffing_len;
     int64_t pcr = -1; /* avoid warning */
     int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
+    int force_pat = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
+
+    av_assert0(ts_st->payload != buf || st->codec->codec_type != AVMEDIA_TYPE_VIDEO);
+    if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+        force_pat = 1;
+    }
 
     is_start = 1;
     while (payload_size > 0) {
-        retransmit_si_info(s);
+        retransmit_si_info(s, force_pat, dts);
+        force_pat = 0;
 
         write_pcr = 0;
         if (ts_st->pid == ts_st->service->pcr_pid) {
@@ -818,25 +1114,26 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
         }
 
         if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
-            (dts - get_pcr(ts, s->pb)/300) > delay) {
+            (dts - get_pcr(ts, s->pb) / 300) > delay) {
             /* pcr insert gets priority over null packet insert */
             if (write_pcr)
                 mpegts_insert_pcr_only(s, st);
             else
                 mpegts_insert_null_packet(s);
-            continue; /* recalculate write_pcr and possibly retransmit si_info */
+            /* recalculate write_pcr and possibly retransmit si_info */
+            continue;
         }
 
         /* prepare packet header */
-        q = buf;
+        q    = buf;
         *q++ = 0x47;
-        val = (ts_st->pid >> 8);
+        val  = ts_st->pid >> 8;
         if (is_start)
             val |= 0x40;
-        *q++ = val;
-        *q++ = ts_st->pid;
-        ts_st->cc = (ts_st->cc + 1) & 0xf;
-        *q++ = 0x10 | ts_st->cc; // payload indicator + CC
+        *q++      = val;
+        *q++      = ts_st->pid;
+        ts_st->cc = ts_st->cc + 1 & 0xf;
+        *q++      = 0x10 | ts_st->cc; // payload indicator + CC
         if (key && is_start && pts != AV_NOPTS_VALUE) {
             // set Random Access for key frames
             if (ts_st->pid == ts_st->service->pcr_pid)
@@ -851,7 +1148,7 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
             if (ts->mux_rate > 1)
                 pcr = get_pcr(ts, s->pb);
             else
-                pcr = (dts - delay)*300;
+                pcr = (dts - delay) * 300;
             if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
                 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
             extend_af(buf, write_pcr_bits(q, pcr));
@@ -859,60 +1156,89 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
         }
         if (is_start) {
             int pes_extension = 0;
+            int pes_header_stuffing_bytes = 0;
             /* write PES header */
             *q++ = 0x00;
             *q++ = 0x00;
             *q++ = 0x01;
-            private_code = 0;
+            is_dvb_subtitle = 0;
+            is_dvb_teletext = 0;
             if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
-                if (st->codec->codec_id == AV_CODEC_ID_DIRAC) {
+                if (st->codec->codec_id == AV_CODEC_ID_DIRAC)
                     *q++ = 0xfd;
-                else
+                else
                     *q++ = 0xe0;
             } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
                        (st->codec->codec_id == AV_CODEC_ID_MP2 ||
                         st->codec->codec_id == AV_CODEC_ID_MP3 ||
                         st->codec->codec_id == AV_CODEC_ID_AAC)) {
                 *q++ = 0xc0;
+            } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
+                        st->codec->codec_id == AV_CODEC_ID_AC3 &&
+                        ts->m2ts_mode) {
+                *q++ = 0xfd;
             } else {
                 *q++ = 0xbd;
                 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
-                    private_code = 0x20;
+                    if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
+                        is_dvb_subtitle = 1;
+                    } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
+                        is_dvb_teletext = 1;
+                    }
                 }
             }
             header_len = 0;
-            flags = 0;
+            flags      = 0;
             if (pts != AV_NOPTS_VALUE) {
                 header_len += 5;
-                flags |= 0x80;
+                flags      |= 0x80;
             }
             if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
                 header_len += 5;
-                flags |= 0x40;
+                flags      |= 0x40;
             }
             if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
                 st->codec->codec_id == AV_CODEC_ID_DIRAC) {
                 /* set PES_extension_flag */
                 pes_extension = 1;
-                flags |= 0x01;
+                flags        |= 0x01;
 
-                /*
-                * One byte for PES2 extension flag +
-                * one byte for extension length +
-                * one byte for extension id
-                */
+                /* One byte for PES2 extension flag +
+                 * one byte for extension length +
+                 * one byte for extension id */
                 header_len += 3;
             }
+            /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
+             * otherwise it will not play sound on blu-ray
+             */
+            if (ts->m2ts_mode &&
+                st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
+                st->codec->codec_id == AV_CODEC_ID_AC3) {
+                        /* set PES_extension_flag */
+                        pes_extension = 1;
+                        flags |= 0x01;
+                        header_len += 3;
+            }
+            if (is_dvb_teletext) {
+                pes_header_stuffing_bytes = 0x24 - header_len;
+                header_len = 0x24;
+            }
             len = payload_size + header_len + 3;
-            if (private_code != 0)
-                len++;
+            /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
+            if (is_dvb_subtitle) {
+                len += 3;
+                payload_size++;
+            }
             if (len > 0xffff)
                 len = 0;
+            if (ts->omit_video_pes_length && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+                len = 0;
+            }
             *q++ = len >> 8;
             *q++ = len;
-            val = 0x80;
-            /* data alignment indicator is required for subtitle data */
-            if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
+            val  = 0x80;
+            /* data alignment indicator is required for subtitle and data streams */
+            if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA)
                 val |= 0x04;
             *q++ = val;
             *q++ = flags;
@@ -927,16 +1253,34 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
             }
             if (pes_extension && st->codec->codec_id == AV_CODEC_ID_DIRAC) {
                 flags = 0x01;  /* set PES_extension_flag_2 */
-                *q++ = flags;
-                *q++ = 0x80 | 0x01;  /* marker bit + extension length */
-                /*
-                * Set the stream id extension flag bit to 0 and
-                * write the extended stream id
-                */
+                *q++  = flags;
+                *q++  = 0x80 | 0x01; /* marker bit + extension length */
+                /* Set the stream ID extension flag bit to 0 and
+                 * write the extended stream ID. */
                 *q++ = 0x00 | 0x60;
             }
-            if (private_code != 0)
-                *q++ = private_code;
+            /* For Blu-ray AC3 Audio Setting extended flags */
+          if (ts->m2ts_mode &&
+              pes_extension &&
+              st->codec->codec_id == AV_CODEC_ID_AC3) {
+                      flags = 0x01; /* set PES_extension_flag_2 */
+                      *q++ = flags;
+                      *q++ = 0x80 | 0x01; /* marker bit + extension length */
+                      *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
+              }
+
+
+            if (is_dvb_subtitle) {
+                /* First two fields of DVB subtitles PES data:
+                 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
+                 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
+                *q++ = 0x20;
+                *q++ = 0x00;
+            }
+            if (is_dvb_teletext) {
+                memset(q, 0xff, pes_header_stuffing_bytes);
+                q += pes_header_stuffing_bytes;
+            }
             is_start = 0;
         }
         /* header size */
@@ -960,86 +1304,186 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
                 /* add stuffing */
                 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
                 buf[3] |= 0x20;
-                buf[4] = stuffing_len - 1;
+                buf[4]  = stuffing_len - 1;
                 if (stuffing_len >= 2) {
                     buf[5] = 0x00;
                     memset(buf + 6, 0xff, stuffing_len - 2);
                 }
             }
         }
-        memcpy(buf + TS_PACKET_SIZE - len, payload, len);
-        payload += len;
+
+        if (is_dvb_subtitle && payload_size == len) {
+            memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
+            buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
+        } else {
+            memcpy(buf + TS_PACKET_SIZE - len, payload, len);
+        }
+
+        payload      += len;
         payload_size -= len;
+        mpegts_prefix_m2ts_header(s);
         avio_write(s->pb, buf, TS_PACKET_SIZE);
     }
-    avio_flush(s->pb);
+    ts_st->prev_payload_key = key;
+}
+
+int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
+{
+    if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
+        if (!st->nb_frames) {
+            av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
+                   "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
+                   "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
+            return AVERROR_INVALIDDATA;
+        }
+        av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
+        if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
+        av_log(s, AV_LOG_WARNING, "\n");
+    }
+    return 0;
+}
+
+static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
+{
+    if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
+        if (!st->nb_frames) {
+            av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
+            return AVERROR_PATCHWELCOME;
+        }
+        av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
+        if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
+        av_log(s, AV_LOG_WARNING, "\n");
+    }
+    return 0;
+}
+
+/* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
+ * Released under the LGPL v2.1+, written by
+ * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
+ */
+static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
+{
+    static const int durations[32] = {
+      480, 960, 1920, 2880,       /* Silk NB */
+      480, 960, 1920, 2880,       /* Silk MB */
+      480, 960, 1920, 2880,       /* Silk WB */
+      480, 960,                   /* Hybrid SWB */
+      480, 960,                   /* Hybrid FB */
+      120, 240, 480, 960,         /* CELT NB */
+      120, 240, 480, 960,         /* CELT NB */
+      120, 240, 480, 960,         /* CELT NB */
+      120, 240, 480, 960,         /* CELT NB */
+    };
+    int toc, frame_duration, nframes, duration;
+
+    if (pkt->size < 1)
+        return 0;
+
+    toc = pkt->data[0];
+
+    frame_duration = durations[toc >> 3];
+    switch (toc & 3) {
+    case 0:
+        nframes = 1;
+        break;
+    case 1:
+        nframes = 2;
+        break;
+    case 2:
+        nframes = 2;
+        break;
+    case 3:
+        if (pkt->size < 2)
+            return 0;
+        nframes = pkt->data[1] & 63;
+        break;
+    }
+
+    duration = nframes * frame_duration;
+    if (duration > 5760) {
+        av_log(s, AV_LOG_WARNING,
+               "Opus packet duration > 120 ms, invalid");
+        return 0;
+    }
+
+    return duration;
 }
 
 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
 {
     AVStream *st = s->streams[pkt->stream_index];
     int size = pkt->size;
-    uint8_t *buf= pkt->data;
-    uint8_t *data= NULL;
+    uint8_t *buf = pkt->data;
+    uint8_t *data = NULL;
     MpegTSWrite *ts = s->priv_data;
     MpegTSWriteStream *ts_st = st->priv_data;
-    const uint64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE)*2;
-    int64_t dts = AV_NOPTS_VALUE, pts = AV_NOPTS_VALUE;
+    const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
+    int64_t dts = pkt->dts, pts = pkt->pts;
+    int opus_samples = 0;
 
     if (ts->reemit_pat_pmt) {
-        av_log(s, AV_LOG_WARNING, "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
+        av_log(s, AV_LOG_WARNING,
+               "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
         ts->reemit_pat_pmt = 0;
-        ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
+        ts->flags         |= MPEGTS_FLAG_REEMIT_PAT_PMT;
     }
 
     if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
         ts->pat_packet_count = ts->pat_packet_period - 1;
         ts->sdt_packet_count = ts->sdt_packet_period - 1;
-        ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
+        ts->flags           &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
     }
 
-    if (pkt->pts != AV_NOPTS_VALUE)
-        pts = pkt->pts + delay;
-    if (pkt->dts != AV_NOPTS_VALUE)
-        dts = pkt->dts + delay;
+    if (ts->copyts < 1) {
+        if (pts != AV_NOPTS_VALUE)
+            pts += delay;
+        if (dts != AV_NOPTS_VALUE)
+            dts += delay;
+    }
 
     if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
-        av_log(s, AV_LOG_ERROR, "first pts value must set\n");
-        return AVERROR(EINVAL);
+        av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
+        return AVERROR_INVALIDDATA;
     }
     ts_st->first_pts_check = 0;
 
     if (st->codec->codec_id == AV_CODEC_ID_H264) {
-        const uint8_t *p = buf, *buf_end = p+size;
+        const uint8_t *p = buf, *buf_end = p + size;
         uint32_t state = -1;
+        int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codec->extradata_size : 0;
+        int ret = ff_check_h264_startcode(s, st, pkt);
+        if (ret < 0)
+            return ret;
 
-        if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
-            av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
-                   "no startcode found, use -bsf h264_mp4toannexb\n");
-            return AVERROR(EINVAL);
-        }
+        if (extradd && AV_RB24(st->codec->extradata) > 1)
+            extradd = 0;
 
         do {
             p = avpriv_find_start_code(p, buf_end, &state);
-            av_dlog(s, "nal %d\n", state & 0x1f);
+            av_log(s, AV_LOG_TRACE, "nal %d\n", state & 0x1f);
+            if ((state & 0x1f) == 7)
+                extradd = 0;
         } while (p < buf_end && (state & 0x1f) != 9 &&
                  (state & 0x1f) != 5 && (state & 0x1f) != 1);
 
+        if ((state & 0x1f) != 5)
+            extradd = 0;
         if ((state & 0x1f) != 9) { // AUD NAL
-            data = av_malloc(pkt->size+6);
+            data = av_malloc(pkt->size + 6 + extradd);
             if (!data)
                 return AVERROR(ENOMEM);
-            memcpy(data+6, pkt->data, pkt->size);
+            memcpy(data + 6, st->codec->extradata, extradd);
+            memcpy(data + 6 + extradd, pkt->data, pkt->size);
             AV_WB32(data, 0x00000001);
             data[4] = 0x09;
             data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
-            buf  = data;
-            size = pkt->size+6;
+            buf     = data;
+            size    = pkt->size + 6 + extradd;
         }
     } else if (st->codec->codec_id == AV_CODEC_ID_AAC) {
         if (pkt->size < 2) {
             av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
-            return AVERROR(EINVAL);
+            return AVERROR_INVALIDDATA;
         }
         if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
             int ret;
@@ -1047,60 +1491,153 @@ static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
 
             if (!ts_st->amux) {
                 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
-                       "and extradata missing\n");
-                return AVERROR(EINVAL);
-            }
-
+                                        "and extradata missing\n");
+                if (!st->nb_frames)
+                    return AVERROR_INVALIDDATA;
+            } else {
             av_init_packet(&pkt2);
             pkt2.data = pkt->data;
             pkt2.size = pkt->size;
+            av_assert0(pkt->dts != AV_NOPTS_VALUE);
+            pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
+
             ret = avio_open_dyn_buf(&ts_st->amux->pb);
             if (ret < 0)
                 return AVERROR(ENOMEM);
 
             ret = av_write_frame(ts_st->amux, &pkt2);
             if (ret < 0) {
-                avio_close_dyn_buf(ts_st->amux->pb, &data);
-                ts_st->amux->pb = NULL;
-                av_free(data);
+                ffio_free_dyn_buf(&ts_st->amux->pb);
                 return ret;
             }
-            size = avio_close_dyn_buf(ts_st->amux->pb, &data);
+            size            = avio_close_dyn_buf(ts_st->amux->pb, &data);
             ts_st->amux->pb = NULL;
-            buf = data;
+            buf             = data;
+            }
+        }
+    } else if (st->codec->codec_id == AV_CODEC_ID_HEVC) {
+        int ret = check_hevc_startcode(s, st, pkt);
+        if (ret < 0)
+            return ret;
+    } else if (st->codec->codec_id == AV_CODEC_ID_OPUS) {
+        if (pkt->size < 2) {
+            av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
+            return AVERROR_INVALIDDATA;
+        }
+
+        /* Add Opus control header */
+        if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
+            uint8_t *side_data;
+            int side_data_size;
+            int i, n;
+            int ctrl_header_size;
+            int trim_start = 0, trim_end = 0;
+
+            opus_samples = opus_get_packet_samples(s, pkt);
+
+            side_data = av_packet_get_side_data(pkt,
+                                                AV_PKT_DATA_SKIP_SAMPLES,
+                                                &side_data_size);
+
+            if (side_data && side_data_size >= 10) {
+                trim_end = AV_RL32(side_data + 4) * 48000 / st->codec->sample_rate;
+            }
+
+            ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
+            if (ts_st->opus_pending_trim_start)
+              ctrl_header_size += 2;
+            if (trim_end)
+              ctrl_header_size += 2;
+
+            data = av_malloc(ctrl_header_size);
+            if (!data)
+                return AVERROR(ENOMEM);
+
+            data[0] = 0x7f;
+            data[1] = 0xe0;
+            if (ts_st->opus_pending_trim_start)
+                data[1] |= 0x10;
+            if (trim_end)
+                data[1] |= 0x08;
+
+            n = pkt->size;
+            i = 2;
+            do {
+                data[i] = FFMIN(n, 255);
+                n -= 255;
+                i++;
+            } while (n >= 0);
+
+            av_assert0(2 + pkt->size / 255 + 1 == i);
+
+            if (ts_st->opus_pending_trim_start) {
+                trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
+                AV_WB16(data + i, trim_start);
+                i += 2;
+                ts_st->opus_pending_trim_start -= trim_start;
+            }
+            if (trim_end) {
+                trim_end = FFMIN(trim_end, opus_samples - trim_start);
+                AV_WB16(data + i, trim_end);
+                i += 2;
+            }
+
+            memcpy(data + i, pkt->data, pkt->size);
+            buf     = data;
+            size    = ctrl_header_size;
+        } else {
+            /* TODO: Can we get TS formatted data here? If so we will
+             * need to count the samples of that too! */
+            av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
         }
     }
 
-    if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
+    if (pkt->dts != AV_NOPTS_VALUE) {
+        int i;
+        for(i=0; i<s->nb_streams; i++) {
+            AVStream *st2 = s->streams[i];
+            MpegTSWriteStream *ts_st2 = st2->priv_data;
+            if (   ts_st2->payload_size
+               && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
+                mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
+                                ts_st2->payload_pts, ts_st2->payload_dts,
+                                ts_st2->payload_flags & AV_PKT_FLAG_KEY);
+                ts_st2->payload_size = 0;
+            }
+        }
+    }
+
+    if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
+        (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
+         av_compare_ts(dts - ts_st->payload_dts, st->time_base,
+                       s->max_delay, AV_TIME_BASE_Q) >= 0) ||
+        ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
+        mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
+                         ts_st->payload_pts, ts_st->payload_dts,
+                         ts_st->payload_flags & AV_PKT_FLAG_KEY);
+        ts_st->payload_size = 0;
+        ts_st->opus_queued_samples = 0;
+    }
+
+    if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
+        av_assert0(!ts_st->payload_size);
         // for video and subtitle, write a single pes packet
-        mpegts_write_pes(s, st, buf, size, pts, dts, pkt->flags & AV_PKT_FLAG_KEY);
+        mpegts_write_pes(s, st, buf, size, pts, dts,
+                         pkt->flags & AV_PKT_FLAG_KEY);
+        ts_st->opus_queued_samples = 0;
         av_free(data);
         return 0;
     }
 
-    if (ts_st->payload_size + size > ts->pes_payload_size) {
-        if (ts_st->payload_size) {
-            mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
-                             ts_st->payload_pts, ts_st->payload_dts,
-                             ts_st->payload_flags & AV_PKT_FLAG_KEY);
-            ts_st->payload_size = 0;
-        }
-        if (size > ts->pes_payload_size) {
-            mpegts_write_pes(s, st, buf, size, pts, dts,
-                             pkt->flags & AV_PKT_FLAG_KEY);
-            av_free(data);
-            return 0;
-        }
-    }
-
     if (!ts_st->payload_size) {
-        ts_st->payload_pts = pts;
-        ts_st->payload_dts = dts;
+        ts_st->payload_pts   = pts;
+        ts_st->payload_dts   = dts;
         ts_st->payload_flags = pkt->flags;
     }
 
     memcpy(ts_st->payload + ts_st->payload_size, buf, size);
     ts_st->payload_size += size;
+    ts_st->opus_queued_samples += opus_samples;
 
     av_free(data);
 
@@ -1112,7 +1649,7 @@ static void mpegts_write_flush(AVFormatContext *s)
     int i;
 
     /* flush current packets */
-    for(i = 0; i < s->nb_streams; i++) {
+    for (i = 0; i < s->nb_streams; i++) {
         AVStream *st = s->streams[i];
         MpegTSWriteStream *ts_st = st->priv_data;
         if (ts_st->payload_size > 0) {
@@ -1120,9 +1657,9 @@ static void mpegts_write_flush(AVFormatContext *s)
                              ts_st->payload_pts, ts_st->payload_dts,
                              ts_st->payload_flags & AV_PKT_FLAG_KEY);
             ts_st->payload_size = 0;
+            ts_st->opus_queued_samples = 0;
         }
     }
-    avio_flush(s->pb);
 }
 
 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
@@ -1141,9 +1678,10 @@ static int mpegts_write_end(AVFormatContext *s)
     MpegTSService *service;
     int i;
 
-    mpegts_write_flush(s);
+    if (s->pb)
+        mpegts_write_flush(s);
 
-    for(i = 0; i < s->nb_streams; i++) {
+    for (i = 0; i < s->nb_streams; i++) {
         AVStream *st = s->streams[i];
         MpegTSWriteStream *ts_st = st->priv_data;
         av_freep(&ts_st->payload);
@@ -1153,28 +1691,121 @@ static int mpegts_write_end(AVFormatContext *s)
         }
     }
 
-    for(i = 0; i < ts->nb_services; i++) {
+    for (i = 0; i < ts->nb_services; i++) {
         service = ts->services[i];
         av_freep(&service->provider_name);
         av_freep(&service->name);
-        av_free(service);
+        av_freep(&service);
     }
-    av_free(ts->services);
+    av_freep(&ts->services);
 
     return 0;
 }
 
+static const AVOption options[] = {
+    { "mpegts_transport_stream_id", "Set transport_stream_id field.",
+      offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
+      { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
+    { "mpegts_original_network_id", "Set original_network_id field.",
+      offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
+      { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
+    { "mpegts_service_id", "Set service_id field.",
+      offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
+      { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
+    { "mpegts_service_type", "Set service_type field.",
+      offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
+      { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
+    { "digital_tv", "Digital Television.",
+      0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
+    { "digital_radio", "Digital Radio.",
+      0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
+    { "teletext", "Teletext.",
+      0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
+    { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
+      0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
+    { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
+      0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
+    { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
+      0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
+    { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
+      0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
+    { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
+      offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
+      { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
+    { "mpegts_start_pid", "Set the first pid.",
+      offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
+      { .i64 = 0x0100 }, 0x0020, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
+    { "mpegts_m2ts_mode", "Enable m2ts mode.",
+      offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
+      { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
+    { "muxrate", NULL,
+      offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
+      { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+    { "pes_payload_size", "Minimum PES packet payload in bytes",
+      offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
+      { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+    { "mpegts_flags", "MPEG-TS muxing flags",
+      offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
+    { "resend_headers", "Reemit PAT/PMT before writing the next packet",
+      0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
+    { "latm", "Use LATM packetization for AAC",
+      0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
+    { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
+      0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
+      AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
+    // backward compatibility
+    { "resend_headers", "Reemit PAT/PMT before writing the next packet",
+      offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
+      { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+    { "mpegts_copyts", "don't offset dts/pts",
+      offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
+      { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
+    { "tables_version", "set PAT, PMT and SDT version",
+      offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
+      { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
+    { "omit_video_pes_length", "Omit the PES packet length for video packets",
+      offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
+      { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
+    { "pcr_period", "PCR retransmission time",
+      offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
+      { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+    { "pat_period", "PAT/PMT retransmission time limit in seconds",
+      offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
+      { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+    { "sdt_period", "SDT retransmission time limit in seconds",
+      offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
+      { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+    { NULL },
+};
+
+static const AVClass mpegts_muxer_class = {
+    .class_name = "MPEGTS muxer",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
 AVOutputFormat ff_mpegts_muxer = {
-    .name              = "mpegts",
-    .long_name         = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
-    .mime_type         = "video/x-mpegts",
-    .extensions        = "ts,m2t",
-    .priv_data_size    = sizeof(MpegTSWrite),
-    .audio_codec       = AV_CODEC_ID_MP2,
-    .video_codec       = AV_CODEC_ID_MPEG2VIDEO,
-    .write_header      = mpegts_write_header,
-    .write_packet      = mpegts_write_packet,
-    .write_trailer     = mpegts_write_end,
-    .flags             = AVFMT_ALLOW_FLUSH,
-    .priv_class        = &mpegts_muxer_class,
+    .name           = "mpegts",
+    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
+    .mime_type      = "video/MP2T",
+    .extensions     = "ts,m2t,m2ts,mts",
+    .priv_data_size = sizeof(MpegTSWrite),
+    .audio_codec    = AV_CODEC_ID_MP2,
+    .video_codec    = AV_CODEC_ID_MPEG2VIDEO,
+    .write_header   = mpegts_write_header,
+    .write_packet   = mpegts_write_packet,
+    .write_trailer  = mpegts_write_end,
+    .flags          = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS,
+    .priv_class     = &mpegts_muxer_class,
 };