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avformat/mpegtsenc: add omit_rai flag 

Add PCR at keyframe can be undesirable when -pcr_period is
specified. Add an flag to disable this behavior.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
This commit is contained in:
Zhao Zhili 2022-09-30 02:00:31 +08:00
parent ba30744213
commit 2205ccd216
3 changed files with 8 additions and 2 deletions
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2
doc/muxers.texi
View File

@ -1915,6 +1915,8 @@ Conform to System B (DVB) instead of System A (ATSC).
Mark the initial packet of each stream as discontinuity.
@item nit
Emit NIT table.
@item omit_rai
Disable writing of random access indicator.
@end table
@item mpegts_copyts @var{boolean}

6
libavformat/mpegtsenc.c
View File

@ -112,6 +112,7 @@ typedef struct MpegTSWrite {
#define MPEGTS_FLAG_SYSTEM_B 0x08
#define MPEGTS_FLAG_DISCONT 0x10
#define MPEGTS_FLAG_NIT 0x20
#define MPEGTS_FLAG_OMIT_RAI 0x40
int flags;
int copyts;
int tables_version;
@ -1566,7 +1567,8 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
q = get_ts_payload_start(buf);
ts_st->discontinuity = 0;
}
if (key && is_start && pts != AV_NOPTS_VALUE &&
if (!(ts->flags & MPEGTS_FLAG_OMIT_RAI) &&
key && is_start && pts != AV_NOPTS_VALUE &&
!is_dvb_teletext /* adaptation+payload forbidden for teletext (ETSI EN 300 472 V1.3.1 4.1) */) {
// set Random Access for key frames
if (ts_st->pcr_period)
@ -2282,6 +2284,8 @@ static const AVOption options[] = {
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX, ENC, "mpegts_flags" },
{ "nit", "Enable NIT transmission",
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_NIT}, 0, INT_MAX, ENC, "mpegts_flags" },
{ "omit_rai", "Disable writing of random access indicator",
0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_OMIT_RAI }, 0, INT_MAX, ENC, "mpegts_flags" },
{ "mpegts_copyts", "don't offset dts/pts", OFFSET(copyts), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, ENC },
{ "tables_version", "set PAT, PMT, SDT and NIT version", OFFSET(tables_version), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 31, ENC },
{ "omit_video_pes_length", "Omit the PES packet length for video packets",

2
libavformat/version.h
View File

@ -32,7 +32,7 @@
#include "version_major.h"
#define LIBAVFORMAT_VERSION_MINOR 34
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_MICRO 101
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \