On Fri, 30 Sep 2022, Zhao Zhili wrote:
From: Zhao Zhili <zhiliz...@tencent.com>
Add PCR at keyframe can be undesirable when -pcr_period is
specified. Add an flag to disable this behavior.
Signed-off-by: Zhao Zhili <zhiliz...@tencent.com>
---
v2: change pcr_at_keyframe to omit_rai
LGTM with libavformat micro version bump, thanks.
Marton
doc/muxers.texi | 2 ++
libavformat/mpegtsenc.c | 6 +++++-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/doc/muxers.texi b/doc/muxers.texi
index b2f4326aae..4edbb22b00 100644
--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -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}
diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index 5148a6aecd..48d39e6a7d 100644
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -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",
--
2.25.1
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