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| author | Fred Rothganger <frothga@sandia.gov> | 2014-03-11 17:58:34 -0600 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-03-12 13:33:14 +0100 |
| commit | 3f3229cd109f5cdf1f1d6fe26f2864e32e029b53 (patch) | |
| tree | 4d0a2895c5ac1e1e3fc529a439f6b5d1b1ba6790 /libavformat/rtsp.c | |
| parent | 581957cd8618f07d824da1b9f6ae1c97531b03ab (diff) | |
| download | ffmpeg-3f3229cd109f5cdf1f1d6fe26f2864e32e029b53.tar.gz | |
avformat: extracting NTP timestamp from RTCP
For muxing, it accepts
both 0 and AV_NOPTS_VALUE. For demuxing, it will present
AV_NOPTS_VALUE when start_time_realtime is unknown.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavformat/rtsp.c')
| -rw-r--r-- | libavformat/rtsp.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c index d89af626da..fcf9eca0d4 100644 --- a/libavformat/rtsp.c +++ b/libavformat/rtsp.c @@ -2071,6 +2071,16 @@ redo: st2->time_base); } } + // Make real NTP start time available in AVFormatContext + if (s->start_time_realtime == AV_NOPTS_VALUE) { + s->start_time_realtime = av_rescale (rtpctx->first_rtcp_ntp_time - (NTP_OFFSET << 32), 1000000, 1LL << 32); + if (rtpctx->st) { + s->start_time_realtime -= + av_rescale (rtpctx->rtcp_ts_offset, + (uint64_t) rtpctx->st->time_base.num * 1000000, + rtpctx->st->time_base.den); + } + } } if (ret == -RTCP_BYE) { rt->nb_byes++; |