Timestamp difference is available in media timebase (1/90K) where as
rtcp time is in the default microseconds timebase. This patch fixes
the calculated prft wallclock time by rescaling the timestamp delta
to the microseconds timebase.
---
libavformat/rtpdec.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/libavformat/rtpdec.c b/libavformat/rtpdec.c
index b935dba1b8..21c1d01785 100644
--- a/libavformat/rtpdec.c
+++ b/libavformat/rtpdec.c
@@ -585,14 +585,19 @@ void ff_rtp_parse_set_crypto(RTPDemuxContext *s, const
char *suite,
}
static int rtp_set_prft(RTPDemuxContext *s, AVPacket *pkt, uint32_t timestamp)
{
+ int64_t rtcp_time, delta_timestamp, delta_time;
+
AVProducerReferenceTime *prft =
(AVProducerReferenceTime *) av_packet_new_side_data(
pkt, AV_PKT_DATA_PRFT, sizeof(AVProducerReferenceTime));
if (!prft)
return AVERROR(ENOMEM);
- prft->wallclock = ff_parse_ntp_time(s->last_rtcp_ntp_time) - NTP_OFFSET_US
+
- timestamp - s->last_rtcp_timestamp;
+ rtcp_time = ff_parse_ntp_time(s->last_rtcp_ntp_time) - NTP_OFFSET_US;
+ delta_timestamp = (int64_t)timestamp - (int64_t)s->last_rtcp_timestamp;
+ delta_time = av_rescale_q(delta_timestamp, s->st->time_base,
AV_TIME_BASE_Q);
+
+ prft->wallclock = rtcp_time + delta_time;
prft->flags = 24;
return 0;
}
--
2.25.1
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