The question can be answered: No, we do not know the initial sequence
number from the SDP. In certain cases, it can be known from the
RTP-Info response header in RTSP though. (In that case, we use it as
timestamp origin, but not for rtp receiver statistics.)
---
libavformat/rtpdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavformat/rtpdec.c b/libavformat/rtpdec.c
index 9734ecf..9cc53e2 100644
--- a/libavformat/rtpdec.c
+++ b/libavformat/rtpdec.c
@@ -482,7 +482,7 @@ RTPDemuxContext *ff_rtp_parse_open(AVFormatContext *s1,
AVStream *st,
s->ic = s1;
s->st = st;
s->queue_size = queue_size;
- rtp_init_statistics(&s->statistics, 0); // do we know the initial sequence
from sdp?
+ rtp_init_statistics(&s->statistics, 0);
if (!strcmp(ff_rtp_enc_name(payload_type), "MP2T")) {
s->ts = ff_mpegts_parse_open(s->ic);
if (s->ts == NULL) {
--
1.7.9.4
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