Hi guys. I used search, but didnt find anything about this.
I'm using pjproject 1.4.5. Looks like after remote side makes hold/resume,
local sequence number for rtp packets is reset. I've investigated the
problem a little bit.
In pjsua_media.c :
static void stop_media_session(pjsua_call_id call_id)
{
...
if (pjmedia_session_get_stream_stat(call->session, 0, &stat)
== PJ_SUCCESS)
{
/* Save RTP timestamp & sequence, so when media session is
* restarted, those values will be restored as the initial
* RTP timestamp & sequence of the new media session. So in
* the same call session, RTP timestamp and sequence are
* guaranteed to be contigue.
*/
call->rtp_tx_seq_ts_set = 1 | (1 << 1);
call->rtp_tx_seq = stat.rtp_tx_last_seq;
call->rtp_tx_ts = stat.rtp_tx_last_ts;
}
If remote side makes hold, this code is called twice. First time everyting
is ok, but second time stat.rtp_tx_last_seq == 0. So after resume next
sequence of rtp packet will be 0 too.
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