Video lag

Asterisk Asterisk Support
1

Hi,
As i have no chance on IRC I will try here…
I have an audio/video communication through Asterisk 11.7 using G711 and H264. With an old version of a peer I have no problem but with a new one, I have a lot of lag on the video, audio is ok.
I have done a tcpdump and when I look at the rtp packet, i can see that the PPS, SPS and SSRC are changed between the 2 legs on video but not on audio.

Here an extract from tcpdump which describe the problem on video:

4195	37.948480	82.34.74.33	48.102.37.35	H264	63	PT=H264, SSRC=0x15C5673, Seq=0, Time=9000 NAL unit - Sequence parameter set
4196	37.948511	82.34.74.33	48.102.37.35	H264	60	PT=H264, SSRC=0x15C5673, Seq=1, Time=9000 NAL unit - Picture parameter set
4197	37.949560	82.34.74.33	48.102.37.35	H264	571	PT=H264, SSRC=0x15C5673, Seq=2, Time=9000 NAL unit - Coded slice of an IDR picture
...
4513	39.130015	82.34.74.33	48.102.37.35	H264	593	PT=H264, SSRC=0x15C5673, Seq=91, Time=117000 NAL unit - Coded slice of a non-IDR picture
4514	39.130175	48.102.37.35	90.15.35.165	H264	593	PT=H264, SSRC=0x27837A17, Seq=14299, Time=108000 NAL unit - Coded slice of a non-IDR picture
4518	39.130620	48.102.37.35	90.15.35.165	H264	783	PT=H264, SSRC=0x27837A17, Seq=14300, Time=108000 NAL unit - Coded slice of a non-IDR picture

And the audio extraction:

4210	37.984291	90.15.35.165	48.102.37.35	RTP	214	PT=ITU-T G.711 PCMA, SSRC=0xB965895, Seq=0, Time=18240
4211	37.984445	48.102.37.35	82.34.74.33	RTP	214	PT=ITU-T G.711 PCMA, SSRC=0xB965895, Seq=0, Time=18240, Mark

I’m not sure my problems come from here but why audio is pass through but not the video?
I have made no change on Asterisk so what kind of parameter can affect the peer to decode?

Any help would be appreciate.

2

No ideas?