Unstable video/audio, depending of the environments


Hello !

I resolved all majors problems relatives to conferences in my environments, now I’m trying to improve the quality of the conferences (really poor in some environments).

First, I tried to have a conference with 5-6 person in Jitsi Meet exemple servers, it was perfect, no connection drop, no problem.

Then, I tried the same experience in some of my environments. In all of them, there was more or less some connectivity issues, black screens, connection losses etc…

Please find here the main errors I found in jvb.log during these sessions :

WARNING: SCTP connection with 14583068 not ready yet.
WARNING: No available transport channel, can't send a message
WARNING: A jump was detected in the picture IDs.
WARNING: Probe packet received: send time=22875 ms, recv time=1536765975064 ms, send delta=-1 ms, recv delta=-1 ms.
WARNING: Probe failed, sent at 1.04368E8 bps, received at 5.2184E7 bps. Mean send delta: 0.09090909090909091 ms, mean recv delta: 0.18181818181818182 ms, num probes: 11
WARNING: Cannot find SSRC for RTX, retransmitting plain. SSRC=924033984
WARNING: Unknown DTLS handshake message type: -93
WARNING: Cannot find SSRC for RTX, retransmitting plain. SSRC=3034771701
WARNING: invalid_rtt,stream=1563961509 ssrc=924033984,rtt=4739,now=1536766090033,lsr=2936358961,dlsr=721
WARNING: Packets dropped (hashCode=1450581955): 14000
WARNING: RTT not calculated, or has a suspiciously high value (2228). Using the default of 100ms.

These errors happens randomly without explicit reasons. When they starts, the conference quality also starts to drop.

Please let me know if you have any information on these errors.

Also, it there any server requirements to know if my set up is good or any test (iPerf) you could recommend to me ?

Thanks for your help !