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[Linphone-developers] mediastreamer stutter for dropped UDP packets

From: Craig McQueen
Subject: [Linphone-developers] mediastreamer stutter for dropped UDP packets
Date: Wed, 8 May 2013 07:28:47 +0000

I'm using mediastreamer v2.0.0 with a voice application in a Wi-Fi network. It's working fairly well in nominal operation, however...

When the received Wi-Fi signal is weak so that incoming packets are going missing, we hear a "stuttering" which sounds as though the last received packet may be being repeated over and over again, for several seconds. I would rather that it doesn't repeat the last packet indefinitely, which sounds bad, but just goes silent instead.

I found this:

which made me think perhaps using a zero value for the jitt_comp parameter of audio_stream_start_with_sndcards() could cause this behaviour. And using a non-zero value should prevent such endless repeating of the last received packet. So I tried values of 20 and 200 for the jitt_comp parameter. But that doesn't seem to make a difference.

Is there some way to control the way mediastreamer behaves regarding missing UDP packets?

Also, is there some way to get status on missing packets?

Craig McQueen

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