audio chopped after running for several hours

[Paixao Julien]

Hi,

Would you have any hints regarding my point below?

 > I am now using a network emulator between Device1 and Device2.
> The IP packets from Device1 to Device2 are first going to the network
> emulator.
> 
> With this network emulator I can simulate some network effects.
> One of them is the jitter and indeed by adding jitter on the line I start to have
> choppy audio since the pipeline of Device2 does not contain a jitter buffer
> before the depayloader.
> 
> I have also played with the delay parameter, a fixed delay is applied to each
> packet from Device1 to Device2.
> I have tried a delay of 500ms, 1s and 2s.
> Let's visualize the situation with a delay of 500ms:
> Device1 -> Sends RTP packet1 at 0ms   ---------------  Device2 -> Receives RTP
> packet1 after 500ms
> Device1 -> Sends RTP packet2 at 16ms ---------------  Device2 -> Receives RTP
> packet2 after 516ms
> Device1 -> Sends RTP packet3 at 16ms ---------------  Device2 -> Receives RTP
> packet3 after 532ms ...
> 
> In that situation, seeing my Device2 pipeline, I would expect that all the
> packets arriving in Device2 would be dropped by the alsasink since max-
> lateness is set to 100ms.
> But the audio on Device2 still plays smoothly, I do not understand that, it
> looks like the timestamp in the RTP packets is not used...
> Would you have any ideas why?
> 

Best regards,
Julien.