[Bug 96208] Audio lag issue in large bandwidth network

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96208

--- Comment #2 from Dharmesh <dharmesh4u at live.com> ---
(In reply to Victor Toso from comment #1)
> (In reply to Dharmesh from comment #0)
> > Hello,
> > 
> > I am using aSpice client installed on custom Android device with dual core
> > processor and 1 GB RAM. I have both Ethernet and WiFi network interface.
> > 
> > Spice server(0.12.7) and Qemu configured in Ubuntu(14) Linux machine. The VM
> > guest OS(Buildroot) plays SWF flash animation file with audio.
> > 
> > I have faced audio lag issue about around 1 second through Ethernet and for
> > different routers with Higher bandwidth.
> > 
> > In some routers, I have got audio sync and all things work perfect.
> 
> I don't really think the problem is the network but the audio decoding.
> 
> > I have checked VM logs and found that the low bandwidth messages for routers
> > which work for me while others have higher bandwidth values.
> 
> How cool is that? With lower bandwith the audio works! In the code I can see
> on sound.c:
> 
> > delay_val = main_channel_client_is_low_bandwidth(mcc) ? 0 : 1; 
> > if (setsockopt(stream->socket, IPPROTO_TCP, TCP_NODELAY, &delay_val, sizeof(delay_val)) == -1) {
> ...
> 
> But I don't really think it would be related to your problem.
> 
> > I have checked same behavior in Samsung Galaxy Note-II phone. 
> > 
> > Can any one help me to solve this issue??
> 
> I have played with real-time audio decoding on Android and I got really
> frustrated with the outcome. That was 3 years ago so I hope it is much
> better now. That being aSpice is not really maintained by us so I'm not sure
> how we can help with this client.
> 
> If this client is based on spice-gtk, one could play with SPICE_DISABLE_CELT
> or SPICE_DISABLE_OPUS but I'm not aware of other ways to change audio
> configuration.

Thanks for reply.

In Virtual manager(in Ubuntu OS) client, I never faced any audio lag issue and
everything works perfect in it. 

Yes in Android device, client is based on spice-gtk and it uses gstreamer.
SPICE_DISABLE_CELT and SPICE_DISABLE_OPUS flags are already set to true. 

Do I need to try celt for audio instead gstreamer?

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