[X2Go-Dev] PulseAudio (ATTN: @Jan Wagner & @Stephan Diehl)

[Stephan Diehl]

On Holiday until 18.6. I have to Test it later.

Stephan

Von meinem iPhone gesendet

Am 30.05.2012 um 03:09 schrieb Stefan Baur <newsgroups.mail2 at stefanbaur.de>:

> Am 30.05.2012 08:32, schrieb Mihai Moldovan:
> 
>>> A better test is: run the pavucontrol tool within the X2Go session and test if
>>> the PA process on the MAC survives all the PA-specific mixer and volume meter
>>> API calls.
>> 
>> WORKSFORME... it seems to work fine on my Debian Unstable based remote server.
>> I'll guess I'll have Stefan test on (older) Ubuntu boxes and stuff, if he's up to.
> 
> No can do. I can test against a Debian Squeeze server with X2Go's stable packages, though.
> 
> [...]
> 
>> I do have some other issues, though. Especially when starting a flash video in
>> Iceweasel, sound is choppy, distorted, (<  buffer underruns?) the video will halt
>> a few seconds in-play, sound will roll on for like 20 seconds, then stop, video
>> catch up fast and once the video has reached the sound position, both video and
>> sound playback will pick up again, but sound and picture will be desynchronized
>> as the sound makes a 20 seconds jump into the "future".
>> 
>> This is a very odd behavior, but I'm not sure what to make of it.
> 
> Our old friend Nagle?
> 
>> I have noticed problems when running pavucontrol and mplayer both at the same
>> time, though.
> 
> What kind of problems?
> 
>> But I figure both the pavucontrol+mplayer and flash video problems are due to
>> the remote ADSL connection. I see a peak incoming traffic of about 250KB/s,
>> hardly enough for both sound and video. Another circumstance that may well
>> confirm this theory is that lowering the image quality (i.e., set to JPEG
>> compression with 64 colors) has a positive effect on the sound output.
> 
> Do we have some sort of rough estimate how much bandwidth we need for which color depth?
> 
> And would it be possible to lower the sound quality to conserve some bandwidth? I mean, it's rather unlikely somebody is going to expect Dolby 5.1 sound quality via GSM... ;-)
> 
>> I'd really be interested to see tests on LAN, but unfortunately my only other
>> box has no PA installed and I don't want to pollute the system with it. However,
>> I guess that Stefan could come in here handy.
> 
> I'll give it a try, but I'm not really a Mac user (I bought this Mac solely to support X2Go development for Mac), so Jan and Stephan should join in if you want reliable results.
> 
>> The code is not yet ready and I still have to tackle the esound emulation stuff,
>> but I'd be happy to dump a test build here. Is anyone interested? Let me know.
> 
> Jan, Stephan, your call!
> 
> -Stefan
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