Hello,
I've done differents tests, with the differents combinaisons between qemu X and spice-server,
I can say that is since video adaptative streaming, the video streaming is bad compare to the old version (spice 0.12.3 / qemu 1.7 ).
When i set SPICE_DISABLE_ADAPTIVE_STREAMING=Y , my tests shows that's a lot of frames are dropping, because of sound synchronisation, The only way to get good streaming performance is to desactivate audio from client side. ( --spice-disable-audio).
An other point, when you disable streaming detection from server side, video is good, but the sound is very bad.
Regards,
Nicolas
2014-09-08 16:57 GMT+02:00 Jeremy White <jwhite@xxxxxxxxxxxxxxx>:
On Sat, Sep 06, 2014 at 08:59:47AM -0500, Jeremy White wrote:
I think there actually is the same issue when running within QEMU: sound
is emitted from a QEMU thread:
Is there a bug or someone that is working on that issue? I'd be curious to
see if my patch resolves the problem for them.
I've only noticed this through code inspection/gdb breakpoints after you
pointed out the issue you found. However, I'm fairly sure there has
been reports on this mailing list of sound stopping after a while when
watching a video. This matches very closely what you described.
I was thinking of
http://lists.freedesktop.org/archives/spice-devel/2014-July/017132.html
Maybe there was another email.
I couldn't quickly figure out the threading arrangement in qemu, but if the main channel is being driven by a different thread than the audio channel, then I think this patch would have introduced a bug:
---
commit bf9e210b21a66210b19f69fcaa4542b393b7dc22
Author: Yonit Halperin <yhalperi@xxxxxxxxxx>
Date: Fri Jan 25 09:34:19 2013 -0500
red_worker: video streams - adjust client playback latency
--
Of course, that's 18 months ago, so it seems to me we would have found it by now (despite it being a subtle, unpredictable bug that only occurs during video playback).
But, just to be sure, Nicolas, would you mind setting the SPICE_DISABLE_ADAPTIVE_STREAMING environment variable prior to running the client and seeing if that changes anything?
Cheers,
Jeremy
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