[MPlayer-users] Playback issues with dual-core - audio/video out of sync

[Brano]

...my response on the bottom of this mesage

> Where are you getting the dual core cpu numbers from? 
> Does top show both cores? 
> What kernel are you running? 
> Is it an SMP instance? 
> 
> Paul Yurt
> The more credible, accurate & honest Web: www.mastermoz.com 
> 
> -----Original Message-----
> From: mplayer-users-bounces at mplayerhq.hu
> [mailto:mplayer-users-bounces at mplayerhq.hu] On Behalf Of Brano
> Sent: Monday, June 04, 2007 9:41 AM
> To: MPlayer usage questions, feature requests,bug reports
> Subject: Re: [MPlayer-users] Playback issues with dual-core - audio/video
> out of sync
> 
> 
> 
> -------- Original Message --------
> 
>> Hi Brano!
>>
>>  On 2007.06.04 at 09:08:20 -0400, Brano wrote next:
>>
>>> I've recently upgraded my single core Athlon for Dual-core Athlon CPU 
>>> (just a CPU swap, no other changes on the system).
>>>
>>> Since the swap, on some movies played through mplayer viedo and audio 
>>> gets randomly out of sync.
>>> More specific, audio continues to play OK, but video is approximately 2x 
>>> the speed. This starts anywhere in the movie and stops when I manually 
>>> do FF and play again. I've seen it on MKV h264 files mostly, but on divx 
>>> too.
>>>
>>> Any ideas what may be wrong?
>> Maybe you don't have enough cpu power anymore, because each core of
>> current cpu is slower than former single-core cpu?
>> What are exact names of old and new cpus? Does top show close to 100%
>> cpu usage when playing such files?
>>
>> Other thing that can /probably/ lead to such results is timer issues.
>> I don't know if they can appear in your case, but updating bios and
>> getting newer linux kernel may help.
>>
> 
> Thanks for response.
> The upgrade was from Athlon64 3200+ to Athlon64 X2 3800+.
> When playing 720p movie on the dual core the one core is somewhere 
> around 40-50% peaking to 75%. The other core is pretty much 0%.
> The same movie on the old single core was somewhere 60-80% CPU.
> 
> The weird thing is that this is not happening always. It's random. 
> Sometime 30min into movie, sometime later on. Not on the same spot. 
> Suddenly the video starts running faster but the sound is OK. When I hit 
> FF and Play everything synces again.
> I've never experienced this on the old CPU.
> 
> Kernel is (and was) 2.6.20.7-default.
> 
> Thoughts?

 > Where are you getting the dual core cpu numbers from?
I'm watching graphical gkrellm and top.

 > Does top show both cores?
Yes, both individual or combined.

 > What kernel are you running?
 > Is it an SMP instance?
2.6.20.7-default SMP ...I've used the same kernel on single CPU as well.
The system is SUSE 10.2 (custom kernel as above) running MythTV.

Mplayer parameters are:
vo=xv
monitoraspect=16:9
ac=hwdts,hwac3,a52,
subcp=cp1250
subfont-osd-scale=4