[mythtv] NVidia XvMC Prebuffering Pauses

Wed May 18 05:55:18 UTC 2005

Hey Don,

I have been getting this of late (last 2 weeks) as well.

One fix which will help but not solve the problem is in nvidia-settings
ensure Texture Vsync -> Blank is off (under one of the menu's you will see
what I mean).

At the moment (as per Daniel's instructions) I am going to be doing
profiling on my mythtv install to find out where the CPU usage is going..

Also try rolling back to 66.29 drivers

Cheers
Dave

> Hello,
>
> I'm running today's CVS and NVidia XvMC is working a WHOLE LOT BETTER
> for me than it has in recent weeks.  I can now change channels without
> ever crashing mythfrontend due to heap corruption.
>
> One new problem that has cropped up though is that I'm getting tons of
> prebuffering pauses when watching HD content over firewire with my
> dct6200.  I can sometimes watch a channel without any problem, but
> frequently when I change channels I'll get the prebuffering along with
> jittery video or stuttering audio.  Sometimes exiting and reentering
> live TV will fix the problem; sometimes not.
>
> I'm running Fedora Core 3 with NVidia driver 1.0-7174.  I've attached a
> sampling from my mythfrontend log.
>
> Any advice or applicable patches?
>
> Thanks,
>  - Don
>
> 2005-05-17 22:27:10.994 Prebuffer wait timed out 10 times.
> 2005-05-17 22:27:10.994 Prebuffer wait timed out, and not enough free
> frames. Discarding buffers.
> 2005-05-17 22:27:10.996 AddInheritence past A        NOT in used or in
> done. ALAAAAdA
> 2005-05-17 22:27:10.996 AddInheritence future      F   NOT in used or in
> limbo. ALAAAAdA
> [mpegvideo_xvmc @ 0xb77e1854]Past frame is a B frame in findPastSurface
> [mpegvideo_xvmc @ 0xb77e1854]Past frame is a B frame in findPastSurface
> 2005-05-17 22:27:11.008 AddInheritence future      F   NOT in used or in
> limbo. LUAAAAdA
> 2005-05-17 22:27:11.100 GetNextFreeFrame() served a busy frame F.
> Dropping. UAdALUAL
> 2005-05-17 22:27:11.291 prebuffering pause
> 2005-05-17 22:27:11.291 AddInheritence past     E    NOT in used or in
> done. LLLLAdLA
> 2005-05-17 22:27:11.350 prebuffering pause
> 2005-05-17 22:27:11.376 prebuffering pause
> 2005-05-17 22:27:11.392 prebuffering pause
> 2005-05-17 22:27:11.409 prebuffering pause
> 2005-05-17 22:27:11.426 prebuffering pause
> 2005-05-17 22:27:11.442 prebuffering pause
> 2005-05-17 22:27:11.459 prebuffering pause
> 2005-05-17 22:27:11.476 prebuffering pause
> 2005-05-17 22:27:11.492 prebuffering pause
> 2005-05-17 22:27:11.509 prebuffering pause
> 2005-05-17 22:27:11.526 prebuffering pause
> 2005-05-17 22:27:11.535 Prebuffer wait timed out 10 times.
> 2005-05-17 22:27:11.535 Prebuffer wait timed out, and not enough free
> frames. Discarding buffers.
> [mpegvideo_xvmc @ 0xb77e1854]Past frame is a B frame in findPastSurface
> [mpegvideo_xvmc @ 0xb77e1854]Past frame is a B frame in findPastSurface
> 2005-05-17 22:27:11.536 AddInheritence future A        NOT in used or in
> limbo. AAAALdAA
> 2005-05-17 22:27:11.542 prebuffering pause
> 2005-05-17 22:27:11.545 AddInheritence past A        NOT in used or in
> done. ALAAUdAA
> 2005-05-17 22:27:11.576 GetNextFreeFrame() served a busy frame A.
> Dropping. ULLAUdUA
> 2005-05-17 22:27:11.996 prebuffering pause
> 2005-05-17 22:27:12.009 prebuffering pause
> 2005-05-17 22:27:12.025 prebuffering pause
> 2005-05-17 22:27:12.042 prebuffering pause
> 2005-05-17 22:27:12.059 prebuffering pause
> 2005-05-17 22:27:12.075 prebuffering pause
> 2005-05-17 22:27:12.092 prebuffering pause
> 2005-05-17 22:27:12.109 prebuffering pause
> 2005-05-17 22:27:12.125 prebuffering pause
> 2005-05-17 22:27:12.142 prebuffering pause
> 2005-05-17 22:27:12.159 prebuffering pause
> 2005-05-17 22:27:12.160 Prebuffer wait timed out 10 times.
> 2005-05-17 22:27:12.160 Prebuffer wait timed out, and not enough free
> frames. Discarding buffers.
> 2005-05-17 22:27:12.162 AddInheritence past        H NOT in used or in
> done. AAALAAdA
> 2005-05-17 22:27:12.162 AddInheritence future     E    NOT in used or in
> limbo. AAALAAdA
> 2005-05-17 22:27:12.220 prebuffering pause
> [mpegvideo_xvmc @ 0xb77e1854]XvMC: error, decoding P frame and past
> frame is null!
> [mpegvideo_xvmc @ 0xb77e1854]XvMC: error, decoding P frame and past
> frame is null!
> [mpegvideo_xvmc @ 0xb77e1854]XvMC: Error, decoding B frame and past
> frame is null!
> [mpegvideo_xvmc @ 0xb77e1854]XvMC: Error, decoding B frame and past
> frame is null!
> [mpegvideo_xvmc @ 0xb77e1854]XvMC: Error, decoding B frame and past
> frame is null!
> [mpegvideo_xvmc @ 0xb77e1854]XvMC: Error, decoding B frame and past
> frame is null!
> 2005-05-17 22:27:12.343 GetNextFreeFrame() served a busy frame E.
> Dropping. ULAUUUAL
> 2005-05-17 22:27:35.533 prebuffering pause
>
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