[mythtv-users] Video is X frames behind audio dropping frame

Michelle Dupuis mdupuis at ocg.ca
Wed Sep 29 02:58:52 UTC 2010


I saw this in the wiki and I'm not sure how to interpret it:

"In MythTV, it is not possible to configure video playback profiles to filter based on video format (only by resolution). So it is not currently possible to use VDPAU for H.264/HD-PVR and Xv for Mpeg2. "

Since I'm exclusively recording using an HD-PVR, does it mean the VDPAU is disabled?  So I have to use CPU for video decoding???  I sure hope not!!

Thanks
MD
________________________________________
From: mythtv-users-bounces at mythtv.org [mythtv-users-bounces at mythtv.org] On Behalf Of William Powers [wepprop at gmail.com]
Sent: Tuesday, September 28, 2010 3:26 PM
To: Myth TV Users List
Subject: Re: [mythtv-users] Video is X frames behind audio dropping frame

On Sep 28, 2010, at 10:57 AM, Michelle Dupuis <mdupuis at ocg.ca> wrote:

> I have a new ION based box, with filter set to VDPAU NORMAL.  When
> playing back recorded TV there is obvious dropped frames and the FE
> log shows the error below.
>
> I have no clue has to start investigating this one....can anyone
> help?  My CPU is at 25% and the top process is X
>
> 2010-09-28 11:53:16.940 NVP(0): Video is 3.8941 frames behind audio
> (too slow), dropping frame to catch up.
> 2010-09-28 11:53:16.940 NVP(0): Video is 3.40058 frames behind audio
> (too slow), dropping frame to catch up.
> 2010-09-28 11:53:17.239 NVP(0): Video is 3.45488 frames behind audio
> (too slow), dropping frame to catch up.
> 2010-09-28 11:53:17.239 NVP(0): Video is 4.30121 frames behind audio
> (too slow), dropping frame to catch up.
> 2010-09-28 11:53:17.240 NVP(0): Video is 4.69597 frames behind audio
> (too slow), dropping frame to catch up.
> 2010-09-28 11:53:17.240 NVP(0): Video is 4.75201 frames behind audio
> (too slow), dropping frame to catch up.
> 'video_output' mean = '16974.28', std. dev. = '29847.53', fps =
> '58.91'
> 2010-09-28 11:53:17.240 NVP(0): Video is 4.539 frames behind audio
> (too slow), dropping frame to catch up.
> 2010-09-28 11:53:17.240 NVP(0): Video is 4.12427 frames behind audio
> (too slow), dropping frame to catch up.
> 2010-09-28 11:53:17.241 NVP(0): Video is 3.5882 frames behind audio
> (too slow), dropping frame to catch up.
> 2010-09-28 11:53:17.559 NVP(0): Video is 4.04884 frames behind audio
> (too slow), dropping frame to catch up.
>
Go to the Wiki article for VDPAU and follow the recommendations
there.  From my recent experience with a 9300 graphics Mini-ITX
motherboard, I had to disable the composite extension in X and use the
VDPAU Slim playback profile to get smooth playback of HDPVR
recordings. YMMV.
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