[mythtv] VDPAU stuttering in trunk

Taylor Ralph taylor.ralph at gmail.com
Wed Feb 10 22:57:18 UTC 2010

On Wed, Feb 10, 2010 at 5:42 PM, Jim Stichnoth <stichnot at gmail.com> wrote:
> On Wed, Feb 10, 2010 at 1:45 PM, Taylor Ralph <taylor.ralph at gmail.com> wrote:
>> On Thu, Feb 4, 2010 at 11:03 PM, Jim Stichnoth <stichnot at gmail.com> wrote:
>>> Wow, Google Docs now allows arbitrary documents.  Please try this:
>>> https://docs.google.com/leaf?id=0BxETmfuHvGPQMjRiZTZhYTItMDgwOC00MTYzLTk0YTItNWJhYWYxYWZiOTll&hl=en
>>> and let me know if it doesn't work, or if you want a much larger sample.
>>> Jim
>> I was able to reproduce the problem with my setup here with the
>> following config:
>>  * Nvidia Quadro NVS 135M (G86)
>>  * 256 MB GPU memory
>>  * Nvidia 195.30 driver
>>  * Temporal 2X (w/ skipchroma)
>> Before the new VDPAU rendering code was committed around changeset
>> [23235] the video plays flawlessly and afterwards the video fails to
>> keep up with the audio and results in massive frame drops like you are
>> experiencing.
>> Not sure if it matters but how much GPU memory do you have allocated
>> on your ION?
> I'm not sure how to check remotely, but "top" reports 1812716k total
> memory out of 2GB physically installed, so I'm guessing 256MB.  I will
> see if I can raise it.
> Jim

Yes you probably have it set to 256 MB or so. I would recommend 512 MB
anyways but that isn't the problem. It appears to be related to mixed
progressive/interlaced content so for the time being I'd just switch
your deinterlacer to a simpler one like Bob 2X until it's fixed.
Thanks for the sample.


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