[mythtv] MythTV 0.26, XVideo, and OpenGL

Michael T. Dean mtdean at thirdcontact.com
Wed Apr 11 23:01:57 UTC 2012

On 04/11/2012 10:09 AM, Raymond Wagner wrote:
> On 4/11/2012 09:44, Daniel Kristjansson wrote:
>> On Wed, 2012-04-11 at 23:08 +1000, Jean-Yves Avenard wrote:
>>> On 11 April 2012 22:27, Daniel Kristjansson<danielk at cuymedia.net>  
>>> wrote:
>>>> Not in 0.26. I did some testing and the OpenGL video
>>>> renderers are just too demanding to run acceptably
>>>> on graphics cards released just last year.
>>> What graphic cards have you tried for which OpenGL was too demanding?
>>> even the Intel HD3000 has no issue handling OpenGL ; I can't think of
>>> a lower spec graphic card.
>> NVS 3100M -- http://www.nvidia.com/object/nvs_techspecs.html
>> It's a lower end laptop chip but it was in a new laptop I bought
>> just last year. It was close enough that maybe some optimization
>> might make it work, but it wasn't up to the job as is.
> That doesn't make much sense, as the NVS 3100M is just an ION2, which 
> does fine with the OpenGL video renderer.  Even my considerably lesser 
> powered onboard 8200 can handle OpenGL.

I think the issue is that (our current implementation of) OpenGL video 
rendering is significantly more CPU-intensive (and/or 
memory-/bandwidth-intensive) than XVideo rendering, so OpenGL rendering 
with any video card--even modern/high-performance/"ideal" ones--will 
require significantly more resources than XVideo.  Chances are Daniel's 
laptop has a less-capable CPU or whatever than your system--even though 
it has a newer GPU.


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