[mythtv-users] Frame by frame rewind problems

[Raymond Wagner]

On 12/13/2011 14:20, Brian J. Murrell wrote:
> On 11-12-13 02:11 PM, Nick Rout wrote:
>> Particularly when decoding is being done on the GPU. I don't think the
>> decoded frames ever exist in system RAM.
> Indeed.  I don't think I ever had any illusions that any of this could
> be done on the GPU (i.e. with vdpau, etc.).  I had always assumed for
> smooth back-stepping software decode would be necessary.

It depends on how you're handling playback.  Right now, MythTV just 
hands video off to VDPAU, and lets it handling everything through to the 
display.  XBMC decodes video in VDPAU, and then passes it back out to 
the system, where it then gets passed back into the card using OpenGL 
for compositing with the rest of their UI.