[mythtv] [mythtv-commits] Ticket #6343: Problem with VDPAU and Temporal 2X deinterlacing

[Taylor Ralph]

--- On Wed, 3/11/09, MythTV <mythtv at cvs.mythtv.org> wrote:

> From: MythTV <mythtv at cvs.mythtv.org>
> Subject: Re: [mythtv-commits] Ticket #6343: Problem with VDPAU and Temporal 2X deinterlacing
> To: mythtv-commits at mythtv.org
> Date: Wednesday, March 11, 2009, 12:15 AM
> #6343: Problem with VDPAU and Temporal 2X deinterlacing
> -------------------------------------+--------------------------------------
>  Reporter:  tralph11 at yahoo.com       |        Owner:  ijr  
>  
>      Type:  defect                   |       Status: 
> closed 
>  Priority:  minor                    |    Milestone: 
> unknown
> Component:  MythTV - Video Playback  |      Version:  head 
>  
>  Severity:  medium                   |   Resolution: 
> invalid
>   Mlocked:  0                        |  
> -------------------------------------+--------------------------------------
> Changes (by markk):
> 
>   * status:  new => closed
>   * resolution:  => invalid
> 
> 
> Comment:
> 
>  This is working as intended.
> 
>  More advanced deinterlacers (not just in vdpau) typically
> use 3 frames for
>  processing - with the middle frame intended for display.
> This means there
>  is a 1 frame discrepancy between the audio and video
> (which generally goes
>  unnoticed). When the deinterlacer is then disabled there
> is a momentary
>  re-adjustment of the video. Bob does not use the extra
> reference frames,
>  hence no visual impact when switching.


Mark, thanks for the explanation. I guess the high quality deinterlacers don't work very well with this type of material.

For comparisons sake I did run the video through xine-vdpau using Temporal 2X and it did not show any visual problems. I'm not sure if they leave deinterlacing turned on all the time or not for VDPAU.

Sorry if this is a dumb question. In the case of VDPAU is it possible to leave the deinterlacer enabled? I wasn't sure if VDPAU was intelligent enough to detect progressive frames and leave them alone or not.

BTW, thanks for all your help. The VDPAU feature has been extremely solid for me so far!

--
Taylor

> -- 
> Ticket URL:
> <http://svn.mythtv.org/trac/ticket/6343#comment:1>
> MythTV <http://www.mythtv.org/>
> MythTV
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