[mythtv] [PATCH] viavld interlaced patch

[Robert Clark]

On Sat, 2004-10-02 at 11:08, Terry Barnaby wrote:

> Ivor Hewitt wrote:
> 
> >Minor patch to fix the interlace logic in the xvmc-vld code.

> Thanks for that patch Ivor, I notice that Robert Clark has seen issues with
> interlace as well and I am not yet happy with the quality when motion
> is present.

  I've had another look at this and I am now seeing evidence of
interlacing (flickering when paused during motion). Bizarrely, this is
only happening some of the time, though, so I think it's not 100%
correct yet. One thing that did cross my mind was that perhaps only some
frames (I-frames?) are being decoded properly. Unfortunately, I don't
know enough about MPEG compression or how the CLE266 accelerates it to
be much help.

  I'm in the middle of rebuilding everything on my Myth box from the
ground up with the latest versions of drm, X drivers and MythTV before I
look into this further. I'll be very interested (and grateful!) to see
if Ivor's patch sorts this out when I'm finished.

  One thing which you've probably already checked is scaling. I had
great difficulty convincing MythTV not to scale the image and any
vertical scaling destroys the interlacing. Eventually I gave up and
patched it to hardcode the display aspect to match the source.

	Robert