[mythtv] [mythtv-commits] Ticket #2649: Opengl video renderer

[Mark Kendall]

On 1/26/07, Mark Buechler <mark.buechler at gmail.com> wrote:
> Well, interesting results. First off, commenting out those three lines
> doesn't help in any noticeable way. For some reason my OSD looks slanted to
> the right. In other words, what should be vertical lines are now diagonal.

This is interesting/worrying - can you give me more details on your
system/drivers etc? any chance of a screen shot?

> Also, I can see interlace effects on interlaced material watching on an
> interlaced display - especially during any movement

Are you sure this isn't tearing? I've noticed that if the GPU is
struggling to keep up, vertical sync is the first thing to go. And is
this SD interlaced material displayed at 1080i? - in which case I'd
expect to see artefacts - it may be a side effect of the better
scaling you're seeing.

> SD playback is barely
> usable on my 5700LE but more on my 6800GT. HD is still impossible on the
> 6800 - even 720p content. Again, this is all with NO deinterlacers turned
> on. However, I have to say that the quality of the display of SD material is
> MUCH improved. It's like night and day. Apparently GL scales much better
> than Xv.
>
> What type of performance gains do you hope to gain through tuning? Can you
> see a point in the future when it's possible to view HD content in OpenGL?

It's possible now - you just need a more powerful card! My 7600GS
copes with 1080i if there are no deinterlacers involved.

I don't honestly expect the performace improvements to be large. I
might however look at software converting the osd - though it's a
pretty inefficient way of getting a high res osd.

Cheers

Mark