[mythtv] [mythtv-commits] Ticket #2649: Opengl video renderer
mark.buechler at gmail.com
Fri Jan 26 12:09:39 UTC 2007
On 1/26/07, Mark Kendall <mark.kendall at gmail.com> wrote:
> 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
> > the right. In other words, what should be vertical lines are now
> This is interesting/worrying - can you give me more details on your
> system/drivers etc? any chance of a screen shot?
I'll see if I can drum up a screenshot tonight. My system is an AMD 3200+
with the 5700LE/6800GS running NVidia's drivers v8774.
> 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.
Tearing would be a good term but extreme tearing is more like it but it's
only on the OSD, not the video. The SD content is 480x480 interlaced display
on a 1080i TV in full res.
> 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
> > 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
> > see a point in the future when it's possible to view HD content in
> 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.
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