Xvideo performance on Radeon 7500 vs Intel 915

Roland Scheidegger sroland at tungstengraphics.com
Mon Dec 4 16:02:18 PST 2006

Edgar Toernig wrote:
> Roland Scheidegger wrote:
>> Edgar Toernig wrote:
>>> But I noticed one thing: sometimes the last 1 or 2 lines of the
>>> xv-overlay shows garbage (usually green random stuff).  Once I
>>> had this effect not on the last line but the rightmost column.
>> I've actually seen a bogus line on the right once too, but it happened
>> even without the patch. Seemed to be caused when the dst box coordinates
>> were not whole pixels.
>> At the bottom might be new though.
> I never had that with older versions, neither with the driver in
> xorg 6.9 nor with an about 2 month old git version.
Well it's quite likely I've made it more likely :-).

> I've played around a bit and now I can reproduce the effect
> reliably.  I pick a video and make the window either taller or
> wider so that I get black bars at the top/bottom or left/right
> (the player maximizes and centers the video while keeping the
> aspect).  Then I move the window either to the top or the left
> so that it has to be clipped.  At the moment it gets clipped,
> the bottom or right garbage lines show up.  The bottom line
> garbage (which actually consists of two lines) is hard to see
> (you can only see one line and it's dark) but if you change the
> colorkey to black you can see both lines and they are much
> brighter.  The right column garbage can only be seen with black
> colorkey as the garbage is usually clipped by the colorkey.
I tried, but can't reproduce this. What hardware? What player? What size
is the video, your resolution? In any case, I'm now going to commit it
so I'm sure more people will complain ;-).


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