Xvideo performance on Radeon 7500 vs Intel 915

Edgar Toernig froese at gmx.de
Mon Dec 4 14:55:54 PST 2006

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.

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.

Ciao, ET.

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