On Wed, Jan 02, 2002 at 04:02:44PM +0100, Zdenek Kabelac wrote: > So to continue our discussion here - > > > I've `found' on my hard driver mga.o driver which has Macrovision > disabled - then I've implemented vsync IRQ handler for second head. > Then I've watched movie on second head. cool
> And I would say the image has very good quality - then I've even
> used aviplay without any IRQ handling and still I've almost not noticed
> any problems on my TV - except few 'tearings' and about two 'judder' problems
> per 30 minutes - which is much better then Windows anyway... - and I've
Hmm I see judder almost every second. Try e.g. the Hanaukyo epsiode I sent you
some time ago (or I'll upload something else on which you can see it), when
the picture is panning (vertically or horizontally), you'll notice judder
immediately.
I must add, it is far less noticeable than the stuff virtualdub produces, but
still is annoying. I can't compare to Windows because I don't have any.
> been really watching carefully - much more annoying however is
> RGB only support - so I've studied MGA doc more and I guess I'll write
> my own device with proper YUY2 support for second head
> (as Xfree TV dualhead has somewhat limited screen size - so you could
> see some black borders around the image)
Thats the same with other cards (ATI & voodoo), at least unter linux, too, and
imho has nothing to do with dualhead.
> So Petr
Peter vole :-)
> are you able to write similar VSYNC device like there is one for MGA ?
As I said ATI handles doublebuffering inside X driver, so there was no need
for it. OTOH I can try to add this feature inside the new km driver (capturing
module for ATIs), I'll need to talk to others first though.
> Also MGA goes in 50Hz on my PAL TV - so are you sure about you 25Hz step ?
No. I only perceive judder, so the 25 fps is a guess, I never actually measured it.
> As for rate - the usage with IRQ device was very very precise - e.g.
> for 29.97 it has been doing almost precise telecine transformation 3:2.
Sounds good.
Bye,
Peter Surda (Shurdeek) <[EMAIL PROTECTED]>, ICQ 10236103, +436505122023
--
Dudes! May the Open Source be with you.
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