[QLab] video crossfade

[Paal T Nygaard]

Hi!

I have also had kind of very poor results when crossfading video. 
Tried with all kinds of Mac laptops, none could do it well enough.
Had to rent a big fat Mac from a video company to be able to 
crossfade two DV QT files with close to good enough results. I find 
this a bit strange..?:-)
This Mac had dual Xenon processors, the bigest VGA card you can buy 
for a Mac, 4 gigs of ram, fastest possible internal harddisks...

Adobe Premiere can crossfade perfectly the same files, in realtime 
without pre-rendering, even with a few colour plugins, zoom in etc. 
And this on a standard Intel pent 4 3 ghz PC with a rather old 
vga-card, Nvidia FX 5600.  On an Intel Core 2 Duo with newer Nvidia 
card, even more plugs can be added.
I can say for sure that both these PCs only have a fraction of the 
power that the rented video Mac had.

Would be nice to have some info from a Mac-geek on what could be 
causing his poor vide cossfades, and also what could be done about it.

For a start: What would be the easiest codec, resolution and 
fileformat to use for video? Any hardware accellerators to buy? 
Possible to write  better videoplayback and fade module for Qlab?

Cheers,

Paal





At 23:11 01.11.2007, you wrote:
>The mini's have a GPU, but it's integrated and shares the ram with the
>rest of the system.  Do not expect to fade between anything higher
>than two 480p movies.  I have tested this on both my core duo and core
>2 duo mini's.
>
>~Noah
>
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