Hi All,

I am using the method described

to crossfade between two Quicktime video clips. Both 640x480, 25fps, compressed using Photo-JPEG codec at 75%, approximately 15 seconds in length each. This task seems impossible - the CPU jumps to and stays at 100%. My machine is Pentium M Centrino 1.6GHz with 1.5GB of RAM, ATI Mobility Radeon 9600 (64MB). Video editing software I use has no problem crossfading two DV-PAL clips at 720x576 in real time. Even then CPU doesn't go above 50%.

Is it an issue with GEM on Windows? Would doing this from Linux be more efficient? Perhaps my ATI drivers? I'm using the latest. My machine too slow? Well, it's not the fastest, but I'm only trying to play two clips at less than full-frame SD resolution... Should I forget about crossfading two clips at 720x576?... Perhaps not the most efficient codec?

Only 2 weeks to go before I have to exhibit my piece at a gallery. Is GEM not the way to go? vvvv? PiDiP? Jitter? What are your experiences?

Any ideas / advice would be much appreciated!

Thanks!

Vytis

can you post your patch? We could tinker with it perhaps...

Hi

Here's the patch. Pretty simple. I would very much appreciate it if you could take a look and see if there are any possible flaws. Also, what would be the most efficient way of running it full screen? Should I set my desktop resolution to something as low as 800x600 to improve playback?

I've just noticed that my Photo-JPEG Quicktime has a bitrate of 13Mbps which is very high IMHO! Maybe that's the cause. I'll re-encode my clips and see if that helps.

THANKS!

http://www.pdpatchrepo.info/hurleur/video-xfade.pd