Monday, January 24, 2011

[Avid-L2] Wrong Format on alpha channel video?

 

I've seen this before when stepping into a matte key or in this case a title key and pulling out the alpha channel and cutting it into the time line with the results being "wrong format."  Usually putting a submaster effect over the clip and rendering fixes it.  This time I can option c the alpha and see it in the source monitor fine.  When I cut it into the time line I get wrong format and the submaster render doesn't work.  I've found I can step in and mark the alpha channel track/clip and create a video mix down and that works.  My question is why isn't the submaster render approach working.  This is SNDX 4.0.5 Mac OS 10.5.6.  Anybody got a reason for this less than typical behavior?

John Moore

Barking Trout Productions

Studio City, CA

bigfish@pacbell.net

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