On 8/27/07, Graham Evans <[EMAIL PROTECTED]> wrote: > I just checked ... you use component Y'CbCrA 8-bit 4:4:4:4 in a > quicktime container for YUVA-8 bit color model or use Uncompressed RGBA > for the RGBA-8bit color model. These are the only formats which I have > succeeded with so far to properly save alpha channel footage with no > glitches. > > Make sure you specify the right color model in the Format dialog > otherwise the resulting render is black or chaotic with no warning why. > > I use this technique to render out chromakey footage. As well as using > chromakey HSV (often in several layers) I mask out stray chromakey > glitches (such as when you use a too small back-cloth), blur zoom on the > chromakey effects for nice smooth anti-alias style edge and apply any > other simple corrections which will save me work later. Then I render. > > Using the pre-rendered footage I can now begin editing with all speed > and no effects cluttering up the timeline.
So, what happens if you don't do this first? Is the playback just to slow and timeline too cluttered to be useful in getting the effect right? Just curious. > Perhaps thats a seperate episode. Yes. This is most likely beyond the scope of the tutorial, but good to know. > > Graham > > _______________________________________________ > Cinelerra mailing list > [email protected] > https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra > -- Thanks, Aaron Newcomb http://www.thesourceshow.org http://www.opennewsshow.org _______________________________________________ Cinelerra mailing list [email protected] https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
