Indeed nice fish...
Comments inline
james tittle wrote:
On Mar 16, 2005, at 5:05 PM, B. Bogart wrote:
...um, I think you're overlooking the obvious: green screens == yuv processing! So obviously there are no alpha channels (unless you use the gpu alpha blending, like [blend< )...remember, yuv is gem's "native" colorspace on osx, but not on the other platforms...in other words, you should be in alpha heaven with the above films if you send [colorspace RGBA< to [pix_film] or [pix_movie] before loading the film...
That indeed did the trick, both TGA and TIFF work great. :) I apologize for asking for an existing feature for so long, but indeed things were not working very well for alpha channels in Linux when I needed this functionality and got fixated on it!
Is there some fusion of YUV processing with RGBA? YUV+A? Alpha channels are really handy, but it seems that the best performance would be to use YUV to get the performance out of the RGB part of the image and keep the alpha channel. (maybe the alpha channel could be compressed similarly to the Luminance channel in YUV.) Just thinking aloud.
I'm really looking forward to the fast colour-space convertions!
thanks Jamie for all your support.
It would be really great to get you guys up here to do a serious masterclass in Gem.
Oh and I've attached my old "dynamics" pmpd patch (compatible with the stable pmpd release) using nice drop-shadow bitmaps instead of the old vector ones.
B>
hth, james
ps: otoh, you could always add [pix_rgba] after [pix_film], but this will be sloooow...but not for too much longer, as I've been altivec'ing the color conversions :-)
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