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FCP alpha Codec
Posted by Jeff Ledellaytner on August 1, 2007 at 6:20 pmHey there,
Does anyone know if there is a codec out there that Final cut can play in real time that includes an alpha channel? I’m running FCP6.0 on an Intel Mac Pro with the Kona 3. For instance, I want a codec to render a lower 3rd out of After effects, that will play in real time in an FCP sequence. Prefferably an uncompressed 10bit. Thanks.Jeff
Rafael Amador replied 18 years, 9 months ago 6 Members · 10 Replies -
10 Replies
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Russell Lasson
August 1, 2007 at 6:45 pmNot that I know of. When you stack one clip with an alpha channel on top of the other you will need to render it (though sometimes it might play it back at a lower quality in realtime.)
-Russ
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Russell Lasson
August 1, 2007 at 6:56 pm[Dave LaRonde] “when I want footage with an alpha channel… no rendering, either.”
Do you put it into a 10-bit uncompressed timeline or a animation timeline. Even though it might playback, don’t you need to render it before or on output?
-Russ
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Gary Alan
August 1, 2007 at 7:10 pm -
Russell Lasson
August 1, 2007 at 7:14 pmIt’s my understanding that it doesn’t support FCP realtime features though. But if you put it into a 10-bit uncompressed timeline it might behave the same as the animation codec.
-Russ
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Misha Aranyshev
August 1, 2007 at 8:03 pm[Dave LaRonde] “And my card isn’t nearly as cool as a Kona 3.”
Targa Cin
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John Heagy
August 1, 2007 at 8:35 pmApple’s “none” codec supports uncompressed RGBA and would probably playback easier assuming your drives are fast enough.
John
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Jeff Ledellaytner
August 1, 2007 at 9:39 pmThanks everyone for writing back. We’ve tried Sheer and Animation+ codecs. Both playback on a DV timeline just find in UNLIMITED RT mode. Playing back those codecs in a 10bit uncompressed timeline, it gets kinda choppy.
We’re running the media off a MEDEA SCSI raid, so the drives are super fast. The MACPRO also has 8G of RAM in it and it’s the DUAL QUAD core. So the thing is a beast, but when you put the timeline in SAFE MODE, you still have to render it. Bummer.
Jeff
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Misha Aranyshev
August 1, 2007 at 9:41 pmIt has hardware RGB<>YUV conversion and alpha support. None of the “modern” FCP-compatible cards have anything like this so until Apple moves FCP processing engine from CPU to GPU keep that contraption around.
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Russell Lasson
August 1, 2007 at 9:45 pmThat’s been my experience. You’ll still need to render.
-Russ
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Rafael Amador
August 2, 2007 at 2:48 amWithout hesitate: Sheer.
You got RGB(A) 8/10b and YCbCr(A) 8/10b 444 or 422. And the size of the files are a fraction of the Apple Unc. Works great.
Cheers,
rafael
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