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Revealing Alpha
I have a TGA file that I’ve imported as a clip. It has an alpha. For the textless elements at the end of the show I want to include this footage, both as Fill and Key signal. For fill it’s easy, I set the Alpha to ‘None’ but for the Key it’s more difficult, I can’t find a way to make the clip’s Alpha visible.
Without taking the TGA back into Photoshop and extracting the alpha channel that way into it’s own file, is there a way to have FCP reveal the alpha of a clip?
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3 Replies
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Hi Dylan,
i’ve never tried that way, but I think you can do it with the “Channel Mixer” or “Channel Swap”. In the Channels filters.Mac OX 10.5.2-FC 6.02-QT 7.4.1
G5 2x2Gh 4GbRAM-BlackMagic Extreme
PMBP 17″Core2Duo 4GbRAM-AJA ioHD
JVC DTV-17″
SONY EX-1 . SONY PD170
..and always a big mess on top of the table. -
Ahh, didn’t think to look at the filters. Good call, I’ll check that out.
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Rafaels right – i figured this out last week as i needed exactly the same output.
Simply put a channel mixer on a dupe of the clip, set all the rgb digits to 0 and the alpha digits to 1. There is an alpha option in each of the rgb sections in this plug.
Adam Taylor
Video Editor/Audio Mixer/ Compositor/Motion GFX/Barista
Character Options Ltd
Oldham, UK
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