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Alpha export question
Hi all, this should be a no-brainer – but how on earth do you export a motion project with an alpha channel? I’ve tried exporting normally through motion, and also through compressor – with various settings and all I seem to get is a big white square in my alpha chan. When I view the alpha chan in my motion project everything seems fine, it’s the export where things go awry. This has been driving me mad, can anyone save my sanity?
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3 Replies
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I am having the same issue please help!
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You have to export using a QuickTime codec that supports alpha channels. Some of the presets in both Motion and Compressor that are set to QT codecs such as DV NTSC do not support alpha channels because those codecs can’t support transparency.
To find out if a QuickTime codec supports alpha, look for an option for “Millions+” under Depth in the QuickTime settings dialog – if this is available then that codec supports an alpha channel. The most frequently-used QuickTime codec that supports alpha is the Animation codec, which is also used by the “Lossless” preset in the Motion export dialog. If you choose this preset you will get an alpha channel as long as your background is transparent in the Motion project itself.
— Greg
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Cheers Greg, that’s been a great help.
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