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FCP export alpha? same problem …
Did this get resolved?
I’m having the same frustrating time. I have a sequence with a clip in it which contains an alpha; I can see the chequerboard BG; I’m exporting using QuickTime conversion, as Animation, millions+ … SHOULD BE RIGHT, yeah?
I reimport my export to check it, and I get no alpha …What’s the John Dory, anyone?
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5 Replies
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seems you can’t render the clip in the timeline which has an alpha. (I was simply using FCP to speed-up a quicktime with alpha.)
When I didn’t render the timeline, but did the export, my export worked. i.e. I got a new QT with alpha!I trust that information is buried in the manual somewhere …
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I thought that in FCP you put it in the timeline on layer 2 or up, and turned off layer one to export with alpha intact.
Are you exporting a reference movie?
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Thanks Bret, I tried what you said … same issue.
If the clip is rendered, it won’t output the alpha.
(this is evidenced by my sequence, which runs part of a clip as-is, then cuts to same clip with motion effect (speed) on it, then cut to original clip again with no effect. If the speed-affected clip is rendered, it doesn’t output the alpha … ie, my exported QT plays first part with alpha, middle on black, third part with alpha …) -
This is normal behavior if your sequence codec does not support alpha channels (most do not).
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If you get the checkerboard in the canvas….NOT in the viewer and you set the channnel to RGB in the canvas (do NOT show the alpha channel) then it should work. I tried it today and it worked (animation codec, million+, best quality). Make sure you solo the track so that no other alphas are shown.
Good luck,
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