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10.2 not recognizing some clips with alpha channels.
FYI, it appears that 10.2 is not recognizing some clips with alpha channels or at least the alpha channel in several of my ProRes 4444 files. I’ve tried re-importing them, changing the setting in the inspector from Premultiply to Straight and back again, tried changing the role and ect.
With that said I have a lower-third ProRes 4444 with an alpha channel that is working fine. Not sure what gives, the clip that isn’t working was before the update.
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8 Replies
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What is the source of the original file?
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Motion for both files.
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Alpha channels seem to work here. This is all media created before the update, though.
I’ll render one out of Morion and see what that does.
Do you have a small test file you can upload?
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I don’t know what Morion is, but I’ll give a shot anyway.
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I re-exported the file with the updated Motion and still getting the same issue. I can manually go into the Composition and change it to add alpha and works but this was something the FCPX recognized before automatically. My only thought with this clip is that the alpha channel only comes into play at the end of this clip while my other clip that does work uses the alpha channel from beginning to end.
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Thanks for explaining it. This looks like a bug.
I rendered out an alpha from Motion 5.2, added to FCPX, and there’s no alpha, but when viewing the channel, and the alpha is there.
You can set the composite mode to “alpha add” and the alpha then comes through.
Rendering an Alpha from Ae is just fine, though. This seems to be Motion based.
I will report this to Apple.
Jeremy
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It also looks like that the Alpha settings override defaults back to “ignore”. Perhaps it’s not a Motion bug, but the files from Motion seem to be the ones causing the error.
Jeremy
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[Devin Crane] ” My only thought with this clip is that the alpha channel only comes into play at the end of this clip while my other clip that does work uses the alpha channel from beginning to end.”
So, you’re on to something there. You have identified the problem. I recreated exactly what you’re seeing.
Although Alpha’s from Ae, no matter where they start or end, work just fine.
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