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10.2 not recognizing some clips with alpha channels.

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Devin Crane
10.2 not recognizing some clips with alpha channels.
on Apr 14, 2015 at 11:03:38 pm
Last Edited By Devin Crane on Apr 14, 2015 at 11:12:59 pm

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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Jeremy Garchow
Re: 10.2 not recognizing some clips with alpha channels.
on Apr 14, 2015 at 11:19:18 pm

What is the source of the original file?


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Devin Crane
Re: 10.2 not recognizing some clips with alpha channels.
on Apr 15, 2015 at 12:55:52 am

Motion for both files.



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Jeremy Garchow
Re: 10.2 not recognizing some clips with alpha channels.
on Apr 15, 2015 at 11:14:29 am

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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Jeremy Garchow
Re: 10.2 not recognizing some clips with alpha channels.
on Apr 15, 2015 at 12:11:11 pm

I don't know what Morion is, but I'll give a shot anyway.


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Devin Crane
Re: 10.2 not recognizing some clips with alpha channels.
on Apr 15, 2015 at 3:15:55 pm

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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Jeremy Garchow
Re: 10.2 not recognizing some clips with alpha channels.
on Apr 15, 2015 at 3:56:52 pm

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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Jeremy Garchow
Re: 10.2 not recognizing some clips with alpha channels.
on Apr 15, 2015 at 4:26:19 pm

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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Jeremy Garchow
Re: 10.2 not recognizing some clips with alpha channels.
on Apr 15, 2015 at 6:38:49 pm

[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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