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8.2 Alpha channel

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andrew sableton
8.2 Alpha channel
on Aug 23, 2012 at 7:34:50 pm

I have a ProResHQ FCP7 sequence with ProResHQ media except for some FX material that is in animation codec with alpha channels. Should I bake these animation codec clips as ProResHQ and then somehow extract a matte from them to import into a node in DAVINCI? Will this then work in a round trip?

I'm a little confused as to how to get this to work.....

S


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andrew sableton
Re: 8.2 Alpha channel
on Aug 23, 2012 at 7:36:50 pm

Also Davinci seems to refuse to see the animation codec QTs at all - I look in the folders where they should be through the DAVINCI browse page and these clips do not appear, although they are in the OSX finder....


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Joseph Owens
Re: 8.2 Alpha channel
on Aug 23, 2012 at 9:07:58 pm

So, a couple of things.

First of all, if you go looking at the http://www.blackmagicdesign.com/media/2588311/davinci_resolve_8.2_supported...

you won't find the Animation codec. It won't appear on a lot of lists.

Its a bit long in the tooth as a "lossless" codec, its only adavantage now being that it is one of the few that can carry an alpha channel, but then there's ProRes 444.

Resolve 9 can use alpha channels for matte purposes, but not 8.2. You will have to extract the alpha channel somehow and export that (exact length of the original clip) as a recognized codec and attach it to the source clip as an external matte. You cannot export an alpha out of Resolve.

jPo

"I always pass on free advice -- its never of any use to me" Oscar Wilde.


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andrew sableton
Re: 8.2 Alpha channel
on Aug 23, 2012 at 9:20:01 pm

Ok thanks JPO - what would your process with FCP be to 'extract' the alpha?

S


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Sascha Haber
Re: 8.2 Alpha channel
on Aug 24, 2012 at 6:15:13 am

Please just upgrade, you will love it and need to learn a cumbersome workaround .

A slice of color...

DaVinci 9b3 OSX 10.8
MacPro 5.1 2x2,4 24GB
RAID0 8TB
GTX 470 / Quadro 4000
Extreme 3D+

Colorist / Aerial footage nerd
http://vimeo.com/saschahaber


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Eric Johnson
Re: 8.2 Alpha channel
on Aug 24, 2012 at 8:32:56 pm

For a luma matte, you can load your clips in the viewer, change your view from RGB to ALPHA. You should see a B+W of what your alpha should be... and export.

I'm sure there are other ways. That's the way I know of.


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