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Black bckgrnd on Alpha 4444+ FCP export

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Ignatius Gorin
Black bckgrnd on Alpha 4444+ FCP export
on Nov 16, 2012 at 4:34:49 pm

Hi there --

Desperately trying to export an FCP 7 comp where I need the initial and last frames to be transparent (to encode in FLV Alpha with Adobe Encoder).

I tried pretty much everything I could think of, and all tricks I aw mentioned here and there, to no avail.

Exporting from Quicktime compression, Alpha 4444 million, from v2 (tried v1 too), both rendered and unrendered, still getting a black background even when reimporting in FCP and checking against a white background (so I'm obviously getting the black background in Encoder too).

I initially thought this was due to the fact that I use Perspective Reflection plugin on those tracks (never could export these with reflection on a transparent background, BTW). So I added a one second color clip before the video clip, with a fade in (transition) from nothing to color, then crossfade to clip with Perspective Reflection; still no luck). I only need the first and last frames to be transparent...

Also, Alpha column is set to Plain in the browser for those files.


Appreciate any help. TIA.



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Rafael Amador
Re: Black bckgrnd on Alpha 4444+ FCP export
on Nov 16, 2012 at 6:42:58 pm

[Ignatius Gorin] "Exporting from Quicktime compression, Alpha 4444 million"
You need Millions+.
rafael

http://www.nagavideo.com


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Ignatius Gorin
Re: Black bckgrnd on Alpha 4444+ FCP export
on Nov 16, 2012 at 8:37:24 pm

Yes, what I meant, sorry. Million+.



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Rafael Amador
Re: Black bckgrnd on Alpha 4444+ FCP export
on Nov 17, 2012 at 9:01:20 am

"Alpha column is set to Plain in the browser for those files."
Where are you getting "Plain Alpha"?
FCP options aret:
- None/Ignore
- Strait
- White
- Black
rafael

http://www.nagavideo.com


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Ignatius Gorin
Re: Black bckgrnd on Alpha 4444+ FCP export
on Nov 17, 2012 at 9:27:01 am

It's set to simple (sorry I translated from the French).

THanks for your help, as I'm stuck...



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Ignatius Gorin
Re: Black bckgrnd on Alpha 4444+ FCP export
on Nov 17, 2012 at 10:28:13 am

Erm... sorry, it's set to STRAIGHT...

Still stuck, pulling my hair on this...



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Rafael Amador
Re: Black bckgrnd on Alpha 4444+ FCP export
on Nov 17, 2012 at 3:06:18 pm

Hi Ignatius,
I've heard often complains from people having problems to export movies with alpha even when apparently they have all the sequence parameters OK.
Make a simple test:
- Open a new sequence (whatever the settings), and change the codec for Prores444/Colors+.
- Open the basic Text tool in the Viewer (you get "Sample Text on it) and drag it to the time-line (V1).
- Export (QT current setting) and then re-import to FC. See how it works the Alpha channel when you lie it on top of any picture on any sequence.
rafael

http://www.nagavideo.com


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Ignatius Gorin
Re: Black bckgrnd on Alpha 4444+ FCP export
on Nov 17, 2012 at 4:05:35 pm

THanks for your help Rafael --

Here it DOES work. What can I try next ? Convert my own sequence to 4444+ before exporting? (Can't try that right now, but I will later if you say that's the way to go).

THANKS.



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Rafael Amador
Re: Black bckgrnd on Alpha 4444+ FCP export
on Nov 17, 2012 at 6:03:25 pm

Yes.
Set your sequence codec to Prores 444 Millions+.
In the sequence setting, set also "Render all YUV material in High Precision".
rafael

http://www.nagavideo.com


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Ignatius Gorin
Re: Black bckgrnd on Alpha 4444+ FCP export
on Nov 17, 2012 at 6:28:54 pm

YES! That worked. Thanks a million, that really saved me.



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