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export to quicktime renders with black background _ no alpha channel

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donald thompson
export to quicktime renders with black background _ no alpha channel
on Oct 13, 2005 at 1:09:30 pm

I have had trouble the last 2 weeks exporiting quicktime movies with alpha channels. The movie export settings are:

alpha _ straight
compression type _ DV/DVCPRO
Lower Field
High Quality
better quality field rendering

I have reset the factory settings and reset tab setting.

Thanks in advance for your responses.


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donald thompson
Re: cannot export to quicktime renders with alpha channel
on Oct 13, 2005 at 3:22:35 pm

The previous message should have includedl: Does anyone know why I cannot export a QT movie with the alpha channel?


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MarkMc
Re: cannot export to quicktime renders with alpha channel
on Oct 14, 2005 at 11:41:14 am

Dv codecs don't contain alpha channels Choose the animation or none for codec.


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donald thompson
Re: cannot export to quicktime renders with alpha channel
on Oct 14, 2005 at 1:25:04 pm

I have tried the animation and "none" settings and the QT file still renders with a black backgound. Viewing the composite window while playing down the timeline I see the checkerboard pattern. When the movie file is rendering the black background shows in the composite window during the render.


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Tim Rice
Re: cannot export to quicktime renders with alpha channel
on Oct 14, 2005 at 2:01:58 pm

When rendering with the animation codec make sure million colors + is highlighted (the plus means alpha channel).
HTH,
Tim


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donald thompson
Re: cannot export to quicktime renders with alpha channel
on Oct 17, 2005 at 3:45:15 pm

Millions+ was the answer. Thanks so much.


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