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Re: Alpha channel AE cs3?

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Re: Alpha channel AE cs3?
by nel johnson (nel5ta) on Feb 7, 2008 at 7:21:39 pm

Hey Hamid - Topher is correct on this.

I'd also add that it's unclear from your post how you are importing and using the video in Flash.

Creating video with transparency requires a certain type of render out of AE, typically a codec which allows for RGB plus Alpha or 'Millions+'. A lossless codec such as 'Animation' would give you this (although I'm not sure how Flash would handle a file like this). High compression codecs such generally throw away the alpha channel to save on filesize.

You could also render out to an image sequence of a type that supports transparency, maybe PNG or Photoshop.

Hope this helps.


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