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I have an animation I've exported from Flash Pro CS6 as a MOV file with an alpha channel (ignore stage), and I want to do some editing in AE CS6. When I go to import the MOV as Strait-Unmatted, I do get a transparent background, however when I scrub the playhead with transparency grid toggled, a black background appears behind my animation.

I've tried a number of methods found here and elsewhere on the web including keying out black with luma key, but results were undesirable. Is there a way to get rid of the black behind my animation in AE without effecting the rest of my animation? Or is there an export setting I'm missing in Flash Pro?

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migrated from graphicdesign.stackexchange.com May 21 '12 at 16:07

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3 Answers

Seeing as this appears to be a bug, my only suggestion is to export it as a PNG sequence. At my work we always transfer from Flash to AE as a PNG sequence, as we find MOV notoriously unreliable and buggy.

If you need to retain an audio track, try exporting that separately as a WAV or MP3 and placing it on your timeline in AE.

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Sometimes you can pick number of colors for output like 256, if the option doesn't have a + symbol after it, it doesn't actually output the matte properly.
Or at least I've had a similar problem when outputting stuff with a trasnparency in AE

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In AFX import MOV with options: "Premultiplied - Matted with color" and select black or white color

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