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List of video formats supporting alpha channels

I had a request for this list, so here it is. It is a list of popular video formats that support alpha (transparency) channels. It also includes a few image formats that are used for video work, like TIFF.

I may have missed a couple, so let me know in the comments.

File FormatMaximum Alpha Bit-Depth
Apple Animation8-bit
Apple ProRes 444416-bit
Avid Meridien Compressed8-bit
Avid Meridien Uncompressed8-bit
Cineon16-bit
DPX16-bit
Maya IFF32-bit
OpenEXR32-bit
PNG16-bit
RLA32-bit
RPF32-bit
SGI16-bit
SGI RAW16-bit
Targa (TGA)8-bit
TIFF32-bit
Posted by Jon Chappell on Feb 2 2008 to Compositing, Video Editing, Visual Effects