Trying to render a 720p AVI with alpha. I set it to RGB+alpha, Millions of Colors+, Cineform is set to 4:4:4 and enable alpha. When imported back into AE file type is tagged as Quicktime instead of an AVI. No alpha channel. Thumbnail of the clip is half black, half pink.

Neo 5.5.2, Cineform Codec 7.3.2, AE 10.0.2.4

Just figured it out. I was selecting AVI as the format. There is also a CineForm AVI format. When I selected that it worked. Same options either way. Is this a bug? Also, clip still is tagged as Quicktime in AE.