First of all, sorry for my english (hope you ll understand) hihi !!!
I use 4 cameras to make a movie (lengh of 25 minutes).
I use a green screen, and now my video is "finished" in premiere(video editing, animations, etc..), but the keying in "premiere pro" is not done well with "UltraKey." (cause my camera is not a professional one i think, I use MTS files)
So, i had a idea, I would like to use the "keying" in Ae (and that s very very better), I export my video RGB + ALPHA and after i ll import it in "premiere." (it s really great)
BUT : My video file in MTS (rush) is 2 GB ... I use the keying in Ae, then I export it in Quicktime animation, or AVI with RGB + ALPHA and the problem is that the output file is more than 200 GB weigh for 25 minutes.. it s too heavy... (and i have 4 cameras more).
Does it exist a "codec" i could use in Ae that allows me to export "RGB + ALPHA" who the file will be lighter than 200 Go ???