Apparently, Blender has support for this codec. But I can not get my way across it. On a Mac, there are no options to select JPEG 2000, neither for images nor movie. On Windows, I did render image sequence with JPEG 2000 with Blender 2.67, But quicktime container did not have the codec. I want to render mov files with Alpha channel - thus JPEG 2000 (Animation and PNG were giving very large file sizes, and these files are to be made available for download.
Any pointers would be very helpful - horribly stuck.