Is there a documentation for reading Quicktime MOV file without using Quicktime SDK?
Wotsit.org has 4 documents about the MOV file format.
Apple has released a QuickTime File Format Specification.
Or, you can just put a wrapper around an existing library such as Libavcodec like mPlayer does.
Have a look at the source for mplayer, ffmpeg, vlc.
Should be some kind of documentation there.