Quote - noel, in re: RTEncoderPy, I didn't see any description of formats in its folder.
there are some auxiliary scripts referring to byte order, cyclic redundancy checks et al.

There once was a text file available decribing the format, but it's one of those things that's not been available for some time (casualty of website moves I guess) but it'll be on one of my disks somewhere, I just have to find it.