Is there a way to determine if a file uses MPEG-4 Part 10 encoding? I have series of files which use this encoding but the file extension is the same as other file formats that we don't support so I want to positively identify for this specific encoding and I want to do this before handing it off to the player. I've search for the tag words MPEG-4, MPEG4, Part 10, AVCHD, H.264, header, signature, HDMV, as well as combinations of those words.