Is there an app that can split an H.264 file? I know it's not an editing format, but I simple want to break a file up into multiple pieces. Doesn't have to be all that accurate either (say within 20 ...

I have an h264-encoded file that is in an mkv container. Unfortunately, as nice as an open container format is, I have yet to find a player than can handle it as well as and avi or mp4 container. So, ...