[mythtv-users] mkvmerge usage

[scram69]

Forgive me if this has been previously addressed, but I searched the
list and wiki and couldn't find it...

>From the mkvmerge man page, I get the impression that a command like:
mkvmerge -o fullmovie.mkv part1.mkv part2.mkv
should make a single .mkv file called fullmovie.mkv that concatenates
part1 and part2.

The resulting file seems to be the right size and time duration.
However when I attempt to play the result with the internal player, it
gets to the point in fullmovie.mkv where file1 ends, and the player
exits.  Attempting to skip forward from near the end of file1 into the
beginning of file two also causes the player to exit.

Are there particular flags I need to set with the command in order to
get mkvmerge to do what I want?

Thanks-
Steve