[MPlayer-users] Unsplit file for playback

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I have a Matroska/H.264 movie splitted into two pieces due to vfat partition
limitations. Parts were created with split (GNU coreutils) therefore they
are not valid streams by themselves (although the first one is playable and
even seekable).

I'd like to play the movie without unsplitting it's parts to some other
filesystem.

I already tried pipes

cat *.mkv | mplayer -noidx -
cat *.mkv | mplayer -demux mkv -

but the thing is they don't allow seeking.

Would it be possible to provide some sort of virtualization for mplayer so
that it sees two files as they were one?

I use GNU/Linux.