I only did a straight sudo apt-get install mplayer.
There is a graphical presentation that comes up after dbl-clk of
the avi file you wish to watch.
1. A large blue square with the mplayer...
I just did a straight sudo apt-get install mplayer
Here is my error message:
$ mplayer /home/pi/Dropbox/xdropbox/01-20140222161921.aviMPlayer svn r34540 (Debian), built with gcc-4.6 (C) 2000-2012...
Raspberry Pi B 2014-01-07 Raspbian fully up to date.
Installed and configured motion for surveillance.
It works just fine and creates .avi files and .jpeg.
Installed Mplayer trying to run it from...