MPEG-FAQ 4.1:

Vms MPEG

The VMS MPEG viewer is built by acquiring the regular Unix-specific mpeg
source, then getting the VMS specific code.  Using this mesh of code, you
build your own VMS-compatible MPEG player.

First, get the regular UNIX Mpeg viewer per the instructions in part "c"
above.  Then get the following:

URL=ftp://mm-ftp.cs.berkeley.edu/pub/multimedia/mpeg/vms/or                     ]          ]
    [128.32.149.157]

Thanks to Terry Maton for this information.  Here is some text from him
which may be of help to VMS users:

First go to mm-ftp.cs.berkeley.edu in /pub/multimedia/mpeg and get the main
mpeg file mpeg_play.2.00.tar.Z, then cd to vms and get the file 
MPEG_PLAY-20-DECW.TAR_Z.  Now you have to decompress and tar the main file
first and then the vms file.  This means that the latest version of some
of the .c files are the correct ones for vms.