Playing MPEG-4 (mp4) files is a recent addition to the SOS system, and is pretty limited at present. Not all mp4 files will play on our system, but we have had good luck creating ours with either ffmpeg on Linux or QuickTime Pro on the Mac. If you have an mp4 from another source, you might try converting it with QuickTime Pro, using output settings similar to those below. Here’s a couple examples of the settings we have successfully used to create a playable mp4 from a directory of cylindrical image files.
ffmpeg is an open source, command line driven program. This example assumes the input image files are in a directory (folder) named indir and the files within are named file0001.jpg, file0002.jpg, etc.
The mp4 files must be stored somewhere in the /shared/sos/media directory tree, so they are accessible from the server on all the projector hosts. The mp4 file names must end with extension .mp4 currently. They can be played directly from the SOS user interface program sos_stream_gui without a playlist, by selecting Open MPEG-4 File… from the File menu, then navigating to and selecting the file you wish to play.
To play an mp4 from a playlist, just add it as a clip, with the datadir parameter being the mp4 file itself.
Here again, the filename must be stored somewhere in /shared, and has to end with the .mp4 extension.
There is a GUI script can be run with Linux to make a mp4 movie.