Visual Circuits Mantis Media Gateway, User Manual

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Updating Video Playback
116
Playlist Parsing Routine
When the Mantis copies a new playlist, it analyzes the list to
determine which MPEG video files it needs. The Mantis then
checks its own storage to determine if any of these videos are
already present. Any files that are not present are copied from the
FTP site.
For a preexisting file, the Mantis compares its file size against a
file with the same name located on the FTP site. Only if the file on
the FTP site has a different file size, does the Mantis copy it and
overwrite the pre-existing file, see page 106 for file size criteria.
Once all of the required video files are copied from the FTP site,
the Mantis begins playing the new playlist or schedule.
System Update Check
After the Mantis finishes its update routine, it searches or any valid
software updates in the
/updates
directory, in the FTP site’s
home directory: see page 107 for more information on system
update checks. If the Mantis finds a (.upd) file in the
/updates
directory, it copies the file to its hard drive and then executes the
update.
For more on the behavior of each (.upd) file refer to the software
release notes that come with the update file.