User`s guide

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5: Adding and Removing Clips
Overview of Adding Clips Procedure
This section provides a procedural overview of the tasks involved in adding clips to the
SGI Media Server.
The following sections explain the steps in the following procedure in greater detail.
To add clips to the cache, use the following procedure.
1. Copy media to the SGI Media Server.
You must use a real-time filesystem. The vtrftp command included with Video
Server Technology (VST) works in conjunction with the vtrftpd daemon, which is
installable from the VST image. Use get, the familiar FTP command, with vtrftp
to add files to the server.
Note: Before ingesting or transferring (via FTP) clips to your server, ensure that a clip
with the same name does not already reside in the clip cache. Attempting to
overwrite a clip without first deleting it could result in corrupt clips and/or
unexpected behavior.
For more information, see “Adding Clips to the SGI Media Server” on page 68.
2. Register the clip with the SGI Media Server.
Clips are registered automatically at VST startup. At times, however,VST may not
auto detect a clip because of an unrecognized format. In that case or if you want to
notify the SGI Media Server more quickly or if you have added clips to the system
in a different way from those listed in step 1, use one of the following options:
• Use the Multiport Video Computer Protocol (MVCP) command CADD.
• Use the vtrclip tool.
Caution: The clip cache is critical to proper SGI Media Server execution. Native UNIX
filesystem operations against clip cache components—specifically, clip content and index
files—will corrupt (possibly permanently) the cache structure. Doing so may lead to
adverse or inconsistent SGI Media Server operation. Therefore, you must use the
vtrutil utility and the other VST commands exclusively to manipulate clip content
!