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Merging Virtual Tapes (QShell)
The edits of two virtual tapes may be combined to create a “superset” VTP using the QShell command line utility,
VTPMerge . VTPMerge enables one to edit video and audio in separate workflows and then combine them later into
a single virtual tape.
A third virtual tape file (.vtp) is created as a result of the merge process. The “superset” VTP file points to the
location of the assets of the source virtual tapes but does not duplicate their assets. Deleting either the source
VTP’s or their respective assets will corrupt the “superset” virtual tape.
Requirements
•
Two virtual tapes with the exact same settings (length, video format, etc.)
Recommendation
If the two virtual tapes were edited on different servers, all of the assets of both virtual tapes should be located in
the same parent directory on the same volume. This might require that at least one virtual tape file (.vtp) and its
project directory will need to be copied to the same parent directory of the other virtual tape.
If the virtual tape containing audio edits are transferred from another QuVIS Acuity using a removable drive and if
those assets are not copied to the same parent location of the virtual tape containing the video edits, anytime the
removable drive is removed, the “superset” VTP becomes inoperable. Storing the assets of both virtual tapes in the
same parent directory will help maintain the integrity of the “superset” VTP.
Merge Virtual Tapes
These steps assume that the source virtual tapes and their assets (project directory and media files) are located in
the same parent directory.
1.
Open a QShell command line session (RS-232 serial or Telnet).
2.
Change the working directory to the parent directory containing both source virtual tape files (.vtp).
Example: Volume:> cd project/vtp
3.
To create a merged virtual tape use the following command template:
Vtpmerge <source VTP> [<source VTP>] <destination VTP>
Example:
Volume:project/vtp> vtpmerge source1.vtp source2.vtp superset.vtp
Note: If the destination file already exists, this tool will fail unless the –replace option is specified. For
more details, see VTPMerge command usage in the QShell Command Reference Manual .
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