You can use the MVS to edit media files (or "clips"). You can either crop a newly recorded file before saving it, or specify that only a portion of a saved file should play.
You can crop a file - remove a specified number of seconds from the beginning or end of a file open for record - before saving it.
Note: The audio or video cropped is deleted from the file and cannot be retrieved.
To crop a file:
Before you play a media file you can specify that you want to play only a portion of it.
To select a portion of clip for playing:
In the Edit menu, click Set PlayWindow. This displays the Set PlayWindow dialog box.
Enter the Start and End times of the portion in milliseconds.
Click OK to confirm the clip length.
When you play the clip, only the selected portion is played.
Clearing a selected portion
To set the portion to play back to its original value (entire clip): from the Edit menu, click ClearPlayWindow.