How do I trim the middle part of a video in Photo Booth?

I want to save the beginning and end portions of a Photo Booth video for export. In other words, I don't want the middle part. However, Photo Booth seems to only let me select a single portion to save - beginning, end or middle. Edit: I ended up selecting the beginning, exporting, reverting the trim and selecting the end, then exporting again. A decent stopgap for me, but obviously not a complete solution since this creates two files, so I won't add this as an answer.