I got a new MacBook in March, everything is great except for my iSight camera in Photo Booth. The camera takes photos, does different effects, and records video. There is one problem for when i take videos. It deletes parts of my video out of nowhere. For example, say i shoot a seven minute video with Photo Booth. Then, when i click Stop and play the video, it shows up as 18 seconds!!! Is this a bug or is there something wrong with my macbook?