VLC (I used 2.02 on the Mac, but it's cross-platform) can record the mjpeg stream. Use the wizard in the file menu to set it up. I had to go through several transcoding options before it worked for me as I couldn't get the RAW option to work, but I really did not know what I was doing. The setup worked reasonably well. You can even record/extract segments of the playback by using the Record option in the Playback window.