Okay, I got the audio and video to mux together using Video-to-Video Converter (
http://www.videohelp.com/tools/Video...deo-Converter), but the synchronization is way off (the audio for fragment 770 was not even close to the video of fragment 770). I'm going to have to look into it when I have more time.
Give it a shot and share any ideas you come up with.
Edit:
I think the audio synchronization was my fault. I noticed that the audio leads the video by about 5-6 seconds throughout a 2-hour recording, so I'm guessing when I renumbered the files I missed an audio fragment at the beginning. I'm going to give it another go.