Yeah, if you scroll through the topic I mentioned 
, you’ll see a description of the way the 1-minute-increment files are organized on the microSD card. In that same topic, I wrote about how I attempted (but was unsuccessful) to concatenate the files using VLC but was able to do it with FFMpeg—but using FFMpeg I had to change the audio encoding. The original poster in that topic apparently had success with Avidemux, but I haven’t used that software.
I’ll make two other recommendations:
- I don’t know what OS you’re using (I’m on Linux), but if you’re a Windows user, then Ninite might be a good place to find and try some free multimedia applications that might do what you need.
- There’s a Wishlist item that addresses your initial topic, so you could swing over there and give it a vote: