It looks like you got exactly the same kind of files I got, and I believe we're both using the same method. Mine were named just like yours, ending in "Seg1-Frag[sequence number]" with no extension.
Based on KSV's wiki link (
https://github.com/K-S-V/Scripts/wiki) under "
Offline fragment processing", I decided to rename them all to the form 1.f4f, 2.f4f, 3.f4f, and so on (I use Flexible Renamer to make it a very quick and simple operation), but the wiki states that the extension is optional.
I opened up a command window in the folder with all the fragment files and simply typed "php AdobeHDS.php". That's it - the resulting file, named Joined.flv, was created almost instantaneously even though the 20-minute video was over 500 MB in size.
Now we just have to figure out how to get it with audio...
Edit:
Okay, I've got it. I'm in the process of downloading 2000 audio and 2000 video fragments right now so I can play with portions of them. The first thing I'm going to try is join some audio files with AdobeHDS.