Fiddling around with the Hummy in mantenance mode, I notice something that's no doubt ben there right form the start:
humax3# ls /dev
bcmfpga mtdblock1 nexus_transport sdb4 sdf7
brcm0 mtdblock10 nexus_uart sdb5...
Now, after nearly half a decade I can reveal what the problem was.
I had IGMP snooping (unnecessarily) enabled on my BayStack 450-24T ethernet switch. And this can interfere with UPnP.
I turned it off and suddenly I could stream between the two boxes. And the problem I was actually trying to...
Run a long (off-line) disk check. That'll tell you if the HD is broken. If it is completely stuffed, well, it's hopefully still under warranty. If it isn't broken
Fix any pending sector reallocations, if there are any.
Copy all your files off.
Copy them back on again...
No, it shouldn't work (AFAIK). The Humax only play the video file - it doesn't look for others. You'll need to merge the audio track and subtitles into the video file to produce one file. I imagine ffmpeg could do it, though I have no experience of this. I suggest you do that on a PC - whilst...
Your problems sound a bit like the ones I had a few years ago, here.
In short, it could be power supply, hard drive or motherboard - you'll need to use a process of elimination. And the disk is the easiest to try first.
All of those things are configured via the WebIF or, if you prefer, could be configured by editing files via the Telnet interface. Both require a network connection. Also, I'm not completely clear how you install packages other than a network connection.
That said, if you connect the network...
I'm sure you can. However I suspect you may find Slingbox less hassle than getting the two Humax box solution working. Nevertheless, I'd be very interested in hearing how you get on as one never knows when that sort of capability might come in handy.
Personally, if I were to attempt such a...
As EEPhil says, for this sort of thing, ffmpeg is the tool to use.
If you really need MP3 (ie your player can't cope with mp2):
ffmpeg -i infile.ts -f mp3 -acodec mp3 -aq 2 -vn outfile.mp3
And if you'd prefer AAC:
ffmpeg -i infile.tx -c:a aac -q:a 2 outfile.m4a
Putting it all together (in bash...
If you copy them onto the USB and try to play them from your first machine, do they then play OK? If so, it suggests that, like the HD recordings, they're getting encrypted. The broadcasters have the option of doing that, but they don't normally do so for SD recordings. But ISTR on the HDR-FOX...