DVB-T recording doesn't work with Pro7Sat1Group(Pro7/Sat1/Kabel1/N24).
Recording of other networks works.
Recording of this network works with other progams(TerratecHomeCinema).
Never worked with any version of ProgDVB.
The result file (.mpg) is an audio file though all other channels recorded the same way result in a video file.

What format are you recording to, .mpg or .ts?

What file size do you get? With video inside, it should be around 1 GB per hour or more.
But audio only would be around 100 MB per hour.

If your file is of normal size, may well be, it's corrupted somehow, like if having bad stream IDs on the video part.
Perhaps have a try with a tool like ProjectX, to remux properly.

However, you may want to record some minutes (as .ts), upload it somewhere and send Prog a link.
I am quite sure, neither he nor me can receive your DVB-T transponder at home.
And on my Hamburg located DVB-T service, I don't have that kind of trouble.

Try record to TS and check "all streams" in record settings.

With .ts it works, thank you. Problem only with mpeg. I use ts now.