Logik Freeview HD PVR re-encoding

[atomcrusher]

So I hooked up my Logik's hard drive and dragged the files of a recent HD recording across from the Linux partition. For this particular program, I have an .IFO file and a .REC.NAV file in the root, then a folder containing 256MB chunk files (chunk.1, chunk.2) apart from chunk.0 which is zero bytes. No .KEYINFO file was created leading me to believe it's unencrypted, but playback and ffprobe of any of the chunk files or a concatenation of them all doesn't work.

What's the next step for converting these chunk files?

 

[Futaura]

So I hooked up my Logik's hard drive and dragged the files of a recent HD recording across from the Linux partition. For this particular program, I have an .IFO file and a .REC.NAV file in the root, then a folder containing 256MB chunk files (chunk.1, chunk.2) apart from chunk.0 which is zero bytes. No .KEYINFO file was created leading me to believe it's unencrypted, but playback and ffprobe of any of the chunk files or a concatenation of them all doesn't work.

What's the next step for converting these chunk files?

I think you'll find that everything on that partition is encrypted, if not the entire HDD. As you may know, the Logik is a Vestel T7650 box. The earlier T7300 model was unencrypted, or at least my pre-retail box was - for SD recordings it was just a matter of concatenating the chunk files and playing them with anything that supports m2ts files. But, this method did not work with the T7650. If you telnet into the box, there are references to keys either in root or on the first partition.

 

[atomcrusher]

That's a shame, but I suppose it makes sense. What are my options here then? Providing I can get access to the entire drive.

 

[Futaura]

Not sure as I've never really looked into how the encryption is implemented and whether it can be bypassed. I've not tried reading the HDD directly, but instead via telnet and transferring files using ftpput. So, as files transferred that way were corrupt/encrypted too, my guess would be that the software on the box decrypts it on playback, opposed to the kernel or filesystem encryption.

In the case of the earlier TopUp TV boxes, those were encrypted too and the drive was tied to the box (you could not access the files even by moving the drive to a box of the same type). Not sure if this is the case for the T7650 too though, but I hope not.

In summary, the only option is to crack the encryption or bypass it somehow. Actually, I wouldn't be surprised if there was a secret command to switch off encryption, but I'm not aware of one.