Hi Stephan,
I have followed he following manuals: 1) Install debian on the NAS: http://www.cyrius.com/debian/orion/d-link/dns-323/install/ 2) Install VDR on debian: (written by me :-) ) https://wiki.debian.org/VDR
The only thing is that sc does not compile on the NAS. In order to fix that I have ported it from FFdecsa to dvbcsa. I will post the solution in this thread: http://www.mail-archive.com/vdr@linuxtv.org/msg17681.html
Also the NAS is slow, but watching one encrypted show, or record two encrypted shows, or record 4 unencrypted shows works for me. SD quality, I don't receive HD here.
Please let me know about your progress.
Regards, Cedric