On Sat, 24 Jun 2017, Hans wrote:
Yeah, but this is an external 3rd party repo and not the original debian one. So it is clear, why it cannot be found.
Yeah, I see now. I totally overlooked that it was a third-party repo package. Sorry for the pointless noise. You got that right.
As far as I know, this repo is meanwhile orphaned (or is this changed in the last years?) as the multimedia packages are integrated now in the original repos of debian.
On the debian wiki, there is the DebianMultimedia/FAQ page. On that page, FAQ numbers 2.5, 2.6, 2.7, and 2.8 explain (far better than I could) the (non-)relationship of deb-multimedia.org to DebianMultimedia: https://wiki.debian.org/DebianMultimedia/FAQ
Do I miss something?
Nothing but a can of worms, AFAICT.