On Fri, Jul 09, 2021 at 09:36:00PM +0200, Kampmann wrote:
The following packages have unmet dependencies:
libavcodec58 : Depends: libavutil56 (>= 10:4.1.6) but it is not going to be
installed
Depends: libc6 (>= 2.27) but 2.24-11+deb9u4 is to be
installed
This is a really powerful indicator that you've mixed sources which
are either from, or for, different Debian releases. Or mixed Debian
sources and non-Debian sources.
The "libc6 (>= 2.27)" dependency is identical to the libc6 dependency
on the *buster* (Debian 10) version of libavcodec58. (Which is a
package that does not even exist in Debian 9.) So, it looks like you've
either got a buster (Debian 10) source, or you've got some third-party
source that was meant to be used with Debian 10.
You can't use Debian 10 sources on Debian 9.