Another reference:

https://forum.videolan.org/viewtopic.php?t=70719


On 21 April 2016 at 11:43, David Hare <davidahare@???> wrote:
> I needed to install mpv, which failed with this error:
>
> :~$ mpv '/my/file.mp4'
> mpv was compiled and linked against a mixture of Libav and FFmpeg
> versions. This won't work and will most likely crash at some point.
> Exiting.
>
> This took me quite some time to debug. The reason appears to be
> incompatibility with the version and dependencies from "deb
> http://packages.devuan.org/merged" (which I use exclusively, except
> for special purposes).
>
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=753090
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=785650
>
> I noticed that quite a few packages originating from deb-multimedia
> are on my system, installed from "/merged".
>
> My quick fix was install mpv direct from deb-multimedia (but yet
> another 3rd-party repo to configure)
>
> Packages from deb-multimedia have also been reported and seen here to
> break vlc also at various times in the past.
>
> What is, or will be, official Devuan policy on this?