Re: Missing Shared Object File for ffmpeg

[Greg Wooledge <wooledg@eeg.ccf.org>]

On Tue, Mar 20, 2018 at 12:18:05PM -0400, Dan Norton wrote:
> >  * The output of "apt policy ffmpeg".
> 
> ffmpeg:
>   Installed: 7:3.2.10-1~deb9u1
>   Candidate: 7:3.2.10-1~deb9u1
>   Version table:
>  *** 7:3.2.10-1~deb9u1 500
>         500 http://debian.gtisc.gatech.edu/debian stretch/main amd64
>         Packages 
>         500 http://security.debian.org/debian-security
>         stretch/updates/main amd64 Packages 
>         100 /var/lib/dpkg/status
> 
> >  * The output of "aptitude why libopenal1".
> 
> i   ffmpeg        Depends libavdevice57 (>= 7:3.2.10)
> i A libavdevice57 Depends libopenal1 (>= 1.14)       

>From these, it looks like you have the stretch version of ffmpeg, and
a libopenal1 dependency that can be satisfied by the stretch version
of libopenal1.

If libopenal1 is not actually installed, then something is very wrong.
Is it possible that you have the package "installed", but something else
removed the library file?  In that case, just reinstall the package:

apt-get --reinstall install libopenal1