Re: Missing Shared Object File for ffmpeg
On Tue, 20 Mar 2018 13:42:24 -0500
David Wright <deblis@lionunicorn.co.uk> wrote:
> On Tue 20 Mar 2018 at 13:47:42 (-0400), Dan Norton wrote:
> > On Tue, 20 Mar 2018 12:59:21 -0400
> > Greg Wooledge <wooledg@eeg.ccf.org> wrote:
> >
> > > 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
> > >
> >
> > That did it - thanks, Greg!
> >
> > But what does this do that apt purge/install of ffmpeg does not?
>
> You posted:
>
> # apt purge ffmpeg
> # apt autoremove
> # apt install ffmpeg
>
> but you didn't show your working. You should check out what happened
> by looking at /var/log/apt/history.log to see if libopenal1 was
> affected by this command sequence. For a start, other packages might
> depend on libopenal1, preventing its auto-removal.
>
The broken system was installed in December 2017. Looking at all the
logs in /var/log/apt/history* (extracting the ones that were
archived) and running:
dan@deb9:~/apt.logs$ grep -rnw '.' -e 'libopenal1' | less
...there is one hit, other than today's --reinstall and that is an
install:
Start-Date: 2017-12-17 21:29:03
Commandline: /usr/sbin/synaptic
Requested-By: dan (1200)
Install: [...]
libopenal1:amd64 (1:1.17.2-4+b2, automatic), # e pluribus unum
[...]
> Then of course there's the investigation of why it wasn't
> installed correctly in the first place, and what was happening
> during the "several attempts" at installing ffmpeg.
>
Apparently nothing during these attempts involved libopenal1, according
to the logs in /var/log/apt/ - is there anywhere else that could shed
light on this?
- Dan
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