Bug#484585: libpostproc51: Can't upgrade from Etch to unstable

[Reinhard Tartler]

merge 484585 484586 484587
retitle 484585 "installing ffmpeg from http://debian-multimedia.org breaks upgrades to lenny"
stop

Russell Coker <russell at coker.com.au> writes:

> Unpacking libpostproc51 (from .../libpostproc51_0.svn20080206-8_i386.deb) ...
> dpkg: error processing /var/cache/apt/archives/libpostproc51_0.svn20080206-8_i386.deb (--unpack):
>  trying to overwrite `/usr/lib/libpostproc.so.51.1.0', which is also in package libpostproccvs51
>
>
> Unpacking libavcodec51 (from .../libavcodec51_0.svn20080206-8_i386.deb) ...
> dpkg: error processing /var/cache/apt/archives/libavcodec51_0.svn20080206-8_i386.deb (--unpack):
>  trying to overwrite `/usr/lib/libavcodec.so.51', which is also in package libavcodeccvs51
>
> dpkg: error processing /var/cache/apt/archives/libavutil49_0.svn20080206-8_i386.deb (--unpack):
>  trying to overwrite `/usr/lib/libavutil.so.49', which is also in package libavutilcvs49
>
> The above came from using dselect to upgrade from Etch to unstable.

That's because you have installed packages from an unofficial package
source, most likely http://debian-multimedia.org. I acknowlede that this
is a problem, but not strictly a bug in the packages in debian.

It used to work in the past because debian has introduced a debian
specific soname on the libraries. If Christian had done so as well, you
wouldn't see the bug.

So the question remains, what can we do here:

 a) ignore this issue
 b) add Conflict/Replaces against the packages of
    http://debian-multimedia.org
 c) introduce a private soname for ffmpeg in
    http://debian-multimedia.org, similar like previously in debian.

Christian, I'd like to hear your input on this issue.

-- 
Gruesse/greetings,
Reinhard Tartler, KeyID 945348A4