libav dev and extra package are not co-installable

[Hanmac]

once again libavcodec-dev depends on libavcodec-ffmpeg56 but does not allow libavcodec-ffmpeg-extra56 which is a dependency from UbuntuStudo-audio
(it should have a OR dependency)

that result in the situation where you can either develop or hear sound but not both

the bug does happen before and again but it seems it does happen again with each Ubuntu release

[Ross Gammon (rosco2)]

I assume from your information that you just upgraded to the latest Ubuntu Studio release (15.10). Can you confirm?

It would be easier if you used ubuntu-bug to report bugs as it automatically attaches all this information (versions etc.) to the bug:
https://wiki.ubuntu.com/ReportingBugs

[Ross Gammon (rosco2)]

If my assumption is correct, the bug should be reported against the ffmpeg source package (which has replaced libav in Debian & Ubuntu Wily).

It appears that in the next version of ffmpeg (7:2.8.1), libavcodec-ffmpeg-extra56 & libavcodec-ffmpeg56 become alternative dependencies as you suggest. Wily should probably be patched the same:
https://anonscm.debian.org/cgit/pkg-multimedia/ffmpeg.git/commit/?id=c8f3616a25097bf4f02c703f31e0b38b29d1da2f

[Hanmac (hanmac)]

yes i updated my system recently and while my system is not pure ubuntu studio, it does have some of the packages
 and i didnt know that the package/source location did change

and yes your linked change would fix my problem, so ubuntu only need to update to that

[Ross Gammon (rosco2)]

Actually - status should have been "fix released", as the problem is fixed in version 7:2.8.1 which is currently in Xenial proposed.

[Hanmac (hanmac)]

hm then i think such thing should be backported to Wily too if possible

i might find even more bugs in wily which are already existed in vivid and still exist Xenial too