python-sipsimple (>= 3.0.0) seems to uninstallable because of
dependencies. Is there a safe and easy way to pull them in from Debian?

Regards,
Lars

# apt-get install python-sipsimple
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 python-sipsimple : Depends: libavcodec57 (>= 7:3.1.3) but it is not
installable or
                             libavcodec-extra57 (>= 7:3.1.3) but it is
not installable
                    Depends: libavformat57 (>= 7:3.1.3) but it is not
installable
                    Depends: libavutil55 (>= 7:3.1.3) but it is not
installable
                    Depends: libswscale4 (>= 7:3.1.3) but it is not
installable
                    Depends: python-otr (>= 1.2.0) but it is not going
to be installed