pljvaldez, thanks.
I added this line
deb
http://www.debian-multimedia.org unstable main
to the /etc/apt/sources.list text file
then
aptitude update
It tries to install the 3.4 package. How do I force it to install 3.5 from unstable?
I assume the repository will take care of the dependencies, that is?
(Reading database ... 71597 files and directories currently installed.)
Unpacking mozilla-mplayer (from mozilla-mplayer_3.50-0.0_i386.deb) ...
dpkg: dependency problems prevent configuration of mozilla-mplayer:
mozilla-mplayer depends on libc6 (>= 2.7-1); however:
Version of libc6 on system is 2.3.6.ds1-13etch5.
mozilla-mplayer depends on libgcc1 (>= 1:4.2.1); however:
Version of libgcc1 on system is 1:4.1.1-21.
mozilla-mplayer depends on libglib2.0-0 (>= 2.14.0); however:
Version of libglib2.0-0 on system is 2.12.4-2.
mozilla-mplayer depends on libgtk2.0-0 (>= 2.12.0); however:
Version of libgtk2.0-0 on system is 2.8.20-7.
mozilla-mplayer depends on libstdc++6 (>= 4.2.1); however:
Version of libstdc++6 on system is 4.1.1-21.
dpkg: error processing mozilla-mplayer (--install):
dependency problems - leaving unconfigured
Errors were encountered while processing:
mozilla-mplayer
Thanks pljvaldez for assisting me.