I have same problem and additionally xvidcap --aucodec-help said binary has no audio support.
I compiled from source and now it works - with sounds.
svn co https://xvidcap.svn.sourceforge.net/svnroot/xvidcap xvidcap
#e.g. revision 318 works
cd xvidcap/trunk/
./autogen.sh
#install missing dev-libraries and autogen.sh again
fakeroot debian/rules binary
sudo dpkg -i ../xvidcap_1.1.7_amd64.deb
64bit Jaunty.
I have same problem and additionally xvidcap --aucodec-help said binary has no audio support.
I compiled from source and now it works - with sounds.
svn co https:/ /xvidcap. svn.sourceforge .net/svnroot/ xvidcap xvidcap 1.1.7_amd64. deb
#e.g. revision 318 works
cd xvidcap/trunk/
./autogen.sh
#install missing dev-libraries and autogen.sh again
fakeroot debian/rules binary
sudo dpkg -i ../xvidcap_