/usr/share/doc/ is in libav-tools 4:0.8.17-0ubuntu0.12.04.2.
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/usr/share/doc/libav-tools/html/
/usr/share/doc/libav-tools/
/usr/share/doc/libav-tools/examples/
/usr/share/doc/libav-tools/examples/recordshow.sh
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/usr/share/doc/libav-tools/html/general.html
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/usr/share/doc/libav-tools/copyright
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/usr/share/doc/libav-tools/README.Debian.gz