libav-extra-dbg 6:0.8.4ubuntu1 (amd64 binary) in ubuntu raring

 Libav is a complete, cross-platform solution to decode, encode, record,
 convert and stream audio and video.
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 This package contains debug data of the Libav related shared libraries.
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 Most people will not need this package. Please install it to produce useful
 stacktraces to help debugging the Libav library.