libavresample-dev - 7:4.1.10-0+deb10u1 main

FFmpeg is the leading multimedia framework, able to decode, encode, transcode,
mux, demux, stream, filter and play pretty much anything that humans and
machines have created. It supports the most obscure ancient formats up to the
cutting edge.
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This library is provided for compatibility reasons only.
The FFmpeg project advises to use libswresample instead.
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This package contains the development files.