libavdevice-dev - 7:4.3.8-0+deb11u1 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 provides a generic framework for grabbing from and rendering to
many common multimedia input/output devices, and supports several input and
output devices, including Video4Linux2, VfW, DShow, and ALSA.
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This package contains the development files.