libgstreamer-ocaml-dev 0.3.0-2build1 (arm64 binary) in ubuntu focal

 This package provides an interface to the GStreamer library for
 OCaml programmers.
 .
 GStreamer is a streaming media framework, based on graphs of filters
 which operate on media data. Applications using this library can do
 anything from real-time sound processing to playing videos, and just
 about anything else media-related.
 .
 This package contains all the development stuff you need to develop
 OCaml programs which use ocaml-gstreamer.