libmlt++3 binary package in Ubuntu Focal riscv64

 MLT is an open source multimedia framework, designed and developed for
 television broadcasting. It provides a toolkit for broadcasters, video
 editors, media players, transcoders, web streamers and many more types of
 applications. The functionality of the system is provided via an assortment
 of ready to use tools, xml authoring components, and an extendible plug-in
 based API.
 .
 This package contains the files necessary for running applications that
 use the MLT multimedia framework C++ wrapper.

Source package