Install libavformat57 by entering the following commands in the terminal:
sudo apt update sudo apt install libavformat57
Description:
FFmpeg library with (de)muxers for multimedia containers - runtime files
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. . This library provides a generic framework for multiplexing and demultiplexing (muxing and demuxing) audio, video and subtitle streams. It encompasses multiple muxers and demuxers for multimedia container formats. It also supports several input and output protocols to access a media resource. . This package contains the runtime files.
Homepage: https://ffmpeg.org/
Version: 7:3.4.2-2
Section: universe/libs