Pump ffmpeg requirements to version 4.2
Debian stable is in 5.1-series and Ubuntu Focal (20.04 LTS) is in 4.2 version. FFmpeg 4.2 was release 2019.
Cleanup version checks from code
Debian stable is in 5.1-series and Ubuntu Focal (20.04 LTS) is in 4.2 version. FFmpeg 4.2 was release 2019.
Cleanup version checks from code
VideoLAN code repository instance