http://ffmpeg.org/ffmpeg.html

http://dranger.com/ffmpeg/ffmpeg.html
    https://habr.com/ru/company/edison/blog/502844/
    https://habr.com/ru/company/edison/blog/500402/

https://webhamster.ru/mytetrashare/index/mtb0/1476865195r6xkzetish
https://webhamster.ru/mytetrashare/index/mtb0/14769541153fhn74se36