视频加密

ffmpeg -i decryption.mp4 -vcodec copy -acodec copy -encryption_scheme cenc-aes-ctr -encryption_key c7e16c4403654b85847037383f0c2db3 -encryption_kid a7e61c373e219033c21091fa607bf3b8 encryption.mp4

视频解密

播放

ffplay -i encryption.mp4 -decryption_key c7e16c4403654b85847037383f0c2db3

提取

ffmpeg -decryption_key c7e16c4403654b85847037383f0c2db3 -i encryption.mp4 -c copy  decryption.mp4

参考：https://www.zybuluo.com/ltlovezh/note/1769388#:~:text=%E5%8A%A0%E5%AF%86%E4%B8%80%E4%B8%AA%E6%96%87%E4%BB%B6%EF%BC%9A%20ffmpeg%20-i%20decryption.mp4%20-vcodec%20copy%20-acodec,copy%20-encryption_scheme%20cenc-aes-ctr%20-encryption_key%20c7e16c4403654b85847037383f0c2db3%20-encryption_kid%20a7e61c373e219033c21091fa607bf3b8%20encryption.mp4