https://blog.niekun.net/archives/891.html zh-CN https://trac.ffmpeg.org/wiki/CompilationGuide/UbuntuUbuntu 14.04add ppa：https://launchpad.net/~mc... Thu, 01 Jan 1970 08:00:00 +0800 Thu, 01 Jan 1970 08:00:00 +0800