我正在尝试删除ffmpeg并安装最新版本,但我无法获得旧版本。-2 .2.1-65.el6.x86_64 conflicts with file from package ffmpeg-libpostproc- 0.6.5-1.el6.rf.x86_64from install of ffmpeg-devel-2.2.1-65.el6 .x86_64 conflicts with file from package ffmpeg-libpostprocel6.x86_64 conflicts with f