怎么先删除低版本的ffmpeg,然后用sudo apt-get install ffmpeg也安装不了啊?报错如下:
pi@raspberrypi:~ $ sudo apt-get install ffmpeg
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package ffmpeg is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source