如何在 CentOS 7上安装和使用 FFmpeg

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1. sudo yum install epel-release
   

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1. sudo yum localinstall --nogpgcheck https://download1.rpmfusion.org/free/el/rpmfusion-free-release-7.noarch.rpm
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1. sudo yum install ffmpeg ffmpeg-devel
   

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1. ffmpeg -version
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