Docker CE supports the 64-bit version of CentOS 7, and requires the kernel version to be at least 3.10. CentOS 7 meets the minimum kernel requirements, but due to the relatively low kernel version, some functions (such as overlay2 storage layer driver) cannot be used, and some functions may not be stable
System administrators usually only care about the security update part of the system when upgrading the system, and the upgrade of pure software version does not need to be rooted, because upgrading them may cause unpredictable problems. We only install the security update part of the system update.
FFmpeg is a set of open source computer programs that can be used to record, convert digital audio and video, and convert them into streams. Use LGPL or GPL license. It provides a complete solution for recording, converting, and streaming audio and video. It contains a very advanced audio/video codec library libavcodec, in order to ensure high portability and codec quality