https://www.videolan.org/developers/x264.html
x264 is a free software library and application for encoding video streams into the H.264/MPEG-4 AVC compression format, and is released under the terms of the GNU GPL.
據說：“ ffmpeg的編碼過程其實是調用了libx264庫完成的，所以我們可以不需要ffmpeg的源代碼，直接調用libx264庫，將輸入的YUV數據編碼爲h264”
https://blog.csdn.net/qq_41051855/article/details/78664873
OpenCV採集的視頻流轉化成H264格式裸碼流
https://www.cnblogs.com/ziyu-trip/p/7075003.html
FFmpeg解碼H264裸流並轉換成opencv Mat
https://blog.csdn.net/qq_24328101/article/details/74205686