Raspberry Pi 4B installed ffmpeg-4.2.6 with OpenCV – 3.4.16

        1. System:

       2. Install H264

   wget https://code.videolan.org/videolan/x264/-/archive/master/x264-master.zip
   # 进入文件
   cd x264
   ./configure --enable-static --enable-shared --prefix=/usr/local/x264
   make -j4
   sudo make install

        3. Install ffmpeg

   wget https://github.com/FFmpeg/FFmpeg/archive/refs/tags/n4.3.6.zip
   cd ffmpeg
   ./configure --enable-gpl --enable-libx264 --prefix=/usr/local/ffmpeg --enable-shared --enable-ffplay
   make -j4
   sudo make install

        4、opencv

sudo apt-get install build-essential libgtk2.0-dev libavcodec-dev libavformat-dev libjpeg.dev libtiff5.dev libswscale-dev


https://github.com/opencv/opencv/archive/refs/tags/3.4.16.zip

unzip 3.4.16.zip

mkdir build 
 
cd build
 
cmake -D CMAKE_BUILD_TYPE=Release -D OPENCV_GENERATE_PKGCONFIG=ON -D CMAKE_INSTALL_PREFIX=/usr/local -DBUILD_TIFF=ON ..

make -j4

make install

        4. Test

ffmpeg -i 11_test.wmv -y -qscale 0 -vcodec libx264 test.mp4

        5, reference

Install ffmpeg dynamic library under Linux, and import Qt_ffmpeg to compile dynamic library_Xuanyan Ruliu's Blog-CSDN Blog

Ubuntu 20.04 source code compilation and installation of OpenCV 4.7.0