Video Decoder by ffmpeg, inlcude cpu decoder and gpu decoder. It can read rtsp stream directly.
- opencv 3.2 version，opencv only use for test, never use for transcode and decode.
- gpu decode version need to compile ffmpeg lib by yourself. Download source code from https://github.com/FFmpeg/FFmpeg (release-n4.1), use following complie command: ./configure --enable-cuda --enable-cuvid --enable-nvenc --enable-nonfree --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64
read ffmpeg.patch, modify some ffmpeg source code, Solve the problem that the rtsp stream will receive some invalid frame when network is unstable.