> I'm studying ffmpeg.I have added dxva2 to ffmpeg.exe,and it can work well > in one thread using dxva2 to decode h264 apparently ffmpeg "already has dxva"? http://ffmpeg.org/trac/ffmpeg/ticket/604 also I found the docu: https://github.com/FFmpeg/FFmpeg/blob/master/doc/multithreading.txt