ffmpeg全景视频转普通视角视频的filter开发环境macos12.6brew install glfwffmpeg编译脚本./configure --cc=clang --prefix=$PWD/build --enable-libx264 --enable-filter=genericshader --enable-gpl --enable-opengl --extra-libs='-lglfw -ldl' --extra-cflags="-I/Users/taio/Downloads/x264-snapshot-20170521-2245/bui