CHECK_WITH([nv],[nvenc/nvdec ffnvcodec api],[NV],[yes])
CHECK_WITH([cuda],[nv cuda plugins],[CUDA],[auto])
CHECK_WITH([clang],[use clang instead of gcc/g++],[CLANG],[no])
CHECK_WITH([nv],[nvenc/nvdec ffnvcodec api],[NV],[yes])
CHECK_WITH([cuda],[nv cuda plugins],[CUDA],[auto])
CHECK_WITH([clang],[use clang instead of gcc/g++],[CLANG],[no])