AS <as-2008 <at> live.cn> writes: > / Usr/local/lib/libx264.a (opencl.o): > In function `x264_opencl_load_library ': > opencl.c: (. text +0 x411): undefined reference to `dlopen ' Try --extra-ldflags=-ldl I don't think FFmpeg can know that you compiled x264 in a way that additional libraries are needed at link time. Carl Eugen