Looking at my script for building ffmpeg w/ x264 on osx, x264 is not the problem. Here is the ffmpeg configure line: ./configure --disable-vhook --disable-mmx

Looking at my script for building ffmpeg w/ x264 on osx, x264 is not the problem. Here is the ffmpeg configure line: ./configure --disable-vhook --disable-mmx --enable-pthreads --enable-gpl --enable-libx264 --extra-ldflags="-l m" Getting all these configure options right was a real PITA. The ffmpeg mailing list is a very hostile environment and I found most of it from random googling. My configure line for x264 was: ./configure So yes, you guys are all good. BTW it is a really great library. You should be proud.