On 2012-09-19 14:57, wtfux wrote: > Is there a reason why I can't set --qpfile with -x264opts? Both x264 and > libx264 are built from the same source. Yes, it is quite simple: libx264 has no such option. The qpfile is a feature of the command line encoder (x264.exe). I don't know of a way to do the same using ffmpeg.