File for preset 'fastfirstpass' not found

If ever you get an error "File for preset 'fastfirstpass' not found" while converting video to MP4 try out to use libx264-faster_firstpass instead of fastfirstpass.

The presets from x264 were added to FFmpeg about six weeks ago.
These include: ultrafast, superfast, veryfast, faster, fast, medium
(x264 default), slow, slower, veryslow, and placebo.

Enjoy :-)