[FFmpeg-devel] Load -vpre/apre default by default

[Alexander Strange]

This improves the x264 experience by not forcing people to type '-vpre default' to get
a successful encode.

This works even if you don't specify -vcodec explicitly, although obviously you need to have
Ha default preset for the default codec for the output format being used.

Unfortunately, this command still doesn't work:
  ffmpeg -i <ifile> -vpre <something> <ofile>

i.e., you still need to specify -vcodec if you have an explicit -vpre option.