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Enable x264 visualizations during encoding. If the x264 on your
system supports it, a new window will be opened during the en-
coding process, in which x264 will attempt to present an over-
view of how each frame gets encoded. Each block type on the vi-
sualized movie will be colored as follows:
          red/pink
         intra block
     blue
         inter block
     green
     skip block
     yellow
         B-block
This feature can be considered experimental and subject to
change. In particular, it depends on x264 being compiled with
visualizations enabled. Note that as of writing this, x264
pauses after encoding and visualizing each frame, waiting for
the user to press a key, at which point the next frame will be
encoded.

--visualize
Usage: --visualize

Visualise shows you the macroblocks and motion vectors over the encoded video. Currently x264 is not compiled with this, but it will be slow and next to useless for most people. This is best left off.