===== recordmydesktop
----- whole screen
recordmydesktop
--no-sound  (to skip recording sound)

----- region
recordmydesktop -x 1 -y 1 -width 800 -height 600

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recordmydesktop -windowid ${xwininfo -frame | awk '/Window id:/ {print $4}'}

Ctrl-C  to stop recording

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h264enc