RVCVXCheck CTS video recording bugfixes

Fix the following:
  * Video recorded do not have right aspect ratio on Sprout devices.
  * Video timestamp is estimated from fps ratings, which may be
    off by 5% on some devices.
  * Stretched video preview display.
  * Rotated video preview in some devices.
  * CPU goes to sleep during long analaysis.

Related bug(s):

Change-Id: I98a9b49e1f2587f1d0448ea9d1c2e229fdaee29b
4 files changed