[mythtv-users] python program for quickly comparing deinterlacers

[Dan Christensen]

I've written a quick and dirty python program that makes it easy to
compare deinterlacers while watching a video.  It is attached below.
Here are the comments from the top of the file:

  Usage:  Set up a playback profile named "test" with only one rule:
  
    if rez >= 0 0
  
  Put any renderers/deinterlacers you want, except leave the secondary
  deinterlacer as "none" so you'll be able to tell if the primary one
  isn't working.
  
  Make this your default playback profile.  Then start this script
  from a terminal window (e.g. a laptop remotely logged in).  (You
  may need to edit the script to provide database credentials.)
  If all is well, it will show your current settings for the test
  profile, and offer you a list of deinterlacers to choose from.  
  When you choose a deinterlacer, it will stop playback, adjust the
  database settings, pause a bit, restart playback and skip backwards.

  When you select a deinterlacer, it changes the renderers to match and
  within about a second you find yourself 15 seconds back in the same
  recording.  So you can watch the same 15 seconds over and over again
  with different deinterlacers.

  Note that this script *changes the database*.  So use it at your own
  risk.

When run, the script gives you a menu that looks like:

  Current settings:
  
  pref_cmp0            >= 0 0
  pref_decoder         ffmpeg
  pref_deint0          greedyhdoubleprocessdeint
  pref_deint1          none
  pref_max_cpus        2
  pref_osdfade         1
  pref_osdrenderer     opengl2
  pref_priority        1
  pref_videorenderer   opengl
  pref_cmp1
  pref_filters         openglbicubic
  
  Deinterlacers:
  
  0  none
  1  onefield
  2  linearblend
  3  bobdeint
  4  kerneldeint
  5  kerneldoubleprocessdeint
  6  greedyhdeint
  7  greedyhdoubleprocessdeint
  8  yadifdeint
  9  yadifdoubleprocessdeint
  10 vdpauonefield
  11 vdpaubobdeint
  12 vdpaubasic
  13 vdpaubasicdoublerate
  14 vdpauadvanced
  15 vdpauadvanceddoublerate
  s  Toggle high-quality scaling
  q  Quit
  
  Choose a deinterlacer: 

This isn't meant to be polished, and you may need to edit it for your
situation, but I found it very useful.  After receiving any feedback,
I'll post it on the wiki.

Dan

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