anchor.diff:  ::  -video_size 1920x1200
   ::ffmpeg  -f gdigrab -r 10 -i desktop -pix_fmt yuv444p -c:v libx264 -preset:v baseline -preset:v ultrafast -tune:v stillimage -tune:v zerolatency -crf 0 %FILENAME%
   
  -ffmpeg -f gdigrab -framerate %framerate% %sizeopt% -offset_x %left% -offset_y %top% -i %input% -c:v qtrle -g %keyint% %FILENAME%
  +ffmpeg -f gdigrab -framerate %framerate% %sizeopt% -offset_x %left% -offset_y %top% -i %input% %encopts% -g %keyint% %FILENAME%
   
  
positive.code: :: found via http://stackoverflow.com/questions/1192476/format-date-and-time-in-a-windows-batch-script
  
  @ECHO OFF
  
  :: parameters
  set framerate=25
  
  set keysecs=60
  
negative.code: 
  :paramloop
  if not "%1"=="" (
  	if "%1"=="-codec" (
  		set codec=%2
  		shift
  	)
  	if "%1"=="-framerate" (
  		set framerate=%2
  		shift
  