View source for Convert60ito24p

{{FilterCat4|External_filters|Scripts|Adjustment_filters|Frame_Rate_Conversion}}
I've made a script that converts 60i video to 24p avoiding jerkyness in motion using blending. <br>
since I am a PAL - man I cannot test on a wide spectrum of NTSC - sources.

are there any volunteers, who can do tests with my script? <br>
I think, especially mode 2 of this script could be useful on non decimatable animes...

== usage: ==

 import(convert60ito24p.avs)
 loadplugin(your 60fps deinterlacer like dgbob or tomsbob)
 xxxsource("clip")
 your60fpsdeinterlacer()
 convert60ito24p(2,0)

=== mode - parameter: ===
------------------
0 uses simple 24 out of 60 selection -> jerky motion

Code:

.A B C D E F G H I J K L M N O P Q R  <- input sequence
   |     |   |     |   |     |   |    <- | = direct copy
   1    2    3    4    5    6    7    <- resulting output sequence

1 introduces a blending of every other frame from its nearest neighbors

Code:

.A B C D E F G H I J K L M N O P Q R  <- input sequence
   |   \ /   |   \ /   |   \ /   |    <- | = direct copy ; \ / = 50:50 blending
   1    2    3    4    5    6    7    <- resulting output sequence

this mode delivers a non-jerky motion and should be used with shutter speeds below 1/60sec!
ie. 1/120 or shorter

2 uses blending on every frame like this:

Code:

.A B C D E F G H I J K L M N O P Q R  <- input sequence
  \|/  \ /  \|/  \ /  \|/  \ /  \|/   <- \|/ = 25:50:25 blending ; \ / = 50:50 blending
   1    2    3    4    5    6    7    <- resulting output sequence

mode 2 is ideal for shutter speed of 1/60 sec
since it simulates very close the 24p (1/24sec) motion blur
and thus giving a really smooth 24p - motion
as a positive side-effect, this mode reduces noise and nearly comletely
eliminates remained line flickering of the deinterlacing!

every other number given to mode delivers the the input directly to the output (60fps)

=== offset - parameter: ===
--------------------
here you can apply a offset for selecting the 2 out of 5 frames - pattern.

 function convert60ito24p(clip video, int mode, int offset)
 {
 work = assumefieldbased(video)
 
 out = (mode==3) ? interleave (
 \  selectevery(
   \  overlay(trim(work, 1, 0),
     \  overlay(work, trim(work, 2, 0), mode="blend", opacity=0.5),
     \  mode="blend", opacity=0.5), 5, 0 + offset),
 \  selectevery(
   \  overlay(
     \  overlay(work, trim(work, 3, 0), mode="blend", opacity=0.5),
     \  overlay(trim(work, 2, 0), trim(work, 1, 0), mode="blend", opacity=0.5),
     \  level = 170), 5, 2 + offset)) :
 
 \  (mode==2) ? interleave(
   \  selectevery(
     \  overlay(trim(work, 1, 0),
     \  overlay(work, trim(work, 2, 0), mode="blend",opacity=0.5),
     \  mode="blend",opacity=0.5), 5, 0 + offset),
   \  selectevery(
     \  overlay(work, trim(work, 1, 0), mode="blend",opacity=0.5), 5, 3 + offset)) :
 
 \  (mode==1) ? interleave(
   \  selectevery(trim(work, 1, 0), 5, 0 + offset),
   \  selectevery(overlay(work, trim(work, 1, 0), mode="blend",opacity=0.5), 5, 3 + offset)) :
 
 \  (mode==0) ? selectevery(work, 5, 1 + offset, 4 + offset) : work
 
 assumeframebased(out)
 }

==External Links ==
* [http://forum.doom9.org/showthread.php?s=&threadid=63368 Convert60ito24p thread in doom9]
* [http://home.arcor.de/scharfis_brain/60ito24p.html scharfis_brain's 60ito24p webpage]
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