Convert60ito24p

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{{FilterCat4|External_filters|Scripts|Adjustment_filters|Frame_Rate_Conversion}}
 
{{FilterCat4|External_filters|Scripts|Adjustment_filters|Frame_Rate_Conversion}}
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I've made a script that converts 60i video to 24p avoiding jerkyness in motion using blending. <br>
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{{Filter3
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since I am a PAL - man I cannot test on a wide spectrum of NTSC - sources.
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|scharfis_brain
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|
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|[http://home.arcor.de/scharfis_brain/convert60ito24p.avs convert60ito24p.avs] [http://web.archive.org/web/20121102063915/http://home.arcor.de/scharfis_brain/convert60ito24p.avs]
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|Frame Rate Converters
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|
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|6=[http://forum.doom9.org/showthread.php?s=&threadid=63368  Doom9 Thread]}}
  
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are there any volunteers, who can do tests with my script? <br>
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== Description ==
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I think, especially mode 2 of this script could be useful on non decimatable animes...
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This function converts 60fps video into 24fps avoiding jerky motion.
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*'''Note:''' this method is rather old (2003), better alternatives are available.
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== usage: ==
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<br>
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== Requirements ==
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import(convert60ito24p.avs)
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* AviSynth 2.5.8 or later
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loadplugin(your 60fps deinterlacer like dgbob or tomsbob)
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* [[Progressive]] input only
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xxxsource("clip")
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* Supported color formats: [[RGB24]], [[RGB32]], [[YUY2]]
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your60fpsdeinterlacer()
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<br>
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convert60ito24p(2,0)
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== [[Script variables|Syntax and Parameters]] ==
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{{Template:FuncDef|convert60ito24p (clip video, int mode, int offset)}}
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=== mode - parameter: ===
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<br>
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------------------
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<br>
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0 uses simple 24 out of 60 selection -> jerky motion
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:{{Par2|video|clip| }}
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::Input clip.
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Code:
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<br>
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:{{Par2|mode|int| }}
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.A B C D E F G H I J K L M N O P Q R  <- input sequence
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::Mode 0 does a simple 2 out of 5 selection, which results in jerky motion. Use this mode for comparing purposes.
 +
::Modes 1 to 3 are using blending of nearby Frames to avoid jerkyness and "simulate" motionblur. The higher the mode-number the more motionblur will be made and thus the motion gets smoother. Modes 2 and 3 are only recommended with a shutterspeed of 1/60sec. With shorter shutter speeds use Mode 1.
 +
::*<code>mode=0</code> : uses simple 24 out of 60 selection -> jerky motion.
 +
<ul><DD><DD><pre style="width: 100%;">
 +
A B C D E F G H I J K L M N O P Q R  <- input sequence
 
   |    |  |    |  |    |  |    <- | = direct copy
 
   |    |  |    |  |    |  |    <- | = direct copy
 
   1    2    3    4    5    6    7    <- resulting output sequence
 
   1    2    3    4    5    6    7    <- resulting output sequence
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</pre></ul>
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1 introduces a blending of every other frame from its nearest neighbors
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::*<code>mode=1</code> : introduces a blending of every other frame from its nearest neighbors. This mode delivers a non-jerky motion and should be used with shutter speeds below 1/60sec! ie. 1/120 or shorter.
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<ul><DD><DD><pre style="width: 100%;">
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Code:
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A B C D E F G H I J K L M N O P Q R  <- input sequence
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.A B C D E F G H I J K L M N O P Q R  <- input sequence
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   |  \ /  |  \ /  |  \ /  |    <- | = direct copy ; \ / = 50:50 blending
 
   |  \ /  |  \ /  |  \ /  |    <- | = direct copy ; \ / = 50:50 blending
 
   1    2    3    4    5    6    7    <- resulting output sequence
 
   1    2    3    4    5    6    7    <- resulting output sequence
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</pre></ul>
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this mode delivers a non-jerky motion and should be used with shutter speeds below 1/60sec!
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::*<code>mode=2</code> : uses blending on every frame, 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 completely  eliminates remained line flickering of the deinterlacing!
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ie. 1/120 or shorter
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<ul><DD><DD><pre style="width: 100%;">
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A B C D E F G H I J K L M N O P Q R   <- input sequence
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2 uses blending on every frame like this:
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Code:
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.A B C D E F G H I J K L M N O P Q R <- input sequence
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   \|/  \ /  \|/  \ /  \|/  \ /  \|/  <- \|/ = 25:50:25 blending ; \ / = 50:50 blending
 
   \|/  \ /  \|/  \ /  \|/  \ /  \|/  <- \|/ = 25:50:25 blending ; \ / = 50:50 blending
 
   1    2    3    4    5    6    7    <- resulting output sequence
 
   1    2    3    4    5    6    7    <- resulting output sequence
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</pre></ul>
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mode 2 is ideal for shutter speed of 1/60 sec
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::*<code>mode=3</code> : similar to mode 2 but with more motion blur.
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since it simulates very close the 24p (1/24sec) motion blur
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::*Any other number given to mode just returns the original (60fps) input clip.
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and thus giving a really smooth 24p - motion
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<br>
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as a positive side-effect, this mode reduces noise and nearly comletely
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:{{Par2|offset|int| }}
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eliminates remained line flickering of the deinterlacing!
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::Apply an offset for selecting the 2 out of 5 frames - pattern.
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<br>
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every other number given to mode delivers the the input directly to the output (60fps)
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== Examples ==
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  Import("convert60ito24p.avs")<br>
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=== offset - parameter: ===
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  [[AviSource]]("blah.avi")
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--------------------
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  QTGMC() # or any other double frame rate deinterlacer
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here you can apply a offset for selecting the 2 out of 5 frames - pattern.
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  convert60ito24p(2,0)
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<br>
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function convert60ito24p(clip video, int mode, int offset)
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{
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work = assumefieldbased(video)
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out = (mode==3) ? interleave (
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  \  selectevery(
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  \  overlay(trim(work, 1, 0),
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    \  overlay(work, trim(work, 2, 0), mode="blend", opacity=0.5),
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    \  mode="blend", opacity=0.5), 5, 0 + offset),
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  \  selectevery(
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  \  overlay(
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    \  overlay(work, trim(work, 3, 0), mode="blend", opacity=0.5),
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    \  overlay(trim(work, 2, 0), trim(work, 1, 0), mode="blend", opacity=0.5),
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    \  level = 170), 5, 2 + offset)) :
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\ (mode==2) ? interleave(
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  \ selectevery(
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    \  overlay(trim(work, 1, 0),
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    \  overlay(work, trim(work, 2, 0), mode="blend",opacity=0.5),
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    \  mode="blend",opacity=0.5), 5, 0 + offset),
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  \  selectevery(
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    \  overlay(work, trim(work, 1, 0), mode="blend",opacity=0.5), 5, 3 + offset)) :
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\  (mode==1) ? interleave(
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  \  selectevery(trim(work, 1, 0), 5, 0 + offset),
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  \  selectevery(overlay(work, trim(work, 1, 0), mode="blend",opacity=0.5), 5, 3 + offset)) :
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\  (mode==0) ? selectevery(work, 5, 1 + offset, 4 + offset) : work
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assumeframebased(out)
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}
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==External Links ==
 
==External Links ==
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* [http://forum.doom9.org/showthread.php?s=&threadid=63368 Convert60ito24p thread in doom9]
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* [http://forum.doom9.org/showthread.php?s=&threadid=63368 Doom9 Forum] - Convert60ito24p discussion.
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* [http://home.arcor.de/scharfis_brain/60ito24p.html scharfis_brain's 60ito24p webpage]
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* [http://home.arcor.de/scharfis_brain/60ito24p.html scharfis_brain's website][http://web.archive.org/web/20121101034135/http://home.arcor.de/scharfis_brain/60ito24p.html] - Convert60ito24p webpage.
 
<br>
 
<br>
 
<br>
 
<br>
 
-----------------------------------------------
 
-----------------------------------------------
 
'''Back to [[External_filters#Frame_Rate_Conversion|External Filters]] &larr;'''
 
'''Back to [[External_filters#Frame_Rate_Conversion|External Filters]] &larr;'''

Revision as of 20:04, 8 March 2015

Abstract
Author scharfis_brain
Version
Download convert60ito24p.avs [1]
Category Frame Rate Converters
License
Discussion Doom9 Thread

Contents

Description

This function converts 60fps video into 24fps avoiding jerky motion.

  • Note: this method is rather old (2003), better alternatives are available.


Requirements


Syntax and Parameters

convert60ito24p (clip video, int mode, int offset)

clip  video =
Input clip.


int  mode =
Mode 0 does a simple 2 out of 5 selection, which results in jerky motion. Use this mode for comparing purposes.
Modes 1 to 3 are using blending of nearby Frames to avoid jerkyness and "simulate" motionblur. The higher the mode-number the more motionblur will be made and thus the motion gets smoother. Modes 2 and 3 are only recommended with a shutterspeed of 1/60sec. With shorter shutter speeds use Mode 1.
  • mode=0 : uses simple 24 out of 60 selection -> jerky motion. 
     
 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
  • mode=1 : introduces a blending of every other frame from its nearest neighbors. This mode delivers a non-jerky motion and should be used with shutter speeds below 1/60sec! ie. 1/120 or shorter. 
     
 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
  • mode=2 : uses blending on every frame, 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 completely eliminates remained line flickering of the deinterlacing! 
     
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=3 : similar to mode 2 but with more motion blur.
  • Any other number given to mode just returns the original (60fps) input clip.


int  offset =
Apply an offset for selecting the 2 out of 5 frames - pattern.


Examples 

Import("convert60ito24p.avs")

AviSource("blah.avi")
QTGMC() # or any other double frame rate deinterlacer
convert60ito24p(2,0)


External Links



Back to External Filters ←

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