Swap

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{{Template:Func4Def|SwapUV(clip ''clip'')|UToY(clip ''clip'')|VToY(clip ''clip'')|YToUV(clip ''clipU'', clip ''clipV'' [, clip ''clipY''])}}<br/>
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<div {{BlueBox2|40|0|3px solid purple}} >
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{{Template:Func2Def|UToY8(clip ''clip'')|VToY8(clip ''clip'')}}
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{{AvsPlusFullname}}<br>
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Up-to-date documentation: [https://avisynthplus.readthedocs.io/en/latest/avisynthdoc/corefilters/swap.html https://avisynthplus.readthedocs.io]
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</div>
  
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The first four of the above filters are available starting from v2.5. The last two from v2.60.
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Swaps chroma channels in [[YUV]] clips.
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__TOC__
  
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'''SwapUV''' swaps chroma channels (U and V) of a clip. Sometimes the colors are distorted (faces blue instead of red, etc) when loading a [[DivX]] or [[MJPEG]] clip in AviSynth v2.5, due to a bug in the decoders. You can use this filter to correct it.
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<!-- ==== Syntax and Parameters ==== -->
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<div style="max-width:62em" >
  
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'''UToY''' copies chroma U plane to Y plane. All color (chroma) information is removed, so the image is now greyscale. Depending on the YUV format, the image resolution can be changed.<br />
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{{FuncDefH4|SwapUV}}
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{{FuncDef
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|SwapUV(clip ''clip'')
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}}
  
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'''VToY''' copies chroma V plane to Y plane. All color (chroma) information is removed, so the image is now greyscale. Depending on the YUV format, the image resolution can be changed.<br />
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:Swaps ''U'' and ''V'' (chroma) channels. Corrects certain decoding errors &ndash; faces blue instead of red, etc.
  
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'''YToUV''' puts the luma channels of the two clips as U and V channels. Luma is now 50% grey. Starting from v2.51 there is an optional argument ''clipY'' which puts the luma channel of this clip as the Y channel. Depending on the YUV format, the image resolution can be changed.<br />
 
  
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'''UToY8''' (added in v2.60) is a shorthand for UToY.ConvertToY8, and '''VToY8''' (added in v2.60) is a shorthand for VToY.ConvertToY8, but faster.
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{{FuncDefH4|UToY, VToY}}
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{{Func2Def
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|UToY(clip ''clip'')
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|VToY(clip ''clip'')
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}}
  
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Starting from v2.53, YUY2 is supported. Starting from v2.60, Y8, YV411, YV16, YV24 are supported.
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:Copies ''U'' or ''V'' chroma plane to the ''Y'' luma plane.  
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:All color (chroma) information is removed, so the image is now greyscale.  
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:Depending on the color format, the image resolution can be changed &ndash; i.e.,
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:with a [[YV24]] source, '''UToY''' is the same width and height as {{FuncArg|clip}}, but
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:with a [[YV12]] source, '''UToY''' is half {{FuncArg|clip}}'s width and height.
  
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'''Example:'''
 
  
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# Blurs the U chroma channel:
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{{FuncDefH4|UToY8, VToY8}}
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video = Colorbars(512, 512).ConvertToYV12
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{{Func2Def
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u_chroma = UToY(video).Blur(1.5)
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|UToY8(clip ''clip'')
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YToUV(u_chroma, video.VToY)
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|VToY8(clip ''clip'')
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MergeLuma(video)
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}}
  
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:Shorthand for '''UToY.'''[[ConvertToY8]] and '''VToY.'''[[ConvertToY8]], but faster.
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{{FuncDefH4|YToUV}}
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{{FuncDef
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|YToUV(clip ''clipU'', clip ''clipV'' [, clip ''clipY'' [, clip ''clipA'' ] ] )
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}}
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:Copies the ''Y'' (luma channel) of {{FuncArg|clipU}} to the ''U'' channel of the output clip and the ''Y'' (luma channel) of {{FuncArg|clipV}} to the ''V'' channel of the output clip.
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:If {{FuncArg|clipY}} is given, copies the ''Y'' (luma channel) of {{FuncArg|clipY}} to the ''Y'' channel of the output clip.
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:{{AvsPluscon}} And if {{FuncArg|clipA}} is given too, copies the ''Y'' (luma channel) of {{FuncArg|clipA}} to the ''A'' channel of the output clip.
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:Depending on the color format, the image resolution can be changed.
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</div>
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==== See Also ====
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*Show [[RGB]] channels with [[ShowAlpha|ShowAlpha/Red/Green/Blue]].
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*{{AvsPluscon}} [[Extract]] for {{Deep_color}} support.
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==== Examples ====
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<div style="max-width:62em" >
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* Blur the U chroma channel
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<div {{BoxWidthIndent|32|2}} >
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video = [[ColorBars]](512, 512).[[ConvertToYV12]]
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u_chroma = '''UToY'''(video).[[Blur]](1.5)
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'''YToUV'''(u_chroma, video.'''VToY''')
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[[MergeLuma]](video)
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</div>
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* Show ''U'' and ''V'' channels stacked for illustration purposes.
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** Note that with a [[YV12]] source (like the one below), the ''U'' and ''V'' images will be half the size of the original.
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** In the ''U'' and ''V'' images, gray will be at 128{{D}} and saturated colors will appear brighter or darker.
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{{HalfBreak}}
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:[[File:SwapEx-Sintel9150.jpg]]
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<div {{BoxWidthIndent|32|2}} >
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[[StackVertical]](
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\  [[Subtitle]]("YV12 original", align=2),
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\  [[StackHorizontal]](
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\      '''UtoY'''.Subtitle("UtoY", align=2),
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\      '''VtoY'''.Subtitle("VtoY", align=2)
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\  )
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\ )
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</div>
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</div>
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==== Changes ====
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{| border="1"
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|-
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| v2.60
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| Added UToY8, VToY8.
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|-
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| v2.60
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| Added new color formats [[Y8]], [[YV411]], [[YV16]] and [[YV24]].
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|}
  
 
[[Category:Internal_filters]]
 
[[Category:Internal_filters]]
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[[Category:Levels_and_Chroma_filters]]

Latest revision as of 04:24, 17 September 2022

AviSynth+
Up-to-date documentation: https://avisynthplus.readthedocs.io

Swaps chroma channels in YUV clips.

Contents


SwapUV

SwapUV(clip clip)

Swaps U and V (chroma) channels. Corrects certain decoding errors – faces blue instead of red, etc.


UToY, VToY

UToY(clip clip)
VToY(clip clip)

Copies U or V chroma plane to the Y luma plane.
All color (chroma) information is removed, so the image is now greyscale.
Depending on the color format, the image resolution can be changed – i.e.,
with a YV24 source, UToY is the same width and height as clip, but
with a YV12 source, UToY is half clip's width and height.


UToY8, VToY8

UToY8(clip clip)
VToY8(clip clip)

Shorthand for UToY.ConvertToY8 and VToY.ConvertToY8, but faster.


YToUV

YToUV(clip clipU, clip clipV [, clip clipY [, clip clipA ] ] )

Copies the Y (luma channel) of clipU to the U channel of the output clip and the Y (luma channel) of clipV to the V channel of the output clip.
If clipY is given, copies the Y (luma channel) of clipY to the Y channel of the output clip.
AVS+ And if clipA is given too, copies the Y (luma channel) of clipA to the A channel of the output clip.
Depending on the color format, the image resolution can be changed.


[edit] See Also


[edit] Examples

  • Blur the U chroma channel 
video = ColorBars(512, 512).ConvertToYV12
u_chroma = UToY(video).Blur(1.5)
YToUV(u_chroma, video.VToY)
MergeLuma(video)
  • Show U and V channels stacked for illustration purposes.
    • Note that with a YV12 source (like the one below), the U and V images will be half the size of the original.
    • In the U and V images, gray will be at 128d and saturated colors will appear brighter or darker.
 
SwapEx-Sintel9150.jpg 
StackVertical(
\  Subtitle("YV12 original", align=2),
\  StackHorizontal(
\       UtoY.Subtitle("UtoY", align=2), 
\       VtoY.Subtitle("VtoY", align=2)
\  )
\ )


[edit] Changes

v2.60 Added UToY8, VToY8.
v2.60 Added new color formats Y8, YV411, YV16 and YV24.
Retrieved from "http://avisynth.nl/index.php?title=Swap&oldid=12720"
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