Swap: Difference between revisions
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== Syntax and Parameters == | == Syntax and Parameters == | ||
<div style="max-width:62em" > | |||
{{FuncDefH4|SwapUV}} | {{FuncDefH4|SwapUV}} | ||
{{FuncDef | {{FuncDef | ||
| Line 41: | Line 42: | ||
:If {{FuncArg|clipY}} is given, copies the ''Y'' (luma channel) of {{FuncArg|clipY}} to the ''Y'' channel of the output clip. | :If {{FuncArg|clipY}} is given, copies the ''Y'' (luma channel) of {{FuncArg|clipY}} to the ''Y'' channel of the output clip. | ||
:Depending on the color format, the image resolution can be changed. | :Depending on the color format, the image resolution can be changed. | ||
</div> | |||
== Examples == | == Examples == | ||
<div style="max-width:62em" > | |||
* Blur the U chroma channel | * Blur the U chroma channel | ||
<div {{BoxWidthIndent|28| | <div {{BoxWidthIndent|28|2}} > | ||
video = [[ColorBars]](512, 512).[[ConvertToYV12]] | video = [[ColorBars]](512, 512).[[ConvertToYV12]] | ||
u_chroma = '''UToY'''(video).[[Blur]](1.5) | u_chroma = '''UToY'''(video).[[Blur]](1.5) | ||
'''YToUV'''(u_chroma, video.'''VToY''') | '''YToUV'''(u_chroma, video.'''VToY''') | ||
[[MergeLuma]](video) | [[MergeLuma]](video) | ||
</div> | |||
* Show ''Y'', ''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 compared to the ''Y'' image. | |||
** In the ''U'' and ''V'' images, gray will be at 128 and colors will be either brighter or darker. | |||
{{HalfBreak}} | |||
:[[File:SwapEx-Sintel9150.jpg]] | |||
<div {{BoxWidthIndent|48|2}} > | |||
[[StackVertical]]( | |||
\ [[Subtitle]]("YV12 original", align=2), | |||
\ [[ConvertToY8]].[[ConvertToYV12]].[[Subtitle]]("ConvertToY8", align=2), | |||
\ [[StackHorizontal]]( | |||
\ '''UtoY'''.Subtitle("UtoY", align=2), | |||
\ '''VtoY'''.Subtitle("VtoY", align=2) | |||
\ ) | |||
\ ) | |||
</div> | |||
</div> | </div> | ||
Revision as of 03:13, 25 March 2016
Swaps chroma channels in YUV clips.
Syntax and Parameters
SwapUV(clip clip)
- Swaps U and V (chroma) channels. Corrects certain decoding errors – faces blue instead of red, etc.
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(clip clip)
VToY8(clip clip)
- Shorthand for UToY.ConvertToY8 and VToY.ConvertToY8, but faster.
YToUV(clip clipU, clip clipV [, clip clipY ] )
- 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.
- Depending on the color format, the image resolution can be changed.
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 Y, 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 compared to the Y image.
- In the U and V images, gray will be at 128 and colors will be either brighter or darker.
StackVertical( \ Subtitle("YV12 original", align=2), \ ConvertToY8.ConvertToYV12.Subtitle("ConvertToY8", align=2), \ StackHorizontal( \ UtoY.Subtitle("UtoY", align=2), \ VtoY.Subtitle("VtoY", align=2) \ ) \ )
Changes
| v2.60 | Added UToY8, VToY8. |
| v2.60 | Added new color formats Y8, YV411, YV16 and YV24. |
