ShowAlpha
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::For [[YUV]] output the selected channel is copied to the ''Y'' (luma) channel, and the ''U'' and ''V'' (chroma) channels are set to grey (128). | ::For [[YUV]] output the selected channel is copied to the ''Y'' (luma) channel, and the ''U'' and ''V'' (chroma) channels are set to grey (128). | ||
::[[YUV]] clips are full range (0-255), and so can be used as the ''mask'' argument to [[Overlay]]. | ::[[YUV]] clips are full range (0-255), and so can be used as the ''mask'' argument to [[Overlay]]. | ||
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==== See Also ==== | ==== See Also ==== | ||
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| − | == Examples == | + | ==== Examples ==== |
* Shows alpha channel of clip | * Shows alpha channel of clip | ||
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| − | == Changelog == | + | ==== Changelog ==== |
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Revision as of 13:29, 23 April 2017
ShowAlpha(clip clip [, string pixel_type ] )
Returns the alpha channel of an RGB32 clip as greyscale.
- string pixel_type = "RGB32"
ShowRed(clip clip [, string pixel_type ] )
ShowGreen(clip clip [, string pixel_type ] )
ShowBlue(clip clip [, string pixel_type ] )
Returns the selected channel of an RGB32 or RGB24 clip as greyscale.
- string pixel_type = "RGB32"
- Sets the color format of the output.
- Allowed pixel_types are RGB, RGB32, RGB24, YUY2, YV12 and (in v2.60) Y8.
- Default is "RGB"; note "RGB" and "RGB32" are equivalent arguments here.
- For RGB32 output the selected channel is copied to all three color channels, but not to the Alpha channel, which is left untouched.
- For YUV output the selected channel is copied to the Y (luma) channel, and the U and V (chroma) channels are set to grey (128).
- YUV clips are full range (0-255), and so can be used as the mask argument to Overlay.
See Also
Examples
- Shows alpha channel of clip
AviSource("clip.avi") ShowAlpha
- Swaps red and blue channels
AviSource("clip.avi")
MergeRGB( ShowBlue("YV12"), Last, ShowRed("YV12") )
Changelog
| v2.60 | Added pixel_type "Y8" |
| v2.56 | Added ShowBlue, ShowGreen and ShowRed. |
