ShowAlpha (clip, string pixel_type)
ShowBlue (clip, string pixel_type)
ShowGreen (clip, string pixel_type)
ShowRed (clip, string pixel_type)
ShowAlpha
shows the alpha channel of a RGB32 clip, available in v2.53. ShowBlue
/ ShowGreen / ShowRed shows the selected channel of a RGB clip, available in v2.56.
In v2.54 ShowAlpha now returns RGB, YUY2, or YV12 via the
pixel_type argument. The latter two can be used to layer an RGB clip with alpha
transparency data onto a YUV clip using the 3-argument form of Overlay, because
when setting pixel_type to YUY2 or YV12 the luma range is [0,255].
In v2.56 ShowAlpha/Red/Green/Blue now returns RGB24, RGB32,
YUY2, or YV12 via the pixel_type argument. For RGB32 output the selected
channel is copied to all R, G and B channels, but not the Alpha channel which
is left untouched. For YUV output the selected channel is copied to the Luma
channel, the chroma channels are set to grey (0x80).
Examples:
# shows alpha channels of clip
AviSource("clip.avi")
ShowAlpha()
# swaps red and blue channels:
AviSource("clip.avi")
MergeRGB(ShowBlue("YV12"), Last, ShowRed("YV12"))
Changelog:
| v2.56 | added ShowBlue, ShowGreen and ShowRed |
$Date: 2005/10/03 16:49:04 $