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BLIND-SET-ALPHA(1) General Commands Manual BLIND-SET-ALPHA(1) NAME blind-set-alpha - Multiply the alpha channel of a video SYNOPSIS blind-set-alpha [-i] alpha-stream DESCRIPTION blind-set-alpha reads a video from stdin and a mask video from alpha- stream. The video is printed to stdout, with each alpha value multiplied by the product of the luminosity and the alpha value of the corresponding pixel and frame in the mask video. If stdin is longer than alpha-stream, the remainder of stdin is printed without any changes. If stdin is shorter than alpha-stream, the remainder of alpha-stream is ignored but may be partially read. OPTIONS -i Use the inverse luminosity of the mask video instead of the luminos- ity. It is still multiplied by the alpha value. SEE ALSO blind(7), blind-single-colour(1), blind-dissolve(1), blind-arithm(1), blind-set-luma(1), blind-invert-luma(1), blind-set-saturation(1) AUTHORS Mattias AndrA(C)e <maandree@kth.se> blind 1.1 BLIND-SET-ALPHA(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | AUTHORS
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