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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 multi- plied by the product of the luminosity and the alpha value of the cor- responding 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 re- mainder of alpha-stream is ignored but may be partially read. OPTIONS -i Use the inverse luminosity of the mask video instead of the lu- minosity. 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 Andre <maandree@kth.se> blind 1.1 BLIND-SET-ALPHA(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | AUTHORS
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