blind-set-luma.1 - blind - suckless command-line video editing utility
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       blind-set-luma.1 (1125B)
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            1 .TH BLIND-SET-LUMA 1 blind
            2 .SH NAME
            3 blind-set-luma - Multiply the luminosity of a video
            4 .SH SYNOPSIS
            5 .B blind-set-luma
            6 .I luma-stream
            7 .SH DESCRIPTION
            8 .B blind-set-luma
            9 reads a video from stdin and a mask video from
           10 .IR luma-stream .
           11 The video is printed to stdout, with the luminosity
           12 of each pixel multiplied by the product of the
           13 luminosity and the alpha value of the corresponding
           14 pixel and frame in the mask video.
           15 .P
           16 If stdin is longer than
           17 .IR luma-stream ,
           18 the remainder of stdin is printed without any changes.
           19 If stdin is shorter than
           20 .IR luma-stream ,
           21 the remainder of
           22 .I luma-stream
           23 is ignored but may be partially read.
           24 .SH NOTES
           25 In most cases, this is not what you want to use, instead
           26 you probably want to use
           27 .BR blind-arithm (1)
           28 to multiple the X, Y and Z values on one value. This
           29 produces the same affect as reducing the intensity of
           30 the light sources, which is not what
           31 .B blind-set-luma
           32 does.
           33 .SH SEE ALSO
           34 .BR blind (7),
           35 .BR blind-single-colour (1),
           36 .BR blind-arithm (1),
           37 .BR blind-set-alpha (1),
           38 .BR blind-invert-luma (1),
           39 .BR blind-set-saturation (1)
           40 .SH AUTHORS
           41 Mattias Andrée
           42 .RI < maandree@kth.se >