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Diffstat (limited to 'man/blind-set-alpha.1')
| -rw-r--r-- | man/blind-set-alpha.1 | 33 |
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diff --git a/man/blind-set-alpha.1 b/man/blind-set-alpha.1 new file mode 100644 index 0000000..8e53c18 --- /dev/null +++ b/man/blind-set-alpha.1 @@ -0,0 +1,33 @@ +.TH BLIND-SET-ALPHA 1 blind +.SH NAME +blind-set-alpha - Multiply the alpha channel of a video +.SH SYNOPSIS +.B blind-set-alpha +[-i] +.I alpha-stream +.SH DESCRIPTION +.B blind-set-alpha +reads a video from stdin and a mask video from +.IR 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. +.P +If stdin is longer than +.IR alpha-stream , +the remainder or stdin is printed without any changes. +If stdin is shorter than +.IR alpha-stream , +the remainder of +.I alpha-stream +is ignored but may be partially read. +.SH OPTIONS +.TP +.B -i +Use the inverse luminosity of the mask video instead +of the luminosity. It is still multiplied by the +alpha value. +.SH AUTHORS +Mattias Andree +.RI < maandree@kth.se > |