.TH BLIND-PREMULTIPLY 1 blind
.SH NAME
blind-premultiply - Premultiply the alpha channel of a video
.SH SYNOPSIS
.B blind-premultiply
[-xyz]
.SH DESCRIPTION
.B blind-premultiply
reads a video from stdin and multiplies the
colour values with the alpha value for each pixel,
and prints the resulting video to stdout.
.SH OPTIONS
.TP
.B -x
Do not modify the X channel (the first channel).
.TP
.B -y
Do not modify the Y channel (the second channel).
.TP
.B -z
Do not modify the Z channel (the third channel).
.SH SEE ALSO
.BR blind (7),
.BR blind-unpremultiply (1)
.SH AUTHORS
Mattias Andrée
.RI < maandree@kth.se >