.TH BLIND-STACK 1 blind
.SH NAME
blind-stack - Overlay videos
.SH SYNOPSIS
.B blind-stack
[-b]
.IR bottom-stream
.RI "... " top-stream
.SH DESCRIPTION
.B blind-stack
prints the video from the file
.I bottom-stream
to stdout, but draws the videos from the
succeeding arguments on top of the video from
.IR bottom-stream ,
drawing them in order, starting with the
video specified direct after
.I bottom-stream
and ending with
.IR top-stream .
The specified files can be any type, except
directory, including pipes.
.P
The output video will be as long as the longest
input video.
.SH OPTIONS
.TP
.B -b
Instead of drawing the videos on top of each
other, for each pixel in each frame, print the
average colour for each input stream's
corresponding pixel and frame.
.SH SEE ALSO
.BR blind-dissolve (1),
.BR blind-set-alpha (1),
.BR blind-single-colour (1)
.SH AUTHORS
Mattias Andrée
.RI < maandree@kth.se >