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BLIND-STACK(1) FreeBSD General Commands Manual BLIND-STACK(1)

blind-stack - Overlay videos

blind-stack [-b] bottom-stream ... top-stream

blind-stack prints the video from the file bottom-stream to stdout, but draws the videos from the succeeding arguments on top of the video from bottom-stream, drawing them in order, starting with the video specified direct after bottom-stream and ending with top-stream. The specified files can be any type, except directory, including pipes.
The output video will be as long as the longest input video.

-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.

blind(7), blind-dissolve(1), blind-set-alpha(1), blind-single-colour(1)

Mattias Andrée <maandree@kth.se>
blind 1.1

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