#!/bin/bash

INFILE="$1"
[[ -z $1 ]] && echo -e  "\n***\nUsage: impipetest VIDEO\n***\n" && exit 1
[[ -e im.fifo ]] && rm -f im.fifo
mkfifo im.fifo
convert im.fifo -resize 320x240  -mattecolor blue  -frame 8x8 -raise 4x4 fifo.png &
exec 3>im.fifo
ffmpeg -ss 2 -i "$INFILE" -f image2pipe -vframes 1 - >&3 2>/dev/null

# close the pipe
exec 3>&-
wait
display -title "Conversion from fifo" fifo.png