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															+#!/bin/bash 
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															+extract_mp4_to_png() 
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															+{ 
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															+	local bname="$(basename $1)" 
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															+	local dname="${bname%.*}" 
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															+	if [ -d "$dname" ]; then 
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															+		echo "directory ($dname) already exists..." 
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															+		return 
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															+	fi 
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															+	mkdir -p "$dname" 
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															+	ffmpeg -i "$bname" -r 1 -f image2 "${dname}/%03d.png" 
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															+} 
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															+ 
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															+extract_mp4_to_png "$1" 
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															+ 
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