#!/bin/bash

# Script to convert mjpeg files into a sequence of jpg images
# Usage: mjpeg2jpg video [basename_images]
#
# Requirements: avconv
# (c) 2013 Ingo von Borstel

if [ -z "$1" ]; then
	echo "Usage: `basename $0` [videofile_pattern] output_basename"
	exit 1
fi

eval basename=\${$#}
videofile=${basename}.mjpeg

if [ $# -eq 1 ]; then
	for i in `ls -v1 *.mjpeg`; do
		cat $i >> ${videofile}
	done
else
	while (($# > 1)); do
		cat $1 >> ${videofile}
		echo "Processing $1"
		shift
	done
fi

avconv -i ${videofile} -c:v copy $1_image%4d.jpg