#!/bin/bash
OUTPUT="$(basename "$1" .avi).mp4"
+MP4BOX="$(which mp4box)" || MP4BOX="$(which MP4Box)"
mencoder "$1" -ovc copy -oac copy -of rawaudio -o tmp.aac
rm -f "${OUTPUT}"
-MP4Box -add "$1#video" -add tmp.aac "${OUTPUT}"
+"$MP4BOX" -add "$1#video" -add tmp.aac "${OUTPUT}"
rm -f tmp.acc