#!/bin/bash
set -e

# Arg parser
while [ ! $# == 0 ]; do
	case "$1" in
        -o | --output) shift; OUTPUT=$1;;
        *)
        if [[ -f $1 ]]; then
            INPUT=$1
        else
            echo "Invalid argument \"$1\""
            exit 1
        fi
    ;;
    esac
    shift
done

# If no input is specified, exit
[[ ! -f $INPUT ]] && echo "No input file specified!" && exit 1

# If no output is specified, plop it into the same folder as the source and rename to *.avi
[[ ! $OUTPUT ]] && OUTPUT=$(echo "$INPUT" | sed 's/\(.*\)\..*/\1/').avi

#################

# Make tempdir
TMPDIR="/tmp/$(basename "$INPUT" | sed 's/\(.*\)\..*/\1/')-$RANDOM"
mkdir "$TMPDIR"

# Extract camrec file
7z e "$INPUT" -o"$TMPDIR"

# Ready up ffmpeg jank for merging audio (I hope to god there is only one video stream)
AUDIO=
NUM=0
for i in "$TMPDIR/*.wav"; do
    AUDIO+="-i $i -map $NUM "
    NUM=$(( $NUM + 1 )) # Fuck you Bash
done

# Convert contents to AVI
ffmpeg -i "$TMPDIR/Screen_Stream.avi" $AUDIO -map $NUM -c:v copy -c:a copy $OUTPUT

rm -r "$TMPDIR"