#!/bin/bash

SRC=$1
NAME="${SRC%.*}"
MPG="${NAME}.mpg"
DVD="${NAME}.dvd"
ISO="${NAME}.iso"

export VIDEO_FORMAT=NTSC

if [[ -z $SRC ]] || [[ ! -r $SRC ]]; then
    echo "-E- You need to specify a valid src video file as an argument"
    exit 1
fi

if [[ ! -e "$MPG" ]]; then
    echo "-> Converting \"$SRC\" -> \"$MPG\""
    # Convert the SRC video into a DVD compatible mpg2 file
    ffmpeg -i "$SRC" -target ntsc-dvd -aspect 16:9 "$MPG"
    if [[ $? != 0 ]]; then
	echo "-> ffmpeg encountered an error. aborting..."
	rm "$MPG"
	exit 1;
    fi
fi

echo "-> Creating DVD ISO: $ISO"
# Create an intermediate DVD dir
mkdir -p "$DVD"
# Define the title file
dvdauthor -o "$DVD" -t "$MPG"
# Create a table of contents
dvdauthor -o "$DVD" -T
# Convert the DVD dir into an ISO image
genisoimage -dvd-video -o "$ISO" "$DVD"
# Remove the intermediate DVD dir
rm -rf "$DVD"
# Remove the intermediate MPG file
rm "$MPG"