#!/bin/bash

get_listargs()
{
    unset x ARGS_ARRAY
    # Hackish list-parsing
    while test $# -gt 0 && test x"${1:0:1}" != x"-"; do
        ARGS_ARRAY[x++]="$1"
        shift
    done
    # Do not skip past the next argument
    if test $# -gt 0 && test x"${1:0:1}" = x"-";then
        DO_SHIFT=false
    fi
}


yuvstrip ()
{
       read junk
       cat
       return 0
}

while test $# -gt 0; do
    DO_SHIFT=:
    case "$1" in
        "-files")
            shift
            get_listargs "$@"
            for f in  ${!ARGS_ARRAY[@]}; do
                INFILES[f]=$(readlink -f "${ARGS_ARRAY[f]}")
            done
             ;;
        "-audio" )
            shift
            AUDIO=$(readlink -f "$1")
            ;;
        "-out" )
            shift
            OUTFILE=$(readlink -f "$1")
            ;;
    esac
    $DO_SHIFT && shift
done

mkfifo enc.fifo

IMGENC_CMD=(ffmpeg -f yuv4mpegpipe -i - -i "$AUDIO" -shortest -acodec ac3 -ab 224k -ar 48000 -target ntsc-dvd -y "$OUTFILE")
"${IMGENC_CMD[@]}" 2>/dev/null < enc.fifo &
exec 3> enc.fifo

for i in ${!INFILES[@]}; do
    ((i==0)) && strip="cat" || strip="yuvstrip"
    ffmpeg -i "${INFILES[i]}" -an -f yuv4mpegpipe - | $strip
done >&3