#!/bin/bash

INFILES=( "$@" )

yuvstrip ()
{
       read junk
       cat
       return 0
}


mkfifo enc.fifo

IMGENC_CMD=(ffmpeg -f yuv4mpegpipe -i - -i FILE.wav -shortest -acodec ac3 -ab 224k -ar 48000 -target ntsc-dvd -y out.mpg)
"${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