function iphone_encode() {
  if [ -z "$1" ];
    then echo "Usage: iphone_encode infile"
    return 1
  fi

  FIN="${1}"
  FOUT="${1%.*}-iphone.mp4"

  mencoder -vf scale=480:-10,harddup -lavfopts format=mp4 -faacopts mpeg=4:object=2:raw:br=128 -oac faac -ovc x264 -sws 9 -x264encopts nocabac:level_idc=30:bframes=0:global_header:threads=auto:subq=5:frameref=6:partitions=all:trellis=1:chroma_me:me=umh:bitrate=500:pass=1 -of lavf "$FIN" -o /dev/null
  mencoder -vf scale=480:-10,harddup -lavfopts format=mp4 -faacopts mpeg=4:object=2:raw:br=128 -oac faac -ovc x264 -sws 9 -x264encopts nocabac:level_idc=30:bframes=0:global_header:threads=auto:subq=5:frameref=6:partitions=all:trellis=1:chroma_me:me=umh:bitrate=500:pass=2 -of lavf "$FIN" -o "$FOUT"

  rm divx2pass.log*

  return 0
}