[MPlayer-users] Question on converting to DivX4...

[Rainer Hantsch]

Thank you very much. This was very helpful.

Now another problem appeared:

DBox produces/saves an interlaced video with a squeezed image. Stretching is
fine, but which options shall I use to deinterlace?

I tried pp=0x20000  and  also  pp=0x7f   (as recommended in the man pages).
Both actually give a relatively good result (interlacing vanishes nearly
completely), but the resulting DivX gets noisy (picture shows sometimes
artifacts). 0x7f seems to give poorer result than 0x20000, especially in
HighMotion scenes.

Here the script with options I currently use:

---<snip>----------------------------------------------------
#!/bin/sh

function usage () {
  echo
  echo "Usage: $0 <options> "
  echo "          -d /dev/sr1 ........ CD-ROM device (default=/dev/sr1)"
  echo "          -i input ........... Track (default=vcd://1)"
  echo "          -t sekunden ........ Nur Test-Datei erzeugen"
  echo "          -o filename ........ Zieldatei für fertigen Film"
  echo "          -s 4:3 | 16:9 ...... Skalierung wählen (4:3=default)"
  echo "          -b bitrate ......... Video-Bitrate (1950=default)"
  exit 0
}

function cleanup () {
 rm -f frameno.avi > /dev/null
 rm -f *.log > /dev/null
}

if [ "$1" == "" ] ; then
  usage
  exit 1
fi

# Initialisierung ...
endpos=""
erg=""
scale="720:540"     # 4:3 Bildformat (=default)
VideoBitrate=1950   # Guter Standardwert
device="/dev/sr1"
ori="vcd://1"

while getopts d:i:o:t:s:b: option
do
  case $option in
  d)  device="-cdrom-device $OPTARG";
      ;;
  i)  ori="$OPTARG";
      ;;
  t)  endpos="-endpos $OPTARG";
      ;;
  o)  erg="$OPTARG";
      echo "###Zieldatei###: $erg";
      ;;
  s)  [ "$OPTARG" == "4:3" ] && scale="720:540";
      [ "$OPTARG" == "16:9" ] && scale="720:405";
      ;;
  b)  VideoBitrate="$OPTARG";
      ;;
  *)  usage;;
  esac
done

cat - << EOF
CD-ROM  ............... $device
Input Track ........... $ori
Output Datei .......... $erg
Bildformat ............ $scale
Video-Bitrate ......... $VideoBitrate
Zeitlimit ............. $endpos Sek.

EOF

sleep 8

# Fehler abfangen
trap 'cleanup; echo "Mache Cleanup..."; exit 1' 0 3 9

[ "$erg" == "" ] && erg="fertiger-film.avi"
echo "Erzeuge DivX Datei »$erg« ..."


cleanup


# Audio-Umwandlung
echo
echo
echo "AUDIO-UMWANDLUNG: $ori -> frameno.avi"
mencoder $endpos $device $ori -ovc frameno -oac mp3lame \
  -lameopts br=128:cbr:aq=0:q=0 \
  -o frameno.avi

# Video-Pass1
  echo
  echo
  echo "VIDEO-UMWANDLUNG:  $ori -> $erg"
      mencoder $endpos $device $ori -oac copy -ovc lavc \
      -lavcopts vcodec=mpeg4:vbitrate=$VideoBitrate:keyint=25 \
      -o "$erg" -vop pp=0x20000,denoise3d=8:6:6,scale=$scale -sws 2

#pp=0x7f  oder 0x20000
#-eof-
---<snap>--------------------------------------




mfg

  Ing. Rainer Hantsch