Easy way to make a video for your Z Options

[alan]

Hi guys !
Googling aound, i found a little script on this site

http://cmisip.home.insightbb.com/

Here it comes :

CODE

#!/bin/sh
#version 1.1
#Changes 1-1.1
#Added aspect ratio.  There will be black bars on top and bottom to keep the resolution at 320x240 to avoid software scaling on the Z.
#Fixed AV_DELAY


#This script should convert any mplayer playable video file (audio + video) to ogm format playable on the sharp zaurus 5600 using mplayer with Tremor codec support. You need mencoder and mplayer of course, plus oggenc and ogmmerge.  


#Variable assignment
ENCODE_RATE=22050
AV_DELAY=200
VIDEO_BITRATE=150
OUTPUT_FPS=15
BRIGHTNESS=15
AUDIO_QUALITY=2
X_RESOLUTION=320
Y_RESOLUTION=240




#Check the command line arguments
if [ -z "$1" ]; then
             echo "Usage is 'createogm  <inputfile> <outputfile>' "
             exit
             fi

if [ -z "$2" ]; then
             echo "Usage is 'createogm  <inputfile> <outputfile>' "
             exit
             fi

if [ -f "$2" ]; then
             echo "The file $2 exists. Aborting "
             exit
             fi

#find $1 2>/dev/null
#if [ $? = 1   ]; then
#              echo "Cannot find source file. Aborting"
#              exit
#fi

#Check the source audio rate

AUDIO_RATE=$(mplayer -vo null -ao null -frames 0 -identify $1 2>/dev/null | grep "ID_AUDIO_RATE" | sed "s/ID_AUDIO_RATE=//g")


if [ -z $AUDIO_RATE  ]; then
             echo "Cannot detect audio in source file. Aborting"
             exit
fi



#Delete log files from previous encodes

if [ -f divx2pass.log ]; then
rm divx2pass.log
fi
if [ -f audiotmp.wav ]; then
rm audiotmp.wav
fi
if [ -f videotmp.avi ]; then
rm videotmp.avi
fi
if [ -f audiotmp.ogg ]; then
rm audiotmp.ogg
fi




#Encode the video
#First Pass
   nice -19 mencoder -nosound -ovc lavc -lavcopts vcodec=mpeg4:trell:mbd=2:vqmin=2:vqmax=31:v4mv:vmax_b_frames=1:cmp=2:subcmp=2:precmp=2:predia=1:dia=1:vme=4:vqcomp=0.6:vlelim=9:vcelim=-4:idct=7:lumi_mask=0.05:dark_mask=0.01:vstrict=-1:cbp:vfdct=1:vbitrate=$VIDEO_BITRATE:keyint=150:vpass=1 -vop expand=$X_RESOLUTION:$Y_RESOLUTION,pp=hb/vb/dr,eq=$BRIGHTNESS,scale=$X_RESOLUTION:-2,hqdn3d=8:6:12:lavcdeint -ofps $OUTPUT_FPS -zoom -sws 2 -o /dev/null  $1

#Second Pass
   nice -19 mencoder -nosound -ovc lavc -lavcopts vcodec=mpeg4:trell:mbd=2:vqmin=2:vqmax=31:v4mv:vmax_b_frames=1:vb_strategy=0:cmp=2:subcmp=2:precmp=2:predia=1:dia=1:vme=4:vqcomp=0.6:vlelim=9:vcelim=-4:idct=7:lumi_mask=0.05:dark_mask=0.01:vstrict=-1:cbp:vfdct=1:vbitrate=$VIDEO_BITRATE:keyint=150:vpass=2 -vop expand=$X_RESOLUTION:$Y_RESOLUTION,pp=hb/vb/dr,eq=$BRIGHTNESS,scale=$X_RESOLUTION:-2,hqdn3d=8:6:12:lavcdeint -ofps $OUTPUT_FPS -zoom -sws 2 -o ./videotmp.avi $1

#Extract the audio
   nice -n 19 mplayer -vc dummy -vo null -ao pcm -aofile ./audiotmp.wav $1 2>/dev/null

#Convert to ogg

   if [ $AUDIO_RATE -eq $ENCODE_RATE ]; then
        nice -n 19 oggenc -r -C 2 -R $AUDIO_RATE -B 16 -q $AUDIO_QUALITY -o audiotmp.ogg  audiotmp.wav
   else
        nice -n 19 oggenc -r -C 2 -R $AUDIO_RATE -B 16 -q $AUDIO_QUALITY --resample $ENCODE_RATE -o audiotmp.ogg  audiotmp.wav
   fi
           

#Multiplex the audio and video streams
   nice -n 19 ogmmerge -o  $2 videotmp.avi --sync $AV_DELAY  audiotmp.ogg

#Delete the temporary files
rm audiotmp.ogg
rm audiotmp.wav
rm videotmp.avi
rm divx2pass.log

It works fast and very well. It produces light and beautiful movies : a 20min episode of futurama is 30mo and Metropolis (2 hours) is 190 mo. To use it, it's simple :

CODE

sh createogm <input.avi> <output.ogm>

One thing is to be noticed yet : you should edit the "Y_RESOLUTION=240" line in order to keep your aspect ratio.

This leads me to a request : could someone optimize this script so that it automtically keeps the video aspect ratio or automatically crop depending on the output ? I don't know a lot about this, but i'm trying to learn , any help would ba appreciated.

PS: feel free to mail the author of this script, he did a good job !