[vdr] shell script for data rate calculation

[Uwe Freese <mail@uwe-freese.de>]

Hello,

I  wrote  a  little  script  that calculates the average datarate of the
recordings.  It  uses  the fact that the index.vdr is 8 bytes per  frame
recording (hope that's correct).

Maybe  someone with really much recordings could run the script and then
Klaus  could change the assumed datarate to that value. I think, the "30
MB per Minute" is a little bit high.

My recordings have a datarate of 27 MB / min = 28.560.000 byte / min.

Klaus: Maybe you could add the script to your ftp directory.

--------------------------sample output---------------------------------
Ixos:/usr/local/bin # ./datarate-calc.sh
Datarate calculator for VDR - 02/2002 by Uwe Freese, mail@uwe-freese.de
Counting VDR file sizes...
Counting index file sizes...
Overall VDR files size:     34286 * 1000000 bytes
Overall index files size:   14619664 bytes
Overall video playing time: 20 h
Average data rate:          1714 * 1000000 bytes / h
Average data rate:          3809 kbps

------------------------datarate-calc.sh--------------------------------
#!/bin/sh

# calculate data rate for all recordings

echo Datarate calculator for VDR - 02/2002 by Uwe Freese, mail@uwe-freese.de

SOURCE=/video

echo Counting VDR file sizes...

FILES=`find /video -name ???.vdr`
VDRSIZE=0

for FILE in $FILES
do
  SIZE=`filesize "$FILE"`
  SIZE=`expr $SIZE / 10000`
  VDRSIZE=`expr $SIZE + $VDRSIZE`
done

echo Counting index file sizes...

FILES=`find /video -name index.vdr`
INDEXSIZE=0

for FILE in $FILES
do
  SIZE=`filesize "$FILE"`
  INDEXSIZE=`expr $SIZE + $INDEXSIZE`
done

PLAYINGTIME=`expr $INDEXSIZE / 720000`
DATARATE=`expr $VDRSIZE / $PLAYINGTIME / 100`
KBPS=`expr $VDRSIZE / $PLAYINGTIME / 45`
VDRSIZE=`expr $VDRSIZE / 100`

echo "Overall VDR files size:     $VDRSIZE * 1000000 bytes"
echo "Overall index files size:   $INDEXSIZE bytes"
echo "Overall video playing time: $PLAYINGTIME h"
echo "Average data rate:          $DATARATE * 1000000 bytes / h"
echo "Average data rate:          $KBPS kbps"
------------------------------EOF---------------------------------------

Bye, Uwe.