[MPlayer-cvslog] CVS: main/TOOLS psnr-video.sh, NONE, 1.1 README, 1.9, 1.10
Guillaume Poirier CVS
syncmail at mplayerhq.hu
Mon Sep 12 18:36:01 CEST 2005
CVS change done by Guillaume Poirier CVS
Update of /cvsroot/mplayer/main/TOOLS
In directory mail:/var2/tmp/cvs-serv24706
Modified Files:
README
Added Files:
psnr-video.sh
Log Message:
Adds the script psnr-video.sh to calculate the PSNR between two existing video files.
Script by Matthias Wieser < mwieser AH gmx POUM de >
Original thread:
Date: Aug 25, 2005 1:54 PM
Subject: [MEncoder-users] [Script] PSNR between two video files
--- NEW FILE ---
#!/bin/sh
# Helper script to ease comparing two video files
# Copyleft 2001 by Matthias Wieser
# This file comes under GPL, see http://www.gnu.org/copyleft/gpl.html for more
# information on it's licensing.
TEMPDIR="/tmp/psnr_video"
WORKDIR=`pwd`/
if [ $# -le 1 ]; then
echo
echo "Usage: `basename $0` <file1> <file2> [<frames>] [<options1>] [<options2>]"
echo
echo " <file1> and <file2> are the video files for which the PSNR should be calculated."
echo " [<frames>] is the number of frames to process, starting from frame 1."
echo " [<options1>] are additional MPlayer options for <file1>"
echo " [<options2>] are additional MPlayer options for <file2>"
echo
echo " Be aware that `basename $0` needs a lot of temporal space inside /temp/."
echo
echo "Example:"
echo " ./`basename $0` ./orig.avi ./test.avi 250 \"\" \"-vf pp=ac\""
echo
exit 1
fi
FILE1=$1
FILE2=$2
LastFrame=-1
if [ $# -ge 3 ]; then
LastFrame=$3
echo
echo "Will process $LastFrame frames"
fi
if [ $# -ge 4 ]; then
FILE1Opts=$4
echo "Mplayer options for ${FILE1}: $FILE1Opts"
fi
if [ $# -ge 5 ]; then
FILE2Opts=$5
echo "Mplayer options for ${FILE2}: $FILE2Opts"
fi
mkdir -p ${TEMPDIR}/FILE1
mkdir -p ${TEMPDIR}/FILE2
### File 1
echo
echo "############## $FILE1 #################"
cd ${TEMPDIR}/FILE1
rm *ppm 2> /dev/null
rm *del 2> /dev/null
if [ $LastFrame -ge 0 ]; then
mplayer $FILE1Opts -frames $LastFrame -nosound -vo pnm ${WORKDIR}$FILE1 >/dev/null
else
mplayer $FILE1Opts -nosound -vo pnm ${WORKDIR}$FILE1 >/dev/null
fi
### File 2
echo
echo "############## $FILE2 #################"
cd ${TEMPDIR}/FILE2
rm *ppm 2> /dev/null
if [ $LastFrame -ge 0 ]; then
mplayer $FILE2Opts -frames $LastFrame -nosound -vo pnm ${WORKDIR}$FILE2 >/dev/null
else
mplayer $FILE2Opts -nosound -vo pnm ${WORKDIR}$FILE2 >/dev/null
fi
### PSNR
echo
echo "############## Calculation PSNR #################"
if [[ `ls -1 ${TEMPDIR}/FILE1/*ppm|wc -l` = `ls -1 ${TEMPDIR}/FILE2/*ppm|wc -l` ]]
then
echo
else
echo "Files have differing numbers of frames!"
echo "$FILE1 has `ls -1 ${TEMPDIR}/FILE1/*ppm|wc -l` frames,"
echo "$FILE2 has `ls -1 ${TEMPDIR}/FILE2/*ppm|wc -l` frames."
echo "Processing the first `ls -1 ${TEMPDIR}/FILE2/*ppm|wc -l` frames."
echo
fi
cd ${TEMPDIR}/FILE2
#rm ../psnr.dat
echo "File;Y;Cb;Cr" >../psnr.dat
echo "0" > errorsum.del
i=0
for FILE in `ls -1 *.ppm`
do
echo $FILE
echo -n "$FILE">>../psnr.dat
echo -n ";">>../psnr.dat
pnmpsnr ../FILE1/$FILE $FILE 2> del.del
grep "Y" del.del | dd bs=1c count=5 skip=29 of=del2.del 2>/dev/null
Y=`cat del2.del`
echo -n "$Y;">>../psnr.dat
grep "Cb" del.del | dd bs=1c count=5 skip=29 of=del2.del 2>/dev/null
CB=`cat del2.del`
echo -n "$CB;">>../psnr.dat
grep "Cr" del.del | dd bs=1c count=5 skip=29 of=del2.del 2>/dev/null
CR=`cat del2.del`
echo -n "$CR;">>../psnr.dat
ALL=`echo "(-10)*l((e(-$Y/10*l(10))+e(-$CB/10*l(10))/4+e(-$CR/10*l(10))/4)/1.5)/l(10)"|bc -l`
echo "$ALL">>../psnr.dat
ERROR=`echo "scale=30; (e(-1*$Y/10*l(10))+e(-1*$CB/10*l(10))/4+e(-1*$CR/10*l(10))/4)/1.5"|bc -l`
ERRORSUM=`cat errorsum.del`
echo `echo "scale=30; $ERROR + $ERRORSUM"|bc -l` > errorsum.del
i=$(($i+1))
if [[ $i = $LastFrame ]]
then
break
fi
done
ERRORSUM=`cat errorsum.del`
PSNR=`echo "-10*l($ERRORSUM/$i)/l(10)"|bc -l`
echo "PSNR:;$PSNR">>../psnr.dat
cd ..
mv psnr.dat ${WORKDIR}
if [[ `ls -1 ${TEMPDIR}/FILE1/*ppm|wc -l` = `ls -1 ${TEMPDIR}/FILE2/*ppm|wc -l` ]]
then
echo
else
echo "Files have differing numbers of frames!"
echo "$FILE1 has `ls -1 ${TEMPDIR}/FILE1/*ppm|wc -l` frames,"
echo "$FILE2 has `ls -1 ${TEMPDIR}/FILE2/*ppm|wc -l` frames."
echo "Processed the first `ls -1 ${TEMPDIR}/FILE2/*ppm|wc -l` frames."
echo
fi
cd ..
rm -r ${TEMPDIR}
echo "Created ${WORKDIR}psnr.dat"
echo
Index: README
===================================================================
RCS file: /cvsroot/mplayer/main/TOOLS/README,v
retrieving revision 1.9
retrieving revision 1.10
diff -u -r1.9 -r1.10
--- README 24 Aug 2005 00:24:11 -0000 1.9
+++ README 12 Sep 2005 16:35:58 -0000 1.10
@@ -254,6 +254,51 @@
assumes that the frame numbers of both files fit.
+psnr-video.sh
+
+Author: Matthias Wieser
+
+Description: Calculates the PSNR between two existing video files.
+ The PSNR is calculated frame by frame.
+ Prints also the overall PSNR.
+ The script can be used to:
+ * compare different softwarescalers (should I use
+ -sws 1 or -sws 2) ?
+ * compare different resolutions (is it better to scale
+ down to 640x360 or to 560x320)
+ * compare different deinterlacers
+ * compare different video codecs
+ * compare video filters (is it better to use -vf hqdn3d
+ or lavcopts:nr=400)
+ * [...]
+
+Usage: psnr-video.sh <file1> <file2> [<frames>] [<options1>] [<options2>]
+
+ <file1> and <file2> are the video files for which the PSNR
+ should be calculated.
+ [<frames>] is the number of frames to process, starting
+ from frame 1.
+ [<options1>] are additional MPlayer options for <file1>
+ [<options2>] are additional MPlayer options for <file2>
+
+ A file called psnr.dat will be created with the following
+ content:
+
+ File;Y;Cb;Cr
+ 00000001.ppm;34.23;39.54;40.06;35.426
+ 00000002.ppm;33.03;38.71;39.26;34.271
+ 00000003.ppm;33.45;38.91;39.28;34.655
+ 00000004.ppm;32.72;38.69;38.85;33.972
+ [...]
+ 00000247.ppm;35.55;40.84;42.15;36.785
+ PSNR:;35.9887
+
+Note: This script relies on the the tool "pnmpsnr" for the
+ frame-by-frame PSNR calculation.
+ Be aware that psnr-video.sh needs a lot of temporal space
+ inside /temp/.
+
+
asfinfo
Author: Arpi
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