mirror of https://github.com/mpv-player/mpv
151 lines
4.0 KiB
Bash
Executable File
151 lines
4.0 KiB
Bash
Executable File
#!/bin/sh
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# Helper script to ease comparing the PSNR between two video files
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# Copyleft 2005 by Matthias Wieser
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# This file comes under GPL, see http://www.gnu.org/copyleft/gpl.html for more
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# information on its licensing.
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TEMPDIR="/tmp/psnr_video"
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WORKDIR=`pwd`/
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if [ $# -le 1 ]; then
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echo
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echo "Usage: `basename $0` <file1> <file2> [<frames>] [<options1>] [<options2>]"
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echo
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echo " <file1> and <file2> are the files for which the PSNR should be calculated."
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echo " [<frames>] is the number of frames to process, starting from frame 1."
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echo " [<options1>] are additional MPlayer options for <file1>."
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echo " [<options2>] are additional MPlayer options for <file2>."
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echo
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echo " Be aware that `basename $0` needs a lot of temporary space inside /tmp/."
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echo
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echo "Example:"
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echo " ./`basename $0` ./orig.avi ./test.avi 250 \"\" \"-vf pp=ac\""
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echo
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exit 1
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fi
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FILE1=$1
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FILE2=$2
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LastFrame=-1
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if [ $# -ge 3 ]; then
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LastFrame=$3
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echo
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echo "Will process $LastFrame frames."
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fi
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if [ $# -ge 4 ]; then
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FILE1_Options=$4
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echo "MPlayer options for ${FILE1}: $FILE1_Options"
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fi
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if [ $# -ge 5 ]; then
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FILE2_Options=$5
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echo "Mplayer options for ${FILE2}: $FILE2_Options"
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fi
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mkdir -p ${TEMPDIR}/FILE1
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mkdir -p ${TEMPDIR}/FILE2
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### File 1
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echo
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echo "############## $FILE1 #################"
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cd ${TEMPDIR}/FILE1
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rm -f *ppm
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rm -f *del
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if [ $LastFrame -ge 0 ]; then
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mplayer $FILE1_Options -frames $LastFrame -nosound -vo pnm ${WORKDIR}$FILE1 >/dev/null
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else
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mplayer $FILE1_Options -nosound -vo pnm ${WORKDIR}$FILE1 > /dev/null
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fi
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### File 2
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echo
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echo "############## $FILE2 #################"
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cd ${TEMPDIR}/FILE2
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rm *ppm 2> /dev/null
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if [ $LastFrame -ge 0 ]; then
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mplayer $FILE2_Options -frames $LastFrame -nosound -vo pnm ${WORKDIR}$FILE2 >/dev/null
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else
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mplayer $FILE2_Options -nosound -vo pnm ${WORKDIR}$FILE2 >/dev/null
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fi
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### PSNR
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echo
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echo "############## PSNR Calculation #################"
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if [[ `ls -1 ${TEMPDIR}/FILE1/*ppm | wc -l` = `ls -1 ${TEMPDIR}/FILE2/*ppm | wc -l` ]]
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then
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echo
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else
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echo "Files have differing numbers of frames!"
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echo "$FILE1 has `ls -1 ${TEMPDIR}/FILE1/*ppm | wc -l` frames,"
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echo "$FILE2 has `ls -1 ${TEMPDIR}/FILE2/*ppm | wc -l` frames."
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echo "Processing the first `ls -1 ${TEMPDIR}/FILE2/*ppm | wc -l` frames."
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echo
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fi
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cd ${TEMPDIR}/FILE2
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#rm ../psnr.dat
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echo "File;Y;Cb;Cr" >../psnr.dat
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echo "0" > errorsum.del
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i=0
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for FILE in `ls -1 *.ppm`
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do
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echo $FILE
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echo -n "$FILE">>../psnr.dat
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echo -n ";">>../psnr.dat
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pnmpsnr ../FILE1/$FILE $FILE 2> del.del
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grep "Y" del.del | dd bs=1c count=5 skip=29 of=del2.del 2>/dev/null
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Y=`cat del2.del`
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echo -n "$Y;">>../psnr.dat
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grep "Cb" del.del | dd bs=1c count=5 skip=29 of=del2.del 2>/dev/null
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CB=`cat del2.del`
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echo -n "$CB;">>../psnr.dat
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grep "Cr" del.del | dd bs=1c count=5 skip=29 of=del2.del 2>/dev/null
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CR=`cat del2.del`
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echo -n "$CR;">>../psnr.dat
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ALL=`echo "(-10)*l((e(-$Y/10*l(10))+e(-$CB/10*l(10))/4+e(-$CR/10*l(10))/4)/1.5)/l(10)"|bc -l`
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echo "$ALL">>../psnr.dat
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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`
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ERRORSUM=`cat errorsum.del`
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echo `echo "scale=30; $ERROR + $ERRORSUM" | bc -l` > errorsum.del
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i=$(($i+1))
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if [[ $i = $LastFrame ]]
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then
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break
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fi
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done
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ERRORSUM=`cat errorsum.del`
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PSNR=`echo "-10*l($ERRORSUM/$i)/l(10)" | bc -l`
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echo "PSNR:;$PSNR">>../psnr.dat
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cd ..
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mv psnr.dat ${WORKDIR}
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if [[ `ls -1 ${TEMPDIR}/FILE1/*ppm | wc -l` = `ls -1 ${TEMPDIR}/FILE2/*ppm | wc -l` ]]
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then
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echo
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else
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echo "Files have differing numbers of frames!"
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echo "$FILE1 has `ls -1 ${TEMPDIR}/FILE1/*ppm | wc -l` frames,"
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echo "$FILE2 has `ls -1 ${TEMPDIR}/FILE2/*ppm | wc -l` frames."
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echo "Processed the first `ls -1 ${TEMPDIR}/FILE2/*ppm | wc -l` frames."
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echo
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fi
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cd ..
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rm -r ${TEMPDIR}
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echo "Created ${WORKDIR}psnr.dat"
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echo
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