if dualpass==1:
pas1exe="mencoder \'"+pin+"\' -ovc xvid "+encvf+" -xvidencopts "+bitrate+":threads=2:pass=1:turbo -passlogfile \'"+pin+".log\' "+"-oac mp3lame -lameopts cbr:br=128 -o /dev/null"
pas2exe="mencoder \'"+pin+"\' -ovc xvid "+encvf+" -xvidencopts "+bitrate+":threads=2:pass=2 -passlogfile \'"+pin+".log\' "+"-oac mp3lame -lameopts cbr:br=128 -o \'"+pout+"\'"
if dualpass==1:
pas1exe="mencoder \'"+pin+"\' -ovc xvid "+encvf+" -xvidencopts "+bitrate+":threads=2:pass=1:turbo -passlogfile \'"+pin+".log\' "+"-oac mp3lame -lameopts cbr:br=128 -o /dev/null"
pas2exe="mencoder \'"+pin+"\' -ovc xvid "+encvf+" -xvidencopts "+bitrate+":threads=2:pass=2 -passlogfile \'"+pin+".log\' "+"-oac mp3lame -lameopts cbr:br=128 -o \'"+pout+"\'"