He is referring to running the output command that you see in your log from a command line to see if it creates a file or not. From your post above, the command would be:

Code:
export LD_LIBRARY_PATH=/home/japa13/lib; /home/japa13/bin/mencoder '/home/japa13/cult.com/video/one_1.wmv' -o /home/japa13/cult.com/flvideo/12229827742061842187.flv -of lavf -oac mp3lame -lameopts abr:br=56 -ovc lavc -lavcopts vcodec=flv:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 -srate 22050 -ofps 24 -vf harddup