Following command tells me the length of mp4 video files:find -type f -name *.mp4 -print0 | \   xargs -0  mplayer -vo dummy -ao dummy -identify 2>/dev/null | \   perl -nle '/ID_LENGTH=([0-9\.]+)/ && ($t +=$1) && printf %02d:%02d:%02d\n,$t/3600,$t/60%60,$t%60' | \   tail -n 1Can someone parse it to a Linux beginner and explain why it is the way it is? It would also be helpful to know how to use it again and again without retyping it or through copy-and-paste.
Help me parse this `find` command
command line;shell script;find