ps aux | grep vlc

pc       27636  2.1  2.3 1261964 90028 ?       Sl   21:46   0:23 /usr/bin/vlc --started-from-file /media/pc/Everything/TV shows/Discovery Channel - The History Of Hacking.avi
pc       28317  0.0  0.0  11748  2196 pts/0    S+   22:05   0:00 grep --colour=auto vlc

-c c    selects  the  listing  of  files  for  processes  executing the
        command that begins with the characters of c.  Multiple commands
        may be specified, using multiple -c options.  They are joined in
        a single ORed set before participating in AND option selection.

$ lsof -wc vlc | awk '$4~"[0-9]r" && $5=="REG"'
vlc     16532 terdon   16r      REG    8,19    131338  69731703 /path/to/foo.avi

$ lsof -wc vlc | awk '$4~"[0-9]r" && $5=="REG"' | grep -o '/.*'
/path/to/foo.avi

$ lsof -wc vlc | awk '$4~"[0-9]r" && $5=="REG"' | grep -o '[^/]*$'
foo.avi

pgrep -a vlc

pgrep -a vlc | sed -r 's%^.*/([^/.]+)%1%g'

qdbus org.mpris.MediaPlayer2.vlc

/org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.Metadata

| grep "xesam:title:" | cut -c 14-