dpkg -l | grep libv4l 
ii  libv4l-0:amd64                                        1.0.1-1                                             amd64        Collection of video4linux support libraries
ii  libv4l-0:i386                                         1.0.1-1                                             i386         Collection of video4linux support libraries
ii  libv4lconvert0:amd64                                  1.0.1-1                                             amd64        Video4linux frame format conversion library
ii  libv4lconvert0:i386                                   1.0.1-1                                             i386         Video4linux frame format conversion library