cw2

$ lsdvd "Mr Bean Vol 1.iso" -Or
libdvdread: Using libdvdcss version 1.2.5 for DVD access
{
  :device =>
    'Mr Bean Vol 1.iso',
  :title =>
    'MRBEAN_A',
  :vmg_id =>
    'DVDVIDEO-VMG',
  :provider_id =>
    '',
  :tracks =>
    [
      {
        :ix =>
          1,
        :length =>
          1551.000,
        :vts_id =>
          'DVDVIDEO-VTS',
      },
      {
        :ix =>
          2,
        :length =>
          1506.166,
        :vts_id =>
          'DVDVIDEO-VTS',
      },
      {
        :ix =>
          3,
        :length =>
          1484.000,
        :vts_id =>
          'DVDVIDEO-VTS',
      },
      {
        :ix =>
          4,
        :length =>
          1444.000,
        :vts_id =>
          'DVDVIDEO-VTS',
      },
      {
        :ix =>
          5,
        :length =>
          1468.010,
        :vts_id =>
          'DVDVIDEO-VTS',
      },
    ],
  :longest_track =>
    1,
}