inaccurate table of contents

I am finding lots of DVDs that play just fine with Totem or Xine but are 
impossible to backup accurately. Typically there are about 100 tracks 
but the tracks do not correspond to the content very well. For example, 
many tracks report, say 25 minutes of video, but if you play them then 
the length changes to less than 100 frames. There are other tracks that 
seem to contain the content. If I copy them to the hard drive then I get 
maybe an hour of video. However, the track is not the entire program but 
just a slice of it. So it looks like content creators are distributing 
the video across tracks in a fairly complex way and using the DVD Menu 
system to piece things back together. Is there a way to backup these 
kinds of DVDs?

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