mkisofs -dvd-video: caveat lector
It turns out that mkisofs fails to handle DVD-Video volume if there
is/are title set(s) not referenced from one of the structures in
VIDEO_TS.IFO, VMG_PTT_SRPT to be specific. One can argue if it's mkisofs
bug or corrupt layout, but we'll hardly get anywhere as nobody saw the
DVD-Video specifications. The disk is reportedly playable in several
set-tops and by software players, yet mkisofs aborts complaining about
negative padding for a .BUP file. However! The problem seems to be
rather rare and the question is it's rare enough to simply dismiss it.
So far we failed to find second such media among ~35 different titles.
This is too low to devote an effort into fixing it. Unless somebody can
confirm that this is a regular problem, my suggestion is to just dismiss
it. If you wish to check a title you can invoke 'mkisofs -v -o /dev/null
-print-size -dvd-video ...' Note that you don't have to "rip" the volume
and can run the command directly again media mount pount(*). When
invoked with -v option mkisofs prints pad values and what you will be
looking for are unreasonably high padding values. A.
(*) On Linux you have to make sure video files are in capitals. You can
achieve this by explicitly mounting DVDs as UDF and not ISO9660.
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