mkisofs -dvd-video won't work

[Paul Stravers <varkentje@oink-oink-oink.net>]

Looked everywhere for an answer, but could not resolve the following
problem with DVD authoring on a Debian testing/unstable box.

I create a dvd structure with the simplest example from "dvdauthor
0.6.10". I then try to create an ISO image using "mkisofs
2.01-unofficial-iconv" (same problem with growisofs):

  % mkisofs -dvd-video -o /dev/null -v -v test_dvd/VIDEO_TS/
  mkisofs 2.01-unofficial-iconv (i686-pc-linux-gnu)
  Scanning test_dvd/VIDEO_TS/
  Unknown file type (unallocated) test_dvd/VIDEO_TS/.. - ignoring and
continuing.
   270   308
  271 273 test_dvd/VIDEO_TS/VIDEO_TS.BUP
  274 276 test_dvd/VIDEO_TS/VIDEO_TS.IFO
  277 282 test_dvd/VIDEO_TS/VTS_01_0.BUP
  283 288 test_dvd/VIDEO_TS/VTS_01_0.IFO
  289 1973 test_dvd/VIDEO_TS/VTS_01_1.VOB
  mkisofs: Unable to make a DVD-Video image.

I am trying to understand why mkisofs is unable to make a DVD-Video
image. There is nothing in the error message to give me a hint... There
is of course the "unknown file type" message and the semi-empty line
following it, but how does that help me?

Thanks for any help ,
Paul Stravers