This diff for Xine 0.4.3 adds to features:

* overriding of display aspect ratio with the --display-ratio command line
  switch. Normally, the display ratio is calculated from the horizontal 
  and vertical resultion provided by the XServer, which in turn may be read 
  from the monitor via DDC.

  The ordinary aspect ratio of both the TV and the monitor screen is 
  4:3 = 1.333333. That means, the aspect ratio of the overscan mode can
  be used directly here.

  If your TV has a 16:9 mode, you can use this option to show an
  anamorphic (distorted) image on your monitor, which will be shown
  correctly on the TV.

* if the xine video window is resized, the video image is now centered 
  inside this window. So for 16:9 DVDs, which use a window of width 1024,
  resize the window to width 800 and a height > 600.





