Most people don't seem to know the difference between interlaced video and
progressive video, or can't tell the difference.  I created this simple motion
test so that the differences were very easily illustrated.

Two files are provided:

- A DV file (avi)
- An MPEG-2 elementary video stream (m2v, provided if your player can't
  deinterlace the DV file properly)

If your player is playing or deinterlacing properly, you should see three lines
of moving text:  30i, 30p, and 24p.  All three lines move at the broadcast
standard they represent.  The 30i line should appear to have the smoothest
motion; the 30p next smoothest, and finally the 24p should have the same judder
as film sources do (because it is effectively a film source).

If the 30i and 30p lines look identical to you, then check your player to make
sure it is deinterlacing properly.  If you have tried many options and are SURE
that it is, well, you must not be able to see the difference (or don't care,
like my wife).

VLC has a proper deinterlace option in the "linear" and "yadif x2" settings --
all others mangle the temporal information in interlaced content.  VLC has a
problem playing .AVI files on my machine, so I also provided the .M2V file for
those with VLC.

-- trixter@oldskool.org 20120204
