[MPlayer-users] DVD NTSC artifacts

[Arnd Marijnissen]

Dear fellow MPlayer fanatics ;)

Recently i've been busy using mencoder to make some backup copies of
way-too-expensive Anime DVD's that i have lying around ;)

The problem i'm having though is that all these DVD's are (ofcourse) in
NTSC format. In itself that's not a real problem, but i'm having problems
with a nasty video-artifact that i cant seem to get filtered out.

The problem i'm having is that in moving scenes, fast-moving parts of the
screen will be updated in a kind of interlaced way.

What happens is that you get an effect like this :

          -------
            -------
          -------
            -------


where the alternating rows of pixels seem to be differently aligned.
With static images, there are no such problems, nor have I been able to
detect this problem with any of the PAL dvd's that i've backupped _except_
a few reallllllly expensive pr0n DVD's (hey... cheapest DVD's to test
mencoder with ;), that were originally NTSC format, re-dubbed onto PAL.

So, i'm "guessing" that this is an NTSC artifact due to interlacing ?

The "problem" though is that (dont hit me!), PowerDVD for example seems to
play the same DVD with absolutely no artifacts.
The DVD's in question are LAIN (4 DVD's with total of 13 episodes) and
Love Hina.

-autoq / -pp had no noticable effect on getting rid of this artifact.

I've checked out mplayer from CVS last night (25 March), using a 2.95
gcc, debian Sid, and Ati Rage Mobility with XV support (though the same
artifacts are visible with -vo x11 too. The DivX that comes out of
mencoder has the artifacts in it aswell.... which is the real problem ;)

I've scanned through "TFM"'s with a "grep" on "NTSC", but found nothing of
value there, though you are allowed to hit me if I missed it ;)

Anyone notice this thing before ?... Anyone who can tell me the exact
reason ? (so i can be enlightened), and anyone knows how to
process/filter/smoothe them away ?

-- 
 Justaneko