[MEncoder-users] Green boxes on non-computer DVD player

[Nico Sabbi]

Eli Billauer wrote:

> Hello,
>
> I'm using mencoder to author an MPEG2 DVD (together with dvdauthor). 
> Playing the DVD disc on a Hitachi DVD/Video player, I get groups of 
> scattered green boxes in sporadic flashes, in particular when the 
> scene shifts quickly (when the frame changes completely, and also when 
> small regions change). This artifact tends to happen more in the 
> bottom half of the viewed frame. On a normal movie, this happens every 
> 30 seconds or so. Mplayer plays the same MPEG stream perfectly.
>
> Other than this, a complete 90-minutes movies plays perfectly both 
> with mplayer and the Hitachi machine.
>
> The green box patterns are exactly repeatable between two discs burned 
> from the same ISO image (same patterns on the same frames).
>

/me too on a particular player I happened to test, although I found 
neither the cause nor the solution.
I would describe the problem as "green horizontal sequences of 
macroblocks", especially
in the right portion of the image.
It seems to me that either the dvd reader has a buggy decoder (not to be 
excluded)
or there's some strange uncompliance in lavc's encoder.