[MPlayer-users] mencoder and -noaspect

[Jean-Marc Stévenne]

Hi,

Using mencoder 0.90pre8, 0.90pre10 or 0.90rc1 I ran in a strange problem when 
trying to mencode the 7 Year in Tibet DVD zone 2. I use 3 phases encoding.
The sound was correctly encoded but during the process for every frame I had a
Skip frame!!!
warning.

On phase 2 (and 3), the Skip frame!!! warnings were of course there again but 
this time it affected the resulting video. It looked like one line out of two 
were encoded, also the first frame "ghost" seems to remain forever in the 
following frames. 

I eventually found a workaround: use -noaspect. 
I noticed that the number of frames processed correspond to 50fps instead of 
25 fps (I hope this might give you a clue of the cause), but the result was 
very good this time.

Question: is there any reason not to use -noaspect when mencoding a dvd?