DVD: mencoder compression.

[Patrick]

On Thu, 2005-11-03 at 16:37 +0600, Strong wrote:
> Я rip titles from DVD (as I have learned with the very good parameters)
> this way:
> 
> $ mencoder dvd://3 -sws 2 -oac copy -ovc lavc -lavcopts
> vcodec=mpeg4:mbd=2:vbitrate=1800:vpass=1 -vf crop=854:355:0:62,scale=854
> -o movie.avi
> 
> But get at least 3 problems:
> . mplayer shows picture with the width=854, while mencoder (if I use not
> scale=854), compresses it with width=720. - Why?

Not sure but I think 720 is a default value for TV. Google around. Maybe
you can find more info about it.

> . In the frames of a lot of movement I noticed the picture is covered
> with VERY BIG squares! While at the scenes of a little movement, the
> picture is quiet well.

Maybe your PC does not have enough power so the codec can create the
best output or it was encoded in a crappy way.

> . As I try to do make second pass (the same command differs in vpass=2
> only), - as I understood, for the better quality - the more passes, the
> better picture is - in my case quality becomes worse and not better!

No idea.

> So, if any comment, suggestions, please share them with me.
> 
> I have mplayer-1.0-0.16.pre7.2.fc4 that I made out of src.rpm.
> Thank You!
> 
> -- 
> Best regards,
> Strong.

Regards,
Patrick