[MPlayer-users] how to evaluate ripped dvd size

[D Richard Felker III]

On Fri, Sep 13, 2002 at 11:05:51AM -0500, Green, Shaun wrote:
>  
> >transition lines, greatly reducing the quality. Also you should make
> >sure that the image dimensions after cropping remain multiples of 16,
> >or at least of 8.
> 
> Actually for DivX4/5 decoding, the final resolution just needs to be a
> multiple of 4 in horizontal, even number vertical. However if you use ffmpeg
> for playing, then it may need to be divisible by 8.

No. It doesn't *have to* be a multiple of anything to play it with
ffmpeg, just with broken encoders/decoders like divx. The issue is
that YOU WILL WASTE BITS AND MAKE YOUR ENCODING LOOK BAD if it's not.
The issue is similar the what happens with black borders. There are
certain methods which an encoder could use to reduce the waste, but
I'm not aware that any encoders currently do this. Perhaps the ffmpeg
coders could explain whether ffmpeg takes such measures.

In any case, please send all mail about mplayer to the list, not to me
personally.

Rich