[MPlayer-users] Re: Mencoder problem

[Thomas Buchmüller]

   8787164 Apr  2 16:49 file1_x640y512kbps1250.avi
  12427206 Apr  2 16:43 file2_x720y576kbps1800.avi

These avis are equal long (about 60 sec). One is encoded with br 1250 the
other one is encoded with br 1800. Just to have the same quality the one
with bitrate 1250 is a little bit smaller (resolution). But the win of
size (in this case 1/4 is just because i used a smaller bitrate, not
because the resolution is lower).

If you encode with smaller resolution but with the same br, the filesize
will be the same.


The command

mencoder file1.avi -ovc divx4 -x 120 -y 90 -divx4opts br=100 -sws 2 -o
file2.avi

should produce a very small file.

Bye Tom

An all the information i have can be found in the manpage and in
html-docs.

On Fri, 26 Apr 2002, Ian Truelsen wrote:

> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Thomas Buchmüller writes:
>
> > [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> > You should use lower bitrate.
> >
> > RTFM about mencoder, or take a look at the manpage
> >
> Okay, thanks for the response. However, it is the documentation that has
> suggested that this is the way to go.
>
> The br=xxxx option is not very clearly described and the movie rescaling
> description suggests that you rescale to get a smaller file size using the
>  -x and -y options. That, as I said before, gives me exactly the same file
> size, no matter what I set them too.
>
> Using the divx4opts bit rate option, I have tried several settings from 1300
> to 100 and I still get the identical file size.
>
> Is there actually some set of options that can be used in mencoder to reduce
> the size of an avi file?
>
> Ian Truelsen
> Masters program in Philosophy
> University of Manitoba, Winnipeg, Canada
> BA (Wilfrid Laurier University)
> Email: ian at ihtruelsen.2y.net
>
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