Re: Space saving tips

Le 27 avr. 06 à 13:43, ffmpeg-user-request@xxxxxxxxxxxx a écrit :

> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 26 Apr 2006 11:03:54 -0400
> From: T <mlist4suntong@xxxxxxxxx>
> Subject: [Ffmpeg-user] Re: Re: Space saving tips
> To: ffmpeg-user@xxxxxxxxxxxx
> Message-ID: <pan.2006.04.26.15.03.53.936795@xxxxxxxxx>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On Wed, 26 Apr 2006 10:53:25 +0200, Michel Bardiaux wrote:
>
> > You force the output to be CBR at thrice the input bit rate. Seems
> > normal that you get a file thrice as big.
>
> I knew something is wrong, otherwise I don't need to ask. Having  
> seen your
> message, I still don't know what is wrong and what to do.
>
> > To stuff 4 such avi's in 1 DVD, I think people put 4 divx-compatible
> > avi's in an ISO filesystem on a *data* DVD. DIVX-compatible DVD  
> > players
> > should be able to play that.
>
> thanks for the tip, but that doesn't apply to me.
>
> tong

use VBR and DO NOT REDUCE THE BITRATE (...do you want some "buffer  
underflow"? ;-))))
-b 9000 -maxrate 9000 -qmin 2 -qmax 20 -bf 2
(and not just -b 4000 !)

with VBR, the size of your encoding depends only of the complexity of  
your input
Divx is a compressed format (= the input is yet cleaned during  
encoding). If there is no compression aretefacts in your Divx, you  
can make from 4 hours to more in one DVD.
If I give to ffmepg an input from my dvd-recorder (Television), I can  
place 3H by DVD (and no more), due scories and "grain" of the input
It always depends of the number of information of your input.

bye

Hervé