[MPlayer-users] vbirtate

[Pablo Morales]

I just wanted to increase the bits  to improve quality, but it seems that's
not alwayss the case, at least in this case, it seems that I will finally
end up with a 700 MB avi file and not two 800 MB with better quality, I give
up... no more pain :)))

Thanx for your time.. very kind of you

----- Original Message ----- 
From: "Wayde Milas" <wmilas at rarcoa.com>
To: "Pablo Morales" <pablo.morales at abitab.com.uy>; "MPlayer usage questions,
features, bugreports" <mplayer-users at mplayerhq.hu>
Sent: Thursday, February 26, 2004 11:32 AM
Subject: Re: [MPlayer-users] vbirtate


> On Thu, 2004-02-26 at 05:17, Pablo Morales wrote:
> > HI there guys.
> > I'm having this problem, I'm trying to encode a  vob file with this
> > parameters to have it fit in two 800MB CD, ( one file of 1600GB ) the
> > problem is that mplayer goes down the vbitrate I tell it to use, it
doesn't
> > matters if I use vqscale=2 or vbirtate=3000, mplayer always end in a
> > vbitrate that varies from 900 and  1700, and the file size reduces and
is
> > not what I want.
> >
> > I'ts there a way to force a vbitrate?, I tried with vrc_min/maxrate, one
> > pas, two pass, but it's the same, this is not the first time that
happens to
> > me, with some vob or dvd works fine, with others, it's pure pain, and
cannot
> > rip them, If I include trell, cbp to the list of parameters  it's worst,
if
> > goes down to a vbitrate of 320,  I'm usign mplayer pre3.3.3.
> >
> > Any idea, i't a bug? , it' me? thanx..
> >
> > mencoder dracula2000-.vob -o Dracula2000.avi -ovc lavc -lavcopts
> > vcodec=mpeg4:vbitrate=2000:mbd=2:mv0:v4mv -vf
> > crop=714:480:4:0,scale=512:384 -sws 7 -sid 2 -aid 128 -oac
mp3lame -lameopts
> > cbr:br=160
>
> You are describing a sitation where q=2 an its not using 3k bits on
> average. Thinka bout it. Thats a GOOD thing. At q=2 mplayer is using all
> the bits it needs and it still has leftover bits its not using.
>
> If you REALLY want to inflate your bit stream, try not scaling as much.
> You'll preserve more data for the compressor to us, thus elevating its
> need for a higher bitrate.
>
> Basicly, if you tell the encoder to use X number of bits, but it only
> takes X-Z number of bits to encode the stream and the lowest quantizer
> you ahve supplied, its going to ignore your bit stream maximum number
> and jsut use what it needs.
>
> wayde