[MPlayer-users] trell + vbitrate

[D Richard Felker III]

On Thu, Feb 19, 2004 at 01:26:53PM -0300, Pablo Morales wrote:
> HI there guys.
> 
> I've been spending alot of time trying to rip some dvd and I come up with
> some behavior that I do not understad.
> I try  to rip a dvd using the basic options,
> vcodec=mpeg4=mv0:mbd=2:v4mv:vbitrate=1600
> With this parameters, mp`layers begins to rip, it reaches 1600, then it goes
> down to 1200 then rises again and stays betwen the range og 1560, 1600
> that's good, this happens  between the fists 5% of encoding, then, I do not
> why, it begins to decrease as los as 850, do no not why.
> 
> The same happens if I increase the vbitrate to 5000, o what ever,  an even
> with vqscale=2, if I include the trellis options, it's worst, for example
> vbitrate=1600:trell:cbp,  mplayer begins to encode, reaches 1300, then goes
> down to  800, and sometime less than that., if I include vqscale= 2 with
> trell, the same,  gos up to 1300, then begins to descrease slowly to 800, or
> even less..
> 
> I'm using 1.0pre3.3.3, I  installed previos version and the same behavior,
> it seems as if mplayer wanted to encode at the bitrate it wants.
> 
> I was trying to rip Tomb Rider- the cradle o life, I'm using freebsd 5.2,
> and have no installed libfame library, is that library needed for encoding?
> 
> Can someone explain why can this be happening?

Probably the scene it's encoding is simple/still/all black. It can't
use more bits that it needs. If you have a complaint about the
quality, you should say so, but complaining about low bitrate usage is
pointless. It just means lavc is good.

Rich