[MPlayer-users] Do I need vpass=2 in multi-pass mode of mencoder?

[D Richard Felker III]

On Sat, Feb 26, 2005 at 10:01:53PM +0100, Matthias Schwarzott wrote:
> On Saturday 26 February 2005 00:40, Dominik 'Rathann' Mierzejewski wrote:
> > On Friday, 25 February 2005 at 16:02, Vijay Gill wrote:
> > > Hi,
> > >    I am encoding my recorded programs with vpass=1  and vpass=3,
> > > vpass=3. In other words 3 passes. I have encoded only one program
> > > though. Do I need vpass=2 before vpass=3. From the document it seems I
> > > do not.
> >
> > Correct. vpass=2 is the old 2-pass mode. vpass=3 is the new multi-pass
> > mode, that works for passes 2, 3, 4 and so on.
> >
> No the question appears: Why should one use different parameters for two and 
> threepass mode. Why not use the same vpass=3 for twopass-mode as well. (And 
> then possibly rename this to vpass=2 but with new meaning). Does this make 
> any difference?
> 
> Or in other words: Does vpass=3 has any significant disadvantages compared 
> with vpass=2 in second pass of twopass encoding?

It moves/overwrites/replaces the log file during the subsequent
passes, which can be bad, especially if you have existing scripts that
rely on the old behavior.

Rich