[MEncoder-users] h264 3-pass mode

Justin Randall jrrandall at gmail.com
Wed Jan 17 03:14:39 CET 2007


This is the way that x264 and mencoder chose to implement the pass
filter. Don't ask me why they did it that way, it probably made the
most sense at the time.

Justin

On 1/16/07, Joe Emenaker <joe at emenaker.com> wrote:
> The Wanderer wrote:
> > No. 'pass=2' is for when you will be doing exactly two passes. When you
> > will be doing more than two passes, every pass except the first one
> > should use 'pass=3'.
> >
> > The syntax is slightly confusing,
> "Slightly"?
> > but I was unable to think of a better
> > one which would fit the circumstances at the time; apparently no one
> > else was either, so there you have it.
> Well, I'm guessing that the circumstances were that you had to be
> compatible with the existing ("pass=2" means last pass) syntax for the
> two-pass encoders? If that's true, how come you couldn't support
> something like "pass=1of3", "pass=2of3", and "pass=3of3". Or, if you can
> do an arbitrary number of middle passes, then why not "pass=start",
> "pass=intermediate", and "pass=end"?
>
> - Joe
>
>
>
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>


-- 
Justin Randall
617.733.4107



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