[x264-devel] Re: no gain in 2PASS for very low bitrates

[shauli rozen]

thanks to all of you.


On 12/22/05, Guillaume POIRIER <poirierg at gmail.com> wrote:
>
> Hi,
>
> On 12/22/05, shauli rozen <shauli.rozen at gmail.com> wrote:
>
> > >How many frames? 2pass doesn't do much on short videos, other than
> giving
> > >more accurate bitrate. It only matters when there's many scenes of
> varying
> > >complexity.
>
> > the movie is 300 frames long , maybe that is not big enough for the
> 2PASS
> > to take effect?
>
> Yes, that's indeed too short. I couldn't tell you precisely around how
> many frames 2pass makes a difference (as Loren said, it depends on how
> many different scenes you have). It's probably safe to try with
> several thousands frames (for instance 5min = 5*60*25 = 7500 frames)
>
> Guillaume
> --
> Life is pleasant. Death is peaceful. It's the transition that's
> troublesome.
>    Isaac Asimov (1920 - 1992)
>
> MPlayer's doc is offline. Find some fresh one here:
> http://tuxrip.free.fr//MPlayer-DOCS-HTML/en/
> http://tuxrip.free.fr//MPlayer-DOCS-HTML/fr/
>
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>
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