[MPlayer-DOCS] complete documentation

[Guillaume POIRIER]

'Nite,
Le sam 11/09/2004 à 02:34, Michael Niedermayer a écrit :
> On Friday 10 September 2004 19:18, Diego Biurrun wrote:
> [...]
> > > Maybe that isn't the right place to talk about features, but I'd like to
> > > point out a really cool XviD feature that could maybe get ported in
> > > lavc.
> > > It's called... turbo mode!
> > > Basically, what it does is during first pass of 2-pass mode, it uses
> > > simpler MV search fonctions and I think it also disables some CPU-hungry
> > > options. On my machine, the first pass will run at 40fps and 9fps, with
> > > not that much of a PSNR reduction actually.
> > > I wish it could be implemented in lavc.
> >
> > Well, Michael, what do you think?  Looks like Guillaume will improve
> > the documentation in return ;-)
> nothing stops the user from using different parameters in the first pass, 
> no 4mv, no trellis, SAD instead of SATD comparission func, ...
> thats all possible since 2pass is supported

I understand you point, though I still think a "turbo" wouldn't harm
lavc; in fact, it's more likely to improve lavc usability.
My point of view (I don't pretend to hold The Truth) is that while it's
possible to build a turbo mode "by hand" one you know more about video
encoding an lavc options (removing/replacing certain options by faster
ones on pass 1), it would be nice to have the front-end do it
automagically for you if you add "turbo" on your list of options.
I'm gonna have a look at how it is done in XviD and see if I can come up
with a simple patch...
But I'd first want to know if there's a chance to have such a feature
added to mencoder? If not, I don't wanna argue about it and loose some
precious coding time on it.

I hope that by now (even if I've been around for only a month) people
around here understood that I don't want to mess around and pretend I
know everything, 'cause that more the opposite, I just want to improve
MPlayer/Mencoder usability, should it be by writing docs or suggesting
ideas I picked from other projects.

Regards,

Guillaume