Re: Clip & Zoom questions (was: Re: [dvd::rip] (no subject))

"Brian J. Murrell" wrote:

> OK.  TBH, I have never understood the whole Zoom Calculator, but giving
> it a try, I have changed "Auto clipping" to "Yes - use clip1".  What am
> I supposed to do now?  I see a whole list of Zoom calculations, none of
> which show any kind of clipping in Clip1.  Clip2 does show some
> clippings, nothing more than 4 for any of the clip values though.

Looks you missed hitting the "Refresh" button... or do you use 0.97.1, 
which doesn't have this button anymore, because the list updates 
automatically on parameter change?

> > This that works only for HQ resizing, but you
> > can switch fast resizing on again later and modify the values slightly 
> > by hand to get the fast resizing
> 
> Yeah, I was promoting (automatically, in clip1 with auto-detection)
> clipping as close to the picture as you can and still fast resize, then
> clip the remaining in clip2.
> 
> > Ok, but then you have of course some 
> > aspect ratio error.
> 
> Oh?  This method causes an aspect ratio error?

Of course. With HQ resizing you get a nearly perfect aspect ratio. If 
you switch on fast resizing then and you need to correct some values 
(e.g. the width/height values to be divisble by 8), this introduces some
AR errors (usually very small/invisible). The Zoom Calculator window 
lists them all, btw.

> BTW: with the the gtk2 version, I don't seem to be able to select a top
> clip1 of 56 and any value > 24 for bottom clipping and use fast
> resizing.  Shouldn't any multiple of 8 for the bottom be allowed and
> still allow fast resizing?

It's not only the "multiple by 8" rule. For details about the 
limitations of fast resizing, please refer to:

  http://www.exit1.org/dvdrip/doc/gui-gui_clip_zoom.cipp#clip_zoom_fast

Regards,

Joern

-- 
Joern Reder
supporting:   http://www.zyn.de/
unbelievable: http://www.exit1.org/
CPAN:         http://www.perl.com/CPAN/modules/by-authors/id/J/JR/JRED
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