There is always info above 235 and below 16 because that's what cameras generate. If you have video spikes in the 100ire to 110ire range (or higher), those are in the 235 to 255 range. If you remap 235 to 255, then everything above100ire is clipped.
Oliver
--- In Avid-L2@yahoogroups.com, Jeff Cook <jeff@...> wrote:
>
> Sorry, hold on. There's something ABOVE 235? Then it's not properly mapped in the first place, right?
>
> --
> Jeff Cook
> jeff@...
> 703-980-1104 (cell)
>
> CookStudios.com
> Freelance Video Editing
> Washington DC & Portable
>
>
> On Oct 28, 2011, at 11:20 AM, "Terence Curren" <tcurren@...> wrote:
>
> > Huh? Then what happens to any info above 100 IRE (235 RGB) when you remap that to 255. There is nothing above 255, so what happens to the info above 235?
> >
> > That is what he means by "clipping". That video goes bye bye.
> >
> >
> >
> > --- In Avid-L2@yahoogroups.com, Jeff Cook <jeff@> wrote:
> >>
> >> That would be clipping, not remapping. There's clearly something else wrong. Remapping is redistributing, which is designed to translate for proper display.
> >>
> >> What you're describing would be simply displaying in the wrong format, which with the lack of file identification over the years (why did you ever have to tell an import what you thought the file was?), is not surprising.
> >>
> >> --
> >> Jeff Cook
> >> jeff@
> >> 703-980-1104 (cell)
> >>
> >> CookStudios.com
> >> Freelance Video Editing
> >> Washington DC & Portable
> >>
> >>
> >> On Oct 28, 2011, at 9:22 AM, "Nigel Gourley" <avid-l@> wrote:
> >>
> >>> Well.. When you export RGB the avid is remapping 16 to 0 and 235 to 255, So
> >>> this means the original image is clipped at the black and white points which
> >>> isn't good for the grade. Whereas 709 doesn't remap any levels.
> >>>
> >>>
> >>>
> >>> That's my understanding anyway..
> >>>
> >>>
> >>>
> >>> N
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> From: Avid-L2@yahoogroups.com [mailto:Avid-L2@yahoogroups.com] On Behalf Of
> >>> Fabrice Altman
> >>> Sent: 28 October 2011 11:47
> >>> To: Avid-L2@yahoogroups.com
> >>> Subject: [Avid-L2] Re: Export TIFF
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>> We need the 709 export setting to work.
> >>>
> >>> Sorry for the stupid question but why would you absolutely need 709
> >>> for file sequences ?
> >>> Your grading system has a no way to interpret RGB ?
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> [Non-text portions of this message have been removed]
> >>>
> >>>
> >>>
> >>> ------------------------------------
> >>>
> >>> Search the official Complete Avid-L archives at: http://archives.bengrosser.com/avid/
> >>> Yahoo! Groups Links
> >>>
> >>>
> >>>
> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > Search the official Complete Avid-L archives at: http://archives.bengrosser.com/avid/
> > Yahoo! Groups Links
> >
> >
> >
>
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