This IS the Avid L2: Re: [Avid-L2] Re: QT video levels?

Hi Mike:

I haven't seen it documented, only observed what happens under
testing. It looks to me like there is a flag set in the file that
indicates it should be interpreted as RGB, rather than a change to
underlying pixel values. But the effect is the same (of dropping the
blacks and lifting the whites) unless you can force another application
to disregard the flag. For instance, in After Effects you can fool
around with colour management as I describe at the bottom of this thread:
http://community.avid.com/forums/p/113013/677905.aspx

You could also download a trial version of Avid 6.5 and do your own
testing. The belle-nuit test chart can be downloaded here:
http://www.belle-nuit.com/test-chart

Sounds like a good exercise for one of your students!

Cheers,
--Michael

On 13-05-08 8:15 AM, michaeljshen76 wrote:
>
> Michael, thank you so much for the reply.
>
> Does "flagged" mean the same as "converted", i.e., the blacks will go
> down, the whites will go up, and the levels will be clipped on a video
> monitor?
>
> Does anyone know if 709 Same-As-Source ProRes exports are working in
> version 6.5? It would be a lot easier to upgrade one school machine to
> 6.5 and export all the student sequences using that machine, rather
> than convert all the films to DNxHD.
>
> Sigh.
> -Mike
>
> --- In Avid-L2@yahoogroups.com <mailto:Avid-L2%40yahoogroups.com>,
> Michael Brockington <brocking@...> wrote:
> >
> > Yes, I believe your colour levels will be flagged as RGB on export.
> >
> > I guess one workaround would be to transcode the finished pieces to
> > DnxHD at a suitable bitrate, and export that same-as-source using
> > 601/709 levels.
> >
> > Cheers,
> > --Michael
> >
> >
> > On 13-05-07 9:48 AM, michaeljshen76 wrote:
> > >
> > > I have a number of students exporting their finished thesis films.
> > > They've been editing in on MC 6.03 in Apple ProRes MXF. The plan was
> > > to color-correct in the 709 color space, and then have them export a
> > > Same-As-Source .mov using 601/709 settings. This would be their final
> > > master.
> > >
> > > Am I correct in understanding that the 601/709 setting won't work,
> and
> > > that color levels will expand to RGB levels upon export? What's the
> > > best workaround for this?
> > >
> > > Thanks for helping my offline editor brain with these online
> conundrums!
> > >
> > > Cheers,
> > > Mike
> > >
> > > --- In Avid-L2@yahoogroups.com <mailto:Avid-L2%40yahoogroups.com>
> <mailto:Avid-L2%40yahoogroups.com>,
> > > Michael Brockington <brocking@> wrote:
> > > >
> > > > On 6.0.3 this flag seems to be set properly by Avid for DNxHD
> exports.
> > > > ProRes exports in that version seem to be always flagged as RGB.
> > > >
> > > > I reported some testing results here comparing DNxHD vs ProRes
> > > > same-as-source exports on Mac:
> > > > http://community.avid.com/forums/p/113013/677905.aspx
> > > >
> > > > I suspect not all applications observe the flag that is set.
> > > >
> > > > Cheers,
> > > > --Michael
> > > >
> > > > On 13-05-07 3:57 AM, Fabrice Altman wrote:
> > > > >
> > > > > So... moving on from the goose ;)
> > > > >
> > > > > Apparently there is an internal flag in the exported DNxHD QT file
> > > > > that is supposed to be set to either RGB or 709 according to the
> > > > > export settings.
> > > > >
> > > > > However, this flag seems always set to 709 on export from MC 5.5,
> > > > > whatever the export settings are. Can anyone confirm this is a
> bug
> > > and
> > > > > has been fixed in later releases?
> > > > > (The flag seems to work on export from AFX).
> > > > > Does a similar flag exist in ProRes?
> > > > >
> > > > > Cheers,
> > > > > F.
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> > >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>

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