Seems more like it has something to do with your graphic levels freaking
things out, but that's just a guess.
Perhaps you can post some examples for people to test with. Not in front
of a system today, myself.
J
On Tuesday, February 19, 2013, johnrobmoore wrote:
> **
>
>
> Yes you are correct I use alpha channels on imports all the time. What was
> it about alpha channels that wasn't supported originally? Was there
> something about the DNX codec that didn't support an alpha channel early
> on? or as you say am I totally confusing it with ProRes? Well that
> withstanding I still don't see how an Avid export of a self contained DNX
> QT carries over any tie to whether the source sequence had a keyable
> graphic in it.
>
> --- In Avid-L2@yahoogroups.com <javascript:_e({}, 'cvml',
> 'Avid-L2%40yahoogroups.com');>, electropura212 wrote:
> >
> > You are incorrect about DNX (other than 4444) not supporting Alpha
> > channels. I use them all the time.
> >
> > You may be thinking of Apple Pro Res, which has that limitation.
> >
> > Being that you are exporting Millions and not Millions plus, i don't
> think
> > it's related to your problem. Just trying to keep the misinformation to a
> > minimum.
> >
> >
> >
> > On Monday, February 18, 2013, John Moore wrote:
> >
> > > **
> > >
> > >
> > > On a current project we output to HDCam tape with no color correction
> and
> > > send the tape to a facility with Baselight. When there are fixes we
> export
> > > small same as source QT .movs of the change sections and the reinsert
> them
> > > at the Baselight facility. I've just been informed that when we export
> a
> > > section that has keyed in graphics, like a score board the Baselight
> whacks
> > > out when these are imported. The blacks turn purple and the colors are
> > > off. Their solution is to convert the Avid DNX 220 and perhaps an
> > > occasional 220X to ProRes and then they import properly into Baselight.
> > > There was some thought about the alpha channel from the source
> graphics but
> > > this makes no sense as Avid doesn't support any Alpha export and DNX
> has no
> > > Alpha channel support other than DNX 444 as far as I know. There has
> been
> > > in the past a mis importation of RGB graphics as 709 which leads to
> video
> > > well under 0 and over 100%. Since I've been on the project I correct
> > > this issue but I'm told they still have problems importing anything
> with a
> > > keyable graphic. A clip that is just a field source from a file is no
> > > problem. A graphic Animation is no problem but when the same animation
> has
> > > a keyable text graphic over it then there are problems. All these
> elements
> > > except the field source files are coming from graphics using AE. This
> all
> > > makes no sense to me. I checked my QT exports and they all show as Avid
> > > DNX with millions not millions + so there is no alpha channel that I
> can
> > > detect. I'm also told the facility has or is thinking of checking with
> > > Baselight to see if the problem is on their end. Any of our Baselight
> > > Guru's got any insight about importing issues with Avid DNX220 and or
> > > 220X. I'm am at a loss as I've not got any baselight chops to draw
> from.
> > >
> > > John Moore
> > >
> > > Barking Trout Productions
> > >
> > > Studio City, CA
> > >
> > > bigfish@...
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
[Non-text portions of this message have been removed]
------------------------------------
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Tuesday, February 19, 2013
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