I had a chance to experiment today and it follows your experience. I did a same as source export from avid of the short opening section that showed the illeagal Red Channel Levels at the peak of a glow effect. Then I did a mixdown to DNX 220 of that section and did a QT ref of that. Both of these files maintain legal levels at the glow point. The initial file I put out with a QT ref and no mixdown still shows the illegal levels when linked back to ama. Also the two new files I made that are working shot the "set source settings" as greyed out when I right click on them but the problem file does not have this greyed out. I'm pretty sure this is due to some mixing of DNX 220X and DNX 220 in my timeline. So far no network complaints but now I know how to proceed in the future.
I'm just disappointed that I have to do a mixdown. I know they are quick but the additional media space will be a killer. I guess what I should do is not render the safe color limit effect and just mixdown instead to the track above it. That should satisfy all the needs and create no additional media.
--- In Avid-L2@yahoogroups.com, Mark Spano <cutandcover@...> wrote:
>
> When making a QT Ref, I have been burned too many times by weirdness
> (multiple codecs in the ref file, multiple bit/sample rate audio tracks,
> effects not rendering, etc.). To solve this, I always make a mixdown to the
> codec I want first. Then the ref points to exactly one media file for its
> video, and if I don't have a single file for the audio in my sequence, I
> mix that down as well.
>
> Mixdowns save lives.
>
>
> On Sun, Feb 2, 2014 at 12:38 AM, John Moore <bigfish@...> wrote:
>
> >
> >
> > I just noticed an oddity on a series I'm doing. I've had no QC issues
> > from the network but I'm curious about something I found when I ama'd the
> > final output file. My workflow is an Avid Mac SNDX V 5.5.3.7. 1080i/59.94
> > project. DNX 220 media. I export a QT ref of my sequence which has an
> > upper track Safe Color Limit Effect set to 16-235 and 422 checked. Playing
> > out the sequence everything is legal and triggers no 1% alarms with Tek
> > Defaults. The same is true when I digital cut to HDCam. I use QT Pro to
> > make a self contained QT in Avid DNX. When I ama back to this file and
> > manually set the field order to upper everything plays fine and color bars
> > are dead on. What I found was there are a few frames of a Sapphire Glow
> > transition that trigger the alarms from the ama'd file. The same frames
> > are fine on tape and straight out of the sequence. Given I exported a QT
> > ref the media for these few frames is the render of the safe color limit.
> > At these sections the Red Channel goes too high when looking at the ama'd
> > file. Again sequence fine but the ama'd file is not. I've had no
> > complaints from the network. I didn't get a chance to experiment yet but I
> > will start by importing the file traditionally and see if the same error
> > exists there. I can't really see why when the color bars come back correct
> > why these glows seem to gain a boost in the red channel to trigger the
> > alarm. These are soft glows not specular spikes like I see sometimes.
> > Curious if anybody has a thought on this.
> >
> > Is there another method other than amaing back into Avid that I can use to
> > check the essence of the QT file?
> >
> > John Moore
> > Barking Trout Productions
> > Studio City, CA
> > bigfish@...
> >
> >
> >
>
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