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WaveForm Monitor Questions

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Bryce DouglassWaveForm Monitor Questions
by on May 26, 2015 at 3:56:21 am

I don't need to know a history of Waveform Monitor just these answers.

1. Is 0 in the waveform monitor true Black when working with Digital?

2. Do I have to have the brightest part of the picture reaching 100 in the waveform monitor or is it okay to occasionally have it reading 90 or 80?

3. There is a little checkbox above the Waverform monitor that says "7.5. IRE" Do I have it checked or unchecked?

I'm mostly distributing my video to the Web but will occasionally submit some videos to Public TV.

Thanks,

Bryce


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Tero AhlforsRe: WaveForm Monitor Questions
by on May 26, 2015 at 6:10:41 am

1. Yes
2. It doesn't need to be at 100
3. https://helpx.adobe.com/premiere-pro/using/using-waveform-monitors-vectorsc...


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Bryce DouglassRe: WaveForm Monitor Questions
by on May 26, 2015 at 3:11:19 pm

The reason I was asking was because someone told me that with Digital black is -3 not 0. The color bar generator in Premiere Pro shows that Black is -3 when 7.5 IRE is unchecked.


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Joe Barta IVRe: WaveForm Monitor Questions
by on May 26, 2015 at 3:35:45 pm

What you are seeing is the Pluge in SEMPTE color bars, the three narrow vertical black bars in the lower right corner. The Pluge is used for monitor calibration. Notice that the left one is -3, the center is 0, and the right is +3. The space to the right of those is 7.5 for other calculations. Digital black is 0. The other black chips in the color bars should be reading 0 on your scope.

Joe

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Bryce DouglassRe: WaveForm Monitor Questions
by on May 26, 2015 at 3:46:40 pm

All the PLUGE colors are reading -3 though. Not one is showing 0


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Joe Barta IVRe: WaveForm Monitor Questions
by on May 26, 2015 at 4:11:35 pm

Here is where they show up on the scope in Premiere, color bars generated by Premiere. I also use an external scope which shows the same reading.



Joe

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Bryce DouglassRe: WaveForm Monitor Questions
by on May 26, 2015 at 4:52:19 pm

AHHH Now I see what you mean. I for some reason didn't notice that earlier. So Black in Digital is 0 and not -3?


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Joe Barta IVRe: WaveForm Monitor Questions
by on May 26, 2015 at 6:02:04 pm

Correct.

In your video clips you want the pure blacks in the image just barely touching the 0 line and the pure whites just barely touching 100. Everything else falls in between.

If you have trouble with a clip, apply the Broadcast Colors filter in Premiere and it will clamp down the whites to legal levels.

Joe

Living the SuiteLife!
Stuff for editors http://www.cafepress.com/suitelife

http://www.facebook.com/pages/SuiteLife/1524456414462851?ref=hl


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David ForsythRe: WaveForm Monitor Questions
by on Jun 3, 2015 at 4:15:56 am

Hi all,

Greetings from the Great Land Down Under...

I am a bit hesitant to use the Premiere Pro CC (PPCC) scopes.

First, I'm working in PAL. I have a graphic of 100% (EBU) bars. When I bring it into my... OK, I'm going to use the "A"-word, my Avid, the Waveform monitor in the Colour Correction tools shows black at 0% (0mV)and white at 100% (700mV) which is just what I would expect. When I look at the same bars in PPCC, the white bar is reading below 100% and the black bar above 0%. Now I get it because in PPCC, white is 255 and black is 0 which is all well and good for full-range RGB world but not helpful when having to deal with broadcast limits. Is there a way to have the PPCC waveform scale display 0mV - 700mV?

Ideally I'd like to have a warning system in PPCC which displayed when my luminance, composite and RGB gamut limits were being violated rather than having to use a rather inelegant "limiter" on an adjustment layer.

Cheers,

Dave Forsyth


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