Exported video with flickering black color and change in color tone

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Hello,

I've noticed a serious issue in my exported videos from Camtasia 2019.
While in canvas the video looks good, but in the exported video some sections of my footage have black flickering and change in color tone.

The only effect I've put on the video track is "remove a color" (green).

And most surprisingly is that this problem occurs randomly e.g. if I export the same section 5 times, 1 exported video will not have these problems. 

Can anyone help with an idea of how to fix this?
Any help is appreciated here. Thanks.

Please see the comparison of good export and bad export in this video.




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Maris Briedis

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Posted 1 month ago

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Rick Stone

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Might want to change the YouTube settings from private to possibly unlisted.


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Maris Briedis

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sorry. youtube video should be available now. 
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Rick Stone

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Probably just my own setup, but honestly, I don't notice any flickering. I even went full screen. And although the skin tone did become just a fuzz darker, it really wasn't enough to tell at first glance. Perhaps others will see it differently.
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Rick Stone

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One thing I've noticed about the "Remove a color" feature is that it can be difficult to get a nice and super clean removal. Just a couple of weeks back I was attempting to do this with some animated hearts. They were on a green screen. Camtasia didn't look too bad in the editor, but when I watched on my second monitor, it was horrible. Each heart had a "buzzing" fringe of green dots surrounding it and making them appear as if they were "sparkling". NOT the effect I was after. What the hearts were playing against was a dark background.

What I finally ended up doing was to find some similar hearts against a solid black background and using the "Remove a color" effect on that. Because the background of the Hearts was black, whatever "fringe" may have been present was masked because it was playing against that dark background and it came out MUCH better.

Just tossing this out in case it may trigger a thought.

Cheers... Rick :)
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kayakman, Champion

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play looks fine to me; no flickering, etc
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Maris Briedis

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just in case, I've also uploaded the video file in the googel drive https://drive.google.com/open?id=1ufFGtK_622ExHTHJQtIV2yYS-PgEMcmJ
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Joe Morgan

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Well, I have no problem seeing what you report in both uploads.

At the color shift, are these different recordings? Or one long recording with edits?

Are you applying remove a color to each segment, or all segments as a whole?
Explain your workflow a bit. A screen shot showing Camtasia timeline and all.Might be helpful.

Regards,Joe
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kayakman, Champion

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I watched your 2nd video ...

Feedback On Flickering And Color Change Issue 2019-11-09
https://www.screencast.com/t/1Zj6zTmYG

after further contemplation, looks like the lighting changed?

look at the watch face

could that explain the color change?
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Joe Morgan

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In a nutshell.................

This white flashing your experiencing........Has to do with the remove a color settings.


When you use remove a color, you should use the color picker to select the background color.
In most cases you should pick an area close to your body.


Then you adjust for that color. The tolerance slider is the most effect adjustment you have.
If the tolerance is right, there will be no"Flashing Artifacts"
However, there may be some green fringing still surrounding you.This is a give and take setting, you have to settle for the best you can acquire.
  In the GIF below the tolerance setting is pretty good. The setting is 13%,I'm using a high quality screen, the right lighting,etc.


Here, I cranked it up 18.Just to show you how a small change, can create the effect your reporting.



Unfortunately, remove a color has its limitations. Lighting, the quality of camera you use, backdrop quality, etc. All have a bearing on how well remove a color works.
Tolerance is the main setting, this is the setting that packs the biggest punch.
Generally, you set it as high as you can. With a setting of less than 20 being the norm.For myself, I can't exceed 14 or 15. 10 is the default value.

The other setting are somewhat self explanatory.
Softness applys a feather to the hard edge surrounding you. Softening it to help blend you into the image.

Hue can change tint a bit.I don't use it.

Defringe? Just another type of tolerance adjustment for the most part.I've found when I try to use it. Any adjustment over 1 or 2 tends to do more harm than good. This is something you have to play with yourself and draw your own conclusions. It may be good for your footage?

At best, you can play around with the settings and find what works best for you.

Shoot for perfection, get as close as you can.
Odds are, you'll never achieve perfection. You'll have to settle for as good as  it gets.

That green tint on your face? Has to do with the settings.However, where you sample the color from background can have a Huge Impact.
Even if the background looks the same everywhere to the naked eye.You'll find when selecting different regions.The actual color is a bit different. This effects how well the settings work.

Bottom line................. you have to play around with filter and get a feel for what setting do what.Zoom in to 300%, adjust a setting and watch what happens.

Regards,Joe 
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Maris Briedis

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Thanks for all the feedback. It definitely is the "remove a color" effect that creates that flashing, but the issue is that for some sections in the video it does create flashing and for some it does not. And even the same section is flashing in one export and not flashing in other export. 

But on canvas, all looks good.

The video source is the same one long recording, same lights, same effect applied to the whole section (and some parts of the section are split afterward)

I will try to play around the settings, but anyway, this is frustrating, as I've spent 7 days editing a 2-hour training video and the export does not look consistent. 
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Joe Morgan

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I missed your comment that rendering is inconsistent. Sorry about that.

Have you tried disabling your graphics card in editor preferences?