Green screen removal

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My green screen feature not working in Camtasia for Mac. I'm doing my fifth video... same light, same background as before... but now not able to remove my green screen, why?
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Gunnar

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Posted 6 years ago

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kurrykid, Champion

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We need more information. Can you post a quick video showing the issue or give us a better description of what's going on?

Thanks.
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Gunnar

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kurrykid, Champion

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Gunnar,

Thanks for the video...interesting issue. I tried to duplicate it and couldn't. As you can see (and I'm sure your aware), the color isn't changing under the magnifying glass. It should be changing to what ever color is underneath it and yours isn't when you are over the canvas. the screen prints below show each time you captured, the color under the magnifying glass looks like the color of the CMAC interface.

http://www.screencast.com/t/DiZ5ItvzTVw

http://www.screencast.com/t/xg0NmMSw

The first time you do it is your video, you can see the magnifying glass is picking up the different colors because you move your mouse a little bit and I can see the blue and few other colors...it's not as easy to see the second time but based on this, it appears to work. There is something that is happening on the canvas once you get over there.

I am wondering if you can try a brand new project with just that video and nothing else...just to see if there is something in this project that is bugging it. Maybe a previous setting or something that is on top that's not visible...backing up a little and may be the best way to figure out what's going on.

Dave
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Gunnar

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Thanks Dave...it ́s working now. I created a new project and it worked perfectly.

When a copied it into the previous one again a music file in the line above was causing some problem. I put it under and then it was ok

Gunnar
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kurrykid, Champion

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Glad you got it working Gunnar...thanks for letting us know.

Dave
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Gunnar

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Hi Dave
Again I ́m working with Green screen and It ́s working all right in general... still.. It needs to be better still...I'm getting "white noise" here and there...as my green screen is coming trough in few places...also not getting as clean edges as I would like to see. Here is a sample, a draft (slides on top not in right places etc) I'm working on https://www.youtube.com/watch?v=7xIUky...
Problem start at 1:51 and is very bad at 2:27
I have looked for demo on how to adjust Tolerance...Softness...Hue and Defrenge but cant find it.
In the video I refer to...its all in one take with the same light source all the time.

Hope you or someone can help

Gunnar
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kurrykid, Champion

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I've been having the same problems...I can't get a good key with CMAC. Now I don't have perfect lighting but even when I download a professional clip, I still have a hard time with a "perfect" key. With your set being the same, I'm surprised that you are having problems further into the video.

The Techsmith demos seems to be very good and I think most of the time, they are just throwing green material up on their office wall.

I has responded to a green screen blog post that is here:

http://blogs.techsmith.com/tips-how-t...

and asked how they got such a good key and Mike from Techsmith responded with a quick video on how he did it (which is very cool that he did a video for me). It doesn't provide a ton of information but he does show how he does it (he is using Camtasia Studio). Check it out:

http://www.screencast.com/t/EI0Qw7srVU

At this point, I still use PPro for my Chromakeying because its the only way I can get a really good key.

Sorry I'm not more help.

Dave
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John S. Richards

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Gunnar,

In your example, you are too close to the screen, try to keep a 2 to 3 meter gap.

Light the green screen uniformly and independently from the person.

People need to be lit separately. 3 point lighting works best. Ensure you have a top back light to highlight head & shoulders profile, this helps separate you from the background.

Keep the screen screen tight with no wrinkles.
Try clothes pegs or binder clips with string or elastic cords to keep sides tight.

More light on a shadow free green screen with a larger talent to screen gap will work.

Pick clothes that are camera friendly. Black or white shirts can look far to dark or bright on camera. Test a light gray or pale blue shirt. I think you will see improvements.

Hope this helps.
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Gunnar

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Thanks John...and Dave

Good points and I see know that all the wrinkles are causing problem.
I did try Adobe Premier and at first glans Camtasia is doing a better job. I wiil do better next time.
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John S. Richards

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Gunnar,

For tips watch TV News Broadcasts.

Look at each side of a presenter's face.
One side will have a high Key light, the other a lower Soft light.
Look at the direction of the under nose shadow.
Does the presenter look flat or have depth?
Does skin tone look good?
What can you see?

What clothing colors are being used? Do colors balance?

For speaker sets - try to set up and light a set, then make a photograph.
Photos of real sets always look best. Simulated images risk looking false.

In Snagit you can use the Blur tool to soften a photo you made.
This can help provide the visual depth of field you want to see.

A simple project goal.
What do you want to see, and how do you want to see it?
if it looks like what you want. you have done a great job!

Testing helps. If it does not look like what you want to see, try again.
You will get to see what you want to see with testing.

When you find a best distance from speaker to green screen, or have more questions, please post again, this may help others.

Good luck with your project!

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