Highlighted

ROTO BRUSH TOOL doesn't work

Community Beginner ,
Oct 15, 2017

Copy link to clipboard

Copied

Hello, I want to use roto brush tool, but it doesn't work. When I choose roto brush tool and start selecting what I want, the whole video border turns purple, meaning the whole image is selected. I don't know what I need to do, to just select what I want.

Any suggestions?

Adobe Community Professional
Correct answer by Rick Gerard | Adobe Community Professional

So I took a screenshot of your screenshot and as I suspected there are very few contrast and color differences in your footage for Rotobrush to work with. I didn't get the entire frame but when I tried to mask out the left leg there was so much of the image selected using the default Rotobrush settings that I could tell that Rotobrush would have a very hard time finding edges. The solution is to do some color correcting before you try and use Rotobrush. My first choice was to add Black and White and really jack the values around. It became much easier to cut out the left leg. When you have the roto completed, propagated and frozen, then you can turn off the color correction or just delete it. I hope this helps.

Screen Shot 2017-10-16 at 8.00.03 AM.png

Views

16.0K

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more

ROTO BRUSH TOOL doesn't work

Community Beginner ,
Oct 15, 2017

Copy link to clipboard

Copied

Hello, I want to use roto brush tool, but it doesn't work. When I choose roto brush tool and start selecting what I want, the whole video border turns purple, meaning the whole image is selected. I don't know what I need to do, to just select what I want.

Any suggestions?

Adobe Community Professional
Correct answer by Rick Gerard | Adobe Community Professional

So I took a screenshot of your screenshot and as I suspected there are very few contrast and color differences in your footage for Rotobrush to work with. I didn't get the entire frame but when I tried to mask out the left leg there was so much of the image selected using the default Rotobrush settings that I could tell that Rotobrush would have a very hard time finding edges. The solution is to do some color correcting before you try and use Rotobrush. My first choice was to add Black and White and really jack the values around. It became much easier to cut out the left leg. When you have the roto completed, propagated and frozen, then you can turn off the color correction or just delete it. I hope this helps.

Screen Shot 2017-10-16 at 8.00.03 AM.png

Views

16.0K

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Oct 15, 2017 0
Adobe Community Professional ,
Oct 15, 2017

Copy link to clipboard

Copied

The Roto Brush tool should work as expected.

Resetting your preferences is probably the quiickest way to restore the tool.

If on Mac, hold command option shift when you start AE.  If on Windows, hold control alt shift.  You should get a dialog box asking if you want to reset your preferences.  Choose Yes.

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Oct 15, 2017 1
Most Valuable Participant ,
Oct 15, 2017

Copy link to clipboard

Copied

Without knowing what your footage looks like, nobody can tell you much. Presumably the footage simply doesn't have enough contrast to allow the tool to detect any edges, but who's to say? You'd have to provide at least a screenshot.

Mylenium

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Oct 15, 2017 0
Community Beginner ,
Oct 16, 2017

Copy link to clipboard

Copied

Warren Heaton: I did as you say, but it still doesn't work.

Mylenium: Here is screeonshot. I tried on another video where I know edges are better, but it still didn't work. I tried some things, and I click on the icon I marked with red (set IN point...), and then this one frame where I click it, it choose what I want. But then another frame not anymore. I know this isn't right way to do it, but I guess it shows there are enough edges. So I really don't know what to do.

roto brush.png

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Oct 16, 2017 0
Most Valuable Participant ,
Oct 16, 2017

Copy link to clipboard

Copied

As a start, try working at 100% zoom and full resolution. This may merely be an issue with the effect operating on the reduced res.

Mylenium

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Oct 16, 2017 0
Adobe Community Professional ,
Oct 16, 2017

Copy link to clipboard

Copied

So I took a screenshot of your screenshot and as I suspected there are very few contrast and color differences in your footage for Rotobrush to work with. I didn't get the entire frame but when I tried to mask out the left leg there was so much of the image selected using the default Rotobrush settings that I could tell that Rotobrush would have a very hard time finding edges. The solution is to do some color correcting before you try and use Rotobrush. My first choice was to add Black and White and really jack the values around. It became much easier to cut out the left leg. When you have the roto completed, propagated and frozen, then you can turn off the color correction or just delete it. I hope this helps.

Screen Shot 2017-10-16 at 8.00.03 AM.png

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Oct 16, 2017 0
Community Beginner ,
Oct 20, 2017

Copy link to clipboard

Copied

Thank you both for help. I realized now, that I can't use Rotobrush if I open video in AE as "replace with AE composition" from Premiere Pro. But if I import video in AE then I can use it.

And thank you Rick, I do it your way, and it works. Thank you.

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Oct 20, 2017 1
New Here ,
Jan 12, 2020

Copy link to clipboard

Copied

do you mean it's better to render the clip from Premiere Pro and then import in to AE?

 

When I replace video with AE composition in PP, use the Rotor brush toll and then quit out, an error witht the clip happends and goes red screen in view finder. Any ideas why?

 

Could it be an issue where I'm using a fps clip in a 24fps timeline?

 

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Jan 12, 2020 0
New Here ,
Jul 28, 2020

Copy link to clipboard

Copied

Not working, Would you explain it how you did it?

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Jul 28, 2020 0
RC. LATEST
New Here ,
Aug 09, 2020

Copy link to clipboard

Copied

I had the same exact issue. Just change the comp framerate to the actual framerate of the source clip and you be able to roto your subject.

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Aug 09, 2020 0
New Here ,
Jun 05, 2018

Copy link to clipboard

Copied

worthless again

Likes

Translate

Translate

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Reply
Loading...
Jun 05, 2018 1