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Rotobrush 2.0 continues to slow down and hang during timeline rendering.

Advocate ,
Jul 17, 2021 Jul 17, 2021

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Credit for the fix goes to:  Jordan Clay

 

If you want to avoid reading all the posts, the answer is quite simple:

Simply install After Effects version 18.1  and your rotobrush will work fine as is did in the past.

The new updates after 18.1 are problematic and have bugs regarding rotobrush 2.0 and propagation.

BTW, the installation is super easy, just go to your Cloud and click the 3 little dots by After Effects.... then 'different versions' then install it.  All your settings will be there pre installed, not worries. 

Just ignore future updates and do not install any new AE updates until Adobe can fix the problem, which, after contacting the Adobe techs all I get is: "this is all news to us, surely the problem must be on your end" is the catch phrase they are using.  Funny, 18.1 works perfectly, the only thing changed was the 'update.'

 

(rendering or propagating, not sure of the term)  After rotobrushing the new mask, and seeing it in the timeline, and pressing Space Bar to see it in action.

 

After prior posting here, and not finding any answers to this problem with rotobrush 2.0 hanging,

I decided to contact Adobe and see what the masters say about this problem.

 

After trouble shooting, including removing preferences, and changing cuda to 'software only' the tech at Adobe was stumped.

 

Of course they were stumped, because it seems that I am the only one in the world with this problem.  The tech had no prior experience nor info about this problem on file.  I asked for a 2nd tech, and was refused. 

 

All the hundreds of people with this problem have either fixed it themselves OR never reported it, as again, according to Adobe I seem to be the only with this problem.

 

Adobe's Solution:

"We will look into the matter and send you an email"  

 

(taking a big breath here) aaaaaaaaaaaaHHHH 

Followed by:    ahahahahahahhahahahahhahah

 

Yeah right.  That is how Adobe brushes off their customers when they can't fix a problem.

..the old "we'll send you an email."  If I had a dollar for everytime I was told that, I'd be up a cool C note.

 

In the mean time, I'm paying $$$$ for this software that doesn't work.

 

The Rotobrush 2.0 is a crock.  It's full of bugs and simple won't render a scene as complicated as a shelf with bottles in the background.

 

IF ANYBODY READING THIS CAN HELP, PLEASE STEP UP TO THE PLATE.

 

All I'm doing is RBing a simple face in front of a shelf full of bottles.   The face moves and camera pans with him, not alot, but enough that it's too much to pen tool it, plus I've got 5 clips of this I have to fix.  Yes, its a busy background, but then why does the brush rendering work for the first few seconds then get slower, and slower, to an eventual hang????  

 

It should work, or not work at all, not this teasing madness.

 

My work around of doing a few seconds at a time is turning into a nightmare.  I need this software to work. 

 

Please somebody out there help me.  Adobe CAN'T FIX THIS, MAYBE YOU CAN.

 

my system:  32GB, Ryzen 7, gtx1050ti solid state drives. 

The roto2.0 does work with simple images and simple backgrounds, just not a shelf with bottles in the background.

Insane?  Yes.

 

Is this image really too difficult for rotobrush?? PLEASE HELP!!!  Thank you!!! Letty

FHLP Linked Comp 587 (0-00-03-11) copy.jpg

 

TOPICS
Error or problem, FAQ, Freeze or hang, How to, Performance

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correct answers 2 Correct answers

Adobe Community Professional , Jul 18, 2021 Jul 18, 2021
Rotobrush slows down because of the lack of system resources. If previous versions work better on your machine than the latest build it means that the system requirements have changed. Without some massive color correction that image is going to be difficult for any automated masking tool to work with. Even with some serious color correction optimized for Rotobrush, these shots are going to require a lot of work and take a lot of time. I would start by doing some tweaking on the colors to inc...

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Adobe Community Professional , Jul 18, 2021 Jul 18, 2021
There is nothing preventing you from splitting the layers and running Rotobrush on 2 or 3-second segments of your clip.  When you have all the pieces frozen, pre-compose the group and use that pre-comp for a track matte for the original footage.  Any time I spend more than about four or five minutes on a Rotobrush layer I always pre-compose the layer after Rotobrush is frozen, go to the Composition/Prerender menu to render and replace the comp in AE with a MOVIE. The default settings for PreRe...

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Advocate ,
Jul 17, 2021 Jul 17, 2021

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UPDATE:

I tried again to render it out, and this time, instead of rendering, I clicked on Freeze to lock it in.

 

It propagated the same as a timeline render, it started off normal, then started getting slower and slower..... 

then it got so slow, I thought it hanged again.... but I waited it out...  it took 6 minutes per frame, and the last 7 frames took about 30 mins to freeze.

 

OK, so the issue is why?  

 

After it was frozen, I was able to play it on the timeline no problems.

 

So what is causing the slow down?  Is this a  GPU issue?  GTX1050ti has 4gb ram.  Is it running out of ram ?  Clips are 1080p.   

I have the latest drivers and cuda drivers.

 

My brain can only take so much.

Thanks for your advice.

Letty

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Advocate ,
Jul 18, 2021 Jul 18, 2021

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chirp.... chirp....

 

(sounds of crickets)

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Adobe Community Professional ,
Jul 18, 2021 Jul 18, 2021

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Rotobrush slows down because of the lack of system resources. If previous versions work better on your machine than the latest build it means that the system requirements have changed.

 

Without some massive color correction that image is going to be difficult for any automated masking tool to work with. Even with some serious color correction optimized for Rotobrush, these shots are going to require a lot of work and take a lot of time.

Original.png

I would start by doing some tweaking on the colors to increase the differences in the luminance levels. You are not trying to go for a pleasing color, you are trying to make the actor different than the background.

CC for Roto.png

Then Pre-compose the layer and apply Rotobrush to the pre-comp. It took a couple of tries on the color correction but I finally got this result on this frame by using a total of 12 strokes. A shot that was better planned and better shot might have only taken 3 or 4.

Rotobrush.png

The last step is to use the pre-comp as an alpha track matte for the original footage and then do some serious color correction on the footage. The original footage is underexposed by about a little more than 2 stops. I got a fairly good result with your shot in about six minutes.

Final.png

If the shot has a lot of movement and there is a fair amount of motion blur and is 8 seconds long I could see easily spending forty-five minutes to an hour on the shot. I could probably roto the shot by hand in about the same amount of time.

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Advocate ,
Jul 18, 2021 Jul 18, 2021

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Thanks Rick!  Always great info.

 

I was able tweak the color prior to the rotobrush and got a pretty good mask.

 

Problem remains of propagating the mask.  

You mentioned 'Rotobrush slows down because of the lack of system resources. '   is there something I can do to fix this?

The propagation when I click space bar starts off great, then slower, then really slow, then 1 frame per 5 minutes at the end.

The clip is only about 8 seconds. The computer acts like it's running out of breath.

 

When I do the propagation, I checked my computer's Task Manager / Performance and the cpu and gpu were really low, nothing maxed out at all, nor near it.  Just crawling along at very low levels.

 

I don't get why the propagation gets slower and slower to the point of hanging when my Performance is really low and not being used at all?

 

Do I really have to buy a new $1000000 gpu ?  I'm using gtx1050ti.

 

Thanks again for your advice,

Letty

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Advocate ,
Jul 18, 2021 Jul 18, 2021

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I just installed AE version 18.1  and the rotobrush works like a charm!!!!

 

So you are right about your statement:

 

Rotobrush slows down because of the lack of system resources. If previous versions work better on your machine than the latest build it means that the system requirements have changed.

 

In other post I did about this issue ther poster said to install 18.1  but I was hesitate because I like working in the latest version.

 

Anyways, I'm off the ledge again.

 

I guess I'm stuck in 18.1 forever....  you think a my problem was an old gpu??  gtx1050ti  no longer works with the latest AE verion?

 

Thanks for your reply,

Letty

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Adobe Community Professional ,
Jul 18, 2021 Jul 18, 2021

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There is nothing preventing you from splitting the layers and running Rotobrush on 2 or 3-second segments of your clip.  When you have all the pieces frozen, pre-compose the group and use that pre-comp for a track matte for the original footage. 

 

Any time I spend more than about four or five minutes on a Rotobrush layer I always pre-compose the layer after Rotobrush is frozen, go to the Composition/Prerender menu to render and replace the comp in AE with a MOVIE. The default settings for PreRendder are lossless with alpha and import and replace as a post-render action. 

 

I almost never use a rotobrush layer with the effect applied in my main composition. There is just too much chance for a render failure. Rotobrush also seriously bloats your AEP file size and can slow everything down. Rotobrush is a very good tool for creating a matte. Be safe. Render the matte and get rid of the Rotobrush when you are done with it.

 

This workflow goes back to the early days of rotoscoping. Once the roto was complete and working well and approved all professionals rendered the matte, even clear back to the days of doing it on film, and archived or just got rid of the original roto work.

 

 

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Advocate ,
Jul 19, 2021 Jul 19, 2021

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You are so much more helpful than any of the Adobe online tech support people I've ever live chatted with.

 

Everytime I take a problem to Adobe, I have to jump thru "trial and error" hoops, and lots of meaningless guess work. I've wasted so much time there, I can only blame myself.

 

Thanks again for your solid avice and words of wisdom.

 

I'm using version AE 18.1 from now on, and can only hope the Adobe creators can fix the rotobrush bug in their latest updates.  So far, the techs at adobe are giving me work arounds that don't work and a list of steps to do everytime I want to propagate a rotobrush'd mask (literally 6 steps before and after each render attempt, that didn't work)   I have a feeling they are not interested in fixing the problem.  Obviously, there is a problem because 18.1 works perfectly, while the latest update does not.  (I still think it's on purpose, to get users to buy new gpu's as they phase out older ones, but we'll never know)

 

Thanks again,

Letty

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New Here ,
Jul 21, 2021 Jul 21, 2021

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Thank You!!! By reverting to 18.1 all of my Rotobrush woes have been fixed! I tried so many different solutions before finding this. You have literally saved my project! Not sure what the Adobe team changed from 18.1+ ,but whatever the issue is I hope they get it fixed in a future update. I have seen so many posts with people reporting the same issue. Until the bug is fixed I will be in 18.1!

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New Here ,
Jul 26, 2021 Jul 26, 2021

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Thanks!! The problem is not our machines, it is the update of the ae, I have a complex rotoscope of 15sg and in second 2, it got slow and slow until it did not advance, I almost cried. But looking for solutions I found it. Thanks and friends at Adobe, please be careful with these details.

I was working on version 18.4 and I changed to 18.1

cheers

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New Here ,
Jul 29, 2021 Jul 29, 2021

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This was definitely the key I want sure my new surface pro want working. I thought it was solid state memory I took to my desktop. Got v plenty of team still could only get like a second of frames did it 8 different times. I ended up going frame but frame to around the same point thanks for posting solution. Adobe would've had me ready to snap🥴

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