Skip to main content
51R
51R
Participant
August 31, 2021
Question

Rotobrush doesnt work, every frame I move forward the selection shrinks

  • August 31, 2021
  • 2 replies
  • 158 views

Screenshots attached!
Was using the rotobrush 2.0 on other production footage and I went crazy, then I convinced myself it is the footage...
Then I got to the Tutorial of "School of Motion" https://www.youtube.com/watch?v=4unfoN_FLJw and downloaded their footage, using BallRoto and I still get the same issue...
the selection shrinks every frame, until there is no selection anymore...??
It worked perfectly in other projects few weeks ago, so I really dont know whats on there?

I deinstalled and reinstalled the latest version! Resetted the preferences a few times, looked at that the framerates matches...
My setup should work fine:
64gb ram
1920xtheardripper
with a rtx3080 Nvidia driver 462.59

I really dont know what I need to do to solve the issue
Please any help

This topic has been closed for replies.

2 replies

Mylenium
Mylenium
Legend
September 1, 2021

I agree with Rick. It's probably a combination of odd parallax with the AI-algorithms in RB 2 not working well together. Wouldn't explain the same issues on other footage, though, so it may be worth checking caches and whether the tools can actualyl connect online to update the analysis database.

 

Mylenium

R
Community Expert
Rick GerardCommunity Expert
Community Expert
September 1, 2021

Check your GPU settings for the Project Panel. Try using Version 1.0 before you propagate. Try adding some color correction and pre-composing before you try Rotobrush. It may help hold the edges.

 

Potential problems: The footage is MP4 and that's not a production format. The tutorial is only moderately adequate and the workflow is amateurish in some parts. 

 

Personally, I would use Mocha AE to create the mask and probably even corner-pin stabilize that shot. I think you could get better results in less time with that footage. 

 

 

Terms & ConditionsAccessibility statement
Using the community Terms of use Privacy Cookie preferences Do not sell or share my personal information ad choicesAdChoices