Rotobrush Not Working

1. ROTO BRUSH TOOL doesn't work - Adobe Community - 9448996More results from community.adobe.comHello, 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? See details › 2. Roto Brush Not Working - Adobe After Effects - Creative COWMore results from creativecow.netActivity › Forums › Adobe After Effects › Roto Brush Not Working See details › 3. Re: Roto Brush 2.0 rendering/freezing problems — h... - Adobe CommunityMay 21, 2021 · Hi, yes it seems the issue was fixed by transcoding to ProRes 444 from H.264! Thanks for your suggestion.Transcode your stock footage into a different file format would suggest ProRes 444 on a Mac, use all the same frame rates and pixel resolutions in Media Encoder as the original file. Once that has rendered out replace the footage with the new file y...