ROTO BRUSH TOOL doesn't work

[Coffeebarrel]

Ive loI've looked at the other posts about this and I've tried everything re-installing reseting everything and this video seems to have enough contrast. Idk if im doing something wrong cause im new to after effects or if its just something on my end.

[Coffeebarrel]

same thing has happened to much more colorful and contrasty footage

[Rick Gerard · Accepted solution]

The footage's frame rate does not match the composition's frame rate. Try Pre-composing the trimmed footage layer and make sure that Move All Attributes and Trim Comp have been selected before you try to use Rotobrush. It is always a good idea to do that before using Rotobrush, Tracking a camera, Warp Stabilizing, AE's Feature Trackers, or using Boris FX/Mocha AE.

You may also want to try matching the composition frame rate to the footage frame rate by checking the interpretation in the Project Panel.

[Coffeebarrel]

Thanks

[G0DLYGAM3R PROD. YT]

How do you check the footage's framerate?