"after effects warning: Error reading past end of file" while rotoscoping

I have the exact same problem in pr and ae for my roto video as described by @JohnnyRocket, and here is how i solved it.

step 1: remove empty frames at start and at end of your roto composition (as subtly mentioned by @Rick Gerard)

step 2: unfreeze then freeze the video (as mentioned by @laucov)

simply doing step 2 does not work for me, both doing both 1 and 2 solves both "Error reading past end of file" in ae and "accelerated renderer error" in pr.

hope it helps!

When I use Rotobrush, I always pre-compose the trimmed footage layer, moving all attributes to the new comp and trimming the comp to the layer length. Then, the pre-comp, the now nested comp, is opened in the Layer Panel, and Rotobrush is applied. This keeps the extra frames at the head and tail of the shot from showing up in the Layer panel. If Rotobrush takes more than a couple of minutes to complete, I always pre-compose the Rotobrtushed comp again, open the comp, and then choose Composition/Pre-render to replace the Rotobrushed comp with rendered footage in the Project. When the file has been rendered, I delete the Rotobrushed comp to reduce the AEP file size and improve AE's stability. Pre-rendering also reduces the final render time of the comp. In some cases, the final render time is reduced by more time than it took to render the Rotoed footage.

3 years later and this is still an annoying, unexplainable issue. Using 2024 with Roto Brush 3.0 and this error has constantly killed my workflow on many projects. 

Hi @JohnnyRocket ,

This type of behavior usually occurs if there was some sort of crash.

Attempt a render from After Effects.

If that is successful, replace the footage on the Pr timeline.

Let us know how you go

mj