roto brush looses its render as it renders

Question

So - I'm new to the roto brush and am having an issue. As my 20 second clup renders, the render behind the playhead gets lost - meaning at say the 10 second mark, everything the green line behind will disappear. This continues to happen as the playhead moves on.

Any sugestions as to what could be casuing this?

patrickh27764550 · Accepted Answer

OK, after more investigation and more learning, I don't think it was being lost, it was just no longer cached.  When I froze it it froze properly. Thanks for the response.

norsmarsh · Answer

I have similar problem and that my render only keeps the render for four seconds as the green line moves on four seconds behind disappears. I can render and freeze a four second clip but I can't render/freeze anything longer than that. I thought maybe it had to do with the memory of my cache but it doesn't seem to be the case. I have a feeling it's something to do with memory but I can't figure it out.

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