Fjord, about your first question David is absolutely correct. The video simply has to be delayed. Otherwise Deshaker won't be able to access the future frames.
As for your second question, you are correct. It should say 1000, but due to a rounding error it says 999. I'll fix it in the next release. I doubt many people will be able to detect a 1ms out of sync, though. (Btw, 29.97 will actually give you 1001ms, not 999.)
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