[johnmeyer]

I think Sven's amazing post shows clearly that there is no correlation between the sync pulses you have captured, and the artifacts you are trying to remove. The easy conclusion is that they are caused by something other than time base errors. However, another conclusion is that you have not really "captured" time base information (or at least have not captured it correctly) with your modified driver.

I do not say this in order to be difficult, but at the risk of sounding like I only have one thing to offer, I would once again like to suggest trying to borrow a real hardware TBC and use it. I say this because the visual disturbance you are trying to correct is something I have seen many times, and a TBC circuit has, for me, always been able to remove the line displacements.