Warn about source resolution not matching the comp before analyzing with 3D Camera Tracker

We've all been there, done a 3d camera track and waiting for all 300 frames to analyze only to be reminded we need to precomp it because our source resolution doesn't match the comp resolution. Why can't that warning happen BEFORE we sit through all the analysis, like when the effect is initially put on the layer?

[Original Title: Don't tell me my resolution is wrong AFTER analyzing every frame of a video with 3d camera tracker]