Video with masked objects that need shadows I have created simple shadow objects for stills in the past where I masked out the environment around product photographs and the shadows matched fine, using the blam add on. Now I am trying to create shadow objects for a video, but the shadow objects don't match the masked objects for more than a couple frames. The solve error for the tracking is 0.14. Shouldn't objects in the virtual environment match the video almost perfectly?
They should, but there are so many factors to take into consideration, it's not a good idea to rely on only one shot. If you can pinpoint where the camera is changing, make a different scene or use a different camera for those clips and lace them together in compositing, or simply do your best with moving the shadow plane around to match where it should be going, and see if it's good enough for your purposes.