I’ve been playing with motion tracking in 2.6 for a few weeks now. I know how to do it for single videos, but was curious if it’s possible to camera track multiple videos and add them one after another. For example, if I filmed two videos and converted each to a png sequence, I first wanna load the first video then motion track it and add some 3D to it. Then maybe add a black screen or image or something else, followed by the second video which I also motion-track and add some 3D to.
I have two issues here. One is that the Background Images feature (when you press n in the 3D view) which is used to show the video after you solve camera motion cannot be keyframed and animated, and it shows the same video globally. I looked for a way to set each camera’s background individually, but it doesn’t work. Supposedly selecting the camera and adding a texture to it should act as a background. Only way seems creating a plane and parenting it in front of the camera, but then I can’t adjust it to be the exact video’s size, as if it’s not scaled exactly the tracks will not match the correct spots.
The second issue is that I’m confused whether or not the camera tracking system supports multiple videos. After I solve camera motion from a video, it sets up a tracking scene in the 3D view. But if I would load another video and track that as well, would Blender know to set up an entirely new tracking scene with another camera containing a new set of tracking points?
I could merge my videos together and track the whole thing, but that would make things very hard if I want to add something between the two which I can easily edit (like some non-tracked 3D). Also, the part at the end and the part at the beginning might not solve well with the same camera settings, as the two clips could be from different areas and angles. On the other side, if I track and 3D-fy each video in its own blend file, there’s no way to export everything in a single render at once. I’d probably need to render each animation then merge the resulting video files in a separate blend, which could cause me to lose quality and make the process more complex.
So a way to fix this would be helpful, if anyone knows any. If not I’ll probably go with separate animations. Perhaps linking / appending blend files together could do the trick.