I made a collage from a few different video files as below.
As you can see, the white turntable/shades are still visible and I want to make that the same color as the (greyish) background. The problem is that the objects in the video move which makes it a lot harder to do so. I can do this manually by using masks but that would take a lot of time. I tried using tracking masks but doesn't work out well. Would you know a way to remove these white artefacts (semi)automatically?
That makes sense. I suppose I had imagined doing a bit of masking on the objects. If you had a clean plate of the background you could try a difference key. Also, if you have after effects you can try auto rotoscope, but other than that I guess there isn't much to be done outside of some manual masking and blending etc.
I tried rotoscope in AE, though it turns out it has too much difficulty with telling the difference between the background and the white parts (same problem as with keying); I had to adjust every single frame. I decided to reshoot the footage in different lighting, that seems the fastest approach for now. Thanks for your suggestions!