I have recently purchased Mocha Pro and have been looking at the videos, manual as well as experimenting and I have some basic questions that I can’t seem to figure out and was wondering if anyone can help me out.
My questions below are based on the following scenario involves which involves Rotoscoping and the clip itself is a person dancing with the background which is perfectly still since the camera was placed on a tripod throughout the whole clip. I have read that it is easier if your track the object prior to doing the actual spline for the profile in order to help reduce the amount of keyframes to do the actual spline throughout the clip. I also read that it may be easier to break up the object [the person in my case] into sections.
So lets say I work on a leg. My first layer, call it “left leg track” is a loose spline which the leg stays in throughout the clip, achieved with a few keyframes here and there. After a sucessful track I click on the cog to remove it so I don’t accidently overwrite the track. All good so far.
I then create my spline of the leg, call it “left leg spline” and say I start this at frame one. Lets also say the spline has only 8 control points. After this spline is complete I then link this layer to the “left leg track” layer. And now for my questions:
Because I linked the layers, I no longer have the option to track my left leg spline layer. This means that although the spline is tracked the changes to the spline due to motion are not. An example would be the foot turning 90 degrees where the start you see the profile of the foot and the end the toes are facing forward so the profile “disapears” I expected Mocha Pro to be able to track this as well but since the cog is not an option I cannot tell Mocha to do track the spline [on top of the track it is linked to] This means I have to keyframe all of these types of changes. Is this correct? Am I missing something?
My next question is how Mocha Pro handles the “Points” that make up the spline. So I have 8 points around the leg and foot. Lets say Pt 1 is at the calf, pt 2 is at the heel, pt 3 is the big toe and pt 4 is at the little toe when I set up the spline in frame 1 as described above. Now lets say 10 seconds down the track I creat ea keyframe which contain the same 8 pts that I will modified in frame one. When I adjust the points let say pt 1 which was the calf I move down to the heel, pt 2 which was the heel I move to the arch of the foot and pts 3 and 4 stay the same. Does Mocha Pro react differently because it sees each pt and follows it throught the clip or are the point just tools for the spline and Mocha only works with the mathmatics of the spline alone?
My last question, Since my background is completely stationary, is there a way to remove it completely? I understand if the background were moving as well this could be very complicated but since it is not and it already knows how to remove the person can’t I just remove the background for this specific scenario? Either way, what is the best way to do this?
Sorry so long and I appreciate any feedback to help out. Thank you all in advance.