Mocha_RotoScoping_Actor_Asset_Planar_Track

[Cassius Marques]

Well I’m having a hard time figuring out where you’re stuck. But from the description, I would rotoscope the actor within AE with its roto brush tool (have you tried that?). Then track the feature to be replaced.

[Simon Faris]

Thanks for the reply Cassius. I have not tried that method. I will watch some video on that tool and see if that will do it. For clarity.

I want to place a sign on a wall between the actor and the background which is all on one track. Not Green Screen.
Think: Actor walking in front of a building-
Me- To add a sign on that building, then the actor walks by (in front) sign posted on the building.

When the actor walks in front of the sign (or supposed to) the actor appears to walk behind the sign. Cutting off his upper body when passing it. Due to 2d and not 3d.

I am looking for a fix to it if there is one? I tried as mentioned above, not even sure that will get it done, due to 2d and not having the actor separate from the Back Ground?

S.Faris
https://www.NetCommercial.Net

[Cassius Marques]

The roto brush tool does exactly that. Though I wouldn’t call it “a fix” because there’s a lot of manual adjustments to be done when using that tool. And it ain’t begginers friendly. You should see some tutorials on it and try it out. There’s no other way to do what you want but to manually mask the actor out(roto tool in this case will assist you with that)

[Simon Faris]

Thanks for that. Glad to know I am in the right direction and it is doable. Was not sure.
I Will take a close look at it and see how RotoScoping works. The good stuff always needs to be done by hand usually, anyways. In some form or fashion.
I was not getting a good mask in AEMocha as the two masks were conflicting with one another..I was thinking about it today, if I could mask out my actor. Then lay what I want on that background then mask him back on a top on his own layer, I should be able to get what I wanted.
Regards,
NC

S.Faris
https://www.NetCommercial.Net

[Roland R. kahlenberg]

You should track the talent first. Then use it as a Subtract Matte when tracking the windows. Ensure that the Subtract Matte sits at the very top of mocha’s Layer Controls Panel and that its Process switch is set to off – to prevent a second round of tracking for the Subtract Matte layer.

This should work well unless the windows are largely occluded by the talent. Then it’s a case of looking at Offset Tracking a co-planar area or even manual tracking for those frames where mocha is not able to obtain sufficient planar data.

HTH
RoRK

Intensive mocha & AE Training in Singapore and Other Dangerous Locations

Imagineer Systems (mocha) Certified Instructor
& Adobe After Effects CS6 ACE

[Simon Faris]

Thank you Roland,
I will try that. I keep getting my track kicked halfway through it. My talent does not walk direct in front of it, but does skim by it. I will search around for the proper steps to do a Subtract Matte. My track loss comes from a bump in the video, to a pan. My mask gets kicked in mocha at that point.
SF

S.Faris
https://www.NetCommercial.Net

[Roland R. kahlenberg]

Take a look at tis tutorial – https://vimeo.com/8057500. Terms such as Subtract Matte, Holdout Matte and in this case, Foreground Obstructions are used interchangeably – keep this in mind should you want to search for other relevant turorials.

HTH
RoRK

Intensive mocha & AE Training in Singapore and Other Dangerous Locations

Imagineer Systems (mocha) Certified Instructor
& Adobe After Effects CS6 ACE

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[Simon Faris]

Roland,
Excellent, Very helpful detailed video. One of the better ones thus far, I have watched at least 6 of these by now and pick up something different in each one. Appreciate the direct link. Nothing better then an example over an explanation via type.
Regards
SF

S.Faris
https://www.NetCommercial.Net

[Simon Faris]

So I have been working on this for a week now… I am not having any luck. I have used a subtract matte, making sure it is locked and the gear Icon off as to not re-track. The subtract matte is also atop of the layer stack to ensure Mocha realizes it is foreground.

I have tried to crank up the smoothing, get my head around the track tools below. With Master track and add. NO luck. I tried to manually track but I cannot figure on how to keep my matte to stay put. It is as though the matte is tied to the camera lens instead of the building. I have moved the matte to different places and all sorts of deviations. However once the camera does a pan as the actor walks the matte follows it. That is with the actor matted out as described above.

I am so frustrated with this track it is driving me nuts. I watched an imagineer tutorial showing a “post” in the foreground and the instructor manually keyframing it.
When I try to manually KF it the Matte is un moveable… as a whole. I was going to try to move it a frame forward and reset matte, repeat. But I cannot move the matte it just stays off track. OR I can only move one vertice or spline position at a time, creating even more of a fiasco.

S.Faris
https://www.NetCommercial.Net

[Roland R. kahlenberg]

It’s best that you post screen caps of the following –

1) Layer Controls Panel

2) Tracking spline (for us to appreciate how you’ve drawn tracking spline)

3) Planar Surface to depict the Corner Pin (points) that you intend to export via the Tracking Spline (in 2, above)

4)A frame where the foreground object/person begins to intrude into the Tracking Spline (in 2, above)

5) THE frame where the foreground object/person intrudes THE MOST into the Tracking Spline (in 2, above)

Of course post the entire clip, as an additional, if you can.

Cheers
RoRK

Intensive mocha & AE Training in Singapore and Other Dangerous Locations

Imagineer Systems (mocha) Certified Instructor
& Adobe After Effects CS6 ACE