Motion track track point moving out of picture

I open a door, and inside I want to put a image. When opening the door I want the image inside to reveal as I open the door. I tried to motion track the door opening so I could get the mask to follow the edge of the door. Unfortunately the door moves out of the picture, leaving the motion tracking insufficient. I tried moving the mask manually, but that didn't work at all. The mask couldn't follow the movement of the door. Also the door is white, so I don't have much contrast to point the tracker on.

Any suggestions?

Is this opening door an object you animated, or a video clip of a door opening?

It's a video clip.

Can you post the clip, Neguah? A look might help.

You could probably put the stuff you want to reveal as a connected clip on top and then crop it and keyframe the crop? Or for more control apply a four or eight point mask?

Even better: next time just put some green cloth behind the door that you can then key out easily in FCPX!

Good luck

Both clips are uploading as I'm writing. This is a film for work(kindergarten). I want to put a person inside a heating cabinet. I filmed the person I wanted to put inside in front of a blue wall. I put the clip inside the cabinet, keyed it and made the clip with the person inside and the clip with no person inside as a compound clip. The problem with keyframing the crop is that it won't stick to the movement of the edge of the door. It's all wobbling.

As for the waving girl, I'm going to put her in the ocean. Just need to find some of my summer clips...

Upload complete:

vimeo.com/113648165
vimeo.com/113647578

Password: Hide

OK, I'd take a green or blue sheet and tack it up inside that closet, again the back wall, or half way back. Then re-film it. Chromo-key it.

That's going to be a TON of keyframing work. Keyframe every half second. Then keyframe in between that. Then in-between those, until you get it right. Man, that's going to be tough to do keyframes.

Neguah wrote: I open a door, and inside I want to put a image. When opening the door I want the image inside to reveal as I open the door. … 

maybe I'm missing your point but ... :

• green-screen (my rough source needs a 8point-dirt-mask ... ) + keying
• adding the Gradient-Mask
• key-framing position of Gradient mask ...

the movement of the door is so fast, and so blurred, I don't see the need of a nano-inch-precision ... :woohoo:

or, do you want to apply the graphic on the door?

besides: What is MY son doing in YOUR closet?? :lol: :lol:

Many thanks for you advice, Ben and Karsten!

Filming again is not an option for different reasons, so I'll just have to work with what I've got.
I can try doing it again, without the nano-inch-precision

Graphic on the door?
I tried tracking the motion of the door in Motion. But the tracker wouldn't stick to the door. And doing it manually...well, that was impossible. At least I don't know how. I tried, but it was difficult.

Hehe, well, your son helped me out

Neguah wrote: .... But the tracker wouldn't stick to the door. And doing it manually...well, that was impossible. ...

Well, my example, is just two keyframes, start/end.
The movement of the door is so fast, no 'tracking' needed, the inside is shown with farmes..

The problem for the tracker is the blurriness of you recording.-
.. which is, for masking it with the Gradient Mask, an advantage!
(you've seen my attached screenshot, nto the yt.video only?)

Karsten Schlüter wrote:
Well, my example, is just two keyframes, start/end.
The movement of the door is so fast, no 'tracking' needed, the inside is shown with farmes..

The problem for the tracker is the blurriness of you recording.-
.. which is, for masking it with the Gradient Mask, an advantage!
(you've seen my attached screenshot, nto the yt.video only?)

Ahh, I get it.. no I didn't see your attached screenshot. Was checking on my phone. But can see it now. Will for sure do that. It doesn't have to be perfect, it's only for the kids and their parents. The problem is, I care I better plan the shot better next time

Have another one:

vimeo.com/113739614

I want to stick my text to the tree on the left side and just disappear when I move the camera. I'm sticking the motion tracker to the text on the white wall on the left side. When the guy closing up on the tracker I stop, click "offset track" and then move the motion tracker to another point. But when the guy are passing the tracker on the text on the white wall the whole thing just stops.

How do I do that?

Neguah wrote: Have another one:… How do I do that?

like that?



In this case a no-brainer: Don't track the tree, but something near-by!
See my attached screen-shot

It's all about finding the right spot to track... That will work for me.

Feeling so dumb... thank you very much!

Neguah wrote: … Feeling so dumb... thank you very much!

You're welcome…
Some solutions are TOO obvious .......