Questions tagged [tracking]

Questions about Blender's 3D motion or object tracking system. Object tracking is accessed via the Movie Clip Editor.

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1answer
74 views

motion tracking : How to apply lens distortion value from one clip to another?

I tried to track a distorted clip using motion tracker. I already determined the distortion value K1,K2 using a reference grid. Now I need to apply this distortion value to other clip. How can I do ...
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0answers
441 views

Motion tracking : How to solve camera using lens distorted footage

What is the best workflow to solve camera track using footage that has lens distortion ? do i have to undistort the clip first using external app ? or can Blender do the undistortion using its ...
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1answer
72 views

Trackers in re-linked footage don't match the features on video

I've managed to get my footage re-linked to my project again after reformatting my PC, but I've noticed that all of my trackers keep moving around. Is there any way to fix this, or have I got to ...
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1answer
81 views

How do you restore previously tracked footage?

I've recently reformatted my PC, and once I reinstalled and loaded my Blender file back up, the trackers were still there, but the footage wasn't. I tried to reload the sequence back up, but now that ...
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125 views

How can I fix my video tracking?

I'm still learning how to do video tracking and getting my character to walk within a video scene. I'm having a few problems that are giving me mixed results. For one, whenever I select three of my ...
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1answer
2k views

What's wrong with the prefetching?

I'm currently messing around with camera tracking and I've noticed a strange issue. Whenever I prefetch the footage, it works, but from frame 129-160, the blue line isn't there. On playback, once the ...
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1answer
561 views

blender api - get current location and rotation of camera tracking an object

I have a camera with an object constraint to track an empty plain axes. I want to get the camera's current rotation, since when the axes move, or when the camera changes location, the camera rotates ...
2
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1answer
246 views

Camera tracking reference scene to match different shots in a common space

Is there a way to create a 'reference' scene for use in solving other shots? So method would be: Set scene with 8 markers (e.g. orange table tennis balls) Take master wide shot with slow track (then ...
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1answer
202 views

How to track a point with axis

I want an object's axis always to face an empty while subject to a clamp constrain. Any suggestions on how to do that?
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0answers
36 views

How to constrain vertices of an object to tracked point

I have a video where I'm moving my fingers around (4 points) and what I want to achieve is having an object whose vertices I want to move using my fingers. I already set up the tracking of the points ...
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60 views

Tracking camera movement using built-in accelerometer

Are there any apps that allow recording smartphone motion while shooting in order to move camera without point tracking? And then, how to link this data to camera in scene?
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57 views

tracking a simple camera movement

I'm new to Blender and am trying to track a very simple camera movement : I'm moving my camera from down to up, along a straight line. I'm using a DJI Osmo camera, so that I get a stabilized image. ...
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48 views

weird camera path with good marker tracking solve error

I have a drone footage taken with Phantom 3 Pro and I want to solve the camera path. The markers are fairly stable with a solve error less than 1. Still the camera path is pretty much crazy. I used ...
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1answer
462 views

“track to” object under “parent” constraint

I work on this project for which we have a robot arm (6 servos), a camera attached to its extremity which tracks a physical object, and we wish to set up the experiment in Blender. We used an armature ...
6
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1answer
295 views

Shadow catcher casts light (?) on the floor

I'm using Cycles render to render footage with camera tracking and video in the background. I had marked "Shadow Catcher" under Ray Visibility in Cycles Settings in "Rendered" viewport view (SHIFT + Z)...
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1answer
27 views

Video with masked objects that need shadows [duplicate]

I have created simple shadow objects for stills in the past where I masked out the environment around product photographs and the shadows matched fine, using the blam add on. Now I am trying to create ...
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1answer
222 views

How to keep camera always in horizontal position?

The camera is following the path from top to the bottom, orbiting around the wires. I would like it to be focused all the time on the wires in horizontal position. Is there a way to exclude Z axis ...
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1answer
420 views

People walking through camera tracking

I’ve just started to teach myself about camera tracking in blender. I’ve watched tutorials and everything shows an animated 3D object in the middle of an open space. Can you do and get the same effect ...
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0answers
45 views

How to track such “flat” videos? Flat: Mostly moving camera on a paper plane or so

https://www.youtube.com/watch?v=B-oSc_KRHnw I mean the video in the video. The spider creature and the buildings etc. Would I solve this live-action plate as a Tripod? There is no Parallax ...
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45 views

Blender for VFX [duplicate]

I wanted to know where can I began learning VFX in blender. I know that blender has a great compositing, camera tracking and masking etc. capabilities and I want to know how can I use them effectively ...
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1answer
61 views

Stabilize a video using only one tracking piont

I have a video that I want to stabilize, tho the video itself is very stable the subject is moving. I want to keep the subject in the centre. and there is only one tracking point that is visible in ...
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1answer
346 views

How does real life camera sensor size affect tracking on Blender?

I don't quite understand deeply what the relation of the real life camera sensor in relation the tracking with the virtual camera size. I've always worked with direct aspect ratio (i.e: 1920 x 1080). ...
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1answer
612 views

How to correctly LOCK motion tracking points so they don't move after reloading movie clip?

I was trying to stabilize some movie clip and met quite annoying issue in Blender 2.79b, although I recall this was happening in earlier versions too. The following image shows an example of certain ...
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0answers
29 views

Trasparency is not correct

I am making a short clip of tracking and then making 3d object injected in it. I want to make series of png of 3d object then combining my original footage and that 3d object. The problem is when it ...
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1answer
439 views

How to overlay someone (and his/her movements) in a video clip tracking eyes,face,mouth of a 3d character

I want to replace/overlay the faces and the bodies of the people that are in a video clip with a series of 3d characters of the same size and shape. I set up 8 tracker points for the character's ...
2
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1answer
676 views

Motion tracking. The edges of undistorted footage are cropped, and so are the elements of the 3D scene

I'm working to implement CGI elements to a short film using an Anamorphic Lens. The distortion off these lenses are quite beautiful but I am running into issues with cut-offs after implementing with ...
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0answers
24 views

Set camera constraints as if it were from solver

first of all: I am very new to Blender Python :-). I performed a camera tracking on a video and I have now a camera with a MotionConstraints on it that moves accordingly. I am able to access the ...
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0answers
127 views

3D Tracking an object that follows camera motion

I have a unique scene that I am attempting to solve for motion. It is some aerial footage of a camera following a moving train along a track. The camera is basically flying alongside the train from a ...
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1answer
327 views

Shadow Catcher object causing brightness issues in scene

Okay! Through help on this page I was able to go from this tutorial about camera tracking... https://www.youtube.com/watch?v=CVPcT0dJmoY&t=2121s Redoing the whole thing with Cycles instead of ...
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1answer
322 views

Shadow Catcher, Shadow Rendering Behind Tracked Camera Scene

I asked a question before but I think the problem has changed enough to ask it in a new way. I tracked some footage using the setup tracking scene button, and had issues with the rendering. I ...
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1answer
147 views

How can i make the track to constraint track on x axis using location transformation instead of rotation?

When i move my bone that i assigned to the eyes of my character using track to constraint they will track up and down but only will track side to side when i rotate the bone. is there any way to make ...
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0answers
740 views

Camera Tracking Shadow

I was following this tutorial https://www.youtube.com/watch?v=CVPcT0dJmoY&t=346s which is a bit old but I was able to get it through the camera tracking and to the point of adding 3d objects to ...
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1answer
333 views

FBX file boujou track data lags behind video

I got my FBX track from boujou in blender but I can't seem to get the track to move with my video, I've checked the frame rate and made sure all settings in boujou match blenders. The track is ...
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0answers
35 views

Alingning object to motion tracked scene

I have a scene which I have motion tracked. I'm having trouble adding objects to the scene though. I cant seem to get a cube to line up with the base of the sign. I have the correct size of sensor and ...
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1answer
709 views

Applying FBX file data to 3D camera in blender

So I did a 3D track in Boujou 5 and exported the FBX file, converted it to another version of FBX file so Blender can read it and now I'm stuck here. Apply the camera data to a 3d camera in blender, I ...
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1answer
234 views

Game Engine - Steering Behaviour Understanding

I am working on a BGE Horror Game right now and I want the enemy to follow the player around, but not directly. I want it to also walk around radon parts of the map even when the player is not there. ...
2
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1answer
504 views

How to delete a mask in the movie clip editor?

I can't find find a way to remove masking data in the Movie Clip Editor. How to get rid of it?
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0answers
221 views

Which Algorithm use Blender for Motion Tracking in version 2.79?

We are using Blender for Multimodal Analysis, the Motion Tracking Module is ideal for our Workflow and we are very happy with the options and functionality of the Tracker. In order to describe the ...
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0answers
77 views

Why do my flames look horizontally stretched when rendered?

I have a scene where I want a car to look like it is on fire as I drive by it. When changing to RenderMode, my motion track looks good (enough). It is in the right location and does not move ...
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0answers
123 views

Blender VFX Shadow Catcher Screw up

I have been working on a small short film that has a small section of VFX work, However; when I was rendering a test result to see if everything was working the way it needed to, the render did not ...
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0answers
153 views

Casting shadow without any floor [duplicate]

So I wanted to render a my model in a video scene, and after setting up the tracking scene I can see that in render view, both the model and the floor are visible (along with the shadow casted). What ...
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0answers
37 views

Camera tracking

After tracking, I wanted to import one of my own objects to the scene. Now when I play the animation, as the camera moves the object also keeps on moving. It doesn't stay fixated at one place. How do ...
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2answers
567 views

Solve error too much [duplicate]

this is the first time I have started learning camera tracking. I know there's an easy way to track but I'm doing it the manual way; by placing trackers. After giving all the camera details and stuff, ...
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0answers
157 views

Plane track does not follow marker through duration of frames

I make stop motion animation, and am trying to figure out how to overlay a mouth on a pattern I have for a characters mouth. Everything is working as it should with the compositing, etc, aside from ...
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1answer
42 views

Why does my 3D Object become transparent [closed]

When I click f12 the texture of my 3D object become like this. If I missed something please tell me. I'm newbie at motion track. It'll help a lot thanks :)
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1answer
114 views

Export Premiere Pro Camera Track Data to Blender?

I'm new to Premiere Pro, but I understand that it has a camera tracking capability. Is it possible to extract this data and feed it into Blender, as can be done in After Effects?
3
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1answer
323 views

Shadow Catcher is Lighter than Rest of Scene

In Blender 2.79b, I'm trying to render this motion tracked scene with a simple cube then a plane as a shadow catcher. But when I render it, the shadow catcher is invisible but seems to be brightening ...
2
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1answer
250 views

Tell Blender to ignore tracker for camera solve

I want to have blender ignore some markers during camera tracking. I have drone footage of someone running around on a rooftop and shooting at "things" to be added post. I tracked his gun barrel ...
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1answer
520 views

Tracked background does not show in final render.

I created a camera tracking animation: a dinosaur walking in my street. Everything worked fine until I deleted the video background and added a new one. In render view I can see the result I want: my ...
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0answers
130 views

My object is sliding in video after rendering [duplicate]

So I have been trying to learn how to do motion tracking and I have a good solve error of 0.5507. I thought that after I rendered my object in my video wouldn't experience any irrational moving or ...

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