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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13 views

Trying to upload two images in sequence in movie clip editor but it only adds one and fills all frames. How do I fix this?

Ive done it before and its worked. Trying to set up a tracking scene so I can drop a model into the photo accurately. For some reason it has stoped working and only loads in one of the selected images,...
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27 views

Why don't my tracking markers stay in position?

This is my very first post here. After having used it a few times in the past, I recently started playing around with Blender again. At the moment I'm experimenting with Blender's camera tracking ...
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31 views

Why does my 3d object move around even though I have good motion tracking

I've switched from native Blender motion tracking to using April Tools mentioned in CGMatter's video. This seems to be working really well. However, I have a 3D model of a porsche that is giving me ...
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32 views

Distance points between frames in motion tracking

I am learning how to track points in Blender and was wondering if it is possible to get the distance a point travels when tracking points. Blender shows a line with 'knots in each frame to show its ...
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22 views

Camera and lens settings/preset for iPhone 11 Pro [duplicate]

I've recorded some footage using my iPhone 11 Pro that I want to track. Using Google I found that the primary lens (the one I used) has a focal length of 26 mm. However, I understand that for proper ...
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25 views

How do I make multiple things in the background the “ground and have them as ”shadow catchers" [closed]

I am building a scene with multiple planes in the background because I want to have the multiple planes working as shadow catchers except, when I put them in the background, they don't behave as ...
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1answer
42 views

3D objects in tracker scene slide off position

I have a video footage shot on an iPhone 8, that I want to track and use in Blender (to add objects etc.). I added a couple markers and these track pretty well, I can get a fairly low solve error (...
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19 views

How to mask out a object in motion tracked shot to put people behind things?

I want to put the girl behind the cup. How can i mask the foot of the girl? This is a motion tracked shot that moves so it doesn't just stay still.
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34 views

Prefetch maxing out 20+GB of RAM over a 355MB jpeg sequence

Pretty new to Blender - I'm having difficulty wrapping my head around how Blender caches image sequences. I have a 355MB jpeg sequence which I am trying to Prefetch and do a camera track on. Somehow ...
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23 views

How can I set the camera parameters for 3d motion tracking footage?

I am trying to 3d motion track a scene from my Sony HDR-HC7e Camcorder. I know that he has a 1/2.9" ClearVid CMOS sensor in it but how do I get the horizontal sensor Size? and should I youse the ...
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Motion Tracking issues

I followed a CG matter tutorial for mocap and am having trouble making the results look good and natural. The cube doesn't fully follow the motion. Any help would be appreciated. Tutorial Blend File
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40 views

How to put rotation- and scale invariant labels to three dimensional objects (motion-tracked insert effect)?

I'm looking for an approach to introduce some informational objects to a 3D scene to be rendered. The effect is similar to motion-tracked inserts, you may know from various video productions. It would ...
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I'm getting a distortioned weird effect when ''Setting up the tracking scene'' in my movie clip editor [duplicate]

Whenever I look into my 3d viewport through my camera I see this weird effects, how do I get rid of them? My resolution matches the footage's
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30 views

Camera tracking scene misalignment during animation render

I am using camera tracking in Blender 2.8 to composite some bouncing balls onto a video background. I need the balls to disappear behind an object in the video (a plant), so I have created a second ...
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15 views

texture is fine in the material preview but is purple in the render mode

I was using April tools for tracking but the texture which I was thinking to extract by baking became purple but is fine in the material preview this problem is not there in eevee
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Boujou Tracking - FOV feels wrong

For the past few years, I've been tracking shots from Boujou to Blender, using Blender 2.49B to 2.9 (Thats one of the best, non-bugged ways to transfer tracks). Though, shots like this where the "...
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24 views

3d Camera Tilting when Camera Tracked [duplicate]

I tried to 3d camera track my footage in blender and my solve error was 1.1846 and I didn't think that was that bad. I set the lens to 14mm because that was the lens I was using with my Panasonic g7, ...
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22 views

Image Stretching as result of 3d tracking

When I do a camera track and set up a tracking scene, stretching appears in the image in the compostitor. Why? Also, an "Unsistortion" node has appeared in the compositor making the ...
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35 views

Motion track while knowing distance between points

Is there a way to 3D track points while knowing the distance between them? Example: I track nine points in a grid like this: . . . . . . . . . The distance between ...
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68 views

Portrait Video Camera Tracking shift

is it possible to track the vertical (portrait) video ? (I tried every step I did to Normal Landscape Video format) The solve error is 0.2 (looks good) , but after creating the scene , all track ...
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1answer
55 views

How to solve camera for only part of footage?

I'm pretty new in camera tracking and Blender (2.80). I have a "long"(1 minute) dash cam footage of driving on the road, where most trackers stay visible only for a second or less, so a lot ...
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26 views

Blender 2.8+ Camera Tracking with variable Focal Length (zooming)?

I've seen on a couple forums that camera tracking with variable focal length used to be planned for blender all the way back in 2013 (for example here). Though all links I've found linking to the ...
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11 views

Bad motion tracking [duplicate]

I did camera tracking in Blender. The track was very bad despite a solve error of 0.4. The object slid back and forth slightly the whole time. I also set everything correctly (FPS, camera ...
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49 views

How can I move tracking markers along the timeline?

To explain the problem I have run into: I have created some tracking markers in the Movie Clip Editor and tracked several points in the clip, and I have added an offset to the movie clip so that it ...
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14 views

How to choose follow path to track camera in blender 2.83?

In previous blender 2.8 to track camera youll have to parenth camera with circle, then to select camera and circle, ctrl+p then follow path.In blender 2.83 after ctrl+p there is no option follow path, ...
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56 views

Why isn't the perspective/focal length correct in this camera track?

I'm attempting to use camera tracking on two similar photos to determine focal length and orientation and, subsequently, to reconstruct the scene with geometry. I've tracked all points manually, since ...
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14 views

Why do i always get solving errors with good tracking? [duplicate]

So basically i am a beginner 3D modeler, i tried to 3d camera track a video but i keep getting solve errors, my tracking points are not dancing it is still as a rock, Please help me, i already tried ...
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1answer
27 views

Mesh is not rendering, I can only see a background image (or nothing) [duplicate]

FILE: https://drive.google.com/file/d/1vdiEmix_mWpaWA5m_V9n8wBDobLRzSB2/view?usp=sharing I'm doing motion tracking scene and the objects that I put in are not rendering. They are rendering in viewport ...
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19 views

Floor in camera track flipped upside down [duplicate]

I have a 3d camera track and I have it solved perfectly but, when I set a floor, it looks like the floor would line up perfectly except, the camera is positioned upside down. Is there a way to flip ...
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20 views

VFX scene offset in compositor but not anywhere else

I have a scene I'm developing using Blender's VFX tools. Object was tracked in the video (png sequence), error was under 0.4, and I managed to model my object to fit as perfect as I care to. Once I ...
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40 views

How can I hide inactive motion tracking markers?

Haven't used blender since 2.79 and I can't figure out how to clear the inactive red tracking markers when they're done tracking to avoid clutter. In 2.79 there was a clear forward/backward button ...
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20 views

Object not visible in Cycles render

Basically I am working on a small project where i wanted to place a 3d mobile in a Footage. I captured the footage which included the small reference pieces for tracking. I tracked the camera in ...
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32 views

Tracking forward/backward camera motion

Has anyone been able to track camera motion going primarily forwards or backwards? It seems that whenever I try, Blender is unable to make any sense out of all the trackers going in all directions ...
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54 views

Motion Tracking: No Camera for Frame X

I'm trying to track a relatively simple scene, and I keep running into weird problems. I know that the scene is blurry and low quality with only imperfect trackers available, but I don't really care ...
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36 views

My Blender v2.83 didn't show “follow path” after press Ctrl+P

Why are there no follow path options for the camera after pressing Ctrl+P?
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1answer
34 views

Can't see the object in rendered image after motion tracking [duplicate]

I was watching camera tracking tutorials in youtube (Blender 2.8 Camera tracking tutorial (part 1)) and did exactly as shown in the video, but after motion tracking in the composite tab I can't see ...
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14 views

Shadow catcher not working

I was trying to make a camera tracking project for learning and everything was good until i encountered a problem , the plane was supposed to be catching shadow of the light on my background ,but ...
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1answer
71 views

Landing Gear Rigging Constraints using empties

So, I am working on a landing gear structure. I am using empties to connect the various parts. One in particular I am having trouble with is the "torque arm" which is supposed to move up and ...
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27 views

Movie Clip Editor Graph editor: How to edit single motion tracking keyframe?

im just messing around with the Graph Editor inside the Movie Clip Editor, and when trying to adjust a single key i noticed the key next to it also moves inversely is there no way to modify JUST the ...
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16 views

How to draw a line that tracks the path of an object on video [duplicate]

I am trying to find a solution to creating a follow flight path of a frisbee (but could be any object), similar to what is shown in this video (https://www.youtube.com/watch?v=cKQc1cxZV7Q). This ...
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1answer
29 views

Render is duplicating random frames when loaded into 3D tracker

I am trying to render an edited clip at 23.98 fps for use with motion tracking in a different project that shares the same frame rate. However, when I go to the tracker when the rendered clip is ...
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65 views

Motion Tracking Tripod with Given Camera Settings

I want to track some footage from golf, as shown in the image. I have used FSpy to determine the position and focal length of the camera. Modelling two balls at the correct diameter in this space ...
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1answer
64 views

How to optimize nodes and view layers created with motion tracking “set scene”

I have not used Blender in a long time but am working at learning some video applications for the software. what I have done is taken a sample video with a fair amount of camera motion and am learning ...
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39 views

Creating a 3d scene from a footage

I am new with Blender. I want to know which skills have to be learned to put a footage of someone talking in front of a camera (with some movement of the camera) in a 3d scene from Blender (any kind ...
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23 views

Motion Tracking works in viewport, but not in Render

Everything works fine on the viewport and on the Motion Tracking Menu tab. I have a solve error of 0.839 and 26 trackers. If I do a viewport render, there's no problem. However, when I do a normal ...
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17 views

How can I make the plane track of a single frame move separately from the others?

I've encountered a problem in my work. (As can be seen in detail in my previous question) [https://blender.stackexchange.com/questions/183768/plane-tracked-keyed-video-is-misaligned-when-moving-...
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16 views

Plane Tracked + Keyed video is misaligned when moving quickly

I have a video that I used Plane Tracking on, to key out a green board and put a video inside it. It's all working more or less correctly, but I notice that when the board moves quickly in the video, ...
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1answer
43 views

The color of my video is wrong when I input it into “Composition” [duplicate]

So, I'm tracking a video, then applying a vide on top using "Motion Tracking" and "Compositing" in Blender. My video's colors always came out a bit "whiter" and "...
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1answer
34 views

How can I use a green screen to add a video onto a moving plane?

So, I've been working on my project for a little bit now. I'll be holding some boards, and flip through them whilst superimposing videos on them. I've grasped Plane Tracking, and how to project (...
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35 views

How to have person in video mask added geometry as they walk in front

I have a video plate that I shot and have motion tracked into Blender. There is a person walking through the shot and I want to add geometry in front and behind them. However, things that should be ...

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