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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7 views

Tracked clip disappear in render view [closed]

I´ve tracked a clip in blender but every time I go into render view, it disappear
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What I should put on Sensor Width when I tracking the Camera?

I am tracking the camera on a scene but I don't know which is the Sensor Width. I recorded the scene with a Xiaomi Redmi Note 9 Pro, but when I search about cellphone's sensor width; it give that the ...
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Which keyframes A and B should I pick when tracking a circular motion?

I'm trying to track a videoclip where the camera moves around an object M in a circular motion. I added a picture to make it clear what I mean. Since the camera is constantly turning, and tracking ...
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1answer
4 views

Issue with parenting tracked nulls to get Orientation for mesh

I am currently trying to figure out how to get the data that has been tracked from a footage. I need to track an arm in order to get the movement and replace it with a mesh (that has no hand). After ...
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33 views

How to get the updated rotation of an object during soft body physics simulation?

I am trying to get the updated rotation of an object during simulation in Blender 2.92. However, I am not able to get what I want. I appreciate if someone can help me with this. As you may know, you ...
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99 views

Which 3 points are best to get a good floor? (Motion tracking)

When I set the floor of my tracking scene, I have to select 3 points to use. However, I noticed that the orientation changes depending on which 3 points I pick. I always thought it didn't matter. But ...
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1answer
23 views

What is the sensor width of an iPhone 11? I need it for motion tracking [closed]

I recently filmed a video with the iPhone 11 and I'm having trouble finding the sensor width needed for motion tracking. I have found online it uses a 1/2.55 sensor width which blender actually offers ...
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19 views

Export tracking markers - Python

I'm trying to create mesh on tracking markers with python by this code: Exporting camera tracking markers from Blender However I'm still getting error: Line 19, in execute TypeError: Element-wise ...
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Why is my background video in the animation panel slowed down/lower frame rate than in the motion tracking panel?

So I added my image sequence into the motion tracking panel, it's 561 frames and looks good when I play it. When I set this video as the background and look at it through the camera in the animation ...
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18 views

Is it possible to keyframe the camera by hand instead of motion tracking?

I’ve been trying to track a complicated clip for a few days already but just can’t get it to track properly. Would it be possible to set the clip as the background and keyframe the camera by hand? ...
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2.92 Inverse Trackpad Movement?

I just installed 2.92 and it has inverted my trackpad movement in the viewport. Edit>Preferences>Navigation>Orbit & Pan There used to be a setting for 'Natural Trackpad Movement' it isn't ...
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Rotation stabilization resulting in weird effect

I'm using version 2.92 of Blender and recently started learning it with the help of tutorials. This is what led to my problem: I set up two track markers on an imported image sequence in the "...
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1answer
48 views

How do I separately apply color correction to a model and video clip?

So I'm making a scene where I put my model in a clip I tracked. I think the lighting looks good but the colors of the model itself look overexposed compared to the "flat" colors of the video ...
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20 views

Motion tracking rotation too small

After solving my video I see that the rotations are too small (I rotate panoramic in 180 degrees, and then back halfway again, but camera only rotates 90 degrees). Any tips on what can cause this? The ...
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22 views

Failed to solve the motion: most likely there are no good keyframes

I chose my camera tracking point, I locked them but when I go to Solve Camera Motion, I received this messege in red "Failed to solve the motion: most likely there are no good keyframes". ...
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16 views

Replace all 3d markers with 3d meshes

I have got a bunch of 3d trackers, and for the specific thing i am attempting to do, i would like them to all be replaced with planes that still follow along the tracked motion.
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21 views

Locked track Camera error [closed]

Locked track object to camera x axis is very strange When camera is on z axis(rotation) x axis of cube turn up Is python can change it?
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22 views

How to track footage that goes in a circular motion? [duplicate]

I've been trying to track the game footage in the link below I tried tracking everything myself, and the detect new features method when some tracks are starting to disappear, the lowest I got was a ...
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1answer
29 views

Car model does not render after using motion tracking, but its visible in viewport

I am fairly new to Blender.(I am an experienced Maya 3D artist) I'm using version 2.83 on an iMac. I have rendered simple 3D models before using blender and the Eevee engine. But I need to test motion ...
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44 views

When should I rotoscope in the compositting proces?

I already made my animation and I’m going to composite it in a videoclip. I’m currently tracking the clip, but there are going to be some occlusions in front of the animation that I need to rotoscope. ...
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Semi-AutoTracking

I want to automatically detect features track 40 frames detect new features track 40 frames and so on. I found this this addon but it does not work in 2.91.2 (I suppose my files are too heavy float ...
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10 views

Influence on Object Constraint and Visual Transform ruins earlier keyframes

So I have a camera parented to a null object following a path with the follow path constraint, which works fine. I want the camera to focus on an object at a given time and then after some time stop ...
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15 views

Camera tracking: Render only shows model, not background movie

So I've set up the nodes to composite the background video but during rendering the 3D model shows up and not the background. I've set film->transparent and done everything I could find. Can ...
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1answer
52 views

How to camera track complex shoots? [closed]

I am not able to this shoot https://youtu.be/PkEsl5c5nC4. The starting is good but then it diverges. These are my trackers and error is 0.41 this is my hold out material because I need the scene to ...
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22 views

Motion tracking: I have a solve. Now how to get the camera position for each video frame?

TLDR: I've solved camera motion for a video clip. How can I export each camera's position and rotation to "real", unconstrained camera objects? I'm using Blender's motiong tracking tools to ...
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24 views

Mask cables in footage and change its color

I have a charge cable in the footage which I want to track the cable and change its color, here is how the footage looks like from the very first frame to the last frame: The red point is where I want ...
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20 views

Camera solving - what algorithm is used?

Note: this question is about how Blender is implemented, not how it's used. IIUC, Blender uses 8 points (or more) at two keyframes to calculate the position in space of the camera. What is the ...
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1answer
40 views

Tracing object with rotation constraint

I tried making a gun turret that would be pointed at the empty , and that part works so far but the limit rotation does not work at all and the barrel goes up too high: The constraints are shown ...
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1answer
31 views

Physics in tracked scenes, not working

I've already made plenty of Blender physics simulations in my life but when i try physics in a camera tracked scene, literally nothing happens. Always. All setup is the same as in other scenes but ...
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1answer
6 views

check if movieclip track has segment

I'd like to remove all tracks in a movieclip that don't have any segment. Since there's no such operator, I'd like to do it in python but I can't find a way to check if a track has a segment. I've ...
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23 views

How to motion track/set tracking points for cable/rope

How to motion track Cable/Rope in blender, I've managed to do the track for the object which has certain degree of contrast, but the cable/rope has the same features along a curved line in 3D space, ...
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47 views

tracking operators ignore frame update [duplicate]

I'm trying to make a script that adds motion trackers every n frames and tracks them but I can't get the detect_features and ...
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11 views

How to map mocap data to MHX2 model

I am using blender to create a motion capture of my facial movements using the motion tracking feature. When I create the motion trackers and I enter the default mode, I would like to map those to an ...
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1answer
20 views

Can't solve my camera [duplicate]

I was tryng to track my scene. I made and image sequence then exported all the jpg pictures. To get tracing points I used the "Detect Features" option to create keyframes. When I was ready I ...
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1answer
34 views

What Lens Model does Blender use for Camera Tracking?

I recently started working with the camera-tracking estimator to produce short augmented reality videos. I'd like to learn more about the lens model and its parameters (K1, K2, etc...). Can anyone ...
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time shifting of either solved tracked camera or 'dynamic paint' baking

I am trying to add an animated ship to the real footage of the ocean. I have the solved camera from the footage. I have the ship model. Now I need some wake waves. I can get them using dynamic paint, ...
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1answer
19 views

Motion track image does't appear in render

I make sure the transparent checkbox was hit, but the only thing it appears in render is this.
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1answer
53 views

What is the pixel error in motion tracking?

When 3D tracking, you have a pixel error. Is that error the number of pixels the track will stray with each frame, or the entire track?
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1answer
30 views

Motion Tracking. What is the actual scale for “Set Scale”?

When doing VFX and tracking, there is an option "Set Scale" to set the relatively same scale to the 3D interface as the video you're tracking. What is the actual size for the scale (is the ...
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13 views

Camera motion tracking: How to adjust to make the solve < 0.5? [duplicate]

I am trying to understand how to best approach adjusting a camera track to get the error down to something < 0.5 px Video clip is 141 frames, HD There are 8 markers/tracks All of these tracks look ...
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15 views

Camera motion tracking: “Unable to reconstruct” due to “POINT BEHIND CAMERA 1” [duplicate]

I am doing a very simple camera motion tracking, and I almost always get the errors: ...
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18 views

Tracking an imported video without a visible floor- Can it be done?

Title says it all, really. When tracking a shot, it asks you to pick 3 points to make a floor plane and it bases everything off that. Can you track a shot without a visible floor? I have a very tight ...
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22 views

'Extended' Tracking?

I seem to have 2D tracking and camera tracking in After Effects licked. Blender tracking, however - is foxing me. I prepared my shot - putting mini beanbag tracking points down. The shot involved my ...
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21 views

i need help with CGmatters facial motion capture tutorial

I have a 3d model with the face capture working for the face mesh, however I don't know how to add back the mouth (roof of mouth, floor of mouth, teeth,and tounge) to work with it. The tutorial im ...
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9 views

Cancel the tracking scene, return to default render layer [duplicate]

I did camera tracking and applied set up tracking scene...then it create its own render layers....like it create foreground and background layers....I want to return to default render layers...but ...
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19 views

Single verts mesh not moving with tracks even after hooking to the track

I watched a video made by CG Matter, and tried it yesterday, and it worked fine. Excellent, even. so today, I tried it with other footage. I added the verts, snapping set to vertex, to each track ...
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1answer
33 views

bad camera angle (or trackers?) with aerial footage [duplicate]

Got this drone footage to track of a big truck patio. Huge stuff. The drone is quarter-circling the warehouses, and I could get me 8 solid tracking points and the camera solved. Set the floor with 3 ...
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1answer
34 views

Motion tracking footage from 24 DSLR cameras fails, but why? [duplicate]

I am driving a bullet time rig with 24 cameras and now I want to put 3D objects into the scenery. The 24 frames were shot in a studio with a clean white cove where markers were put all over the walls, ...
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37 views

Hiding a plane track behind an object [duplicate]

I'd like to create an effect where I reveal an image when opening the cupboard's door. So far I've created a plane track with the image in it but can't figure out how to hide the image behind the ...
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10 views

Copy offset location from track to bone

I have tracked dots on a persons face but when I copy the location of say the chin dot, to the jaw controller, it goes way off, even with offset selected. What am I missing here?

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