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Questions tagged [tracking]

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

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11 views

is there an easy way to delete all dead tracks?

I have a tracked out video and a lot of tracks failed. Is there a button or something to delete all the dead tracking points? It's a long process to go through and find all of them and delete them.
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14 views

Is it possible to export marker location over time?

It seems that the motion tracking workspace is designed to be used to guide a 3D scene, but is it possible to export the position of one (or more) markers over time?
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46 views

Tracking: Object Solver not following tracks (with file)

I am working on a scene where I have to track the camera motion and the motion of a prop with markers. I get a good camera track and a decent enough object track (It's just as a reference to the ...
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17 views

When rendering my animation, Blender renders one frame repeatedly

This may seem like a repeat question, but I haven't found a solution on Blender 2.8 Basically my animation is a face track that i have rigged to a 3d face model. I just want to render out a short ...
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How to make an image move along with the tracked data(like text which we see commenly) - Blender [duplicate]

I am trying to have an image overlap on a video (head.png overlapping a person's head in a video), for a meme. I tracked the person's head in the video using "motion tracking" screen. I know how to ...
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22 views

Camera Tracking - How to Reconstruct LocRotScale Marker To Empty?

I tracked a bit of video footage with a LocRotScale marker and tried to Reconstruct it as an empty but the empty doesn't have the rotating and scaling data. Now my Question: Is it possible (and when ...
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13 views

Why does rotating the camera mess up camera solve? [duplicate]

I am working on a project using camera tracking. I have a solve error of 0.3, and when I set up the tracking scene, besides the fact that the camera is rotated ...
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68 views

Can I use Blender like After Effects or Nuke for motion graphics?

I was wondering if there's a way to use Blender's 3d Space (not the compositor!) similar to After Effects without adding additional lights to do 3d motion graphics. I'd like to use the motion tracker ...
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18 views

why i cant see tracking markers in 3d viewport

I have just finished tracking and camera solving my footage. after setting up tracking scene, the markers are visible in the 3d viewport but only in the motion tracking panel. but when i switch into ...
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17 views

Equivatlent to 3dsMax’s “Expose Transform”?

Is there any possible way to get access to an object's rotation, in its parent's space, to use in a driver when it is being driven by a constraint like "Track To"? In 3dsMax I would have been able to ...
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1answer
10 views

f-curve modifier to an object that has an object contraint (track to)

I am working on a scene with a car chase and I am struggling with adding noise (rotation) to a camera that is tracked to an empty via object constraint. I have one camera that is static and tracked ...
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28 views

What is this flicker I get while tracking a camera? [duplicate]

After having my camera tracked, I decided to put in a cube for testing. But then I've noticed this strange artifact where every object kinda flickers and changes it's rotation.
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58 views

Animation nodes - How to make an object face camera yet let the object rotate around its normal?

Imagine an object, for example a Cube. Now Imagine the Camera. Imagine that, whatever the position of the camera is, you always want (a certain face of) the Cube to face the camera. This means that ...
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344 views

Is it required converting videos to an image sequence before doing motion tracking?

Some tutorials online recommend converting a video to an image sequence in Blender before using the motion tracking features. See https://www.youtube.com/watch?v=InIuTtt7W3E?t=135, which explains that ...
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28 views

How to only get one axis to track

So I hope in the scene below it is very obvious what I am trying to do. I basically want to have cutout models always track to my empty BUT ONLY on the Z Axis. I want 1 empty to control an entire ...
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16 views

Why a mesh “rotate” just the first frame when use “Track To” constraint

Well guys, maybe if you see the gif you will know. Don't know why the mesh (selected) rotate just that frame. Here is the .blen file BLEND FILE
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19 views

Applying camera track to external clips

I have two clips: One is background footage (shaky cam) that I have tracked and solved, set up scene in Blender, etc. The other is a .exr effect sequence rendered from Houdini I would like to layer ...
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10 views

Problem with tracking [duplicate]

When i'm trying to set origin, floor, X axis and Y axis my object just flips 90 degrees:
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28 views

Advanced plane 3d tracking and axis identification

Are there any ways to make 3d tracking better? Atm I have a problem with recreating room (example below). And as it can be seen red recrangle do not quite match walls, floor or ceiling. Quite nasty ...
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16 views

Motion tracking black clip

I was using blender 2.81 I pressed something on my keyboard, and the footage turned black. The preview of what the tracker can see is still fine. I can't share the blend file because of privacy ...
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48 views

issue tracking sequence

I am new to blender, I recently started to learn VFX. I get an issue with tracking. I keep getting those 2 errors : - ...
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8 views

Camera track a Grase Pencil layer?

I’ve done a camera solve for a video background, but can’t get my grease pencil layer to distort based on the generated trackers. I can get it to move with one tracker’s position, but no idea how to ...
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28 views

How do I attach an object to an animated Fps Model?

My goal was to have a rectangular prism under an animated first person shooter arm and track its transformation without it warping. This is the arm that I am using. As you can see there is no ...
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1answer
16 views

Object Appering in preview mode but not in renders

I'm Trying to render a box on top of a video that ive tracked in the 3D viewport everything looks fine but when I render the frame using f12 the geometry is missing from the rendered image. I'm ...
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31 views

How to export a 3D Matchmoved camera?

I used the Blender Tracker to create a 3D Camera solve and need to export it to another 3D package but can't seem to figure out how. Neither FBX nor Alembic take the animated camera with it.
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16 views

Track or monitoring of 3D displacements with Blender

my question is related to the motion tracking feature in Blender. I have successfully applied this feature to track the movement of a series of markers in a column during an Earthquake, based on a ...
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1answer
25 views

How do I fix the camera roll to its parent object? Blender 2.8

I have a space ship that follows a path across my scene with a few cameras to record it. One camera I would like to use for a sort of point of view effect when the ship enters a barrel roll, however, ...
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28 views

Trouble making an Xwing aim with a crosshair and sight

I have been working on a flight simulator game for a while now, and have run across a problem I can't figure out. The spaceship is an x wing and I have all the logic with shooting and all that, but I ...
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8 views

Strange moving Texture in my Visual FX shot during following a YouTube Tutorial

When I try to recreate the effect in this Youtube Tutorial (https://www.youtube.com/watch?v=3df4Lxchf4Q&t ), then the last steps where he is connecting the track position node with the translate ...
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20 views

How to parent a mask to more than 1 Trackers?

I have done a track where are many trackers. Now I have created a mask around this object that I have tracked allready and I would like to parent the mask to all these trackers so that the location, ...
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38 views

Text Motion Tracking in Blender 2.8 [duplicate]

I'm in the movie clip editor screen and I've just successfully created a motion track. I want to add a .png image of some text and attach or parent it to the tracker so that the text follows the ...
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23 views

How to track moving camera footage in green screen

I already read this Inserting green screen footage into 3D space . But I still have some questions as I am pretty new to Blender. So I have a green screen scene and I put my camera on a slider to ...
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238 views

Camera tracking data import

Is there a way to import camera tracking data, like .json or .jsx files into Blender?
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1answer
54 views

How can I show the Search Area box on a tracking point?

This has never been an issue until just now but consulting the official documentation it appears that there should be a search box which is distinct from the pattern area. https://docs.blender.org/...
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Misaligned Background Image in Viewport but not in Viewport Render Image

I've been camera tracking a simple shot and I am experiencing an odd behaviour when setting up the tracking scene. Below is the view from my viewport, all of the points look misaligned despite a low ...
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1answer
19 views

Change length of motion track marker trails?

I thought I had remembered there being an option to adjust the length (in frames) of the red and blue motion trails of the markers in the movie clip editor. Does such an option exist?
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18 views

Eevee doesn't render 3D camera track but cycles does?

I've camera tracked the scene and everything in the compositor is right yet, when I rnder this out in Eevee, even though the plain is in the "background", it still renders it. But in cycles, it works ...
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17 views

Motion Tracking not tracking

I tried using the motion tracking feature again and when trying to track, after about 300 frames the trackers just can't find anything. I've already tried lowering the correlation and hand tracked ...
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17 views

Weird grey bar at bottom of movie clip

I'm trying to use Blender for some basic motion tracking, but I've already stumbled upon an issue just by importing a movie clip. My clip is ok, but when I import it in Blender (the exports have it ...
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1answer
91 views

Import FBX Camera animation - rotation issue?

I'm trying to import an animated (position and rotation) camera from a FBX file, however, when I do the animation is completely wrong and doesn't match the movement of the camera from the other ...
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14 views

Modify timing of a camera tracking

Let's say I have some movie footage (250 frames, say), do motion tracking, and solve for camera. Now I want to play through the tracking and associated background footage at a different pace. For ...
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Motion Tracking: When will “Prepass” enhance Motion Tracking quality?

I tried to figure out, when Prepass should be used in the Motion Tracking Settings. I understand from the wiki that... Prepass Enables a two pass tracking, where the first pass is a brute ...
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how do I use my motion tracking data (face track) and apply that to a MHX2 rig already applied bvh mocap?

I have tracked my face using motion tracking and linked empties to track. i would like to apply this data to the face keys of the MHX2 makehuman (which will have its own bvh from carnegie melon) - ...
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20 views

How to track the sky to get the fly over effect

I can trackmotion on the ground and put in one object but I don't know how to fly over the sky. one aircraft fly over the sky with camera movement. There is no track markers can set the floor,all ...
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29 views

Rendered motion track is jittery despite low solve error (0.3)

I have done some motion tracking and overlayed a 3D model onto my tracked footage. The track itself seemed promising, with a solve error of about 0.3 (after a lot of fiddling). Scrubbing through the ...
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44 views

Dopesheet (motion tracking): Keyboard shortcut to jump to keyframe?

I'm motion tracking a long shot (1000s of frames) with numerous tracks which are only valid for a portion of the footage. It's hard to discern if a track has stopped tracking because its gone out of ...
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1answer
45 views

Reconstructing camera panning movement in 3D view using track data for Loc only

The idea is to do exactly what CG Matter did here but instead keep the empty fixed in the global system, and have the camera move. The camera is basically panning over a surface. It seems as if the ...
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43 views

Solve error skyrockets after filtering

Before reading: I have already followed this popular post and this post on lowering solve error intensively, along with this guide and this guide. However, when it comes to eliminating tracks that ...
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21 views

Why does Movie Clip Editor use so much memory?

What's the reason behind blenders intensive use of memory when it comes to video editing/tracking? I'm using Blender 2.8 and currently have a ~15 second clip loaded (@50fps, 3840x2160, 99779kbps, ...
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10 views

How to make a path from plain axes?

I've tracked a video moving straightforward with After effects, and imported it to Blender 2.79 by scripting it. https://www.youtube.com/watch?v=25PdKbXHDe8 The markers were imported as many plain ...

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