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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14 views

Why did my tracks disappear?

I shift-clicked the X, you know the one next to the F for saving a data block; did I just erase all the info from the solve? I thought the tracking info was linked to the Camera, not the video clip? ...
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25 views

Does scale of camera have an effect on camera tracking a scene?

I am doing a camera match/track (markers on the floor and walls, they are scaled differently and key frames on necessary frames when something passes in front of the tracked point). Sorry if this ...
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27 views

Solve camera motion in Blender: exact camera data or refinement?

My footage is made with a Phantom 4 Pro (for which I know the exact camera data - sensor size, focal length), and would like to solve camera solution as precisely as possible. Which of the following ...
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26 views

How can I track illumination on a polygon in blender?

I am looking to be able to track the amount of light that is present on the different surfaces of a polygon, any ideas welcome. For example I am looking to record the amount of light/illumination that ...
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21 views

3d track stabilzed video?

Tracking shaky/handheld video is difficult because a) motion blur and b) potential track marks jump around wildly. The first makes the quality and precison of a match worse and the second requires to ...
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26 views

How do you save a composited clip over tracked footage [on hold]

My motion tracked video doesn't render the model with the video. It only renders the video. I'm motion tracking in blender from a tutorial, but when I render the animation, it only saves the video ...
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11 views

Does tracking marker pattern area being moved affect camera tracking?

Does tracking marker pattern area being keyframed to a different shape affect/effect camera solve camera match? Does tracking marker pattern area being key framed to a different shape affect (effect) ...
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1answer
42 views

Tracked video not showing in the 3D viewport in rendered mode

When I try to composite this with my cg object it doesn't work. After completing the tracking I have set the tracking scene, but the video behind doesn't works or shows while in render mode(cycles). ...
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27 views

Tracking Problem with floor and wall and other things [duplicate]

I'm try to track a video with a garage. I tracked the garage and the solve error is 0.11 because there is no movement, and now I want to model a sci-fi door that will be placed instead of the garage ...
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24 views

How to Solve One Marker Track

I have simple web page scrolling (up & down) with only one marker (per several frames). It's basically motion in Y axis. How can I get this "analyzed" data to be solved, since blender is asking ...
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33 views

Camera tracking; movie clip does not show up as background footage

I tried to replicate what Andrew Price did by creating a large sink hole in the middle of the road using blender. https://youtu.be/CVPcT0dJmoY I have tried to replicate it, but I am stuck somewhere....
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38 views

When should I use different tracker motion models when motion tracking?

I'm trying to get into motion tracking but don't know when to use different tracker motion models, or if it makes a difference in the outcome of the track. Could someone please explain, or link me to ...
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25 views

Exporting camera tracking markers from Blender

I am trying to use blender to do some matchmoving and then export the camera along with the tracking markers for use in other software. After getting a successfull track, I have created a vertex cloud ...
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33 views

How can i reduce the size of my shadows?

I am lighting my scene with an spherical environment map. As you can see in the image below, the shadows casted on my shadow catcher are way too big. How can i change this?
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30 views

motion tracking timeline colors

I can't find the answer in online docs, or elsewhere. Would you know what the magenta colour means on the motion tracking timeline? There doesn't seem to e different amount of valid tracking markers, ...
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23 views

Can't motion track backwards

So I'm trying to track a panning footage(start in center, pan left, pan right without stopping in the middle, and back to center.), and I want to place the tracker in the end where there is no motion ...
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17 views

Can i adjust a null tracker to be the one move and NOT the whole 3-d plane?

This is my problem: https://gfycat.com/HelplessCautiousAlabamamapturtle My entire 3-d plane is moving instead of just one object
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14 views

How to add a 2D png into my tracking data instead of using a 3D model [duplicate]

I have a GIF I'm working on where I track a 2-D PNG of Nero's head onto tracking data. Trouble is, every tutorial I go to uses a 3-D model (like the monkey) to link to the tracker and none uses a 2-D ...
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20 views

I've compiled all my tracking data but when I go to default to add the object, the video isn't in the background

I'm tracking a child on a swing on the video editing window and clicked the Setup Tracking Motion button in the Solve tab to ready the footage to edited with 3D objects in Default. But lo an behold, ...
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23 views

Motion Tracking Invisible Object Not Doing Its work properly

Okay, I am not very good in the motion tracking sector, but basically, the shadows are very weak and I have no idea on how to change that, they are so weak to the point of being invisible at some ...
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19 views

Does the motion tracker follow a point if it changes colour throughout the video?

Does the motion tracker follow a point if it changes colour throughout the video? Like an colour changing led dangling from a pendulum or a firework mid-flight?
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1answer
40 views

Solve Error High [duplicate]

I don't know why the solve error is high? It should have been an easy tracking. Footage have well contrasting markers. Can anyone please help me understand why this is happening and how can I get more ...
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18 views

How to get realtime reflections from motion tracked video?

I wanted to know if there is a way to get realtime reflections from a video, like if I have a motion tracked shot of a balloon festival; Naturally this will have a lot of moving colors so it isn't as ...
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18 views

Wrong tracking marker position [duplicate]

I have encountered a serious problem when using tracking markers: I tracked a single point over a range of 3000 frames in small steps e.g. I manually corrected the position every 50 frames. When ...
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102 views

How to use the XML file (which contains the tracking informations) produced by Faceware Analyzer with Blender,better if 2.8

I'm playing with FaceWare Analyzer. I have imported a little video which contains the facial (eyes,mouth,eyebrows) movements of a guy,I have tracked them and I have exported the XML file which ...
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13 views

Damped track twisting or how to make robot's joint

I'm rigging my robot's model (consisting of many meshes) and have been trying to solve joints' behavior problem (it's a problem 'cause I wanna use mocap for him) for a long and have ended up with ...
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12 views

Won't get a render at all after my CameTrack

I am working on a camera track scene and everything looks fine until I want to render the scene, I get a transparent output but I can't see why. I have checked the compisite layers, removed any mesh ...
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16 views

Aligning motion tracked points to geometry

I'm motion tracking a video of which I know the exact 3D coordinate of each tracked point. I have a 3D replica of the scene and want the camera to align with this scene. Is there a (semi-)automated ...
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41 views

trackers not showing after making camera solver

I've been tracking a video but when I add the object constraint "camera solver" trackers aren't showing in the 3D view...can you help me, please? Thank you
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1answer
61 views

motion tracking - is there a way to automatically clear tracks after they leave the frame?

hi there I am tracking a video with many tracking points to decrease solve error. many of them leave the frame by the end of the video. is it possible in anyway to automatically clear track data ...
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1answer
70 views

Help with determining camera specs? Blender Motion Tracking

I have some experience working with Blender's motion tracking capabilities, but have only used cell phone video that happened to be presets in the camera specs dropdown in Blender. I am trying to do ...
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21 views

How to link armature to empty tracks and insert animation to the animation?

I have a set of empties with animations which act as bone joint positions. I want to link an armature to it and I want it to receive the animation by following the bone joint positions. I tried copy ...
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38 views

Object won't render over tracked background image

I've been working on an animation trying to incorporate animation into the background images.I don't know the reason why it won't render the arm. I tracked and solved the motion in the movie clip ...
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1answer
140 views

Photogrammetry using blender to Create a Dense Mesh and automatically texture them

Photogrammetry is the basic requirements when you are working with rocks and other nature assets. I searched the whole internet in order to find out if there is any tool which can help me in that. To ...
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79 views

motion tracking : how to extract 3d position from selected 2d tracker

I already solve my camera and created 3d scene successfully. Now i want to do 2d track the original clip and by using solving data, i want to extract that specific point into 3d coordinate (as empty ...
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1answer
16 views

Motion tracking : setting parameter for multiple selected trackers

I have 20 trackers which need to be re-tracked and i want to change the method from 'loc' to 'Affine'. But how to set this for all the trackers at once ? i can select multiple trackers but the ...
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1answer
23 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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49 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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16 views

Is there a way to refine tracking with a mesh? [duplicate]

I'm trying to track some footage at 1080p @30fps. It is GREAT up to a section of frames, where the physical camera is still moving, but the Blender camera "freaks out" and spins looking off into the ...
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28 views

Mouth animation with motion tracking

I modeled a face and now, I want to animate it with a motion tracking. 1 - In the motion tracking panel, I track my mouth with the white dot around it. 2 - I go to "reconstruction" and I click on "...
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45 views

How to track video and key out green screen?

I have been using blender for a while and the biggest thing I struggle with (that I can find no help with), is how to place your green screen footage into into a 3d scene, key out the green screen, ...
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1answer
44 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
29 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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31 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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165 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
152 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 ...
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12 views

How to tie two tracking points and text

I can tie text with one point. I can track 20-30 points and build full scene, but it's to long. I need easy way to tie two tracking video points and text.
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1answer
57 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
89 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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27 views

I can't see my background footage in camera viewport and render

TL;DR at bottom I have a scene where I am tracking a ball above a river. I am working on my macbook and I am currently overseas in europe. I am using teamviewer, a screen sharing app on my surface ...