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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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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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14 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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32 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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32 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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32 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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15 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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36 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
77 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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25 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
9 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
20 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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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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22 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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27 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
35 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
20 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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26 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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52 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
83 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
45 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
84 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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20 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 ...
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15 views

Projecting images onto virtual ground plane for VFX

I was watching Captain Disillusion's video on the invisible box challenge https://youtu.be/eKFrZNXB29M?t=179 and at 3:20 he talks about how he projected this image onto the virtual ground to remove ...
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14 views

Why is this track returning a solve error of one even though the tracks are accurate [duplicate]

I am really new to tracking and would like to know how I can fix this track so that the camera doesn't jump in the scene and so that it is smooth. Thanks! DOWNLOAD: http://www.mediafire.com/folder/...
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11 views

How do i point track a video into another video

I'm learning how to motion track in blender but the only thing I'm confused on is how to get a video into the one I'm editing and have that entire video tracked by a single (or multiple) tracks. ...
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20 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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21 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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32 views

How do I make my shadow catcher shadows darker?

Hello I've been trying out motion tracking and I made a little scene with a horn on my desk, and I have to big windows on the wall to the right so I replicated that but the shadow from the horn isn't ...
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25 views

Why is part of the motion tracking dopesheet grey?

I motion tracked and solved a bit of footage and on the dopesheet it has different colors. I know green is solved motion, red is not solved motion, but what is grey? It also has the required 8 ...
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22 views

Solve error is high even though my markers follow well

I've been motion tracking with blender for only maybe 1-2 months and I am still having a few issues. In this blend file all the markers seam to track very well, but my solve error is still 1.5 and ...
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32 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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19 views

Follow path for Camera connect it to wrong point on “path”

Follow path for Camera connect it to wrong point on "path", so when I press play camera just starts to turning around like crazy. maybe you know what's the problem and what's the solution? enter ...
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21 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
80 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 ...
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1answer
126 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
20 views

Video with masked objects that need shadows

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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36 views

How to make a mask follow position and rotation using two location markers?

In the movie clip editor, it is possible to create a mask that follows a marker in its position and rotation if the marker is set as LocRot. However, is it possible to achieve similar behavior using ...
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1answer
105 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
50 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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38 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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38 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
32 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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27 views

Output object 3d camera position for each animation frame

I have 50 frames of animation of an object. I want to track the position of a point on the object relative to the camera for each frame. How do I output the 3d position of the point, in camera ...
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1answer
116 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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98 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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27 views

Track + Mask 3D eyes onto a prosthetic Alien mask?

I'm making a short film with an alien in, the alien will be an actor with a latex mask covering most of his head (except his mouth.) My plan is to give the mask green screen eyes and tracking ...
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28 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 ...