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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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7 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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29 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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17 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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20 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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16 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
20 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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10 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
33 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
80 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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16 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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13 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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19 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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19 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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27 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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23 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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21 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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27 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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18 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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17 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
71 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
119 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
16 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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33 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
84 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
46 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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36 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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37 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
27 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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26 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
90 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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1answer
62 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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23 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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27 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 ...
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1answer
224 views

How to overlay someone (and his/her movements) in a video clip tracking eyes,face,mouth of a 3d character

I want to replace/overlay the faces and the bodies of the people that are in a video clip with a series of 3d characters of the same size and shape. I set up 8 tracker points for the character's ...
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13 views

Masking of markers by parenting them to trackers

I am here to ask something about masking i did for a video recently. Actually i was tracking markers to add something from blender. Later I wished to remove markers. I mask the markers and made them ...
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36 views

Object becomes Transparent when Rendered with Camera Tracking

When I set the Viewport to render It shows the Object How I want it however when I actually render the Image it shows very little pieces but black almost transparent looking. Picture 1 shows the ...
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21 views

Camera tracking: pre-calibrate markers

I want to perform camera tracking where I first film a sequence where all the markers can be identified very accurately, and then the track the actual film from which I know my motion is not very well ...
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53 views

Motion Tracking Render Settings? Missing Video?

Ive completed a tutorial on motion tracking, and in my shot, i basically pan around a table where I added a "square hole" that goes down into the middle of it. It appears to follow through very well, ...
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33 views

Motion tracking empty track, armature

I would like to ask if I can rotate only one edge of a bone by parenting it to an empty track exported from a motion tacking video. Is this possible? Thank you very much
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152 views

Motion tracking to perfect overlay people in a video with 3D characters

Let's say that I have a lot of small scenes that I have extraced from a long video and I want to overlay the actors who are shown on the video with as many 3D characters created by me. I want to ...
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1answer
57 views

Motion tracking. The edges of undistorted footage are cropped, and so are the elements of the 3D scene

I'm working to implement CGI elements to a short film using an Anamorphic Lens. The distortion off these lenses are quite beautiful but I am running into issues with cut-offs after implementing with ...
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17 views

Set camera constraints as if it were from solver

first of all: I am very new to Blender Python :-). I performed a camera tracking on a video and I have now a camera with a MotionConstraints on it that moves accordingly. I am able to access the ...
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60 views

3D Tracking an object that follows camera motion

I have a unique scene that I am attempting to solve for motion. It is some aerial footage of a camera following a moving train along a track. The camera is basically flying alongside the train from a ...
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1answer
137 views

Shadow Catcher object causing brightness issues in scene

Okay! Through help on this page I was able to go from this tutorial about camera tracking... https://www.youtube.com/watch?v=CVPcT0dJmoY&t=2121s Redoing the whole thing with Cycles instead of ...
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1answer
63 views

Shadow Catcher, Shadow Rendering Behind Tracked Camera Scene

I asked a question before but I think the problem has changed enough to ask it in a new way. I tracked some footage using the setup tracking scene button, and had issues with the rendering. I ...
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1answer
34 views

How can i make the track to constraint track on x axis using location transformation instead of rotation?

When i move my bone that i assigned to the eyes of my character using track to constraint they will track up and down but only will track side to side when i rotate the bone. is there any way to make ...
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156 views

Camera Tracking Shadow

I was following this tutorial https://www.youtube.com/watch?v=CVPcT0dJmoY&t=346s which is a bit old but I was able to get it through the camera tracking and to the point of adding 3d objects to ...
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1answer
74 views

FBX file boujou track data lags behind video

I got my FBX track from boujou in blender but I can't seem to get the track to move with my video, I've checked the frame rate and made sure all settings in boujou match blenders. The track is ...