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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18 views

tracking operators ignore frame update

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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7 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
18 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
31 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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7 views

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
17 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
30 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
16 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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12 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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13 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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16 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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11 views

Tracking Problem / Object don't stick to the ground [duplicate]

I filmed a scene and then converted it into an image sequence and imported it into blender.I would like to track this scene in the software. I used the perspective function for this tracking and got a ...
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21 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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19 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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18 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
24 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
32 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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31 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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9 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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19 views

Floor plane is not visible when I switch to Material Preview or Rendered mode

I have been trying to follow this awesome tutorial by CG Geek: https://www.youtube.com/watch?v=hymtATx1QXw For some reason though, when I switch to Material Preview or Rendered mode, all meshes in the ...
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20 views

Why do the wrong parts of my character move when I move a bone?

When I pose my character's arm, his hair and "ear communicator" and sometimes the visor of his hat move with the arm. Also when he kicks, his shoe/foot detatches from the mesh. I joined him ...
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12 views

Gaussian blur is not exactly following the tracked path

There's a video in which I'm trying to apply a gaussian blur to a moving object and in order to do this, I've followed a video tutorial which shows you how to track an object in the 'Layout' and add a ...
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1answer
154 views

How to do camera tracking for a video shot in portrait mode?

Whenever I try to do camera tracking on a video that was shot in portrait mode (1080x1920 pixels), I fail to get a proper result. In the 3D view (with the video footage as a background) the trackers ...
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2answers
70 views

What's the difference between the Undistortion node and the “Render undistorted”option in the camera background settings?

When you do camera tracking in Blender and press the "Setup Tracking Scene button", Blender automatically sets up a compositing node configuration that makes is easy to add 3D elements to ...
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18 views

My solve error is only .6 yet stil the 3d markers are all over the place in the reprojection [duplicate]

I have picked some quality trackers that stay in point for all of the shot. When I solved the camera motion it said the solve error was as low as 0.6. The reprojected markers are all over the place ...
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1answer
93 views

Masking footage over 3d objects in Blender 2.8+?

I don't get how to make a mask and use it properly. What I'd like know exactly is how to make a mask of a certain area of the footage, keep it tracked to the footage and make the mask layered in front ...
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29 views

Blender Camera tracking frame invisible

I've solved a camera tracking with 2 images, in Blender 2.83 LTS In solved camera view, frame 0, I add a Sphere mesh. When I advance to frame 1, I can see no Sphere mesh. How to see the mesh in frame ...
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1answer
19 views

3D camera tracking and object tracking are not on right position

I'm sorry if this question as already been asked, but I couldn't find it anywhere so asking again. If someone knows please write in comments. The story is, I've a video clip form (hollywoodcameraworks)...
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1answer
22 views

programmatically create tracking markers and set per frame coords?

I would like to import a series of coordinates for multiple "points" for multiple frames but I can't find examples. I saw how I can add markers with ...
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1answer
25 views

Random Streaks in Appearing Only in Final Render

My rendered animation shows a large streak on some of the frames, and not on others. The streak doesn't show in the viewport, only in the final render. Rendered using cycles. Here is what the Render ...
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13 views

Trying to upload two images in sequence in movie clip editor but it only adds one and fills all frames. How do I fix this?

Ive done it before and its worked. Trying to set up a tracking scene so I can drop a model into the photo accurately. For some reason it has stoped working and only loads in one of the selected images,...
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1answer
40 views

Why don't my tracking markers stay in position?

This is my very first post here. After having used it a few times in the past, I recently started playing around with Blender again. At the moment I'm experimenting with Blender's camera tracking ...
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40 views

Why does my 3d object move around even though I have good motion tracking

I've switched from native Blender motion tracking to using April Tools mentioned in CGMatter's video. This seems to be working really well. However, I have a 3D model of a porsche that is giving me ...
2
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1answer
41 views

Distance points between frames in motion tracking

I am learning how to track points in Blender and was wondering if it is possible to get the distance a point travels when tracking points. Blender shows a line with 'knots in each frame to show its ...
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0answers
29 views

Camera and lens settings/preset for iPhone 11 Pro [duplicate]

I've recorded some footage using my iPhone 11 Pro that I want to track. Using Google I found that the primary lens (the one I used) has a focal length of 26 mm. However, I understand that for proper ...
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1answer
26 views

How do I make multiple things in the background the “ground and have them as ”shadow catchers" [closed]

I am building a scene with multiple planes in the background because I want to have the multiple planes working as shadow catchers except, when I put them in the background, they don't behave as ...
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1answer
47 views

3D objects in tracker scene slide off position

I have a video footage shot on an iPhone 8, that I want to track and use in Blender (to add objects etc.). I added a couple markers and these track pretty well, I can get a fairly low solve error (...
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1answer
21 views

How to mask out a object in motion tracked shot to put people behind things?

I want to put the girl behind the cup. How can i mask the foot of the girl? This is a motion tracked shot that moves so it doesn't just stay still.
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1answer
44 views

Prefetch maxing out 20+GB of RAM over a 355MB jpeg sequence

Pretty new to Blender - I'm having difficulty wrapping my head around how Blender caches image sequences. I have a 355MB jpeg sequence which I am trying to Prefetch and do a camera track on. Somehow ...
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1answer
27 views

How can I set the camera parameters for 3d motion tracking footage?

I am trying to 3d motion track a scene from my Sony HDR-HC7e Camcorder. I know that he has a 1/2.9" ClearVid CMOS sensor in it but how do I get the horizontal sensor Size? and should I youse the ...
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0answers
14 views

Motion Tracking issues

I followed a CG matter tutorial for mocap and am having trouble making the results look good and natural. The cube doesn't fully follow the motion. Any help would be appreciated. Tutorial Blend File
2
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1answer
45 views

How to put rotation- and scale invariant labels to three dimensional objects (motion-tracked insert effect)?

I'm looking for an approach to introduce some informational objects to a 3D scene to be rendered. The effect is similar to motion-tracked inserts, you may know from various video productions. It would ...
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0answers
13 views

I'm getting a distortioned weird effect when ''Setting up the tracking scene'' in my movie clip editor [duplicate]

Whenever I look into my 3d viewport through my camera I see this weird effects, how do I get rid of them? My resolution matches the footage's
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32 views

Camera tracking scene misalignment during animation render

I am using camera tracking in Blender 2.8 to composite some bouncing balls onto a video background. I need the balls to disappear behind an object in the video (a plant), so I have created a second ...
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0answers
21 views

texture is fine in the material preview but is purple in the render mode

I was using April tools for tracking but the texture which I was thinking to extract by baking became purple but is fine in the material preview this problem is not there in eevee
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52 views

Boujou Tracking - FOV feels wrong

For the past few years, I've been tracking shots from Boujou to Blender, using Blender 2.49B to 2.9 (Thats one of the best, non-bugged ways to transfer tracks). Though, shots like this where the "...
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0answers
24 views

3d Camera Tilting when Camera Tracked [duplicate]

I tried to 3d camera track my footage in blender and my solve error was 1.1846 and I didn't think that was that bad. I set the lens to 14mm because that was the lens I was using with my Panasonic g7, ...
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1answer
44 views

Image Stretching as result of 3d tracking

When I do a camera track and set up a tracking scene, stretching appears in the image in the compostitor. Why? Also, an "Unsistortion" node has appeared in the compositor making the ...
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1answer
76 views

Motion track while knowing distance between points

Is there a way to 3D track points while knowing the distance between them? Example: I track nine points in a grid like this: . . . . . . . . . The distance between ...

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