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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19 views

Green Screen tracking marker crunch?

So I found a website that provides practice green screen plates for you to work with, they also provide some general tips on what you can do to track the shot effectively. However im just getting into ...
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15 views

How to add CGI characters in a shaky video? [closed]

How to add CGI characters in a shaky video? Is there a possible way of doing it with motion tracking??
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32 views

Use real object tracking data from a video to move a virtual object in 3D space

I used "Tracking" to track an object(an airplane) recorded by a steady camera, pointed to the sky of an aviation show. I want to connect a blender camera to to the tracked object to see what ...
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21 views

Scene disappears when I set origin in camera tracking

I have a video that I applied camera tracking to, i.e. added the markers and solved. I get a nice solve error of 0.22. The I try to set origin to the scene. The camera then completely disappears and ...
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10 views

Why blender tracker filter not working as intended?

I set filter value to 1.73, but some markers which is less than 1.73 are being filtered out, what I think it should do is to set a error value, and it should filter out anything that has error value ...
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10 views

Why don't need 8 common trackers throughout the whole video when doing camera solving?

I'm curious about this feature, 8 common trackers to solve the camera, examples like the key frame range in the left sidebar when doing motion tracking, how blender can solve the other part of the ...
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27 views

Camera solve, align the 3D space with the footage

I'm adding the 3D object into the footage I shoot, after camera solving I got error 0.28px which is pretty good, then I want to check if the angle is correctly aligned with my footage so I put a long ...
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10 views

Tracking out of the sequence?

I'll try to track the corners to replace the sign but the lower corners disappear. It's possible to make the tracker calculate a rute or I only could make it frame by frame?.
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12 views

Trackers don't line up with tracking

i'm making a vfx project in blender and with a solve error of only 0.28px the trackers don't line up with the tracking dots in the viewport. here's an example-
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45 views

How do I track the camera while knowing the specs of the camera?

I'm currently tracking footage filmed on a Mavic Pro drone camera. I have all of the specs of the camera, but I'm not sure how to include it into my track. It's also an extremely easy track because ...
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15 views

I have a weight painting issue

i need help 😢 whenever i adjust the weight of bone 39 it increases/decreases the weight of some other bone eg bone 35, and if i adjust the weight of bone 35 it does the same for bone 39. this issue ...
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12 views

3d tracking vertical video not working

For some reason I cannot 3d track footage in blender that is shot vertically (1080x1920). I had an idea to rotate the video to landscape (1920x1080) and see what happens. Sure enough, it tracks ...
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18 views

Motion Tracking Detect features not detecting enough

so i track alot of shots in blender's motion tracker. sometimes I'm abit confused I used detect features alot, but on some of the shots when i use it, not alot of tracks are produced / spawned. even ...
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27 views

solve error low, but 3D markers very far away from where they should be

So i'm trying to track this synthetic image sequence and solve error is very low, but 3D markers are very far from where they should be (both red dots in clip view and those thingies that look like ...
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1answer
14 views

combining motion tracking with footage

Hi guys I want to combine a 3d motion-tracked object with some footage I plan to shoot. -I want to film someone walking "infront and around" the 3d tracked object. -Any ideas on how I can ...
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16 views

Make image overlay only visible while marker from 2D stabilization is visible/active?

I followed this tutorial to overlay an object in a video clip with an image using motion tracking and reverse 2D stabilization, which worked just fine. However, the image is visible throughout the ...
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21 views

Parallel walls are not parallel after solving

I'm tracking street scene, but after solving I have set of points which should be parallel but they are not. Focal length and sensor size were set correctly, but even if I change them manually point ...
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1answer
56 views

Movie clip is stabilized in preview, but not in render

I have a movie which I want to stabilize. After I open the movie in the movie clip editor, insert the marker, track it, enable the stabilization 2D, and view the stabilized result the movie clip looks ...
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13 views

How to modify Tracking Dopesheet selection from Python?

I have written a motion tracking add-on for Blender 2.93.1. Now, when users click the badness-rated tracks in my list, I want to (from Python) select the clicked track in the Tracking Dopesheet editor ...
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20 views

How do I append camera with camera track animation

I want to append the camera that had animation on it (because of a 3D camera track) to a fresh 3D scene. How do I do this? When I append the camera into the new scene, it has no animation.
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27 views

remove unwanted colorseams on masked region in planetrack

I mostly find solutions to my little blender problems by watching videos and reading tutorials. This time, I don't get it, so, hopefully someone can give me some hints on how to solve my problem: I ...
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22 views

Determination the K-parameters for the distortion automatically

Something similar was ask here but I would like to know if it is possible to know with Blender automatically the distortion parameters? I have this picture and I would like to know if Blender can ...
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1answer
15 views

Do I have to move a tracking dot for each frame?

I have recently started using Blenders Motion Tracking. Sometimes one tracking dot is in the incorrect position for many frames, even though the camera doesn't move at that point. Do I need to move it ...
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13 views

Camera solve on video game footage has wrong focal length (solve error 0.82 px)

When I solve camera motion in my video game footage, blender makes the camera's focal length and location wrong, but the solve error is 0.82 px, I do not know how to fix this and tried changing ...
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5 views

Tracking camera motion of a top down shot footage [duplicate]

I've tried multiple times but didn't get any satisfactory results. Is it because I had tracking points on the ground only i.e. only on one plane. Can someone explain what might be the reason
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1answer
40 views

3d object created from motion trackers is rotating the opposite direction; how to correct?

It's my first attempt to use motion tracking and the VSE in Blender; I decided to use a clip from a movie to mess around with and try to get the hang of it. I think I am getting very close to ...
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53 views

CGMatter Facial motion capture tutorial - script error

I am working on the facial animation following the cgmatters tutorial: https://youtu.be/uNK8S19OSmA Everything works fine except script from the end of the video. I have more than 200 trackers so im ...
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34 views

Camera solve in Blender: are empties supposed to be stationary in 3d-view?

I have a 15 seconds long recording where the camera moves up and down, and comes closer to, and further from, the object being filmed. I have taken care to include easily tracked markers in the frame. ...
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22 views

How do I attach an object to specific trackers?

I have been sitting and trying to solve these problems for ~6 hours, but to no avail. I tracked my image sequence with the default Detect Features button and added my own trackers, but object in my ...
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1answer
11 views

Using camera animation as base for motion tracking solve

I'm wondering if it's possible to use a camera animation (FBX or alembic) as the starting point for the motion tracking solve in Blender? I'm using a method of tracking a camera live but the data it ...
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16 views

why can't blender solve camera motion if the footage is shot on android?

I shot footage on my Lg android device and blender is saying that there are most likely no good key frames. what do I do?
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17 views

Can you set a motion tracker as an empty? [duplicate]

I'm trying to make an object follow a path from a recording, and I'd like to do it with the motion tracker. I'm not trying to solve camera motion, just the object. I've got a tracker in the motion ...
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1answer
17 views

Tracking Issues

I've just started getting into camera tracking and ran into several issues. After detecting features, automatically laying more than 8 trackers, manually trimming and refining the focal length, I ...
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7 views

How can I camera track this scene better? [duplicate]

I have spent a while trying to track this shot. I am very new to blender camera tracking, though. Even though most of my trackers are doing a good job of staying on target, I am still getting large ...
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8 views

Detect and Track Features from Frame 1 using Python [duplicate]

I am trying to detect and track markers in a clip, from the first frame forwards. I am using bpy.data.scenes["Scene"].frame_current = 1 to set the clip to ...
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1answer
26 views

Why does Blender's tracker keep changing my focal length?

I've been trying to track a shot in Blender that I'm adding VFX to. The footage was shot on a 35mm lens on a tripod with a loose head. Because the shot only moves a small amount, the track points are ...
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14 views

No shaders or lighting appearing in render view after camera tracking

Finally got done tracking my camera, but now I can't get any of the objects in my scene to take on shader properties. I've Tried changing the shader settings on the object and adding a light right ...
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11 views

Tracking Szene not matching tracked video

Very low tracking error, focal length is matching, ... I used Set as Background and Setup Tracking Scene to create the scene. Empties from the trackers move right but don't match the video in position....
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11 views

Reprojected Tracking Points are way of

My blend file: https://drive.google.com/file/d/1mG5tCoFMPHcWtXTJOfIQ25bgo0iGlGHR/view?usp=sharing (It should also have the vid included) I got a Solve Error of 0.96 which is not great but its at least ...
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14 views

Way to high Solve Error or it is not accurate with the refined trackers

Blend file I tracked the thing and I do not think, that I tracked it so badly that the solve error should be 255.86. And before I wanted to change some things I had a Solve Error of about 1.03 but in ...
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1answer
16 views

Frames Shown in Movie Editor>Mask Mode does not Match Frames Shown in Compositor

I've been tracking some footage for a project, and wanted to mask out some of the tracking markers I placed in the area I filmed. The first tracking marker worked fine in regard to masking, but for ...
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18 views

What I should put on Sensor Width when I tracking the Camera?

I am tracking the camera on a scene but I don't know which is the Sensor Width. I recorded the scene with a Xiaomi Redmi Note 9 Pro, but when I search about cellphone's sensor width; it give that the ...
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21 views

Which keyframes A and B should I pick when tracking a circular motion?

I'm trying to track a videoclip where the camera moves around an object M in a circular motion. I added a picture to make it clear what I mean. Since the camera is constantly turning, and tracking ...
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1answer
5 views

Issue with parenting tracked nulls to get Orientation for mesh

I am currently trying to figure out how to get the data that has been tracked from a footage. I need to track an arm in order to get the movement and replace it with a mesh (that has no hand). After ...
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1answer
63 views

How to get the updated rotation of an object during soft body physics simulation?

I am trying to get the updated rotation of an object during simulation in Blender 2.92. However, I am not able to get what I want. I appreciate if someone can help me with this. As you may know, you ...
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120 views

Which 3 points are best to get a good floor? (Motion tracking)

When I set the floor of my tracking scene, I have to select 3 points to use. However, I noticed that the orientation changes depending on which 3 points I pick. I always thought it didn't matter. But ...
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1answer
219 views

What is the sensor width of an iPhone 11? I need it for motion tracking [closed]

I recently filmed a video with the iPhone 11 and I'm having trouble finding the sensor width needed for motion tracking. I have found online it uses a 1/2.55 sensor width which blender actually offers ...
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21 views

Export tracking markers - Python

I'm trying to create mesh on tracking markers with python by this code: Exporting camera tracking markers from Blender However I'm still getting error: Line 19, in execute TypeError: Element-wise ...
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17 views

Why is my background video in the animation panel slowed down/lower frame rate than in the motion tracking panel?

So I added my image sequence into the motion tracking panel, it's 561 frames and looks good when I play it. When I set this video as the background and look at it through the camera in the animation ...
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23 views

Is it possible to keyframe the camera by hand instead of motion tracking?

I’ve been trying to track a complicated clip for a few days already but just can’t get it to track properly. Would it be possible to set the clip as the background and keyframe the camera by hand? ...

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