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Blender 3.0 for Production - 2D & 3D Tracking Workflow - 08 Fundamentals of 3D Camera Tracking 

pixeltrain - 3D & VFX Trainings
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In this tutorial series, we will talk about Blender as a solution for 3D Camera and Object Tracking. Step by Step you will learn how to use Blender for preparing your footage in the Video Sequence Editor (VSE) and getting used to the Movie Clip Editor. Then we will cover the important fundamentals of 2D-Tracking in Blender and also some use-cases for directly using these data. Then we build upon these 2D-Tracks and start solving a 3D-Camera and talk about good and bad tracks, nodal shots, tricks like offset-tracking, joining of tracks, and analyzing solve problems. In the final tutorials, we will finish with Object-tracking for props replacement. After this tutorial series, you have a solid understanding of Blender's Camera and Object Tracking and how to use the solved data inside of Blender or in other applications like Maya, Cinema, or Houdini.
If you have questions or topics, which should be added, please let me know.
If you want to support me for publishing more free tutorials you could join my Patreons:
👉 / pixeltrain3d
or give me a fast Coffee time Tip:
👉 PayPal: paypal.me/pixeltrain
Want to start learning Blender Fundamentals with Helge?
👉 • Publication Trailer - ...
These topics are covered in this tutorial:
Loading 2 Frames as Image Sequence
Purpose of Camera Tracking
Needs for 3D-Object integration
Understanding Parallax & Photogrammetry
Solving process & Keyframes
Stereo Photogrammetry
Rules for valid trackers
Good trackers, bad trackers
Tracking two images
Setting the best Keyframes
Solve Camera Motion
Understanding the Solve Error
2D Trackers vs. 3D Markers
Average Error and Reprojection Error
Camera Constraints
Camera Solver Constraint
Add the Plate into the Camera Background
Display overlays for Motion Tracking
Limitations of a Solver (Size and Orientation)
Manual Orientation of the scene
Understanding the Orientation functions
Floor and Origin
Setting axes
Set the scene scale from reference
Camera Settings
Backsize and Focal Length
Setting Camera Settings for the Solve
Searching the right Focal Length
Refine Mode for Focal Length
Finding the right settings
If you want to use the same footage, here is my Gumroad link:
pixeltrain3d.gumroad.com/l/GEdjT
Be aware, that these files are included in my Patreon ;-)
/ pixeltrain3d
This tutorial series „Blender for Production“ focuses on Blender as a full Production Suite for (Indie) 3D- & VFX Productions. In these tutorials, I will explain how to work with the different Modules of Blender and how they are connected. I will give you an introduction to the specific functionalities, but also the production context and workflows, which can help you to use Blender in your productions.
As a Senior 3D & VFX Trainer, Helge Maus teaches 3D- & VFX Applications for 20 years. His focus lies on VFX, but he also works with many studios and agencies from different visualization areas. He focuses on Houdini FX, Blender, and NUKE for his daily work and training.
If you have questions or topics, which should be added, please let me know.
If you want to support me for publishing more free tutorials you could join my Patreons:
/ pixeltrain3d
or give me a fast Coffee time Tip on
PayPal: paypal.me/pixeltrain
Find more information on www.pixeltrain.net
RU-vid: / pixeltrain3dvfxtrainings
Twitter: / pixeltrain
Mastodon: mastodon.art/web/@pixeltrain3d
Instagram: / pixeltrain3d
LinkedIn: / pixeltrain
Artstation: www.artstation.com/pixeltrain

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18 янв 2022

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Комментарии : 20   
@ppsystems4317
@ppsystems4317 2 года назад
this is again very usefull and a very good detailled explanation. Well done !
@maximoremedios
@maximoremedios Год назад
Fantastic series of tutorials, many thanks. Can you extract lens distortion from a lens grid shot on set in Blender ?
@MADAMOTION
@MADAMOTION 2 года назад
Great tut as always! Maybe you have a Solution for me, the only time Blender can‘t figure out the Camera Motion is when i do a clean Orbit with a drone and Point of interest. The solve works only for half of the shot. When i do the Same Shot in syntheyes test Version it works instand. Hope you understand my english, greetings from germany ✌️
@pixeltrain3d
@pixeltrain3d 2 года назад
You mean you fly arround an object (point of interest), right. Not you are spinning the camera around (nodal shot?) ? If you set good keyframes but hand Blender should solve that. But all trackers I know will generate a slight spiral instead of a perfect circle if you fly arounda point. But it should be solveable. I will try next week and compare it with Syntheyes and NUKE. Viele Grüße :-)
@MADAMOTION
@MADAMOTION 2 года назад
​@@pixeltrain3d Thanks for your quick reply, yea exactly I flew around an object. It would be awesome if you could try it yourself, I searched in every corner of the web but couldn't find a solution (for blender). But an important information, I flew in a very close range (approx 15-20m radius) around a person a full 360°. In a far distance around a building for example it is no problem to solve a shot. Grüße zurück :)
@cristians4
@cristians4 2 года назад
If I have two cameras fixed and I have an object that moves, for instance a small car moving in the scene with an attached marker (lets say an ArUco marker or similar), is it possible to retrieve its 3D coordinates based on a reference system ?. I mean the x,y,z position of this marker at each frame ?. I did something for a 2D sequence (x,y coordinates), however I would like to do something similar for a 3D situation.
@pixeltrain3d
@pixeltrain3d 2 года назад
Yes, you can get the 3D-Coordinates of this market BUT the problem is, that a camera tracker has no clue about your reference system, scene size and orientation until you set this with the scene reconstruction. So you should have the same origine in both scenes, and some more points you can use for floor, scale and axis. They have to be the same in both scenes.
@shuajackson615
@shuajackson615 2 года назад
The empties don't automatically appear as they do for you in 22:48. Any idea how to get them to show up? (Solve error of only 0.25)
@pixeltrain3d
@pixeltrain3d 2 года назад
Please look into the modifiers on you camera. Is there a Camera Solver Modifier? If yes check your Viewport Overlayes (top of the viewport) and look if "Motion Tracking" is active.
@antonios5572
@antonios5572 2 года назад
if you know both sensor size and focal length, its a good thing let "refine focal" still on?
@pixeltrain3d
@pixeltrain3d 2 года назад
If you are really sure about both settings you can use these values directly in the camera settings on the right. You will see that refine focal will not change the result, so don't use it. A bad tracker will otherwise change your focal length which will make your solve more bad.
@moranjackson7662
@moranjackson7662 2 года назад
*Sigh* I try do do this but it seams my footage is too bad... I have an Average error anywhere between 1 and 150. The footage is blurry and if I try to solve, the ticks in the camera are all over the place. I'm tracking 700 Frames with auto track and I let blender find the tracking points. Then again, it is a right to left pan oin a tripod. (Tripod Settings make it a bit better but not good and it is totally different.) Any ideas what I can do to refine this? Or is it in one of the following videos? I skimmed them, but didn't find anything.
@pixeltrain3d
@pixeltrain3d 2 года назад
Hi Moran, are you sure it is not a standard Nodal Shot? Sounds like that. So, please learn about solving Nodalshots in Lesson 12. But all my videos are building on each other, so if you really want to understand the problems in your shot, watch them in order. I know, it's much stuff, but making vfx is craft ;-) In long shots there are often mixures of Normal shots with paralax and nodal parts. Some times you have to split them to solve.
@moranjackson7662
@moranjackson7662 2 года назад
@@pixeltrain3d thanks for the answer. I will study your videos. The original shot is a 180° pan, but I just use a 100° piece of it. I'll get back to you, when I finished the videos 😃
@asthalis
@asthalis 2 года назад
This could have been very interesting, but the video resolution is only 360p... bad choice or upload problem ?
@pixeltrain3d
@pixeltrain3d 2 года назад
At my side it plays in 1080p. Tested it also now with another account, plays in 1080p. Maybe a setting in your player? Strange ...
@asthalis
@asthalis 2 года назад
@@pixeltrain3d strange... it seems all is alright again, maybe a bug in Chrome. Sorry for this !
@johntnguyen1976
@johntnguyen1976 2 года назад
Mine went to 1080p right away 🤷.
@MADAMOTION
@MADAMOTION 2 года назад
It takes some time after the Upload till the full res is availble.
@robinsquares
@robinsquares 2 года назад
@@pixeltrain3d If you're quick enough to play the video after it's uploaded, you won't get max quality. There seems to be a lag somewhere in the RU-vid system, where they try to get the low-res version out first. :)
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