Upgrade to 2.8x required in Preferences / Add-ons panel

[Rustmonger]

I have Blender 2.80 installed, I downloaded the add-on from
https://github.com/mrossini-ethz/camera-calibration-pvr/tree/blender-2.8
installed it through Blender 2.80 and when I go into the add-ons panel under preferences it has a little exclamation point in a triangle and says

"upgrade to 2.8x required"

Any workaround? I would love to get this working. Thanks!

[schroef]

For me on OSX it doesnt work when using the zip, thats due to the point in the zip and folder name. When i changed the folder to "camera-calibration-pvr-blender-28", it does work and works just fine.

PS you sure you used the 2.8 branch?
Make sure you check the branch drop-down menu and select the blender 2.8 branch, then download the zip. Remember to rename the folder, other wise it wont show.

[enricoros]

Same issue here. Tried both blender 2.80 and 2.81 (Oct 29) on Linux x86_64.

[schroef]

Just check my post and read it. Then see how the folder is named on your OS. That helps ;)

[enricoros]

Instructions for getting this to work:

• clone the repository
• switch to the "blender-2.8" branch
• delete the outdated "camera-calibration-pvr.py" file, since it's still for blender 2.7 and confusing
• zip the folder (e.g. to camera-calibration-pvr.zip)
• Blender: Preferences > Addons > Install - point to the ZIP file, and activate
• there won't be any "upgrade to 2.8x required" message

To use the addon:

• Add > Image > Background, then pick a photo
• Add > Mesh > Plane
• Edit and drag each of the 4 vertices to the corner of a planar surface
• Properties > Scene > Camera Calibration PVR
• Camera Calibration PVR > Image: pick the background image element
• Select the plane (only)
• Camera Calibration PVR > Solve focal

Thanks to the author for this great addon!

[scurv]

I still can't get this thing to install.

[schroef]

Well without info or screenshots were looking for a Titanic

[asdzxcasd]

I figured out how to make it work.
zip-file must contain directory camera-calibration-pvr, and all files must be located in that directory, but not in zip-file itself. The issue is that different archievers can create zip-file with different structure. Also I had to remove everything related to the addon from ~/.config/blender/2.81/scripts/addons/ before installation.
It would be much more convenient if zip-file was released instead of making everyone to create it themselves.

[scurv]

I figured out how to make it work.
zip-file must contain directory camera-calibration-pvr, and all files must be located in that directory, but not in zip-file itself. The issue is that different archievers can create zip-file with different structure. Also I had to remove everything related to the addon from ~/.config/blender/2.81/scripts/addons/ before installation.
It would be much more convenient if zip-file was released instead of making everyone to create it themselves.

You are the awesome! I did the extract and renamed the camera-calibration-pvr blender-2.8 to camera-calibration-pvr and then cramed it back into a zip and it worked.

[ghost]

I figured out how to make it work.

Can somebody upload screenshot with folder structure? Or create filetree diagram using filetree.py:

• https://gist.github.com/azelpg/f7830159b612dd81478feaf7e5c2e9f7
  • http://azsky2.html.xdomain.jp/python/filetree.html

- ../blender/2.80/scripts/addons/
 ├ <subdir>
 │  ├ file1
 │  └ file2
 ├ file1
 ├ file2
 └ file3

[DreamsOf3DSpace]

Can confirm if you change the folder inside the zip to be named just "camera-calibration-pvr" it works but I was still confused where to find it for a while.

[Screenshot to help others]

[xan2622]

Thank you @asdzxcasd for this tip, it does fix the addon installation problem.

[mrossini-ethz]

Hello everyone, sorry for being inactive this whole time. I have created a copy of the blender-2.8 branch and named it blender-2-80 which has no "." in it. Also, I removed the legacy camera-calibration-pvr.py file. Could someone please check whether the install problems are eliminated now?

[xan2622]

Hi @mrossini-ethz

It seems to work fine now. 👍
No installation problem here with this camera-calibration-pvr-blender-2-80.zip file.

[arigoru]

I had no installation problems with 2-80 branch, but I could not get it to work properly. I drop background empty, add plane, adjust plane, select that plane and press "solve focal". It simply messes up current camera and creates new plane. After I adjust that, it creates another plane. If something about workflow changed, it seems that guide is outdated.
It just creates "Plane_Cal", then "Plane_Cal_Cal" and regardless of how i try to adjust them it never solves camera properly.

[jbmikk]

I tested this in blender 2.9 and managed to install it, although I still have to actually use it.
@mrossini-ethz if the camera-calibration-pvr.py file is legacy and was removed then the installation steps in the readme file should be updated accordingly right? At least in the blender-2-80 branch.

[sergeikrasnikov]

It seems to work with blender 2.92 (Linux)

git clone https://github.com/mrossini-ethz/camera-calibration-pvr.git
git checkout blender-2-80

I just copied the entire addon's dir to the blender's script dir (in my case ~/.config/blender/2.92/scripts/addons)
run blender
Edit->Preferences
typed in the search box: Camera
blender found "Camera: Camera calibration using ..."
checked box
That adds the additional menus at the Scene.Properties tab
it works!

Also you can run the addon via the blender's python console.
I renamed the addon dir (because python doesn't allow to use "-" in a module name)
"camera-calibration-pvr" to "camera_calibration_pvr"
then I opened the blender's tab "Scripting"
typed in "Python console":

import sys
#change the following path otherwise python couldn't find the addon's dir
sys.path.append("FULL/PATH/TO/ADDON/DIR")
import camera_calibration_pvr
camera_calibration_pvr.register()
#after that you should see the additional menus at the Scene.Properties tab 

Thank you, Marco Rossini!