Video

How to capture videos!

Install Urchin

Urchin is a Python package stored on PyPI, the following code needs to be run the first time you use Urchin in a Python environment.

Urchin’s full documentation can be found on our website.

!pip install oursin -U

Setup Urchin and open the renderer webpage

By default Urchin opens the 3D renderer in a webpage. Make sure pop-ups are enabled, or the page won’t open properly. You can also open the renderer site yourself by replacing [ID here] with the ID that is output by the call to .setup() at https://data.virtualbrainlab.org/Urchin/?ID=[ID here]

Note that Urchin communicates to the renderer webpage through an internet connection, we don’t currently support offline use (we hope to add support in the future).

import oursin as urchin
urchin.setup()

Capturing videos

Urchin’s current video capture system is a bit janky, but it does work. Basically, we’re just going to capture repeated screenshots over and over and tack them all together into a video.

For now we only support simple animations where you rotate around a single axis.

await urchin.camera.main.capture_video('output.mp4', start_rotation=[22.5, 22.5, 225], end_rotation=[22.5, 22.5, 0], size=(600,400))