Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

VideoStream works in Jupyter Notebook but fails in Jupyter Lab

See original GitHub issue

Running some very simple code to play a video seems to behave differently between Jupyter Notebook (shows an image) and Jupyter Lab (shows the object string representation). Both are running on the same Raspberry Pi on the local network. Indeed, it’s the same instance of Jupyter, just two different endpoints.

from ipywebrtc import VideoStream
VideoStream.from_file('vid.mp4')

Jupyter Notebook:

JupyterLab:

Issue Analytics

State:
Created 3 years ago
Comments:8 (4 by maintainers)

Top GitHub Comments

1reaction

jasongroutcommented, Apr 6, 2020

Ah, it looks like ipywebrtc does not support JupyterLab 2.0 yet: https://github.com/maartenbreddels/ipywebrtc/pull/74

0reactions

matburnhamcommented, Apr 7, 2020

Ah, thanks. I thought it was just me being dumb! I’ll stick to Jupyter Notebok for the time being then.

For completeness, although irrelevant now:

What does jupyter labextension list give?

$ jupyter labextension list
JupyterLab v2.0.1
Known labextensions:
   app dir: /home/pi/.virtualenvs/cv/share/jupyter/lab
        @jupyter-widgets/jupyterlab-manager v2.0.0  enabled  OK
        jupyter-webrtc v0.5.0  enabled  OK