Webcam detection

[vicdoval]

I had to change computer and I'm back to position one. I can not acces the webcam. The video capture example shows a black input. Not error reported to the console.
The computer has Linux Mint 21.3 and the camera is working with Processing 4
Any idea?

[neilcsmith-net]

Possibly try changing the device from default to 1. Or the reverse if you've changed it already. This is probably some weird interaction between GStreamer's autovideosrc and PipeWire. Changing the device should make it use the same pipeline as Processing. The Processing video library is using the same binding library developed for PraxisLIVE, so if it works in one it should be possible to make it work in the other.

[vicdoval]

That did the change! Thank you!!
I had tried but during runtime without succes. Changing the device during runtime results on the mentioned blackscreen. it has to be done before hitting Play

[neilcsmith-net]

You should be able to hit play on the capture node at any time after changing the device while the whole patch is running. It deliberately stops when changing device. However, I've noticed that sometimes GStreamer locks up with PipeWire, which can then stop further calls into GStreamer from functioning correctly. If I'm not mistaken, Mint 21.3 is based on Ubuntu 22.04, which is my own primary OS, and where I've seen this problem. It might be it's now fixed in later versions of Ubuntu and/or GStreamer.