Multiple display for webcam device

[SouL-H]

Your environment.

• Version: v0.4.0
• Browser: Chrome Version 114.0.5735.106
• Other Information: Apple Mac Mini M1 - Arm64 , another test device: Orange Pi - Ubuntu 20.04 LTS

What did you do?

I wanted to display the webcam camera image connected to my computer on an html page.

What did you expect?

I wanted to display the webcam image on the html page and completed it successfully. But things started when I made a request to the same link from a different tab.

What happened?

When I made a second request I got an "invalid state: driver is already opened" error.

Here is the code where I got the error;

    mediaStream, err := mediadevices.GetUserMedia(mediadevices.MediaStreamConstraints{
        Video: func(constraint *mediadevices.MediaTrackConstraints) {
            constraint.Width = prop.Int(600)
            constraint.Height = prop.Int(400)
        },
    })
    if err != nil {
        panic(err)
    }

Is there a function available for multiviewing or how can I solve this error?

[bazile-clyde]

Are you asking if you can open a device and stream images in two separate processes? Linux only allows one process to open and use a device driver at a time. There are exceptions: you can query a driver's device capabilities while another process is streaming images from that same driver. But you can not stream from two separate processes.

[bazile-clyde]

@SouL-H Closing for now. Feel free to reopen if this is still an issue or if I misread your question.