[desktop] Video recording is not working

nishiokas

Hello there.
I'd like to video recording with usb camera on qml application for linux.
I use "QML Camera Example declarative-camera".
https://doc.qt.io/qt-5/qtmultimedia-multimedia-declarative-camera-example.html

CameraButton {
    text: "Record"
    onClicked: camera.videoRecorder.record()
}

when I clicked "Record" button then I can see error message on Qt creator's application output window.
CameraBin error: "Device '/dev/video0' is busy"
CameraBin error: "Internal data flow error."
Next I clicked "Stop" button then clicked "Record" button again.
I can see it.
CameraBin warning: "Can't record audio fast enough"
I don't know how to do but sometome I can see it.
** (declarative-camera:439): CRITICAL **: No headers or buffers on pad muxer:video_941036892

I wonder if I have to change setting on linux or something?

Thanks for any advice.

SGaist

Hi and welcome to devnet,

Please add more details to your post like Qt version, Linux distribution version, device you are using, your computer specs, etc.

nishiokas

@SGaist
thanks for reply!

more details.
・Qt varsion 5.9.1( I tried 5.7.0 but same)
・board Colibri iMX6
・Linux Kernel　4.1.39
・USB camera

run the program on board.

thanks.

SGaist

Is there anything else also accessing /dev/video0 beside your application ?