FailedToFulfill

[vaqxai]

I'm trying to fetch one of the webcams available on my device, a usb webcam. Camera with index 0 works okay (laptop webcam) but the attached USB webcam which here shows up as index 5 (/dev/video5) doesn't seem to work. (Nor do the other devices which in other software either show up also as laptop webcam (index 1) or show a black image (2-4)

[2024-12-24T10:46:00Z INFO  magisterka] CI: [CameraInfo { human_name: "Integrated Camera: Integrated C", description: "Video4Linux Device @ /dev/video0", misc: "", index: Index(0) }, CameraInfo { human_name: "Integrated Camera: Integrated C", description: "Video4Linux Device @ /dev/video1", misc: "", index: Index(1) }, CameraInfo { human_name: "Integrated Camera: Integrated I", description: "Video4Linux Device @ /dev/video2", misc: "", index: Index(2) }, CameraInfo { human_name: "Integrated Camera: Integrated I", description: "Video4Linux Device @ /dev/video3", misc: "", index: Index(3) }, CameraInfo { human_name: "GENERAL WEBCAM: GENERAL WEBCAM", description: "Video4Linux Device @ /dev/video4", misc: "", index: Index(4) }, CameraInfo { human_name: "GENERAL WEBCAM: GENERAL WEBCAM", description: "Video4Linux Device @ /dev/video5", misc: "", index: Index(5) }]
[2024-12-24T10:46:00Z INFO  magisterka::webcam] IDX: Index(5)
thread 'main' panicked at src/main.rs:35:58:
called `Result::unwrap()` on an `Err` value: Could not get device property CameraFormat: Failed to Fufill
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

// in main.rs (line that causes the error - unwrap)
Self {
    webcam_handle: WebcamHandle::new(ci.index()).unwrap()
}
        
// in webcam.rs (the root cause, line with Camera::new)
pub fn new(idx: &CameraIndex) -> Result<Self> {

    info!("IDX: {:?}", idx);

    let reqfmt =
        RequestedFormat::new::<RgbFormat>(
            RequestedFormatType::AbsoluteHighestFrameRate
        );
    let mut cam = Camera::new(idx.clone(), reqfmt)?;

    info!("CAM: {:?}", cam.info());

    cam.open_stream()?;

    Ok(WebcamHandle {
        cam
    })
}