Image corrupted

[Dontmindmes]

Image file size is 0

[SaturnsVoid]

Hmm works fine for me, can you run this command in Powershell and tell me if it lists your webcam?

Get-WmiObject -Class Win32_PnPEntity | Where-Object {$_.PNPClass -Match "Image"} | Select-Object Name

[Dontmindmes]

nope nothing shows up for me when i run it

[SaturnsVoid]

nope nothing shows up for me when i run it

Then for some reason your computer isn't seeing the Camera...

[nileshdpatil]

same issue with me

[Caterpillar-cmd]

Hello! The image saved is only 3kb and complete black pixels. My webcam has a led and the led turned on, showing that the camera was called, therefore I suggest the the issue is in the saving image command.

[Caterpillar-cmd]

Below some output that can maybe help to find the issue root;

Camera: &{0xc0000e0780}
bytes.Buffer:
clip: �PNG
�
�0İ�'��@���ɟ����Wr��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'���+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r��+'�r���%IEND�B`��0���\!��

func CaptureWebcam() {
	var name = "WebcamCapture"
	handle, _, _ := proccapCreateCaptureWindowA.Call(uintptr(unsafe.Pointer(&name)), 0, 0, 0, 320, 240, 0, 0)
	procSendMessageA.Call(handle, 0x40A, 0, 0)  //WM_CAP_DRIVER_CONNECT
	procSendMessageA.Call(handle, 0x432, 30, 0) //WM_CAP_SET_PREVIEW
	procSendMessageA.Call(handle, 0x43C, 0, 0)  //WM_CAP_GRAB_FRAME
	procSendMessageA.Call(handle, 0x41E, 0, 0)  //WM_CAP_EDIT_COPY
	procSendMessageA.Call(handle, 0x40B, 0, 0)  //WM_CAP_DRIVER_DISCONNECT
	camera, err := os.Create("Image.png")
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println("Camera:", camera)

	clip, err := readClipboard()
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println("clip:", clip)
	_, err = io.Copy(camera, clip)
	if err != nil {
		fmt.Println(err)
		return
	}
	camera.Close()
}

func readClipboard() (io.Reader, error) {
	f, err := ioutil.TempFile("", "")
	if err != nil {
		fmt.Println(err)
		return nil, err
	}
	f.Close()
	_, err = exec.Command("PowerShell", "-Command", "Add-Type", "-AssemblyName", fmt.Sprintf("System.Windows.Forms;$clip=[Windows.Forms.Clipboard]::GetImage();if ($clip -ne $null) { $clip.Save('%s') };", f.Name())).CombinedOutput()
	if err != nil {
		fmt.Println(err)
		return nil, err
	}

	r := new(bytes.Buffer)
	fmt.Println("bytes.Buffer:", r)
	file, err := os.Open(f.Name())
	if err != nil {
		fmt.Println(err)
		return nil, err
	}
	if _, err := io.Copy(r, file); err != nil {
		fmt.Println(err)
		return nil, err
	}
	file.Close()
	os.Remove(f.Name())
	return r, nil
}

[ariary]

nope nothing shows up for me when i run it

Then for some reason your computer isn't seeing the Camera...

Camera can also be retrieved with Get-CimInstance Win32_PnPEntity | where caption -match 'camera' | Select-Object Name

Same issue with a corrupted image, and led turned on, showing that the camera was called

(with my windows 11 device. But it's work with my windows 10 one... maybe correlated)

[Wiibleyde]

Same issue, my image is corrupted...
(But the command work for me, it detect my webcam)