public override async Task StartAsync(CancellationToken cancellationToken)
{
try
{
string[] devices = WindowsCapture.FindDevices();
if (devices.Length == 0)
{
ErrorOccurred?.Invoke(this, new NotSupportedException("Could not open camera."));
}
WindowsCapture.VideoFormat[] formats = WindowsCapture.GetVideoFormat(DefaultCameraId);
Decoder = new();
Camera = new(DefaultCameraId, formats[0]);
void DoStuff()
{
var image = this.FindControl <Image>("Preview");
// [How to use]
// check USB camera is available.
string[] devices = WindowsCapture.FindDevices();
if (devices.Length == 0)
{
return; // no camera.
}
// check format.
int cameraIndex = 0;
WindowsCapture.VideoFormat[] formats = WindowsCapture.GetVideoFormat(cameraIndex);
for (int i = 0; i < formats.Length; i++)
{
Console.WriteLine("{0}:{1}", i, formats[i]);
}
// create usb camera and start.
var camera = new WindowsCapture(cameraIndex, formats[0]);
camera.Start();
// get image.
// Immediately after starting the USB camera,
// GetBitmap() fails because image buffer is not prepared yet.
var bmp = camera.GetBitmap();
//// show image in PictureBox.
var timer = new System.Timers.Timer(100);
timer.Elapsed += (s, ev) =>
{
Dispatcher.UIThread.InvokeAsync(() =>
{
if (image is not null)
{
image.Source = camera.GetBitmap();
}
});
};
timer.Start();
}
public override async Task StartAsync(CancellationToken cancellationToken)
{
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
throw new InvalidOperationException("OS not supported.");
}
try
{
string[] devices = WindowsCapture.FindDevices();
if (devices.Length == 0)
{
ErrorOccurred?.Invoke(this, new NotSupportedException("Could not open camera."));
}
WindowsCapture.VideoFormat[] formats = WindowsCapture.GetVideoFormat(DefaultCameraId);
Decoder = new();
Camera = new(DefaultCameraId, formats[0]);