public bool Start(int DeviceNo)
{
try {
FilterInfoCollection videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
MonikerString = videoDevices[DeviceNo].MonikerString;
_videoSource = new VideoCaptureDevice(MonikerString);
VideoSource = new MyAsyncVideoSource(_videoSource, true);
//SetMaxResolution();
VideoSource.NewFrame += NewFrame;
VideoSource.Start();
FrameNumber = 0;
// measure range
int min, max, step, def;
CameraControlFlags ccflags;
VideoProcAmpFlags vpflags;
_videoSource.GetCameraPropertyRange(CameraControlProperty.Exposure, out min, out max, out step, out def, out ccflags);
ExposureRange = String.Format("{0} to {1})", min, max, step);
_videoSource.GetVideoPropertyRange(VideoProcAmpProperty.Brightness, out min, out max, out step, out def, out vpflags);
BrightnessRange = String.Format("{0} to {1})", min, max, step);
timer.Elapsed += delegate {
FPSReceived = VideoSource.FramesReceived;
FPSProcessed = VideoSource.FramesProcessed;
};
timer.Start();
return(VideoSource.IsRunning);
} catch {
return(false);
}
}
private static CameraProperty ReadProperty(VideoCaptureDevice device, VideoProcAmpProperty property)
{
CameraProperty p = new CameraProperty();
p.Identifier = property.ToString();
p.Specific = "VideoProcAmp";
p.ReadOnly = false;
p.Type = CameraPropertyType.Integer;
p.Representation = CameraPropertyRepresentation.LinearSlider;
p.CanBeAutomatic = true;
try
{
int min;
int max;
int step;
int defaultValue;
VideoProcAmpFlags flags;
bool success = device.GetVideoPropertyRange(property, out min, out max, out step, out defaultValue, out flags);
if (!success)
{
p.Supported = false;
}
else
{
p.Supported = true;
p.Minimum = min.ToString(CultureInfo.InvariantCulture);
p.Maximum = max.ToString(CultureInfo.InvariantCulture);
int currentValue;
success = device.GetVideoProperty(property, out currentValue, out flags);
if (!success)
{
p.Supported = false;
}
else
{
p.CurrentValue = currentValue.ToString(CultureInfo.InvariantCulture);
p.Automatic = flags == VideoProcAmpFlags.Auto;
}
}
}
catch
{
p.Supported = false;
}
return(p);
}
