Enumerate and select video capture devices

Products: Video Capture SDK .Net

Engines: VideoCaptureCore, VideoCaptureCoreX

Video Capture SDK .Net can use any video capture device supported by OS. The code sample shows you how to list available video capture devices and choose one of them.

Enumerate video capture devices

Sample code to enumerate video capture devices and add them to a combobox:

VideoCaptureCore

foreach (var device in VideoCapture1.Video_CaptureDevices())
{
    cbVideoInputDevice.Items.Add(device.Name);
}

VideoCaptureCoreX

var devices = DeviceEnumerator.Shared.VideoSourcesAsync();
foreach (var device in await devices)
{
    cbVideoInputDevice.Items.Add(device.DisplayName);
}

Enumerate available video formats and frame rates

After getting the device name, you can enumerate available video formats and frame rates:

VideoCaptureCore

// Find device by name
var deviceItem = VideoCapture1.Video_CaptureDevices().FirstOrDefault(device => device.Name == "Some device name");

// Enumerate video formats
foreach (var format in deviceItem.VideoFormats)
{
    cbVideoInputFormat.Items.Add(format);

    // Enumerate frame rates for a specified format
    foreach (var frameRate in format.FrameRates)
    {
        cbVideoInputFrameRate.Items.Add(frameRate.ToString(CultureInfo.CurrentCulture));
    }
}

VideoCaptureCoreX

// Find device by name
var deviceItem = (await DeviceEnumerator.Shared.VideoSourcesAsync()).FirstOrDefault(device => device.DisplayName == "Some device name");
foreach (var format in deviceItem.VideoFormats)
{
    // Add the format to the combobox
    cbVideoInputFormat.Items.Add(format.Name);

    foreach (var frameRate in format.FrameRateList)
    {
        // Add the frame rate to the combobox
        cbVideoInputFrameRate.Items.Add(frameRate.ToString());
    }
}

Set the video capture device as a source

VideoCaptureCore

// Find the device by name
var deviceItem = VideoCapture1.Video_CaptureDevices().FirstOrDefault(device => device.Name == "Some device name");

// Create the video capture device
VideoCapture1.Video_CaptureDevice = new VideoCaptureSource(deviceItem.Name);

// Set the default format and frame rate
VideoCapture1.Video_CaptureDevice.Format = deviceItem.VideoFormats[0].ToString();
VideoCapture1.Video_CaptureDevice.FrameRate = deviceItem.VideoFormats[0].FrameRates[0];

Use the VideoPreview or VideoCapture mode to preview or capture video from the device.

VideoCaptureCoreX

// Define the video capture device source settings
VideoCaptureDeviceSourceSettings videoSourceSettings = null;

// Find the device by name
var device = (await DeviceEnumerator.Shared.VideoSourcesAsync()).FirstOrDefault(x => x.DisplayName == deviceName);
if (device != null)
{
    // Find the format by name
    var formatItem = device.VideoFormats.FirstOrDefault(x => x.Name == format);
    if (formatItem != null)
    {
        // Create the video capture device source settings
        videoSourceSettings = new VideoCaptureDeviceSourceSettings(device)
        {
            Format = formatItem.ToFormat()
        };

        // Set the frame rate
        videoSourceSettings.Format.FrameRate = new VideoFrameRate(Convert.ToDouble(cbVideoInputFrameRate.Text));
    }
}

// Set the video source
VideoCapture1.Video_Source = videoSourceSettings;

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