IsPreviewTapSupported Method (original) (raw)

Summary

Determines whether a specific preview tap for the preview source is available.

Syntax

Parameters

source
The preview source for which to determine whether a preview tap is supported.

tap
The preview tap type to check if it is supported or not.

Return Value

true if the preview tap is supported; false, otherwise.

Example

using Leadtools; using Leadtools.Multimedia; using LeadtoolsMultimediaExamples.Fixtures; public bool _result = false; public CaptureCtrlForm _form = new CaptureCtrlForm(); public void CapturePreviewExample() { // reference the capture control CaptureCtrl capturectrl = _form.CaptureCtrl; // output file for processor settings string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_IsModeAvailableExample.avi"); try { // try to find a USB camera if (capturectrl.VideoDevices["USB"] == null) throw new Exception("No USB video device available"); capturectrl.VideoDevices["USB"].Selected = true; // try to find a USB audio device if (capturectrl.AudioDevices["USB"] == null) throw new Exception("No USB audio device available"); capturectrl.AudioDevices["USB"].Selected = true; // set MPEG2 as the video compressor capturectrl.VideoCompressors.Mpeg2.Selected = true; // set AC3 as the audio compressor capturectrl.AudioCompressors.AC3.Selected = true; // set the target output file capturectrl.TargetFile = outFile; // set the target output format capturectrl.TargetFormat = TargetFormatType.AVI; // check whether we can capture video if (capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio)) { capturectrl.FrameRate = 5; // 5 frames per second capturectrl.UseFrameRate = true; capturectrl.TimeLimit = 10; // just 10 seconds of capture time capturectrl.UseTimeLimit = true; // check to see if we can preview compressed output if (capturectrl.IsPreviewTapSupported(CapturePreview.Video, CapturePreviewTap.Compressor)) { // enable preview capturectrl.Preview = true; // enable preview video capturectrl.PreviewSource = CapturePreview.Video; // set the preview tap location capturectrl.PreviewTap = CapturePreviewTap.Compressor; } // subscribe to the complete event capturectrl.Complete += new EventHandler(CaptureCtrl_Complete); // start the capture process capturectrl.StartCapture(CaptureMode.VideoAndAudio); // we'll loop on the state and pump messages for this example. // but you should not need to if running from a Windows Forms application. while (capturectrl.State == CaptureState.Running) Application.DoEvents(); } } catch (Exception) { _result = false; } } public void CaptureCtrl_Complete(object sender, EventArgs e) { // set result _result = true; } static class LEAD_VARS { public const string MediaDir = @"C:\LEADTOOLS23\Media"; }