Declaration

TIEMediaFoundationSourceReader = class;

Description

Encapsulates Microsoft Media Foundation source reader object, allowing the capture of video and audio samples from a source.
Presently TIEMediaFoundationSourceReader can capture from video capture devices (webcams), files (all formats supported by Windows Media Player) and URLs.

To setup TIEMediaFoundationSourceReader, applications must specify a video/file source, a video/audio stream and a media type. Then call GetNextSample() to read samples (images) from the source.
TImageEnView and TImageEnIO embed a TIEMediaFoundationSourceReader object to simplify usage.

TIEMediaFoundationSourceReader is available in Windows Vista and newer.

Overview

Demos

Example

// This is a minimal setup to capture from a webcam (the first webcam, using first proposed media type):

ImageEnView1.IO.MediaFoundationSourceReader.SetVideoInput(0);                   // select first video input (first webcam)
ImageEnView1.IO.MediaFoundationSourceReader.SetSelectedStreams('Video', true);  // enable first video stream
ImageEnView1.IO.MediaFoundationSourceReader.SelectMediaType(mmf_VIDEO_STREAM, 0);        // select first media type of the first video stream
ImageEnView1.IO.MediaFoundationSourceReader.StartCapture();                     // start capture

// handler for TImageEnView.OnMediaFoundatioNotify event
procedure TForm1.ImageEnView1MediaFoundationNotify(Sender, MediaFoundationObject: TObject; NotifyType: TIEMediaFountationNotifyType);
var
  sample: TIEMFReceivedSample;
begin
  if NotifyType = iemfnFRAME then // is this a frame?
  begin
    sample := ImageEnView1.IO.MediaFoundationSourceReader.GetNextSample();  // retrieve frame sample
    try
      sample.DecodeSample(ImageEnView1.IEBitmap); // convert frame sample to bitmap
      ImageEnView1.Update();                      // update TImageEnView to show the new bitmap
    finally
      sample.Free();                              // free the sample
    end;
  end;
end;

Methods and Properties

Media Foundation Availability

Events/Frame Notification

Video Input Information

Input Selection

Stream Information

Stream Selection

Media Type Information

Media Type Selection (for native media type selection)

Media Type Setting (for custom media types)

Current Media Type Info

Seeking

Capture Control

Sample Capture

Video Processing

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