Der Code-Ausschnitt stammt vom "Simple Screen Recorder"
Der Bildinhalt wird auch einwandfrei erfasst, wie komme ich aber an die Audio-Samples.
private void CreateMediaObjects()
{
// Create our encoding profile based on the size of the item
int width = _captureItem.Size.Width;
int height = _captureItem.Size.Height;
// Describe our input: uncompressed BGRA8 buffers
var videoProperties = VideoEncodingProperties.CreateUncompressed(MediaEncodingSubtypes.Bgra8, (uint)width, (uint)height);
_videoDescriptor = new VideoStreamDescriptor(videoProperties);
//_mediaStreamSource = new MediaStreamSource(_videoDescriptor);
//????????????????????
var audioProperties = AudioEncodingProperties.CreatePcm(48000, 2, 16);
_audioDescriptor = new AudioStreamDescriptor(audioProperties);
_mediaStreamSource = new MediaStreamSource(_videoDescriptor, _audioDescriptor);
//????????????????????
_mediaStreamSource.BufferTime = TimeSpan.FromSeconds(0);
_mediaStreamSource.Starting += OnMediaStreamSourceStarting;
_mediaStreamSource.SampleRequested += OnMediaStreamSourceSampleRequested;
// Create our transcoder
_transcoder = new MediaTranscoder();
_transcoder.HardwareAccelerationEnabled = true;
}
private void OnMediaStreamSourceSampleRequested(MediaStreamSource sender, MediaStreamSourceSampleRequestedEventArgs args)
{
if (_isRecording && !_closed)
{
if (args.Request.StreamDescriptor == _videoDescriptor)
{
try
{
using (var frame = _frameGenerator.WaitForNewFrame())
{
if (frame == null)
{
args.Request.Sample = null;
DisposeInternal();
return;
}
var timeStamp = frame.SystemRelativeTime;
var sample = MediaStreamSample.CreateFromDirect3D11Surface(frame.Surface, timeStamp);
args.Request.Sample = sample;
}
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
Debug.WriteLine(e.StackTrace);
Debug.WriteLine(e);
args.Request.Sample = null;
DisposeInternal();
}
}
else
{
//????????????????
}
}
else
{
//...
}
}
