/// <summary>
/// Starts rendering to the target.
/// </summary>
/// <param name="videoPixelSize">The pixel size of the video.</param>
protected override void StartRenderingInternal(Size2 videoPixelSize)
{
m_outStreamNet = base.TargetFile.OpenOutputStream();
m_outStream = new MF.ByteStream(m_outStreamNet);
// Pass dummy filename as described here:
// https://social.msdn.microsoft.com/forums/windowsapps/en-us/49bffa74-4e84-4fd6-9d67-42e8385611b8/video-sinkwriter-in-metro-app
m_sinkWriter = MF.MediaFactory.CreateSinkWriterFromURL(
this.DummyFileName, m_outStream.NativePointer, null);
m_videoPixelSize = videoPixelSize;
CreateMediaTarget(m_sinkWriter, m_videoPixelSize, out m_streamIndex);
// Configure input
using (MF.MediaType mediaTypeIn = new MF.MediaType())
{
mediaTypeIn.Set <Guid>(MF.MediaTypeAttributeKeys.MajorType, MF.MediaTypeGuids.Video);
mediaTypeIn.Set <Guid>(MF.MediaTypeAttributeKeys.Subtype, VIDEO_INPUT_FORMAT);
mediaTypeIn.Set <int>(MF.MediaTypeAttributeKeys.InterlaceMode, (int)MF.VideoInterlaceMode.Progressive);
mediaTypeIn.Set <long>(MF.MediaTypeAttributeKeys.FrameSize, MFHelper.GetMFEncodedIntsByValues(videoPixelSize.Width, videoPixelSize.Height));
mediaTypeIn.Set <long>(MF.MediaTypeAttributeKeys.FrameRate, MFHelper.GetMFEncodedIntsByValues(m_framerate, 1));
m_sinkWriter.SetInputMediaType(m_streamIndex, mediaTypeIn, null);
}
// Start writing the video file
m_sinkWriter.BeginWriting();
// Set initial frame index
m_frameIndex = -1;
}
/// <summary>
/// Creates a media target.
/// </summary>
/// <param name="sinkWriter">The previously created SinkWriter.</param>
/// <param name="videoPixelSize">The pixel size of the video.</param>
/// <param name="streamIndex">The stream index for the new target.</param>
protected override void CreateMediaTarget(MF.SinkWriter sinkWriter, Size2 videoPixelSize, out int streamIndex)
{
using (MF.MediaType mediaTypeOut = new MF.MediaType())
{
mediaTypeOut.Set <Guid>(MF.MediaTypeAttributeKeys.MajorType, MF.MediaTypeGuids.Video);
mediaTypeOut.Set <Guid>(MF.MediaTypeAttributeKeys.Subtype, VIDEO_ENCODING_FORMAT);
mediaTypeOut.Set <int>(MF.MediaTypeAttributeKeys.AvgBitrate, base.Bitrate * 1000);
mediaTypeOut.Set <int>(MF.MediaTypeAttributeKeys.InterlaceMode, (int)MF.VideoInterlaceMode.Progressive);
mediaTypeOut.Set <long>(MF.MediaTypeAttributeKeys.FrameSize, MFHelper.GetMFEncodedIntsByValues(videoPixelSize.Width, videoPixelSize.Height));
mediaTypeOut.Set <long>(MF.MediaTypeAttributeKeys.FrameRate, MFHelper.GetMFEncodedIntsByValues(base.Framerate, 1));
sinkWriter.AddStream(mediaTypeOut, out streamIndex);
}
}
