Media Blocks SDK .NET — 在C#中构建模块化媒体管道

// Create MediaBlocks pipeline
_pipeline = new MediaBlocksPipeline();

// Add file source
var fileSourceSettings = await UniversalSourceSettings.CreateAsync("video.mp4");
var videoStreamAvailable = fileSourceSettings.GetInfo().VideoStreams.Count > 0;
var audioStreamAvailable = fileSourceSettings.GetInfo().AudioStreams.Count > 0;

var fileSource = new UniversalSourceBlock(fileSourceSettings);

// Add video renderer
if (videoStreamAvailable)
{
    var videoRenderer = new VideoRendererBlock(_pipeline, VideoView1);
    _pipeline.Connect(fileSource, videoRenderer);
}

// Add audio output
if (audioStreamAvailable)
{
    var audioOutputDevice = (await DeviceEnumerator.Shared.AudioOutputsAsync(
        AudioOutputDeviceAPI.DirectSound))[0];
    var audioOutput = new AudioRendererBlock(
        new AudioRendererSettings(audioOutputDevice));
    _pipeline.Connect(fileSource, audioOutput);
}

// Start playback
await _pipeline.StartAsync();

// Create MediaBlocks pipeline
_pipeline = new MediaBlocksPipeline();

// Add file source
var fileSourceSettings = await UniversalSourceSettings.CreateAsync(edFilename.Text);
var videoStreamAvailable = fileSourceSettings.GetInfo().VideoStreams.Count > 0;
var audioStreamAvailable = fileSourceSettings.GetInfo().AudioStreams.Count > 0;

var fileSource = new UniversalSourceBlock(fileSourceSettings);

// Add video renderer, text overlay and image overlay
if (videoStreamAvailable)
{
    var videoRenderer = new VideoRendererBlock(_pipeline, VideoView1);
    var textOverlay = new TextOverlayBlock(new TextOverlaySettings("Hello world!"));
    var imageOverlay = new ImageOverlayBlock(new ImageOverlaySettings("logo.png"));

    _pipeline.Connect(fileSource, textOverlay);
    _pipeline.Connect(textOverlay, imageOverlay);
    _pipeline.Connect(imageOverlay, videoRenderer);
}

// Add audio output and equalizer
if (audioStreamAvailable)
{
    var audioOutputDevice = (await DeviceEnumerator.Shared.AudioOutputsAsync(AudioOutputDeviceAPI.DirectSound))[0];
    var audioOutput = new AudioRendererBlock(new AudioRendererSettings(audioOutputDevice));

    var equalizer = new EqualizerParametricBlock();
    // set some equalizer settings

    _pipeline.Connect(fileSource, equalizer);
    _pipeline.Connect(equalizer, audioOutput);
}

// Start playback
await _pipeline.StartAsync();

// Create MediaBlocksPipeline object
_pipeline = new MediaBlocksPipeline();

// Add default video and audio sources
var videoSources = (await DeviceEnumerator.Shared.VideoSourcesAsync()).ToList();
var videoSource = new SystemVideoSourceBlock(
    new VideoCaptureDeviceSourceSettings(videoSources[0]));

var audioSources = (await DeviceEnumerator.Shared.AudioSourcesAsync()).ToList();
var audioSource = new SystemAudioSourceBlock(audioSources[0].CreateSourceSettings());

// Add video renderer
var videoRenderer = new VideoRendererBlock(_pipeline, videoView: VideoView1);

// Add audio renderer
var audioRenderers = (await DeviceEnumerator.Shared.AudioOutputsAsync()).ToList();
var audioRenderer = new AudioRendererBlock(new AudioRendererSettings(audioRenderers[0]));

// Connect everything
_pipeline.Connect(videoSource, videoRenderer);
_pipeline.Connect(audioSource, audioRenderer);

// Start preview
await _pipeline.StartAsync();

// Create Media Blocks pipeline
_pipeline = new MediaBlocksPipeline();

// Create video renderer
var videoRenderer = new VideoRendererBlock(_pipeline, VideoView1);

// Add RTSP camera source
var rtsp = await RTSPSourceSettings.CreateAsync(new Uri(edURL.Text),
    edLogin.Text, edPassword.Text, audioEnabled: cbAudioStream.Checked);
var rtspSource = new RTSPSourceBlock(rtsp);

_pipeline.Connect(rtspSource, videoRenderer);

// Add audio output (if required)
if (cbAudioStream.Checked && rtsp.IsAudioAvailable())
{
    var audioOutputDevice = (await DeviceEnumerator.Shared.AudioOutputsAsync(
        AudioOutputDeviceAPI.DirectSound))[0];
    var audioOutput = new AudioRendererBlock(new AudioRendererSettings(audioOutputDevice));
    _pipeline.Connect(rtspSource, audioOutput);
}

// Start IP camera preview
await _pipeline.StartAsync();

// Create the pipeline
_pipeline = new MediaBlocksPipeline();

// Add video and audio sources
var videoSources = (await DeviceEnumerator.Shared.VideoSourcesAsync()).ToList();
var videoSource = new SystemVideoSourceBlock(new VideoCaptureDeviceSourceSettings(videoSources[0]));

var audioSources = (await DeviceEnumerator.Shared.AudioSourcesAsync()).ToList();
var audioSource = new SystemAudioSourceBlock(audioSources[0].CreateSourceSettings());

// Add video renderer and specify VideoView control
var videoRenderer = new VideoRendererBlock(_pipeline, videoView: VideoView1);

// Add audio renderer
var audioRenderers = (await DeviceEnumerator.Shared.AudioOutputsAsync()).ToList();
var audioRenderer = new AudioRendererBlock(new AudioRendererSettings(audioRenderers[0]));

// Configure MP4 output
var output = new MP4OutputBlock(Path.Combine(
    Environment.GetFolderPath(Environment.SpecialFolder.MyVideos), "output.mp4"));

// Add video and audio tees
var videoTee = new TeeBlock(2, MediaBlockPadMediaType.Video);
var audioTee = new TeeBlock(2, MediaBlockPadMediaType.Audio);

// Connect everything
_pipeline.Connect(videoSource, videoTee);
_pipeline.Connect(audioSource, audioTee);

_pipeline.Connect(videoTee, videoRenderer);
_pipeline.Connect(audioTee, audioRenderer);

_pipeline.Connect(videoTee, output);
_pipeline.Connect(audioTee, output);

// Start MP4 recording
await _pipeline.StartAsync();