在Winform中播放RTSP视频流

在WPF中可以使用LibVLCSharp.WinForms、Emgu.CV组件直接播放RTSP流。

1、LibVLCSharp.WinForms

(1) 引入NuGet包

LibVLCSharp.WinForms。

(2) 准备工作

public VlcVideoControl()
{
    InitializeComponent();

    if (!DesignMode)
    {
        Core.Initialize();
    }

    _libVlc = new LibVLC();
    _mediaPlayer = new MediaPlayer(_libVlc)
    {
        Volume = 0, //静音
        EnableHardwareDecoding = isMainControl //硬件加速
    };
    videoViewMain.MediaPlayer = _mediaPlayer;

    Load += OnLoad;
    HandleDestroyed += OnHandleDestroyed;
}

private void OnLoad(object sender, EventArgs e)
{
    DoubleBuffered = true;
    videoViewMain.Enabled = false;
}

private void OnHandleDestroyed(object sender, EventArgs args)
{
    _mediaPlayer.Stop();
    _mediaPlayer.Dispose();
    _libVlc.Dispose();
}

(3) 播放RTSP视频流

var options = new[]
{
    "no-audio",
    "file-caching=300",
    "live-capture-caching=300",
    "disc-caching-caching=300",
    "network-caching=333",
    "live-caching=300",
    _isMainControl || EnableHardwareDecoding ? "avcodec-hw=any" : "" //硬解码
};
using (var media = new Media(_libVlc, new Uri(CameraPara.Url), options))
{
    _mediaPlayer.Play(media);
}

(4) 停止播放

if (_mediaPlayer.IsPlaying)
{
    _mediaPlayer.Stop();
}

2、Emgu.CV

(1) 引入NuGet包

Emgu.CV.UI、Emgu.CV.runtime.windows。

(2) 加载控件

private void EmguVideoControl_Load(object sender, EventArgs e)
{
    DoubleBuffered = true;

    _imageBox = new ImageBox() { SizeMode = PictureBoxSizeMode.Zoom };
    Controls.Add(_imageBox);
}

(3) 播放RTSP视频流

public void Play(string url)
{
    _videoCapture = new VideoCapture(url);
    _videoCapture.ImageGrabbed += OnImageGrabbed;
    _videoCapture.Start();
}

private void OnImageGrabbed(object sender, EventArgs args)
{
    var frame = new Mat();
    try
    {
        if (_videoCapture.Retrieve(frame) && !frame.IsEmpty)
        {
            _imageBox.Image = frame;
        }
    }
    finally
    {
        frame.Dispose();
    }
}

(4) 停止播放

public void Stop()
{
    if (_videoCapture != null)
    {
        _videoCapture.ImageGrabbed -= OnImageGrabbed;
        _videoCapture.Dispose();
        _videoCapture = null;
    }
}