RtspClientSharp 1.2.4

Features

• Supported transport protocols: TCP/HTTP/UDP
• Supported media codecs: H.264/MJPEG/AAC/G711A/G711U/PCM/G726
• No external dependencies, pure C# code
• Asynchronous nature with cancellation tokens support
• Designed to be fast and scaleable
• Low GC pressure during receive stage (when RTSP session is established); low amount of freezes under high load

Using RtspClientSharp

Something like this:

var serverUri = new Uri("rtsp://192.168.1.77:554/ucast/11");
var credentials = new NetworkCredential("admin", "123456");
var connectionParameters = new ConnectionParameters(serverUri, credentials);
connectionParameters.RtpTransport = RtpTransportProtocol.TCP;
using(var rtspClient = new RtspClient(connectionParameters))
{
    rtspClient.FrameReceived += (sender, frame) =>
    {
        //process (e.g. decode/save to file) encoded frame here or 
        //make deep copy to use it later because frame buffer (see FrameSegment property) will be reused by client
        switch (frame)
        {
            case RawH264IFrame h264IFrame:
            case RawH264PFrame h264PFrame:
            case RawJpegFrame jpegFrame:
            case RawAACFrame aacFrame:
            case RawG711AFrame g711AFrame:
            case RawG711UFrame g711UFrame:
            case RawPCMFrame pcmFrame:
            case RawG726Frame g726Frame:
        }
    }
    await rtspClient.ConnectAsync(token);
    await rtspClient.ReceiveAsync(token);
}

You could find more complex samples here (e.g. simple RTSP player with full frame decoding and rendering processes): https://github.com/BogdanovKirill/RtspClientSharp/tree/master/Examples