What is RTP multicast?

RTP allows data transfer to multiple destinations through IP multicast. RTP is regarded as the primary standard for audio/video transport in IP networks and is used with an associated profile and payload format.

How do I get RTP streaming?

VLC Media Player

  1. Select Open Network from the File menu and click the Open RTP/UDP Stream button.
  2. Select UDP as the protocol and Multicast as the mode. Enter 233.0. 14.137 for the IP Address and 4000 for the Port.
  3. Click Open and then Open again and the broadcast will start.

Is RTSP Unicast or multicast?

RTP/RTSP is a pull protocol, this means the decoder connects to the encoder using the RTSP protocol the encoder then sends video to the decoder using the RTP protocol. Multiple decoders can connect to one RTSP server (this is called multi-unicast). RTSP also supports multicast.

What is live RTP streaming?

Use RTP to distribute live streams from Wowza Streaming Engine. For example, you can send a live stream from a server running Wowza Streaming Engine to any RTP destination. This allows you to use the RTP destination to deliver the stream to viewers.


RTP applications can use the Transmission Control Protocol (TCP), but most use the User Datagram protocol (UDP) instead because UDP allows for faster delivery of data.

How do I watch a multicast stream?

How to use VLC Media player to stream multicast video

  1. In the Media menu, choose “Stream”
  2. In the Open Media dialog file tab, click “add” and choose the file you want to stream and click “Open”
  3. At the bottom, click the “Stream” button.
  4. This opens the “Stream Output” dialog showing the source file you have chosen.

How do I use FFmpeg to stream video?


  1. Transcode a stream with FFmpeg. Transcode an RTSP or RTP IP camera source. Transcode an MPEG-TS stream.
  2. Stream over a different outgoing protocol. Stream over RTMP.
  3. Other FFmpeg command line examples. List available devices.
  4. Analyze an FFmpeg stream using logs and FFprobe. Save a live stream as .mp4.

Is unicast TCP or UDP?

Unicast uses TCP (Transmission Control Protocol) for communications while Multicast uses UDP (User Datagram Protocol). TCP, as you remember, is an acknowledged protocol. You get a message indicating that your message was received.

Does RTP use TCP or UDP?

Does video streaming use TCP or UDP?

video streaming all use TCP and simply buffer a few seconds of content, instead of using UDP since the delay is not crucial and TCP transfers can be easily accomplished over HTTP and web browsers without the need for additional plugins and software.

How is multicast used today?

Multicast IP Routing protocols are used to distribute data (for example, audio/video streaming broadcasts) to multiple recipients. Using multicast, a source can send a single copy of data to a single multicast address, which is then distributed to an entire group of recipients.

How does RTSP work in a multicast system?

As with the multicast delivery case, a pair of UDP ports is used for each of the elementary streams. For seekable streams, once the video is playing, the player has additional control using RTSP: It can cause playback to pause, or seek to a different position, or enter fast forward or rewind mode. RTSP Interleaved mode: RTP and RTSP over TCP

How many UDP ports are needed for multicast?

In the Multicast delivery scenario, each individual stream is sent on a pair of different UDP ports – one for data and the second for the related RTP Control Protocol or RTCP. That means for a video program consisting of a video stream and two audio streams, you’ll actually see packets being delivered to six UDP ports:

What’s the difference between RTP and RTSP streaming?

Some background: RTP is used primarily to stream either H.264 or MPEG-4 video. RTP is a system protocol that provides mechanisms to synchronize the presentation different streams – for instance audio and video. As such, it performs some of the same functions as an MPEG-2 transport or program stream.

How many UDP ports does RTP use?

That means for a video program consisting of a video stream and two audio streams, you’ll actually see packets being delivered to six UDP ports: Timestamps in the RTP headers can be used to synchronize the presentation of the various streams.