What is RTP SSRC?

synchronization source (SSRC): The source of a stream of RTP packets, identified by a 32-bit numeric SSRC identifier carried in the RTP header so as not to be dependent upon the network address.

Whats is RTP?

Real-time Transport Protocol (RTP) is a network standard designed for transmitting audio or video data that is optimized for consistent delivery of live data. It is used in internet telephony, Voice over IP and video telecommunication.

What is RTP timestamp?

RTP timestamp is an important attribute in RTP header and is used plug the packet in right order for playback. Also it is used to synchronize audio video packets.

What is source of synchronization?

The synchronization source (SSRC) field is used to identify the source of a stream of packets from a synchronization source. A translator forwards the stream of packets while preserving the SSRC identifier.

What is SSRC in SIP?

SSRC Identifies the synchronization source. The value is chosen randomly, with the intent that no two synchronization sources within the same RTP session will have the same SSRC.

What is SSRC Webrtc?

SSRC stands for Synchronization Source. It is a 32 bit random value that is generated in RTP to denote a specific source used to send media in an RTP connection.

When should I use RTP?

RTP is used in communication and entertainment systems that involve streaming media, such as telephony, video teleconference applications including WebRTC, television services and web-based push-to-talk features. RTP typically runs over User Datagram Protocol (UDP).

How is RTP timestamp calculated?

Audio and video timestamps are calculated in the same way. Audio RTP payload formats typically uses an 8Khz clock. Then take the first audio sample containing e.g. 20ms and assign this timestamp t = 0. 20 ms is a 1/50 of a second, hence this equals a 8000/50 = 160 timestamp increment for the following sample.

What is audio SSRC?

When there is more than one source the identifier defines the mixer?

Discussion Forum

What is SSRC in SDP?

The attributes are used to, for a given SDP media description, indicate the multiple stream capabilities of an entity. The “max-send-ssrc” attribute is used to indicate simultaneous sending capabilities, and the “max-recv-ssrc” attribute is used to indicate simultaneous receiving capabilities.

What does SSRC stand for in RTP?

Multiple Synchronization sources (SSRC) in RTP Session Signaling RTP has always been a protocol that supports multiple participants each sending their own media streams in an RTP session. Unfortunately many implementations are designed only for point to point voice over IP with a single source in each end-point.

Why SSRC multiplexing is used for RTP retransmission?

This prevents the complexity of associating original sources with retransmission sources when SSRC multiplexing is used for RTP retransmission, as is described in Section 5.3 of [RFC4588] . 8.

What is a synchronization source (SSRC)?

Within an RTP session, the source of a single stream of RTP packets is known as a synchronization source (SSRC). Every synchronization source is identified by a 32-bit numeric identifier.

Can two RTP endpoints choose the same SSRC identifier?

As such, it is possible for two RTP endpoints to choose the same SSRC identifier. Though the probability of this is low, the RTP specification [ RFC3550] requires that all RTP endpoints MUST be prepared to detect and resolve collisions.