Type name: text Subtype name: flexfec Required parameters: o rate: The RTP timestamp (clock) rate. The rate SHALL be larger than 1000 Hz to provide sufficient resolution to RTCP operations. However, it is RECOMMENDED to select the rate that matches the rate of the protected source RTP stream. o repair-window: The time that spans the source packets and the corresponding repair packets. The size of the repair window is specified in microseconds. Encoding considerations: This media type is framed (see Section 4.8 in the template document [RFC6838]) and contains binary data. Security considerations: See Section 9 of [RFC8627]. Interoperability considerations: None. Published specification: [RFC8627]. Applications that use this media type: Multimedia applications that want to improve resiliency against packet loss by sending redundant data in addition to the source media. Fragment identifier considerations: None. Additional information: None. Person & email address to contact for further information: IESG and IETF Audio/Video Transport Payloads Working Group (or its successor as delegated by the IESG). Intended usage: COMMON. Restrictions on usage: This media type depends on RTP framing; hence, it is only defined for transport via RTP [RFC3550]. Author: Varun Singh . Change controller: IETF Audio/Video Transport Payloads Working Group delegated from the IESG (or its successor as delegated by the IESG).