Extension URI,Description,Contact,Reference
urn:ietf:params:rtp-hdrext:toffset,Transmission Time offsets,[Singer],[RFC5450]
urn:ietf:params:rtp-hdrext:smpte-tc,SMPTE time-code mapping,[Singer],[RFC5484]
urn:ietf:params:rtp-hdrext:ntp-64,Synchronisation metadata: 64-bit timestamp format,[Thomas_Schierl],[IETF Audio/Video Transport Working Group][RFC6051]
urn:ietf:params:rtp-hdrext:ntp-56,Synchronisation metadata: 56-bit timestamp format,[Thomas_Schierl],[IETF Audio/Video Transport Working Group][RFC6051]
urn:ietf:params:rtp-hdrext:ssrc-audio-level,Audio Level,[Jonathan_Lennox],[RFC6464]
urn:ietf:params:rtp-hdrext:csrc-audio-level,Mixer-to-client audio level indicators,[Emil_Ivov],[RFC6465]
urn:ietf:params:rtp-hdrext:encrypt,Encrypted extension header element,[Jonathan_Lennox],[RFC6904]
urn:3gpp:video-orientation,"Coordination of video orientation (CVO) feature, see clause 6.2.3",[Specifications_Manager_3GPP],"[3GPP TS 26.114, version 12.5.0]"
urn:3gpp:video-orientation:6,"Higher granularity (6-bit) coordination of video orientation (CVO) feature, see clause 6.2.3",[Specifications_Manager_3GPP],"[3GPP TS 26.114, version 12.5.0]"
urn:3gpp:roi-sent,"Signalling of the arbitrary region-of-interest (ROI) information
for the sent video, see clause 6.2.3.4",[Specifications_Manager_3GPP],"[3GPP TS 26.114, version 13.1.0]"
urn:3gpp:predefined-roi-sent,"Signalling of the predefined region-of-interest (ROI) information
for the sent video, see clause 6.2.3.4",[Specifications_Manager_3GPP],"[3GPP TS 26.114, version 13.1.0]"
urn:ietf:params:rtp-hdrext:sdes,Reserved as base URN for RTCP SDES items that are also defined as RTP compact header extensions.,Authors of [RFC7941],[RFC7941]
urn:ietf:params:rtp-hdrext:splicing-interval,Splicing Interval,[Jinwei_Xia],[RFC8286]
urn:ietf:params:rtp-hdrext:framemarking,Frame marking information for video streams,[Mo_Zanaty],[RFC9626]
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