rfc9626v3.txt		rfc9626.txt
	Internet Engineering Task Force (IETF) M. Zanaty		Internet Engineering Task Force (IETF) M. Zanaty
	Request for Comments: 9626 E. Berger		Request for Comments: 9626 E. Berger
	Category: Experimental S. Nandakumar		Category: Experimental S. Nandakumar
	ISSN: 2070-1721 Cisco Systems		ISSN: 2070-1721 Cisco Systems
	February 2025		March 2025
	Video Frame Marking RTP Header Extension		Video Frame Marking RTP Header Extension
	Abstract		Abstract
	This document describes a Video Frame Marking RTP header extension		This document describes a Video Frame Marking RTP header extension
	used to convey information about video frames that is critical for		used to convey information about video frames that is critical for
	error recovery and packet forwarding in RTP middleboxes or network		error recovery and packet forwarding in RTP middleboxes or network
	nodes. It is most useful when media is encrypted and essential when		nodes. It is most useful when media is encrypted and essential when
	the middlebox or node has no access to the media decryption keys. It		the middlebox or node has no access to the media decryption keys. It
	skipping to change at line 643 ¶		skipping to change at line 643 ¶
	frame size alone can leak this in the absence of any unencrypted		frame size alone can leak this in the absence of any unencrypted
	metadata. However, unencrypted metadata provides a reliable signal		metadata. However, unencrypted metadata provides a reliable signal
	rather than a statistical probability; so endpoints should take that		rather than a statistical probability; so endpoints should take that
	into consideration to balance the privacy leakage risk against the		into consideration to balance the privacy leakage risk against the
	potential benefit of optimized media delivery when deciding whether		potential benefit of optimized media delivery when deciding whether
	to negotiate and encrypt this header extension.		to negotiate and encrypt this header extension.
	5. IANA Considerations		5. IANA Considerations
	This document defines a new extension URI listed in the "RTP Compact		This document defines a new extension URI listed in the "RTP Compact
	Header Extensions" subregistry of the "Real-Time Transport Protocol		Header Extensions" registry of the "Real-Time Transport Protocol
	(RTP) Parameters" registry, according to the following data:		(RTP) Parameters" registry group, according to the following data:
	Extension URI: urn:ietf:params:rtp-hdrext:framemarking		Extension URI: urn:ietf:params:rtp-hdrext:framemarking
	Description: Frame marking information for video streams		Description: Frame marking information for video streams
	Contact: mzanaty@cisco.com		Contact: mzanaty@cisco.com
	Reference: RFC 9626		Reference: RFC 9626
	6. References		6. References
	skipping to change at line 737 ¶		skipping to change at line 737 ¶
	Conferencing (PERC)", RFC 8871, DOI 10.17487/RFC8871,		Conferencing (PERC)", RFC 8871, DOI 10.17487/RFC8871,
	January 2021, <https://www.rfc-editor.org/info/rfc8871>.		January 2021, <https://www.rfc-editor.org/info/rfc8871>.
	[RFC9335] Uberti, J., Jennings, C., and S. Murillo, "Completely		[RFC9335] Uberti, J., Jennings, C., and S. Murillo, "Completely
	Encrypting RTP Header Extensions and Contributing		Encrypting RTP Header Extensions and Contributing
	Sources", RFC 9335, DOI 10.17487/RFC9335, January 2023,		Sources", RFC 9335, DOI 10.17487/RFC9335, January 2023,
	<https://www.rfc-editor.org/info/rfc9335>.		<https://www.rfc-editor.org/info/rfc9335>.
	[RFC9627] Lennox, J., Hong, D., Uberti, J., Holmer, S., and M.		[RFC9627] Lennox, J., Hong, D., Uberti, J., Holmer, S., and M.
	Flodman, "The Layer Refresh Request (LRR) RTCP Feedback		Flodman, "The Layer Refresh Request (LRR) RTCP Feedback
	Message", RFC 9627, DOI 10.17487/RFC9627, February 2025,		Message", RFC 9627, DOI 10.17487/RFC9627, March 2025,
	<https://www.rfc-editor.org/info/rfc9627>.		<https://www.rfc-editor.org/info/rfc9627>.
	[RFC9628] Uberti, J., Holmer, S., Flodman, M., Hong, D., and J.		[RFC9628] Uberti, J., Holmer, S., Flodman, M., Hong, D., and J.
	Lennox, "RTP Payload Format for VP9 Video", RFC 9628,		Lennox, "RTP Payload Format for VP9 Video", RFC 9628,
	DOI 10.17487/RFC9628, February 2025,		DOI 10.17487/RFC9628, March 2025,
	<https://www.rfc-editor.org/info/rfc9628>.		<https://www.rfc-editor.org/info/rfc9628>.
	Acknowledgements		Acknowledgements
	Many thanks to Bernard Aboba, Jonathan Lennox, Stephan Wenger, Dale		Many thanks to Bernard Aboba, Jonathan Lennox, Stephan Wenger, Dale
	Worley, and Magnus Westerlund for their inputs.		Worley, and Magnus Westerlund for their inputs.
	Authors' Addresses		Authors' Addresses
	Mo Zanaty		Mo Zanaty
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