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The [[Real-time Transport Protocol]] (RTP) specifies a general-purpose data format and [[network protocol]] for transmitting digital media streams on [[Internet Protocol]] (IP) networks. The details of media encoding, such as signal sampling rate, frame size and timing, are specified in an '''RTP payload format'''. The format parameters of the RTP payload are typically communicated between transmission endpoints with the [[Session Description Protocol]] (SDP), but other protocols, such as the [[XMPP|Extensible Messaging and Presence Protocol]] (XMPP) may be used.
==
The technical parameters of payload formats for audio and video streams are standardised.
The standard also describes the process of registering new payload types with IANA
* {{Sum RFC|4856|ref=yes}}
▲* {{Sum RFC|3190|ref=yes}}
==Text messaging payload types==▼
▲* {{Sum RFC|6184|ref=yes}}
Payload formats and types for text messaging are defined in the following specifications:
▲* {{Sum RFC|3640|ref=yes}}
* {{Sum RFC|
* {{Sum RFC|9071|ref=yes}}▼
==MIDI payload types==▼
Payload formats and types for [[MIDI]] are defined in the following specifications:
*{{Sum RFC|6295|ref=yes}}▼
*{{Sum RFC|4696|ref=yes}}▼
==Audio and video payload types==
Payload formats and types for audio and video are defined in the following specifications:
* {{Sum RFC|2190|ref=yes}}
* {{Sum RFC|2198|ref=yes}}
* {{Sum RFC|2250|ref=yes}}
* {{Sum RFC|
* {{Sum RFC|2435|ref=yes}}
* {{Sum RFC|
* {{Sum RFC|2658|ref=yes}}
* {{Sum RFC|3190|ref=yes}}
* {{Sum RFC|3389|ref=yes}}
* {{Sum RFC|3497|ref=yes}}
* {{Sum RFC|3640|ref=yes}}
* {{Sum RFC|3952|ref=yes}}
* {{Sum RFC|4175|ref=yes}}
* {{Sum RFC|4184|ref=yes}}
* {{Sum RFC|4352|ref=yes}}
* {{Sum RFC|4587|ref=yes}}
* {{Sum RFC|4598|ref=yes}}
* {{Sum RFC|4629|ref=yes}}
* {{Sum RFC|4733|ref=yes}}
* {{Sum RFC|4749|ref=yes}}
* {{Sum RFC|4788|ref=yes}}
* {{Sum RFC|4867|ref=yes}}
* {{Sum RFC|5188|ref=yes}}
* {{Sum RFC|5215|ref=yes}}
* {{Sum RFC|5371|ref=yes}}
* {{Sum RFC|5391|ref=yes}}
* {{Sum RFC|5404|ref=yes}}
* {{Sum RFC|5574|ref=yes}}
* {{Sum RFC|5577|ref=yes}}
* {{Sum RFC|5584|ref=yes}}
* {{Sum RFC|5686|ref=yes}}
* {{Sum RFC|5993|ref=yes}}
* {{Sum RFC|6184|ref=yes}}
* {{Sum RFC|6190|ref=yes}}
* {{Sum RFC|6416|ref=yes}}
* {{Sum RFC|6469|ref=yes}}
* {{Sum RFC|7310|ref=yes}}
* {{Sum RFC|7587|ref=yes}}
* {{Sum RFC|7741|ref=yes}}
* {{Sum RFC|7798|ref=yes}}
* {{Sum RFC|9134|ref=yes}}
* {{Sum RFC|9607|ref=yes}}
* {{Sum RFC|9628|ref=yes}}
Payload identifiers 96–127 are used for payloads defined dynamically during a session. It is recommended to dynamically assign port numbers, although port numbers 5004 and 5005 have been registered for use of the profile when a dynamically assigned port is not required.
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|ITU-T [[G.711]] PCM [[μ-Law]] audio 64 kbit/s
|{{
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|reserved, previously [[FS-1016]] [[CELP]] audio 4.8 kbit/s
|{{
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|reserved, previously ITU-T [[G.721]] [[ADPCM]] audio 32 kbit/s or ITU-T [[G.726]] audio 32 kbit/s
|{{
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|20
|European [[GSM-FR|GSM Full Rate]] audio 13 kbit/s (GSM 06.10)
|{{
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|30
|ITU-T [[G.723.1]] audio
|{{
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|20
|[[Interactive Multimedia Association|IMA]] [[ADPCM]] audio 32 kbit/s
|{{
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|20
|[[Interactive Multimedia Association|IMA]] [[ADPCM]] audio 64 kbit/s
|{{
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|20
|Experimental [[Linear predictive coding|Linear Predictive Coding]] audio 5.6 kbit/s
|{{
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|20
|ITU-T G.711 PCM [[A-Law]] audio 64 kbit/s
|{{
|-
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|20
|ITU-T [[G.722]] audio 64 kbit/s
|{{
|-
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|20
|[[Linear PCM]] 16-bit Stereo audio 1411.2 kbit/s,{{Ref RFC|2586}}{{Ref RFC|3108|rp=62}}{{Ref RFC|4856|rp=18}} uncompressed
|{{
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|20
|[[Linear PCM]] 16-bit audio 705.6 kbit/s, uncompressed
|{{
|-
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|20
|[[QCELP|Qualcomm Code Excited Linear Prediction]]
|{{
|-
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|[[Comfort noise]]. Payload type used with audio codecs that do not support comfort noise as part of the codec itself such as [[G.711]], [[G.722.1]], [[G.722]], [[G.726]], [[G.727]], [[G.728]], [[GSM 06.10]], [[Siren (codec)|Siren]], and RTAudio.
|{{
|-
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|[[MPEG-1]] or [[MPEG-2]] audio only
|{{
|-
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|20
|ITU-T [[G.728]] audio 16 kbit/s
|{{
|-
Line 220 ⟶ 267:
|20
|[[Interactive Multimedia Association|IMA]] [[ADPCM]] audio 44.1 kbit/s
|{{
|-
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|20
|IMA ADPCM audio 88.2 kbit/s
|{{
|-
Line 242 ⟶ 289:
|20
|ITU-T [[G.729]] and G.729a audio 8 kbit/s; Annex B is implied unless the <code>annexb=no</code> parameter is used
|{{
|-
Line 253 ⟶ 300:
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|reserved, previously [[comfort noise]]
|{{
|-
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|[[Sun Microsystems|Sun]] CellB video<ref>[https://docs.oracle.com/cd/E19504-01/802-5863/802-5863.pdf XIL Programmer's Guide], Chapter 22 "CellB Codec". August 1997. Retrieved on 2014-07-19.</ref>
|{{
|-
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|[[JPEG]] video
|{{
|-
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|[[Xerox PARC]]'s Network Video (nv)<ref>[https://www.cs.columbia.edu/~hgs/rtp/nv.html nv - network video on Henning Schulzrinne's website], [https://www.dgp.toronto.edu/tp/techdocs/NetVid.html Network Video on The University of Toronto's website], Retrieved on 2009-07-09.</ref><ref>[https://github.com/ronf/nv Ron Frederick Github with source code]</ref>
|{{
|-
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|ITU-T [[H.261]] video
|{{
|-
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|MPEG-1 and MPEG-2 video
|{{
|-
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|MPEG-2 [[MPEG transport stream|transport stream]]
|{{
|-
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|[[H.263]] video, first version (1996)
|{{
|-
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|reserved because RTCP packet types 200–204 would otherwise be indistinguishable from RTP payload types 72–76 with the marker bit set
|{{
|-
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|note that RTCP packet type 207 (XR, Extended Reports) would be indistinguishable from RTP payload types 79 with the marker bit set
|{{
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|[[H.263]] video, second version (1998)
|{{
|-
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|[[H.263]] video, third version (2000)
|{{
|-
Line 385 ⟶ 432:
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|[[H.264]] video (MPEG-4 Part 10)
|{{IETF RFC
|-
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|[[H.264]] video
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|-
Line 407 ⟶ 454:
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|[[H.265]] video (HEVC)
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|-
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|20, 30
|[[iLBC|Internet low Bitrate Codec]] 13.33 or 15.2 kbit/s
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|-
Line 440 ⟶ 487:
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|ITU-T [[G.711|G.711.1]] A-law
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|-
Line 451 ⟶ 498:
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|ITU-T [[G.711|G.711.1]] μ-law
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|-
Line 473 ⟶ 520:
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|ITU-T [[G.719]]
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|-
Line 484 ⟶ 531:
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|ITU-T [[G.722.1]] and G.722.1 Annex C
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|-
Line 495 ⟶ 542:
|20
|ITU-T [[G.726]] audio 16 kbit/s
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|-
Line 506 ⟶ 553:
|20
|ITU-T G.726 audio 24 kbit/s
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|-
Line 517 ⟶ 564:
|20
|ITU-T G.726 audio 32 kbit/s
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|-
Line 528 ⟶ 575:
|20
|ITU-T G.726 audio 40 kbit/s
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|-
Line 539 ⟶ 586:
|20
|ITU-T [[G.729]] Annex D
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|-
Line 550 ⟶ 597:
|20
|ITU-T [[G.729]] Annex E
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|-
Line 561 ⟶ 608:
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|ITU-T [[G.729.1]]
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|-
Line 572 ⟶ 619:
|20
|ITU-T [[GSM-EFR]] (GSM 06.60)
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|-
Line 583 ⟶ 630:
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|ITU-T [[Half Rate|GSM-HR]] (GSM 06.20)
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|-
Line 594 ⟶ 641:
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|[[Adaptive Multi-Rate]] audio
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|-
Line 605 ⟶ 652:
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|[[AMR-WB|Adaptive Multi-Rate Wideband]] audio (ITU-T G.722.2)
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|-
Line 616 ⟶ 663:
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|[[AMR-WB+|Extended Adaptive Multi Rate – WideBand]] audio
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|-
Line 627 ⟶ 674:
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|[[Vorbis]] audio
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|-
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|20
|[[Opus (audio format)|Opus]] audio
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|-
Line 649 ⟶ 696:
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|[[Speex]] audio
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|-
Line 660 ⟶ 707:
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|Loss-Tolerant [[MP3]] audio
|{{IETF RFC
|-
Line 671 ⟶ 718:
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|[[MPEG-4 Audio]] (includes [[Advanced_Audio_Coding|AAC]])
|{{IETF RFC
|-
Line 682 ⟶ 729:
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|[[MPEG-4 Visual]]
|{{IETF RFC
|-
Line 693 ⟶ 740:
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|[[MPEG-4]] Elementary Streams
|
|-
Line 704 ⟶ 751:
|
|[[VP8]] video
|
|-
Line 715 ⟶ 762:
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|[[VP9]] video
|{{IETF RFC|9628|link=no}}
|-
Line 737 ⟶ 784:
|20
|[[Linear PCM]] 8-bit audio with 128 offset
|{{IETF RFC
|-
Line 748 ⟶ 795:
|20 (by analogy with L16)
|IEC 61119 12-bit nonlinear audio
|{{IETF RFC
|-
Line 759 ⟶ 806:
|20
|[[Linear PCM]] 16-bit audio
|{{IETF RFC
|-
Line 770 ⟶ 817:
|20 (by analogy with L16)
|[[Linear PCM]] 20-bit audio
|{{IETF RFC
|-
Line 781 ⟶ 828:
|20 (by analogy with L16)
|[[Linear PCM]] 24-bit audio
|{{IETF RFC
|-
Line 792 ⟶ 839:
|
|Uncompressed Video
|
|-
Line 803 ⟶ 850:
|
|[[Dolby AC-3]] audio
|
|-
Line 814 ⟶ 861:
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|[[Dolby Digital Plus|Enhanced AC-3]] audio
|
|-
Line 825 ⟶ 872:
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|[[Text over IP]]
|
|-
|dynamic
|EVRC<br>EVRC0<br>EVRC1
|audio
Line 835 ⟶ 883:
|
|[[Enhanced Variable Rate Codec|EVRC]] audio
|
|-
|dynamic
Line 845 ⟶ 893:
|
|[[Enhanced Variable Rate Codec B|EVRC-B]] audio
|
|-
Line 856 ⟶ 904:
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|[[Enhanced Variable Rate Codec B|EVRC-WB]] audio
|
|-
Line 867 ⟶ 915:
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|[[JPEG 2000]] video
|
|-
Line 878 ⟶ 926:
|
|[[UEMCLIP]] audio
|
|-
Line 889 ⟶ 937:
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|[[Adaptive Transform Acoustic Coding|ATRAC]]3 audio
|
|-
Line 900 ⟶ 948:
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|[[Adaptive Transform Acoustic Coding|ATRAC]]3+ audio
|
|-
Line 911 ⟶ 959:
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|[[Adaptive Transform Acoustic Coding|ATRAC]] Advanced Lossless audio
|
|-
Line 922 ⟶ 970:
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|[[DV (video format)|DV]] video
|{{IETF RFC
|-
Line 933 ⟶ 981:
|
|[[ITU-R BT.656]] video
|
|-
Line 944 ⟶ 992:
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|Bundled MPEG-2 video
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|-
Line 955 ⟶ 1,003:
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|[[SMPTE 292M]] video
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|-
Line 966 ⟶ 1,014:
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|Redundant Audio Data
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|-
Line 977 ⟶ 1,025:
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|Variable-rate DVI4 audio
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|-
Line 988 ⟶ 1,036:
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|MPEG-1 Systems Streams video
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|-
Line 999 ⟶ 1,047:
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|MPEG-2 Program Streams video
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|-
Line 1,010 ⟶ 1,058:
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|tone
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|-
Line 1,021 ⟶ 1,069:
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|[[Dual-tone multi-frequency signaling|DTMF]] tone
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|-
Line 1,032 ⟶ 1,080:
|4<ref group=note>For aptX, the packetization interval must be rounded down to the nearest packet interval that can contain an integer number of samples. So at sampling rates of 11025, 22050, or 44100, a packetization rate of "4" is rounded down to 3.99.</ref>
|[[aptX]] audio
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|-
Line 1,043 ⟶ 1,091:
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|[[JPEG XS]] video
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|-
Line 1,054 ⟶ 1,102:
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|[[Secure Communications Interoperability Protocol|SCIP]]
|
|}
{{reflist|group=note}}
▲==Text messaging payload ==
▲* {{Sum RFC|4103|ref=yes|notes=yes}}
▲* {{Sum RFC|9071|ref=yes}}
▲==MIDI payload ==
▲*{{Sum RFC|6295|ref=yes}}
▲*{{Sum RFC|4696|ref=yes}}
==See also==
| |||