Payload type (PT) |
Name |
Type |
No. of channels |
Clock rate (HZ) |
Description |
References |
0 |
PCMU |
Audio |
1 |
8000 |
ITU-T g.711 PCM
Micro-Law audio 64 kbit/s |
RFC 3551 |
1 |
Reserved (previolet 1016) |
Audio |
1 |
8000 |
Reserved, previusly CELP audio 4.8 kbit/s |
RFC 3551, previusly RFC 1890 |
2 |
Reserved (previusly g721) |
Audio |
1 |
8000 |
Reserved, previusly ITU-T G.721 ADPCM Audio 32 kbit/s |
RFC 3551, previusly RFC 1890 |
3 |
GSM |
Audio |
1 |
8000 |
European GSM full Rate Audio 13 kbit/s (GSM 06.10) |
RFC 3551 |
4 |
G723 |
Audio |
1 |
8000 |
ITU-T g.723.1 |
RFC 3551 |
5 |
Dvi4 |
Audio |
1 |
8000 |
IMA ADPCM Audio 32 kbit/s |
RFC 3551 |
6 |
Dvi4 |
Audio |
1 |
16000 |
IMA ADPCM 64 kbit/s |
RFC 3551 |
7 |
LPC |
Audio |
1 |
8000 |
Experimental Linear predictive coding audio |
RFC 3551 |
8 |
PCMA |
Audio |
1 |
8000 |
ITU-T g.711 PCM A-Law audio 64 kbit/s |
RFC 3551 |
9 |
G722 |
Audio |
1 |
8000 |
ITU-T g.722 audio |
RFC 3551-page 14 |
10 |
L16 |
Audio |
2 |
44100 |
Linear PCM 16-bit stereo audio 1411.2 kbit/s,[2][3][4] Uncompressed |
RFC 3551, page 27 |
11 |
L16 |
Audio |
1 |
44100 |
Linear PCM 16-bit audio 705.6 kbit/s, uncompressed |
RFC 3551, page 27 |
12 |
Qcelp |
Audio |
1 |
8000 |
Qualcomm Code Excited Linear Prediction |
RFC 2658,
RFC 3551 |
13 |
CN |
Audio |
1 |
8000 |
Comfort Noise |
RFC 3389 |
14 |
MPa |
Audio |
1 |
90000 |
MPEG-1 or MPEG-2 audio-only |
RFC 3551, RFC 2250 |
15 |
G728 |
Audio |
1 |
8000 |
ITU-T g.728 audio 16 kbit/s |
RFC 3551 |
16 |
Dvi4 |
Audio |
1 |
11025 |
IMA ADPCM |
RFC 3551 |
17 |
Dvi4 |
Audio |
1 |
22050 |
Ima ADPCM |
RFC 3551 |
18 |
G729 |
Audio |
1 |
8000 |
ITU-T g.729 and g.729a |
RFC 3551, page 20 |
25 |
Celb |
Video |
1 |
90000 |
Sun's cellb Video Encoding[5] |
RFC 2029 |
26 |
JPEG |
Video |
1 |
90000 |
JPEG video |
RFC 2435 |
28 |
NV |
Video |
1 |
90000 |
Xerox PARC's network video (NV)[6] |
RFC 3551, page 32 |
31 |
H261 |
Video |
1 |
90000 |
ITU-T H.261 video |
RFC 4587 |
32 |
MPV |
Video |
1 |
90000 |
MPEG-1 and MPEG-2 video |
RFC 2250 |
33 |
Mp2t |
Audio/Video |
1 |
90000 |
MPEG-2 Transport Stream Video |
RFC 2250 |
34 |
H263 |
Video |
|
90000 |
H.263 video, first version (1996) |
RFC 3551, RFC 2190 |
Dynamic |
H263-1998 |
Video |
|
90000 |
H.263 video, second version (1998) |
RFC 3551, RFC 4629, RFC 2190 |
Dynamic |
H263-2000 |
Video |
|
90000 |
H.263 video, third version (2000) |
RFC 4629 |
Dynamic (or profile) |
H264 |
Video |
|
90000 |
H.264 video (MPEG-4 Part 10) |
RFC 3984 |
Dynamic (or profile) |
Theora |
Video |
|
90000 |
Theora video |
Draft-barbato-avt-rtp-theora-01 |
Dynamic |
Ilbc |
Audio |
1 |
- |
Internet low bitrate codec 13.33 or 15.2 kbit/s |
RFC 3951 |
Dynamic |
PCMA-WB |
Audio |
|
16000 |
ITU-T g.711.1, A-Law. |
RFC 5391 |
Dynamic |
PCMU-WB |
Audio |
|
16000 |
ITU-T g.711.1, µ- Law |
RFC 5391 |
Dynamic |
G718 |
Audio |
|
32000 |
ITU-T g.718 |
Draft-ietf-avt-rtp-g718-03 |
Dynamic |
G719 |
Audio |
(Various) |
48000 |
ITU-T g.719 |
RFC 5404 |
Dynamic |
G7221 |
Audio |
|
16 or 32 kHz |
ITU-T g.722.1 |
RFC 5577 |
Dynamic |
G726-16 |
Audio |
1 |
8000 |
ITU-T g.726 audio with 16 kbit/s |
RFC 3551 |
Dynamic |
G726-24 |
Audio |
1 |
8000 |
ITU-T g.726 audio with 24 kbit/s |
RFC 3551 |
Dynamic |
G726-32 |
Audio |
1 |
8000 |
ITU-T g.726 audio with 32 kbit/s |
RFC 3551 |
Dynamic |
G726-40 |
Audio |
1 |
8000 |
ITU-T g.726 audio with 40 kbit/s |
RFC 3551 |
Dynamic |
G729d |
Audio |
1 |
8000 |
ITU-T g.729 Annex D. |
RFC 3551 |
Dynamic |
G729e |
Audio |
1 |
8000 |
ITU-T g.729 Annex E. |
RFC 3551 |
Dynamic |
G7291 |
Audio |
|
(Various) |
ITU-T g.729.1. |
RFC 4749 |
Dynamic |
GSM-EFR |
Audio |
1 |
8000 |
ITU-T GSM-EFR (GSM 06.60) |
RFC 3551 |
Dynamic |
GSM-HR-08 |
Audio |
1 |
8000 |
ITU-T GSM-HR (GSM 06.20) |
RFC 5993 |
Dynamic (or profile) |
Amr |
Audio |
(Various) |
8000 |
Adaptive Multi-Rate Audio |
RFC 4867 |
Dynamic (or profile) |
AMR-WB |
Audio |
(Various) |
16000 |
Adaptive Multi-Rate Wideband audio (ITU-T. g.722.2) |
RFC 4867 |
Dynamic (or profile) |
AMR-WB + |
Audio |
1, 2 or omit |
72000 |
Extended adaptive multi rate-wideband audio |
RFC 4352 |
Dynamic (or profile) |
Vorbis |
Audio |
(Various) |
From 8 kHz to 192 kHz |
RTP payload format Vorbis encoded audio |
RFC 5215 |
Dynamic (or profile) |
Speex |
Audio |
1 |
8000,160 00 or 32000 |
RTP payload format for Speex Codec |
RFC 5574 |
Dynamic (96-127) |
MPA-robust |
Audio |
|
90000 |
A more loss-tolerant RTP payload format MP3 audio |
RFC 5219 |
Dynamic (or profile) |
MP4A-LATM |
Audio |
|
90000 or others |
RTP payload format Audio MPEG-4 |
RFC 3016 |
Dynamic (or profile) |
MP4V-ES |
Video |
|
90000 or others |
RTP payload format MPEG-4 visual |
RFC 3016 |
Dynamic (or profile) |
Mpeg4-generic |
Audio/Video |
|
90000 or other |
RTP payload format for transport MPEG-4 elementary streams |
RFC 3640 |
Dynamic |
L8 |
Audio |
(Various) |
(Various) |
Linear PCM 8-bit audio with 128 offset |
RFC 3551 section 4.5.10 and table 5 |
Dynamic |
Dat12 |
Audio |
(Various) |
8000,110 25, 16000,220 50, 24000,320 00, 44100,480 00 or others |
IEC 61119 12-bit nonlinear audio |
RFC 3190 section 3 |
Dynamic |
L16 |
Audio |
(Various) |
8000,110 25, 16000,220 50, 24000,320 00, 44100,480 00 or others |
Linear PCM 16-bit audio |
RFC 3551 section 4.5.11, RFC 2586 |
Dynamic |
L20 |
Audio |
(Various) |
8000,110 25, 16000,220 50, 24000,320 00, 44100,480 00 or others |
Linear PCM 20-bit audio |
RFC 3190 section 4 |
Dynamic |
L24 |
Audio |
(Various) |
8000,110 25, 16000,220 50, 24000,320 00, 44100,480 00 or others |
Linear PCM 24-bit audio |
RFC 3190 section 4 |