Payload Types for Standard Audio and Visual Encodings
The following is a table of standard audio and visual payload encodings defined in H. Schulzrinne, GND Fokus, RTP Profile for Audio and Visual Conferences with Minimal Control, RFC 1890, and in the RTP Parameters document in IANA’s Directory of Generally Assigned Numbers.
| Payload Type | Encoding Name | Audio (A)/Visual (V) | Clock Rate (Hz) |
|---|---|---|---|
| 0 | PCMU | A | 8000 |
| 1 | 1016 | A | 8000 |
| 2 | G721 | A | 8000 |
| 3 | GSM | A | 8000 |
| 4 | G723 | A | 8000 |
| 5 | DVI4 | A | 8000 |
| 6 | DVI4 | A | 16000 |
| 7 | LPC | A | 8000 |
| 8 | PCMA | A | 8000 |
| 9 | G722 | A | 8000 |
| 10 | L16 | A | 44100 |
| 11 | L16 | A | 44100 |
| 12 | QCELP | A | 8000 |
| 13 | reserved | A | |
| 14 | MPA | A | 90000 |
| 15 | G728 | A | 8000 |
| 16 | DVI4 | A | 11025 |
| 17 | DVI4 | A | 22050 |
| 18 | G729 | A | 8000 |
| 19 | reserved | A | |
| 20 | unassigned | A | |
| 21 | unassigned | A | |
| 22 | unassigned | A | |
| 23 | unassigned | A | |
| dyn | GSM-HR | A | 8000 |
| dyn | GSM-EFR | A | 8000 |
| dyn | L8 | A | var. |
| dyn | RED | A | |
| dyn | VDVI | A | var. |
| 24 | unassigned | V | |
| 25 | CelB | V | 90000 |
| 26 | JPEG | V | 90000 |
| 27 | unassigned | V | |
| 28 | nv | V | 90000 |
| 29 | unassigned | V | |
| 30 | unassigned | V | |
| 31 | H261 | V | 90000 |
| 32 | MPV | V | 90000 |
| 33 | MP2T | AV | 90000 |
| 34 | H263 | V | 90000 |
| 35-71 | unassigned | ? | |
| 72-76 | reserved for RTCP conflict avoidance | N/A | N/A |
| 77-95 | unassigned | ? | |
| 96-127 | dynamic | ? | |
| dyn | BT656 | V | 90000 |
| dyn | H263-1998 | V | 90000 |
| dyn | MP1S | V | 90000 |
| dyn | MP2P | V | 90000 |
| dyn | BMPEG | V | 90000 |
