---
name: "payload"
section: "3"
platform: "linux"
package: "libccrtp-doc"
version: "2.0.9-4.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/payload"
---

# payload(3)

Payload types and formats.

## NAME

payload - Payload types and formats.

## SYNOPSIS

### Classes

class **PayloadFormat**\
 Base payload format class.  class **StaticPayloadFormat**\
 Static payload format objects.  class **DynamicPayloadFormat**\
 Dynamic payload format objects.

### Typedefs

typedef uint8 **PayloadType**\
 RTP payload type numeric identifier.

### Enumerations

enum **StaticPayloadType** { **sptPCMU** = 0, **firstStaticPayloadType** = sptPCMU, **sptG726\_32** = 2, **sptGSM**, **sptG723**, **sptDVI4\_8000**, **sptDVI4\_16000**, **sptLPC**, **sptPCMA**, **sptG722**, **sptL16\_DUAL**, **sptL16\_MONO**, **sptQCELP**, **sptMPA** = 14, **sptG728**, **sptDVI4\_11025**, **sptDVI4\_22050**, **sptG729**, **lastStaticAudioPayloadType** = sptG729, **sptCELB** = 25, **sptJPEG**, **sptNV** = 28, **sptH261** = 31, **sptMPV**, **sptMP2T**, **sptH263**, **lastStaticPayloadType** = sptH263 }\
 RTP static payload types (default bindings) defined in the AVP profile.

### Variables

const **PayloadType** **ptINVALID** = 128\
 Predefined value for invalid or uninitialized payload type variables.

## Detailed Description

## Typedef Documentation

### PayloadType

RTP payload type numeric identifier. At the RTP level a payload format is identified with a 7 bit number. This number is binded to a payload format through non-RTP means (SIP, SAP, application specific rules, etc.)

## Enumeration Type Documentation

### enum StaticPayloadType

RTP static payload types (default bindings) defined in the AVP profile.

**Enumerator**

- *sptPCMU*

  *ITU-T G.711. mu-law audio 8 Khz (RFC 1890)*

- *firstStaticPayloadType*

  - *sptG726\_32*

  *ITU-T G.726. ADPCM audio (RFC 1890)*

- *sptGSM*

  *GSM audio (RFC 1890)*

- *sptG723*

  *ITU-T G.723. MP-MLQ ACELP audio (RFC 1890)*

- *sptDVI4\_8000*

  *Modified IMA ADPCM audio 8Khz (RFC 1890)*

- *sptDVI4\_16000*

  *Modified IMA ADPCM audio 16Khz (RFC 1890)*

- *sptLPC*

  *LPC audio (RFC 1890)*

- *sptPCMA*

  *ITU-T G.711 A-law audio 8 Khz (RFC 1890)*

- *sptG722*

  *Audio (RFCs 1890, 3047)*

- *sptL16\_DUAL*

  *Linear uncompressed dual audio (RFC 1890)*

- *sptL16\_MONO*

  *Linear uncompressed mono audio (RFC 1890)*

- *sptQCELP*

  *Audio at 8000 hz.*

- *sptMPA*

  *MPEG Audio elem. stream (RFCs 1890, 2250)*

- *sptG728*

  *ITU-T G.728. LD-CELP audio.*

- *sptDVI4\_11025*

  *DVI audio at 11025 hz (by Joseph Di Pol)*

- *sptDVI4\_22050*

  *DVI audio at 22050 hz (by Joseph Di Pol)*

- *sptG729*

  *ITU-T G.729. CS-ACELP audio.*

- *lastStaticAudioPayloadType*

  - *sptCELB*

  *Sun's propietary video (RFCs 1890, 2029)*

- *sptJPEG*

  *JPEG (ISO 10918) video (RFCs 1890, 2435)*

- *sptNV*

  *Ron Frederick's nv audio (RFC 1890)*

- *sptH261*

  *ITU-T H.261 video (RFCs 1890, 2032)*

- *sptMPV*

  *MPEG Video elem. stream (RFCs 1890, 2250)*

- *sptMP2T*

  *MPEG 2 Transport stream (RFCs 1890, 2250)*

- *sptH263*

  *ITU-T H.263 video (RFCs 2190, 2429)*

- *lastStaticPayloadType*

  ## Variable Documentation

### const PayloadType ptINVALID = 128

*Predefined value for invalid or uninitialized payload type variables.*

## Author

*Generated automatically by Doxygen for ccRTP from the source code.*