XMediaLib.SDP.Codec (xmedialib v0.3.0)

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RTP dynamic payload mapping (a=rtpmap:).

What problem this solves

Dynamic RTP payload types in the m= format list need a=rtpmap: lines naming the codec and clock rate (for example Opus at 48000 Hz). This struct captures one rtpmap binding for codec negotiation and SFU routing.

Maps an RTP payload type number to a codec name, clock rate, and optional encoding parameters (channels for audio).

Wire form: a=rtpmap:<pt> <encoding>/<clock>[/encoding-params]

RFCs

Summary

Types

t()

Payload type, codec name, clock rate, and optional encoding parameters.

Types

t()

@type t() :: %XMediaLib.SDP.Codec{
  clock_rate: non_neg_integer(),
  encoding_params: String.t() | nil,
  name: String.t(),
  payload_type: non_neg_integer()
}

Payload type, codec name, clock rate, and optional encoding parameters.

Fields

  • :payload_type - dynamic RTP payload type from the m= format list
  • :name - codec name, e.g. opus or VP8
  • :clock_rate - RTP timestamp clock in Hz
  • :encoding_params - optional third slash field (often channel count)