Element that combines multiple streams into a single RTP stream.

Each new input stream is assigned a unique SSRC that the packets transporting this stream will have. The demuxer will try to resolve what payload_type and clock_rate should be assumed based on the incoming stream format and passed pad options. Timestamps are calculated based on assumed clock_rate.

Element options

Passed via struct Membrane.RTP.Muxer.t/0

• payload_type_mapping

  RTP.PayloadFormat.payload_type_mapping()

  Default value: %{}
  Mapping of the custom RTP payload types ( > 95).

• srtp

  false | [ExLibSRTP.Policy.t()]

  Default value: false
  Specifies whether to use SRTP to encrypt the output stream. Requires adding srtp dependency to work. If true takes a list of SRTP policies to use for encrypting packets. See ExLibSRTP.Policy.t/0 for details.

Pads

:input

Accepted formats:

RTP

Pad options:

• ssrc

  RTP.ssrc() | :random

  Default value: :random
  SSRC that this stream will be assigned. If not provided, a random free value will be assigned.

• initial_sequence_number

  ExRTP.Packet.uint16() | :random

  Default value: :random
  Sequence number that will be assigned to the first packet of this stream. Sequence numbers of subsequent packets will be determined by incrementing this value. This value should be generated randomly to prevent known payload attacks.

• initial_timestamp

  ExRTP.Packet.uint16() | :random

  Default value: :random
  RTP Timestamp that will be assigned to the first packet of this stream. Timestamps of subsequent packets will be calculated starting from this value. This value should be generated randomly to prevent known payload attacks.

• payload_type

  RTP.payload_type() | nil

  Default value: nil
  Payload type of the stream. If not provided, determined from the resolved encoding name.

• encoding

  RTP.encoding_name() | nil

  Default value: nil
  Encoding name of the stream that will be used if the muxer fails to infer it from incoming stream format. Used for determining payload_type, if it wasn't provided.

• clock_rate

  non_neg_integer() | nil

  Default value: nil
  Clock rate to use. If not provided, determined from resolved payload type.

:output

Accepted formats:

%RemoteStream{type: :packetized, content_format: RTP}