Membrane element that encodes raw audio frames to G711 format (A-law and μ-law are supported). It is backed by encoder from FFmpeg.

The element expects that each received buffer has whole samples, so the parser (Membrane.Element.RawAudio.Parser) may be required in a pipeline before the encoder. The amount of samples in a buffer may vary.

Additionally, the encoder has to receive proper stream_format (see accepted format on input pad) before any encoding takes place.

Element options

Passed via struct Membrane.G711.FFmpeg.Encoder.t/0

• encoding

  :PCMA | :PCMU

  Default value: :PCMA
  G.711 encoding to use (A-law or μ-law)

Pads

:input

Accepted formats:

%RawAudio{channels: G711.num_channels(), sample_rate: G711.sample_rate(), sample_format: :s16le}

:output

Accepted formats:

%G711{encoding: encoding} when encoding in [:PCMA, :PCMU]