Parser for Advanced Audio Codec.

Supports both plain and ADTS-encapsulated output (configured by out_encapsulation). Input with encapsulation :none is supported, but correct AAC stream format needs to be supplied with the stream.

If PTS is absent, it calculates and puts one based on the sample rate.

Element options

Passed via struct Membrane.AAC.Parser.t/0

• samples_per_frame

  AAC.samples_per_frame()

  Default value: 1024
  Count of audio samples in each AAC frame

• out_encapsulation

  AAC.encapsulation()

  Default value: :ADTS
  Determines whether output AAC frames should be prefixed with ADTS headers

• audio_specific_config

  binary() | nil

  Default value: nil
  Decoder configuration data AudioSpecificConfig(), as defined in ISO/IEC 14496-3 - if received via side channel it should be provided via this option.

• output_config

  :audio_specific_config
  | :esds
  | {:esds, avg_bit_rate :: non_neg_integer(), max_bit_rate :: non_neg_integer()}
  | nil

  Default value: nil
  Determines which config spec will be generated and included in output stream format as config:

  • esds - the field will be an esds MP4 atom. avg_bit_rate and max_bit_rate can be additionally provided and will be included in the esds. If not provided they will be set to 0.
  • audio_specific_config - the field will be a decoder configuration data AudioSpecificConfig(), as defined in ISO/IEC 14496-3.

Pads

:input

Accepted formats:

AAC

Membrane.RemoteStream

:output

Accepted formats:

AAC