AudioStreamInfo

The AudioStreamInfo class describes an elementary audio stream.

The media type is always MediaType.Audio and cannot be changed.

Class

class avblocks.AudioStreamInfo

Bases: StreamInfo

Describes an elementary audio stream.

The media type is always MediaType.Audio and cannot be changed.

property bits_per_sample: int

The number of valid bits per sample (sample resolution).

Common values are 8, 16, 20, 24 and 32.

Normally BitsPerSample is defined only for uncompressed audio streams. For compressed audio it is not defined and is 0. However it is possible for a compressed audio stream to return a positive value as an indication of audio quality. It can also designate the bits per sample of the LPCM stream once the compressed stream is decoded.

property bytes_per_frame: int

The number of bytes occupied by an audio frame (smallest discrete unit).

A frame is the smallest discrete unit in an audio stream. It may contain one or more samples. Depending on the audio stream type the frame may contain fixed or variable number of samples.

For compressed streams the frame size is variable even if there are fixed number of samples in each frame. In this case BytesPerFrame is 0.

For an LPCM stream the frame size is constant. In this case BytesPerFrame is greater than 0. Normally for interleaved LPCM streams the following is true: - BytesPerFrame / ChannelCount == SampleSize - The valid bits in a sample are given by BitsPerSample and they are

aligned towards the hi-order byte.

property channel_layout: AudioChannelFlags

The channel layout defines the mapping between channels and speakers.

property channels: int

The number of audio channels in the stream.

clone() → AudioStreamInfo

Creates a deep copy of this object.

Returns:

A new AudioStreamInfo object

property pcm_flags: PcmFlags

Various properties of the audio stream.

reset()

Resets the audio stream information to its default state.

property sample_rate: int

The audio sample rate in Hz.