Interface Fmp4AacConfig

An AAC track's decoder configuration, from the AudioSpecificConfig in its esds box.

interface Fmp4AacConfig {
    Channels: number;
    FrameLength: number;
    ObjectType: number;
    SampleRate: number;
    SampleRateIndex: number;
}

Properties

Channels: number

The channel configuration: 1 for mono, 2 for stereo.

FrameLength: number

Samples per channel each frame decodes to: 1024, or 960 when the config's frame length flag is set.

ObjectType: number

The audio object type: 2 for AAC-LC.

SampleRate: number

The sample rate, in Hz.

SampleRateIndex: number

The sampling frequency index (ISO/IEC 14496-3), or 15 when the rate is written out.