AacMuxer

Kotlin |Java

@UnstableApi
public final class AacMuxer implements Muxer

A muxer for creating an AAC (Advanced Audio Coding) container file.

This muxer supports muxing of AAC audio codec.

Summary

Public constructors
`AacMuxer(FileOutputStream outputStream)` Creates an `AacMuxer` instance.

Public methods
`void`	`addMetadataEntry(Metadata.Entry metadataEntry)` Adds metadata about the output file.
`int`	`addTrack(Format format)` Add an `AAC audio` track.
`void`	`close()` Closes the file.
`void`	`writeSampleData( int trackId, ByteBuffer byteBuffer, BufferInfo bufferInfo )` Writes encoded sample data.

abstract void

close()

public AacMuxer(FileOutputStream outputStream)

Creates an AacMuxer instance.

Parameters
`FileOutputStream outputStream`	The `FileOutputStream` where the output will be written.

public void addMetadataEntry(Metadata.Entry metadataEntry)

Adds metadata about the output file.

This operation is not supported for AAC muxing and will always throw an .

public int addTrack(Format format)

Add an AAC audio track.

Parameters
`Format format`	The `Format` of the track.

Returns
`int`	A track id for this track, which should be passed to `writeSampleData`.

public void close()

Closes the file.

The muxer cannot be used anymore once this method returns.

Throws
`androidx.media3.muxer.MuxerException`	If the muxer fails to finish writing the output.

public void writeSampleData(
    int trackId,
    ByteBuffer byteBuffer,
    BufferInfo bufferInfo
)

Writes encoded sample data.

Parameters
`int trackId`	The track id, previously returned by `addTrack`.
`ByteBuffer byteBuffer`	A buffer containing the sample data to write to the container.
`BufferInfo bufferInfo`	The `BufferInfo` of the sample.

Throws
`androidx.media3.muxer.MuxerException`	If the muxer fails to write the sample.