Muxer

Kotlin |Java

@UnstableApi
public interface Muxer extends AutoCloseable

Known direct subclasses

`AacMuxer`	A muxer for creating an AAC (Advanced Audio Coding) container file.
`DefaultMuxer`	A default `Muxer` implementation.
`FragmentedMp4Muxer`	A muxer for creating a fragmented MP4 file.
`FrameworkMuxer`	`Muxer` implementation that uses a `MediaMuxer`.
`InAppFragmentedMp4Muxer`	`Muxer` implementation that uses a `FragmentedMp4Muxer`.
`InAppMp4Muxer`	`Muxer` implementation that uses an `Mp4Muxer`.
`Mp4Muxer`	A muxer for creating an MP4 container file.
`WebmMuxer`	A muxer for creating a WebM container file.

A muxer for producing media container files.

Summary

Nested types
`public interface Muxer.Factory` Factory for muxers.

Public methods
`abstract void`	`addMetadataEntry(Metadata.Entry metadataEntry)` Adds `metadata` about the output file.
`abstract int`	`addTrack(Format format)` Adds a track of the given media format.
`abstract void`	`close()` Closes the file.
`abstract void`	`writeSampleData( int trackId, ByteBuffer byteBuffer, BufferInfo bufferInfo )` Writes encoded sample data.

abstract void addMetadataEntry(Metadata.Entry metadataEntry)

Adds metadata about the output file.

abstract int addTrack(Format format)

Adds a track of the given media format.

All tracks must be added before any samples are written to any track.

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

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

Throws
`androidx.media3.muxer.MuxerException`	If the muxer encounters a problem while adding the track.

abstract 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.

abstract 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.