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FragmentedMp4Extractor

@UnstableApi
public class FragmentedMp4Extractor implements Extractor


Extracts data from the FMP4 container format.

Summary

Nested types

@Documented
@Retention(value = RetentionPolicy.SOURCE)
@Target(value = TYPE_USE)
@IntDef(flag = true, value = )
public annotation FragmentedMp4Extractor.Flags

Flags controlling the behavior of the extractor.

Constants

static final ExtractorsFactory

Factory for FragmentedMp4Extractor instances.

static final int

Flag to indicate that the extractor should output an event message metadata track.

static final int

Flag to work around an issue in some video streams where every frame is marked as a sync frame.

static final int

Flag to ignore any edit lists in the stream.

static final int

Flag to ignore any tfdt boxes in the stream.

Public constructors

FragmentedMp4Extractor(
    @FragmentedMp4Extractor.Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster
)
FragmentedMp4Extractor(
    @FragmentedMp4Extractor.Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster,
    @Nullable Track sideloadedTrack
)
FragmentedMp4Extractor(
    @FragmentedMp4Extractor.Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster,
    @Nullable Track sideloadedTrack,
    List<Format> closedCaptionFormats
)
FragmentedMp4Extractor(
    @FragmentedMp4Extractor.Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster,
    @Nullable Track sideloadedTrack,
    List<Format> closedCaptionFormats,
    @Nullable TrackOutput additionalEmsgTrackOutput
)

Public methods

void

Initializes the extractor with an ExtractorOutput.

int
read(ExtractorInput input, PositionHolder seekPosition)

Extracts data read from a provided ExtractorInput.

void

Releases all kept resources.

void
seek(long position, long timeUs)

Notifies the extractor that a seek has occurred.

boolean

Returns whether this extractor can extract samples from the ExtractorInput, which must provide data from the start of the stream.

Protected methods

@Nullable Track

Inherited Constants

From androidx.media3.extractor.Extractor
static final int

Returned by read if the ExtractorInput passed to the next read is required to provide data continuing from the position in the stream reached by the returning call.

static final int

Returned by read if the end of the was reached.

static final int

Returned by read if the ExtractorInput passed to the next read is required to provide data starting from a specified position in the stream.

Constants

FACTORY

public static final ExtractorsFactory FACTORY

Factory for FragmentedMp4Extractor instances.

FLAG_ENABLE_EMSG_TRACK

public static final int FLAG_ENABLE_EMSG_TRACK = 4

Flag to indicate that the extractor should output an event message metadata track. Any event messages in the stream will be delivered as samples to this track.

FLAG_WORKAROUND_EVERY_VIDEO_FRAME_IS_SYNC_FRAME

public static final int FLAG_WORKAROUND_EVERY_VIDEO_FRAME_IS_SYNC_FRAME = 1

Flag to work around an issue in some video streams where every frame is marked as a sync frame. The workaround overrides the sync frame flags in the stream, forcing them to false except for the first sample in each segment.

This flag does nothing if the stream is not a video stream.

FLAG_WORKAROUND_IGNORE_EDIT_LISTS

public static final int FLAG_WORKAROUND_IGNORE_EDIT_LISTS = 16

Flag to ignore any edit lists in the stream.

FLAG_WORKAROUND_IGNORE_TFDT_BOX

public static final int FLAG_WORKAROUND_IGNORE_TFDT_BOX = 2

Flag to ignore any tfdt boxes in the stream.

Public constructors

FragmentedMp4Extractor

public FragmentedMp4Extractor()

FragmentedMp4Extractor

public FragmentedMp4Extractor(@FragmentedMp4Extractor.Flags int flags)
Parameters
@FragmentedMp4Extractor.Flags int flags

Flags that control the extractor's behavior.

FragmentedMp4Extractor

public FragmentedMp4Extractor(
    @FragmentedMp4Extractor.Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster
)
Parameters
@FragmentedMp4Extractor.Flags int flags

Flags that control the extractor's behavior.

@Nullable TimestampAdjuster timestampAdjuster

Adjusts sample timestamps. May be null if no adjustment is needed.

FragmentedMp4Extractor

public FragmentedMp4Extractor(
    @FragmentedMp4Extractor.Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster,
    @Nullable Track sideloadedTrack
)
Parameters
@FragmentedMp4Extractor.Flags int flags

Flags that control the extractor's behavior.

@Nullable TimestampAdjuster timestampAdjuster

Adjusts sample timestamps. May be null if no adjustment is needed.

@Nullable Track sideloadedTrack

Sideloaded track information, in the case that the extractor will not receive a moov box in the input data. Null if a moov box is expected.

FragmentedMp4Extractor

public FragmentedMp4Extractor(
    @FragmentedMp4Extractor.Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster,
    @Nullable Track sideloadedTrack,
    List<Format> closedCaptionFormats
)
Parameters
@FragmentedMp4Extractor.Flags int flags

Flags that control the extractor's behavior.

@Nullable TimestampAdjuster timestampAdjuster

Adjusts sample timestamps. May be null if no adjustment is needed.

@Nullable Track sideloadedTrack

Sideloaded track information, in the case that the extractor will not receive a moov box in the input data. Null if a moov box is expected.

List<Format> closedCaptionFormats

For tracks that contain SEI messages, the formats of the closed caption channels to expose.

FragmentedMp4Extractor

public FragmentedMp4Extractor(
    @FragmentedMp4Extractor.Flags int flags,
    @Nullable TimestampAdjuster timestampAdjuster,
    @Nullable Track sideloadedTrack,
    List<Format> closedCaptionFormats,
    @Nullable TrackOutput additionalEmsgTrackOutput
)
Parameters
@FragmentedMp4Extractor.Flags int flags

Flags that control the extractor's behavior.

@Nullable TimestampAdjuster timestampAdjuster

Adjusts sample timestamps. May be null if no adjustment is needed.

@Nullable Track sideloadedTrack

Sideloaded track information, in the case that the extractor will not receive a moov box in the input data. Null if a moov box is expected.

List<Format> closedCaptionFormats

For tracks that contain SEI messages, the formats of the closed caption channels to expose.

@Nullable TrackOutput additionalEmsgTrackOutput

An extra track output that will receive all emsg messages targeting the player, even if FLAG_ENABLE_EMSG_TRACK is not set. Null if special handling of emsg messages for players is not required.

Public methods

init

public void init(ExtractorOutput output)

Initializes the extractor with an ExtractorOutput. Called at most once.

Parameters
ExtractorOutput output

An ExtractorOutput to receive extracted data.

read

public int read(ExtractorInput input, PositionHolder seekPosition)

Extracts data read from a provided ExtractorInput. Must not be called before init.

A single call to this method will block until some progress has been made, but will not block for longer than this. Hence each call will consume only a small amount of input data.

In the common case, RESULT_CONTINUE is returned to indicate that the passed to the next read is required to provide data continuing from the position in the stream reached by the returning call. If the extractor requires data to be provided from a different position, then that position is set in seekPosition and RESULT_SEEK is returned. If the extractor reached the end of the data provided by the ExtractorInput, then RESULT_END_OF_INPUT is returned.

When this method throws an IOException, extraction may continue by providing an ExtractorInput with an unchanged read position to a subsequent call to this method.

Parameters
ExtractorInput input

The ExtractorInput from which data should be read.

PositionHolder seekPosition

If RESULT_SEEK is returned, this holder is updated to hold the position of the required data.

Returns
int

One of the RESULT_ values defined in this interface.

Throws
java.io.IOException java.io.IOException

If an error occurred reading from or parsing the input.

release

public void release()

Releases all kept resources.

seek

public void seek(long position, long timeUs)

Notifies the extractor that a seek has occurred.

Following a call to this method, the ExtractorInput passed to the next invocation of read is required to provide data starting from position in the stream. Valid random access positions are the start of the stream and positions that can be obtained from any SeekMap passed to the ExtractorOutput.

Parameters
long position

The byte offset in the stream from which data will be provided.

long timeUs

The seek time in microseconds.

sniff

public boolean sniff(ExtractorInput input)

Returns whether this extractor can extract samples from the ExtractorInput, which must provide data from the start of the stream.

If true is returned, the input's reading position may have been modified. Otherwise, only its peek position may have been modified.

Parameters
ExtractorInput input

The ExtractorInput from which data should be peeked/read.

Returns
boolean

Whether this extractor can read the provided input.

Throws
java.io.IOException java.io.IOException

If an error occurred reading from the input.

Protected methods

modifyTrack

protected @Nullable Track modifyTrack(@Nullable Track track)