Class Track
- java.lang.Object
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- com.google.android.exoplayer2.extractor.mp4.Track
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public final class Track extends Object
Encapsulates information describing an MP4 track.
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Nested Class Summary
Nested Classes Modifier and Type Class Description static interface
Track.Transformation
The transformation to apply to samples in the track, if any.
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Field Summary
Fields Modifier and Type Field Description long
durationUs
The duration of the track in microseconds, orC.TIME_UNSET
if unknown.long[]
editListDurations
Durations of edit list segments in the movie timescale.long[]
editListMediaTimes
Media times for edit list segments in the track timescale.Format
format
The format.int
id
The track identifier.long
movieTimescale
The movie timescale.int
nalUnitLengthFieldLength
For H264 video tracks, the length in bytes of the NALUnitLength field in each sample.@com.google.android.exoplayer2.extractor.mp4.Track.Transformation int
sampleTransformation
One ofTRANSFORMATION_*
.long
timescale
The track timescale, defined as the number of time units that pass in one second.static int
TRANSFORMATION_CEA608_CDAT
A transformation for caption samples in cdat atoms.static int
TRANSFORMATION_NONE
A no-op sample transformation.@com.google.android.exoplayer2.C.TrackType int
type
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Constructor Summary
Constructors Constructor Description Track(int id, @com.google.android.exoplayer2.C.TrackType int type, long timescale, long movieTimescale, long durationUs, Format format, @com.google.android.exoplayer2.extractor.mp4.Track.Transformation int sampleTransformation, TrackEncryptionBox[] sampleDescriptionEncryptionBoxes, int nalUnitLengthFieldLength, long[] editListDurations, long[] editListMediaTimes)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Track
copyWithFormat(Format format)
TrackEncryptionBox
getSampleDescriptionEncryptionBox(int sampleDescriptionIndex)
Returns theTrackEncryptionBox
for the given sample description index.
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Field Detail
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TRANSFORMATION_NONE
public static final int TRANSFORMATION_NONE
A no-op sample transformation.- See Also:
- Constant Field Values
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TRANSFORMATION_CEA608_CDAT
public static final int TRANSFORMATION_CEA608_CDAT
A transformation for caption samples in cdat atoms.- See Also:
- Constant Field Values
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id
public final int id
The track identifier.
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type
public final @com.google.android.exoplayer2.C.TrackType int type
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timescale
public final long timescale
The track timescale, defined as the number of time units that pass in one second.
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movieTimescale
public final long movieTimescale
The movie timescale.
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durationUs
public final long durationUs
The duration of the track in microseconds, orC.TIME_UNSET
if unknown.
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format
public final Format format
The format.
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sampleTransformation
public final @com.google.android.exoplayer2.extractor.mp4.Track.Transformation int sampleTransformation
One ofTRANSFORMATION_*
. Defines the transformation to apply before outputting each sample.
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editListDurations
@Nullable public final long[] editListDurations
Durations of edit list segments in the movie timescale. Null if there is no edit list.
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editListMediaTimes
@Nullable public final long[] editListMediaTimes
Media times for edit list segments in the track timescale. Null if there is no edit list.
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nalUnitLengthFieldLength
public final int nalUnitLengthFieldLength
For H264 video tracks, the length in bytes of the NALUnitLength field in each sample. 0 for other track types.
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Constructor Detail
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Track
public Track(int id, @com.google.android.exoplayer2.C.TrackType int type, long timescale, long movieTimescale, long durationUs, Format format, @com.google.android.exoplayer2.extractor.mp4.Track.Transformation int sampleTransformation, @Nullable TrackEncryptionBox[] sampleDescriptionEncryptionBoxes, int nalUnitLengthFieldLength, @Nullable long[] editListDurations, @Nullable long[] editListMediaTimes)
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Method Detail
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getSampleDescriptionEncryptionBox
@Nullable public TrackEncryptionBox getSampleDescriptionEncryptionBox(int sampleDescriptionIndex)
Returns theTrackEncryptionBox
for the given sample description index.- Parameters:
sampleDescriptionIndex
- The given sample description index- Returns:
- The
TrackEncryptionBox
for the given sample description index. Maybe null if no such entry exists.
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