com.googlecode.mp4parser.authoring.tracks

Class H264TrackImpl

java.lang.Object

com.googlecode.mp4parser.authoring.AbstractTrack

com.googlecode.mp4parser.authoring.tracks.H264TrackImpl

All Implemented Interfaces:

Track

public class H264TrackImpl
extends AbstractTrack

The H264TrackImpl creates a Track from an H.264 Annex B file.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	H264TrackImpl.ByteBufferBackedInputStream
protected class	H264TrackImpl.CleanInputStream
class	H264TrackImpl.SEIMessage
static class	H264TrackImpl.SliceHeader

Constructor Summary

Constructors

Constructor and Description
H264TrackImpl(DataSource fc)
H264TrackImpl(DataSource fc, String lang)
H264TrackImpl(DataSource fc, String lang, long timescale, int frametick) Creates a new Track object from a raw H264 source (DataSource fc).

Method Summary

Methods

Modifier and Type	Method and Description
protected InputStream	cleanBuffer(InputStream is)
protected Sample	createSample(List<? extends ByteBuffer> buffers) Builds the sample by prepending the length of each buffer to the data
List<CompositionTimeToSample.Entry>	getCompositionTimeEntries()
String	getHandler()
AbstractMediaHeaderBox	getMediaHeaderBox()
List<SampleDependencyTypeBox.Entry>	getSampleDependencies()
SampleDescriptionBox	getSampleDescriptionBox()
long[]	getSampleDurations() Each samples is covers a small time span in a video.
List<Sample>	getSamples()
long[]	getSyncSamples()
TrackMetaData	getTrackMetaData()

Methods inherited from class com.googlecode.mp4parser.authoring.AbstractTrack

getDuration, getSubsampleInformationBox

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

H264TrackImpl

public H264TrackImpl(DataSource fc,
             String lang,
             long timescale,
             int frametick)
              throws IOException

Creates a new Track object from a raw H264 source (DataSource fc). Whenever the timescale and frametick are set to negative value (e.g. -1) the H264TrackImpl tries to detect the frame rate. Typically values for timescale and frametick are:

• 23.976 FPS: timescale = 24000; frametick = 1001
• 25 FPS: timescale = 25; frametick = 1
• 29.97 FPS: timescale = 30000; frametick = 1001
• 30 FPS: timescale = 30; frametick = 1

Parameters:

fc - the source file of the H264 samples

lang - language of the movie (in doubt: use "eng")

timescale - number of time units (ticks) in one second

frametick - number of time units (ticks) that pass while showing exactly one frame

Throws:

IOException - in case of problems whiel reading from the DataSource

H264TrackImpl

public H264TrackImpl(DataSource fc,
             String lang)
              throws IOException

Throws:

IOException

H264TrackImpl

public H264TrackImpl(DataSource fc)
              throws IOException

Throws:

IOException

Method Detail

getSampleDescriptionBox

public SampleDescriptionBox getSampleDescriptionBox()

getCompositionTimeEntries

public List<CompositionTimeToSample.Entry> getCompositionTimeEntries()

Specified by:

getCompositionTimeEntries in interface Track

Overrides:

getCompositionTimeEntries in class AbstractTrack

getSyncSamples

public long[] getSyncSamples()

Specified by:

getSyncSamples in interface Track

Overrides:

getSyncSamples in class AbstractTrack

getSampleDependencies

public List<SampleDependencyTypeBox.Entry> getSampleDependencies()

Specified by:

getSampleDependencies in interface Track

Overrides:

getSampleDependencies in class AbstractTrack

getTrackMetaData

public TrackMetaData getTrackMetaData()

getHandler

public String getHandler()

getSamples

public List<Sample> getSamples()

getMediaHeaderBox

public AbstractMediaHeaderBox getMediaHeaderBox()

createSample

protected Sample createSample(List<? extends ByteBuffer> buffers)

Builds the sample by prepending the length of each buffer to the data

Parameters:

buffers -

Returns:

cleanBuffer

protected InputStream cleanBuffer(InputStream is)

getSampleDurations

public long[] getSampleDurations()

Description copied from interface: Track

Each samples is covers a small time span in a video. This method returns the duration for each sample in track timescale. The array must contain exactly as many samples as Track.getSamples() contains.

Returns:

an array of ticks