Package com.avpkit.mediatool.demos

Class DecodeAndCaptureFrames

java.lang.Object

com.avpkit.mediatool.AMediaListenerMixin

com.avpkit.mediatool.MediaListenerAdapter

com.avpkit.mediatool.demos.DecodeAndCaptureFrames

All Implemented Interfaces:

IMediaListener

public class DecodeAndCaptureFrames
extends MediaListenerAdapter

Using IMediaReader, takes a media container, finds the first video stream, decodes that stream, and then writes video frames out to a PNG image file every 5 seconds, based on the video presentation timestamps.

Author:

aclarke, trebor

Field Summary

Fields

Modifier and Type	Field	Description
static long	MICRO_SECONDS_BETWEEN_FRAMES	The number of micro-seconds between frames.
static double	SECONDS_BETWEEN_FRAMES	The number of seconds between frames.

Constructor Summary

Constructors

Constructor	Description
DecodeAndCaptureFrames(java.lang.String filename)	Construct a DecodeAndCaptureFrames which reads and captures frames from a video file.

Method Summary

Modifier and Type	Method	Description
static void	main(java.lang.String[] args)	Takes a media container (file) as the first argument, opens it and writes some of it's video frames to PNG image files in the temporary directory.
void	onVideoPicture(IVideoPictureEvent event)	Called after a video frame has been decoded from a media stream.

Methods inherited from class com.avpkit.mediatool.MediaListenerAdapter

onAddStream, onAudioSamples, onClose, onCloseCoder, onFlush, onOpen, onOpenCoder, onReadPacket, onWriteHeader, onWritePacket, onWriteTrailer

Methods inherited from class java.lang.Object

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

Field Detail

SECONDS_BETWEEN_FRAMES

public static final double SECONDS_BETWEEN_FRAMES

The number of seconds between frames.

See Also:

Constant Field Values

MICRO_SECONDS_BETWEEN_FRAMES

public static final long MICRO_SECONDS_BETWEEN_FRAMES

The number of micro-seconds between frames.

Constructor Detail

DecodeAndCaptureFrames

public DecodeAndCaptureFrames(java.lang.String filename)

Construct a DecodeAndCaptureFrames which reads and captures frames from a video file.

Parameters:

filename - the name of the media file to read

Method Detail

main

public static void main(java.lang.String[] args)

Takes a media container (file) as the first argument, opens it and writes some of it's video frames to PNG image files in the temporary directory.

Parameters:

args - must contain one string which represents a filename

onVideoPicture

public void onVideoPicture(IVideoPictureEvent event)

Called after a video frame has been decoded from a media stream. Optionally a BufferedImage version of the frame may be passed if the calling IMediaReader instance was configured to create BufferedImages. This method blocks, so return quickly.

Specified by:

onVideoPicture in interface IMediaListener

Overrides:

onVideoPicture in class MediaListenerAdapter

Parameters:

event - An event containing either an IVideoPicture, a BufferedImage, or both. The IVideoPicture is only valid for the duration of this callback. If you need to access it after you return, you must either copy the data into your own buffers, or call IVideoPicture.copyReference() to get your own reference to the data.