> **java -Xms64m -Xms64m VideoRecorder**
> - number of capture devices: 3
> Supported format : rgb, 24-bit, masks=3:2:1, pixelstride=-1,
> linestride=-1, flip
> ped
> Track 0 is set to transmit as:
> RGB, 24-bit, Masks=3:2:1, PixelStride=-1, LineStride=-1, Flipped
> Start datasource handler
> Prefetch the processor
> processor started
> Exception in thread "VFW TransferDataThread"
> java.lang.OutOfMemoryError: Java heap space
以下是代码：
/*
* VideoRecorder.java
*
* Created on Mar 16, 2004
*
*/
//package gov.nist.applet.phone.media.messaging;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Vector;
import javax.media.CaptureDeviceInfo;
import javax.media.CaptureDeviceManager;
import javax.media.ConfigureCompleteEvent;
import javax.media.Controller;
import javax.media.ControllerEvent;
import javax.media.ControllerListener;
import javax.media.EndOfMediaEvent;
import javax.media.Format;
import javax.media.IncompatibleSourceException;
import javax.media.Manager;
import javax.media.MediaLocator;
import javax.media.MediaTimeSetEvent;
import javax.media.PrefetchCompleteEvent;
import javax.media.Processor;
import javax.media.RealizeCompleteEvent;
import javax.media.ResourceUnavailableEvent;
import javax.media.SizeChangeEvent;
import javax.media.StopAtTimeEvent;
import javax.media.StopByRequestEvent;
import javax.media.control.TrackControl;
import javax.media.datasink.DataSinkErrorEvent;
import javax.media.datasink.DataSinkEvent;
import javax.media.datasink.DataSinkListener;
import javax.media.datasink.EndOfStreamEvent;
import javax.media.format.VideoFormat;
import javax.media.protocol.ContentDescriptor;
import javax.media.protocol.DataSource;
import javax.media.protocol.FileTypeDescriptor;
/**
* Class allowing one to record some audio in a buffer
* Play only MPEG_AUDIO and GSM audio data
* With some minor modifications can play RAW data also
*
* @author Jean Deruelle <jean.deruelle@nist.gov>
*
* <a href="{@docRoot}/uncopyright.html">This code is in the public domain.</a>
*/
public class VideoRecorder implements ControllerListener, DataSinkListener, Runnable{
Processor p;
Object waitSync = new Object();
boolean stateTransitionOK = true;
static boolean monitorOn = false;
private MediaLocator videoLocator=null;
boolean bufferingDone = false;
RawDataSourceHandler handler =null;
Thread recorderThread=null;
DataSource ds = null;
/**
* get the devices for the audio capture and print their formats
*/
protected void initialize() {
CaptureDeviceInfo videoCDI=null;
Vector captureDevices=null;
captureDevices= CaptureDeviceManager.getDeviceList(null);
System.out.println("- number of capture devices: "+captureDevices.size() );
CaptureDeviceInfo cdi=null;
for (int i = 0; i < captureDevices.size(); i++) {
cdi = (CaptureDeviceInfo) captureDevices.elementAt(i);
Format[] formatArray=cdi.getFormats();
for (int j = 0; j < formatArray.length; j++) {
Format format=formatArray[j];
if (format instanceof VideoFormat) {
if (videoCDI == null) {
videoCDI=cdi;
}
}
}
}
if(videoCDI!=null)
videoLocator=videoCDI.getLocator();
}
/**
* Set the format of the tracks
* either to MPEG_AUDIO or GSM
*/
protected void setTrackFormat(){
//Get the tracks from the processor
TrackControl[] tracks = p.getTrackControls();
// Do we have atleast one track?
if (tracks == null || tracks.length < 1)
System.out.println("Couldn't find tracks in processor");
// Set the output content descriptor to GSM
// This will limit the supported formats reported from
// Track.getSupportedFormats to only valid AVI formats.
//p.setContentDescriptor(new FileTypeDescriptor(FileTypeDescriptor.MPEG_AUDIO));
p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW));
Format supported[];
Format chosen=null;
boolean atLeastOneTrack = false;
// Program the tracks.
for (int i = 0; i < tracks.length; i++) {
Format format = tracks[i].getFormat();
if (tracks[i].isEnabled()) {
supported = tracks[i].getSupportedFormats();
/*System.out.println("track : "+ i);
for(int j=0;j<supported.length;j++)
System.out.println("Supported format : "+supported[j].getEncoding());*/
// We've set the output content to the GSM.
if (supported.length > 0) {
for(int j=0;j<supported.length;j++){
System.out.println("Supported format : "+supported[j].toString().toLowerCase());
if (supported[j] instanceof VideoFormat) {
if(supported[j].toString().toLowerCase().indexOf("rgb")!=-1){
chosen = supported[j];
break;
}
}
}
if(chosen!=null){
tracks[i].setFormat(chosen);
System.err.println("Track " + i + " is set to transmit as:");
System.err.println(" " + chosen);
atLeastOneTrack = true;
}
else{
System.err.println("Track " + i + " is set to transmit as nothing");
}
} else
tracks[i].setEnabled(false);
} else
tracks[i].setEnabled(false);
}
}
/**
* Given a DataSource, create a processor and hook up the output
* DataSource from the processor to a customed DataSink.
* @return false if something wrong happened
*/
protected boolean record() {
// Create a DataSource given the media locator.
try {
ds = Manager.createDataSource(videoLocator);
} catch (Exception e) {
System.err.println("Cannot create DataSource from: " + videoLocator);
return false;
}
try {
p = Manager.createProcessor(ds);
} catch (Exception e) {
System.err.println("Failed to create a processor from the given DataSource: " + e);
return false;
}
p.addControllerListener(this);
// Put the Processor into configured state.
p.configure();
if (!waitForState(Processor.Configured)) {
System.err.println("Failed to configure the processor.");
return false;
}
setTrackFormat();
/*ContentDescriptor[] descriptors = p.getSupportedContentDescriptors();
for (int n = 0; n < descriptors.length; n++) {
System.out.println("Desc: " + descriptors[n].toString());
}*/
// Get the raw output from the processor.
//p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW));
//p.setContentDescriptor(new FileTypeDescriptor(FileTypeDescriptor.MPEG_AUDIO));
p.realize();
if (!waitForState(Controller.Realized)) {
System.err.println("Failed to realize the processor.");
return false;
}
// Get the output DataSource from the processor and
// hook it up to the RawDataSourceHandler.
DataSource ods = p.getDataOutput();
handler = new RawDataSourceHandler();
try {
handler.setSource(ods);
} catch (IncompatibleSourceException e) {
System.err.println("Cannot handle the output DataSource from the processor: " + ods);
//return false;
}
System.err.println("Start datasource handler ");
handler.addDataSinkListener(this);
try{
handler.setSource(ds);
handler.start();
}
catch(IncompatibleSourceException ioe){
ioe.printStackTrace();
}
System.err.println("Prefetch the processor ");
// Prefetch the processor.
p.prefetch();
if (!waitForState(Controller.Prefetched)) {
System.err.println("Failed to prefetch the processor.");
return false;
}
// Start the processor.
p.start();
System.err.println("processor started");
return true;
}
/**
* Block until file writing is done.
*/
/*private boolean waitForFileDone(double duration) {
synchronized (waitFileSync) {
try {
while (!bufferingDone) {
if(p.getMediaTime().getSeconds() > duration)
p.close();
waitFileSync.wait(500);
System.err.print(".");
}
} catch (Exception e) {}
}
bufferingDone=false;
return true;
}*/
/**
* Block until the processor has transitioned to the given state.
* @param state - the state to wait for
* @return false if the transition failed.
*/
protected boolean waitForState(int state) {
synchronized (waitSync) {
try {
while (p.getState() < state && stateTransitionOK)
waitSync.wait();
} catch (Exception e) {}
}
return stateTransitionOK;
}
/**
* Stop the voice recording
*/
public void stop(){
p.stop();
bufferingDone=true;
}
/**
* Start the voice recording
*/
public void start(){
initialize();
if(recorderThread==null){
recorderThread=new Thread(this);
recorderThread.setName("Voice Recorder Thread");
}
recorderThread.start();
}
/**
* the process of recording the voice
*/
public void run(){
boolean succeeded=record();
if(!succeeded)
return;
while(!bufferingDone){
try{
recorderThread.sleep(1);
}
catch(InterruptedException ie){
ie.printStackTrace();
}
}
try{
Thread.sleep(100);
}
catch(InterruptedException ie){
ie.printStackTrace();
}
//Clean up
System.err.println("closing datasource" );
try{
ds.stop();
}
catch(IOException ioe){
ioe.printStackTrace();
}
ds.disconnect();
System.err.println("closing processor" );
p.close();
p.removeControllerListener(this);
recorderThread=null;
System.err.println("closing handler" );
handler.close();
System.err.println("...done Buffering.");
bufferingDone=false;
}
/**
* Controller Listener Method.
* Allow one to know what happen on the recorder and the voice
* @param evt - event received
*/
public void controllerUpdate(ControllerEvent evt) {
//System.out.println("new Event received"+evt.getClass().getName());
if (evt instanceof ConfigureCompleteEvent ||
evt instanceof RealizeCompleteEvent ||
evt instanceof PrefetchCompleteEvent) {
synchronized (waitSync) {
stateTransitionOK = true;
waitSync.notifyAll();
}
} else if (evt instanceof ResourceUnavailableEvent) {
synchronized (waitSync) {
stateTransitionOK = false;
waitSync.notifyAll();
}
} else if (evt instanceof EndOfMediaEvent) {
System.err.println("closing datasource" );
try{
ds.stop();
}
catch(IOException ioe){
ioe.printStackTrace();
}
ds.disconnect();
System.err.println("closing controller");
evt.getSourceController().close();
//Clean up
System.err.println("closing processor" );
p.close();
p.removeControllerListener(this);
recorderThread=null;
System.err.println("closing handler" );
handler.close();
System.err.println("...done Buffering.");
bufferingDone=true;
} else if (evt instanceof SizeChangeEvent) {
}
else if (evt instanceof MediaTimeSetEvent) {
System.err.println("- mediaTime set: " +
((MediaTimeSetEvent)evt).getMediaTime().getSeconds());
} else if (evt instanceof StopAtTimeEvent) {
System.err.println("- stop at time: " +
((StopAtTimeEvent)evt).getMediaTime().getSeconds());
//Clean up
System.err.println("closing datasource" );
try{
ds.stop();
}
catch(IOException ioe){
ioe.printStackTrace();
}
ds.disconnect();
System.err.println("closing controller");
evt.getSourceController().close();
System.err.println("closing processor" );
p.close();
p.removeControllerListener(this);
recorderThread=null;
System.err.println("closing handler" );
handler.close();
System.err.println("...done Buffering.");
bufferingDone=true;
}
else if (evt instanceof StopByRequestEvent) {
// Clean up
System.err.println("closing datasource" );
try{
ds.stop();
}
catch(IOException ioe){
ioe.printStackTrace();
}
ds.disconnect();
System.err.println("closing controller");
evt.getSourceController().close();
System.err.println("closing processor" );
p.close();
p.removeControllerListener(this);
recorderThread=null;
System.err.println("closing handler" );
handler.close();
System.err.println("...done Buffering.");
}
}
/**
* Get the recorded voice buffer
* @return the voice recorded in an array of bytes
*/
public byte[] getRecord(){
return handler.getRecordBuffer();
}
/**
* DataSink Listener
* @param evt - event received
*/
public void dataSinkUpdate(DataSinkEvent evt) {
if (evt instanceof EndOfStreamEvent) {
bufferingDone = true;
//waitFileSync.notifyAll();
System.err.println("All done!");
evt.getSourceDataSink().close();
//System.exit(0);
}
else if (evt instanceof DataSinkErrorEvent) {
//synchronized (waitFileSync) {
bufferingDone = true;
evt.getSourceDataSink().close();
//waitFileSync.notifyAll();
//}
}
}
/**
* Utility method to write a recorded voice buffer to a file
* @param data - the recorded voice
*/
private static void writeBufferToFile(byte[] data){
File f=new File("D://test.mov");
FileOutputStream fos=null;
try{
fos=new FileOutputStream(f);
}
catch(FileNotFoundException fnfe){
fnfe.printStackTrace();
}
try{
fos.write(data);
}
catch(IOException ioe){
ioe.printStackTrace();
}
}
/**
* Main program
* @param args -
*/
public static void main(String [] args) {
VideoRecorder videoRecorder = new VideoRecorder();
//for(int i=0;i<2;i++){
videoRecorder.start();
try{
Thread.sleep(5000);
}
catch(InterruptedException ie){
ie.printStackTrace();
}
videoRecorder.handler = new RawDataSourceHandler();
//MyCam videoPlayer=new MyCam();
//videoRecorder.stop();
//videoPlayer.initialize();
//videoPlayer.play();
//videoRecorder.initialize();
//videoRecorder.play();
try{
Thread.sleep(5000);
}
catch(InterruptedException ie){
ie.printStackTrace();
}
//}
writeBufferToFile(videoRecorder.getRecord());
}
}
答案 0 :(得分：1)
我会避免亲自使用RawDataSourceHandler。它实际上只是将捕获的数据写入存储器阵列，这可以解释为什么你的内存不足，特别是记录24位RGB。
相反，我建议创建一个临时文件，录制到DataSink，然后将文件重命名到位。 这是我建议的顺序：
File tempFile = File.createTempFile("something",".someFormat");
MediaLocator dest = new MediaLocator(tempFile.toURI().toURL());
DataSink sink = Manager.createDataSink(p.getDataOutput(),dest);
sink.open();
sink.start();
p.start();
// Later:
p.stop();
tempFile.renameTo("SomeNewName.someFormat");
如果由于没有足够的权限从JMF写入文件而无法达到此目的（这与使用流写入文件所需的权限不同），我至少建议使用比未压缩RGB更小的格式。 （我可能会推荐H263吗？）
此外，您对处理程序的来源有一些代码奇怪：
try {
handler.setSource(ods); // <-- You set the source once here
} catch (IncompatibleSourceException e) {
System.err.println("Cannot handle the output DataSource from the processor: " + ods);
//return false;
}
System.err.println("Start datasource handler ");
handler.addDataSinkListener(this);
try{
handler.setSource(ds); // <-- Then change it again quickly here to the raw output from the capture device!
handler.start();
}
catch(IncompatibleSourceException ioe){
ioe.printStackTrace();
}
最后，关于关闭处理器/播放器的一个非显而易见的说明。 关闭的顺序是： 停（） DEALLOCATE（） 关闭（）
州进行如下：
State: Controller.Running
stop()
State: Controller.Prefetched
deallocate()
State: Controller.Realized
close()
State: Controller.Unrealized
是的，在继续操作之前，您应该等待处理器/播放器达到所提到的每个状态。如果你忽略这个提示，你会感到很遗憾，因为JMF会泄漏内存，如果你没有正确关闭内存就不会相信，特别是在Windows下。
以下是我自动处理此问题的代码：
public class PlayerUtils {
static public void cleanupPlayer(Player player) {
if (player != null) {
if (player.getState() == Player.Started) {
player.stop();
waitForState(player, Player.Prefetched);
}
if (player.getState() == Player.Prefetched) {
player.deallocate();
waitForState(player, Player.Realized);
}
player.close();
}
}
static public void cleanupPlayer(MediaPlayer player) {
if (player != null) {
cleanupPlayer(player.getPlayer());
}
}
static private void waitForState(Player player, int state) {
// Fast abort
if (player.getState() == state) {
return;
}
long startTime = new Date().getTime();
long timeout = 5 * 1000;
final Object waitListener = new Object();
ControllerListener cl = new ControllerListener() {
@Override
public void controllerUpdate(ControllerEvent ce) {
synchronized (waitListener) {
waitListener.notifyAll();
}
}
};
try {
player.addControllerListener(cl);
// Make sure we wake up every 500ms to check for timeouts and in case we miss a signal
synchronized (waitListener) {
while (player.getState() != state && new Date().getTime() - startTime < timeout) {
try {
waitListener.wait(500);
}
catch (InterruptedException ex) {
Logger.getLogger(PlayerUtils.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
if (new Date().getTime() - startTime > timeout) {
Logger.getLogger(PlayerUtils.class.getName()).log(Level.SEVERE, "Timed out waiting for state change from {0} to {1}", new Object[]{player.getState(), state});
}
}
finally {
// No matter what else happens, we want to remove this
player.removeControllerListener(cl);
}
}
}