Utilisation JMF capture video javax.media.CannotRealizeException: Unable to provide all requested tracks
Bonjour à tous,
j'ai récupéré un bout de code du net qui utilise JMF pour récupérer le flux video d'une camera, je rencontre un probleme d'exécution de ce programme sur mon PC qui a JMF2.1.1 installé dessus et qui fonctionne bien avec JMSTudio (capture Webcam ok).
voici le code:
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| package cam;
import java.io.*;
import javax.media.*;
import javax.media.control.*;
import javax.media.datasink.*;
import javax.media.format.*;
import javax.media.protocol.*;
public class Camera {
private static boolean debugDeviceList = false;
private static String defaultVideoDeviceName = "v4l:Logitech QuickCam Messenger :0";
private static String defaultAudioDeviceName = "JavaSound audio capture";
private static String defaultVideoFormatString = "size=320x240, encoding=rgb, maxdatalength=230400";
private static String defaultAudioFormatString = "linear, 44100.0 hz, 16-bit, stereo, littleendian, signed";
private static CaptureDeviceInfo captureVideoDevice = null;
private static CaptureDeviceInfo captureAudioDevice = null;
private static VideoFormat captureVideoFormat = null;
private static AudioFormat captureAudioFormat = null;
public static void main(String args[])
{
// get command line arguments
for (int x = 0; x < args.length; x++)
{
// -dd = debug devices list -> display list of all media devices - and exit
if (args[x].toLowerCase().compareTo("-dd") == 0)
debugDeviceList = true;
Stdout.log("Debug Mode");
}
// get a list of all media devices, search default devices and formats, and print it out if args[x] = "-dd"
// --------------------------------------------------------------------------------------------------------
Stdout.log("Affichage des Medias Disponibles sur le PC...");
java.util.Vector deviceListVector = CaptureDeviceManager.getDeviceList(null);
if (deviceListVector == null)
{
Stdout.log("... error: media device list vector is null, program aborted");
System.exit(0);
}
if (deviceListVector.size() == 0)
{
Stdout.log("... error: media device list vector size is 0, program aborted");
System.exit(0);
}
for (int x = 0; x < deviceListVector.size(); x++)
{
// display device name
CaptureDeviceInfo deviceInfo = (CaptureDeviceInfo) deviceListVector.elementAt(x);
String deviceInfoText = deviceInfo.getName();
if (debugDeviceList)
Stdout.log("device " + x + ": " + deviceInfoText);
// display device formats
Format deviceFormat[] = deviceInfo.getFormats();
for (int y = 0; y < deviceFormat.length; y++){
// serach for default video device
if (captureVideoDevice == null)
if (deviceFormat[y] instanceof VideoFormat)
if (deviceInfo.getName().indexOf(defaultVideoDeviceName) >= 0){
captureVideoDevice = deviceInfo;
Stdout.log(">>> capture video device = " + deviceInfo.getName());
}
// search for default video format
if (captureVideoDevice == deviceInfo)
if (captureVideoFormat == null)
if (DeviceInfo.formatToString(deviceFormat[y]).indexOf(defaultVideoFormatString) >= 0){
captureVideoFormat = (VideoFormat) deviceFormat[y];
Stdout.log(">>> capture video format = " + DeviceInfo.formatToString(deviceFormat[y]));
}
// serach for default audio device
if (captureAudioDevice == null)
if (deviceFormat[y] instanceof AudioFormat)
if (deviceInfo.getName().indexOf(defaultAudioDeviceName) >= 0){
captureAudioDevice = deviceInfo;
Stdout.log(">>> capture audio device = " + deviceInfo.getName());
}
// search for default audio format
if (captureAudioDevice == deviceInfo)
if (captureAudioFormat == null)
if (DeviceInfo.formatToString(deviceFormat[y]).indexOf(defaultAudioFormatString) >= 0){
captureAudioFormat = (AudioFormat) deviceFormat[y];
Stdout.log(">>> capture audio format = " + DeviceInfo.formatToString(deviceFormat[y]));
}
if (debugDeviceList)
Stdout.log(" - format: " + DeviceInfo.formatToString(deviceFormat[y]));
}
}
Stdout.log("... list completed.");
// if args[x] = "-dd" terminate now
// --------------------------------
if (debugDeviceList)
System.exit(0);
// setup video data source
// -----------------------
Stdout.log("Create Data Source Video");
MediaLocator videoMediaLocator = captureVideoDevice.getLocator();
DataSource videoDataSource = null;
try
{
videoDataSource = javax.media.Manager.createDataSource(videoMediaLocator);
}
catch (IOException ie) {
Stdout.log("Erreur d'IO pour Video");
ie.printStackTrace();
System.exit(0);
}
catch (NoDataSourceException nse) {
Stdout.log("Erreur de DataSource non Dispo Video");
nse.printStackTrace();
System.exit(0);
}
if (! DeviceInfo.setFormat(videoDataSource, captureVideoFormat))
{
Stdout.log("Error: unable to set video format - program aborted");
System.exit(0);
}
Stdout.log("Create Data source audio");
// setup audio data source
// -----------------------
MediaLocator audioMediaLocator = captureAudioDevice.getLocator();
DataSource audioDataSource = null;
try
{
audioDataSource = javax.media.Manager.createDataSource(audioMediaLocator);
}
catch (IOException ie) {
Stdout.log("Erreur d'IO pour Audio");
//Stdout.logAndAbortException(ie);
ie.toString();
System.exit(0);
}
catch (NoDataSourceException nse) {
Stdout.log("Erreur de DataSource non Dispo pour Audio");
nse.toString();
System.exit(0);
//Stdout.logAndAbortException(nse);
}
if (! DeviceInfo.setFormat(audioDataSource, captureAudioFormat))
{
Stdout.log("Error: unable to set audio format - program aborted");
System.exit(0);
}
Stdout.log("Merge Data source");
// merge the two data sources
// --------------------------
DataSource mixedDataSource = null;
try
{
DataSource dArray[] = new DataSource[2];
dArray[0] = videoDataSource;
dArray[1] = audioDataSource;
mixedDataSource = javax.media.Manager.createMergingDataSource(dArray);
}
catch (IncompatibleSourceException ise) { Stdout.logAndAbortException(ise); }
// create a new processor
// ----------------------
// setup output file format ->> msvideo
FileTypeDescriptor outputType = new FileTypeDescriptor(FileTypeDescriptor.MSVIDEO);
// setup output video and audio data format
Format outputFormat[] = new Format[2];
outputFormat[0] = new VideoFormat(VideoFormat.INDEO50);
outputFormat[1] = new AudioFormat(AudioFormat.GSM_MS /* LINEAR */);
// create processor
Stdout.log("Create Realized Processor");
//on tente de faire juste videoDataSource
ProcessorModel processorModel = new ProcessorModel(videoDataSource, outputFormat, outputType);
//ProcessorModel processorModel = new ProcessorModel(mixedDataSource, outputFormat, outputType);
Processor processor = null;
try
{
processor = Manager.createRealizedProcessor(processorModel);
}
catch (IOException e) { Stdout.logAndAbortException(e); }
catch (NoProcessorException e) { Stdout.logAndAbortException(e); }
catch (CannotRealizeException e) {
e.printStackTrace();
Stdout.logAndAbortException(e);
}
Stdout.log("Creation fichier AVI");
// get the output of the processor
DataSource source = processor.getDataOutput();
// create a File protocol MediaLocator with the location
// of the file to which bits are to be written
MediaLocator dest = new MediaLocator("file:testcam.avi");
// create a datasink to do the file
DataSink dataSink = null;
MyDataSinkListener dataSinkListener = null;
try
{
dataSink = Manager.createDataSink(source, dest);
dataSinkListener = new MyDataSinkListener();
dataSink.addDataSinkListener(dataSinkListener);
dataSink.open();
}
catch (IOException e) { Stdout.logAndAbortException(e); }
catch (NoDataSinkException e) { Stdout.logAndAbortException(e); }
catch (SecurityException e) { Stdout.logAndAbortException(e); }
// now start the datasink and processor
try
{
dataSink.start();
}
catch (IOException e) { Stdout.logAndAbortException(e); }
processor.start();
Stdout.log("starting capturing ...");
try { Thread.currentThread().sleep(10000); } catch (InterruptedException ie) {} // capture for 10 seconds
Stdout.log("... capturing done");
// stop and close the processor when done capturing...
// close the datasink when EndOfStream event is received...
processor.stop();
processor.close();
dataSinkListener.waitEndOfStream(10);
dataSink.close();
Stdout.log("[all done]");
}
} |
et voici le résultat obtenu et la ligne de commande de lancement de l'appli:
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|
JMFHOME=/EMI/JMF-2.1.1e/
export JMFHOME
JAVA_HOME=/EMI/jdk1.6
export JAVA_HOME
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$JMFHOME/lib:$JAVA_HOME/jre/lib/i386:$JAVA_HOME/jre/lib/i386/client
export LD_LIBRARY_PATH
java -Djava.awt.headless=false -classpath .:./cam:/EMI/JMF-2.1.1e/lib/jmf.jar cam.Camera |
Code:
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| Affichage des Medias Disponibles sur le PC...
>>> capture audio device = JavaSound audio capture
>>> capture audio format = linear, 44100.0 hz, 16-bit, stereo, littleendian, signed
>>> capture video device = v4l:Logitech QuickCam Messenger :0
>>> capture video format = size=320x240, encoding=rgb, maxdatalength=230400
... list completed.
Create Data Source Video
Create Data source audio
Merge Data source
Create Realized Processor
javax.media.CannotRealizeException: Unable to provide all requested tracks
at javax.media.Manager.createRealizedProcessor(Manager.java:908)
at cam.Camera.main(Camera.java:196)
javax.media.CannotRealizeException: Unable to provide all requested tracks |
qu'en pensez vous ?
MErci,
Tiamat.
