To com um problema… Peguei um código da Sun, FrameAccess.java, para extrair os frames de um vídeo. Mas dá esse erro. Um help por favor? O erro segue abaixo, e logo depois o código completo do FrameAccess.
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Failed to create a processor from the given url: javax.media.NoProcessorException: Cannot find a Processor for: C:\Video.mpeg
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/*
- @(#)FrameAccess.java 1.5 01/03/13
- Copyright (c) 1999-2001 Sun Microsystems, Inc. All Rights Reserved.
- Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
- modify and redistribute this software in source and binary code form,
- provided that i) this copyright notice and license appear on all copies of
- the software; and ii) Licensee does not utilize the software in a manner
- which is disparaging to Sun.
- This software is provided "AS IS," without a warranty of any kind. ALL
- EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
- IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
- NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
- LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
- OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
- LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
- INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
- CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
- OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGES.
- This software is not designed or intended for use in on-line control of
- aircraft, air traffic, aircraft navigation or aircraft communications; or in
- the design, construction, operation or maintenance of any nuclear
- facility. Licensee represents and warrants that it will not use or
- redistribute the Software for such purposes.
*/
import java.awt.;
import javax.media.;
import javax.media.control.TrackControl;
import javax.media.Format;
import javax.media.format.*;
/**
-
Sample program to access individual video frames by using a
-
"pass-thru" codec. The codec is inserted into the data flow
-
path. As data pass through this codec, a callback is invoked
-
for each frame of video data.
*/
public class FrameAccess extends Frame implements ControllerListener {Processor p;
Object waitSync = new Object();
boolean stateTransitionOK = true;/**
- Given a media locator, create a processor and use that processor
- as a player to playback the media.
- During the processor’s Configured state, two “pass-thru” codecs,
- PreAccessCodec and PostAccessCodec, are set on the video track.
- These codecs are used to get access to individual video frames
- of the media.
- Much of the code is just standard code to present media in JMF.
*/
public boolean open(MediaLocator ml) {
try {
p = Manager.createProcessor(ml);
} catch (Exception e) {
System.err.println("Failed to create a processor from the given url: " + e);
return false;
}p.addControllerListener(this);
// Put the Processor into configured state.
p.configure();
if (!waitForState(p.Configured)) {
System.err.println("Failed to configure the processor.");
return false;
}// So I can use it as a player.
p.setContentDescriptor(null);// Obtain the track controls.
TrackControl tc[] = p.getTrackControls();if (tc == null) {
System.err.println("Failed to obtain track controls from the processor.");
return false;
}// Search for the track control for the video track.
TrackControl videoTrack = null;for (int i = 0; i < tc.length; i++) {
if (tc[i].getFormat() instanceof VideoFormat) {
videoTrack = tc[i];
break;
}
}if (videoTrack == null) {
System.err.println("The input media does not contain a video track.");
return false;
}System.err.println("Video format: " + videoTrack.getFormat());
// Instantiate and set the frame access codec to the data flow path.
try {
Codec codec[] = { new PreAccessCodec(),
new PostAccessCodec()};
videoTrack.setCodecChain(codec);
} catch (UnsupportedPlugInException e) {
System.err.println("The process does not support effects.");
}// Realize the processor.
p.prefetch();
if (!waitForState(p.Prefetched)) {
System.err.println("Failed to realize the processor.");
return false;
}// Display the visual & control component if there’s one.
setLayout(new BorderLayout());
Component cc;
Component vc;
if ((vc = p.getVisualComponent()) != null) {
add("Center", vc);
}if ((cc = p.getControlPanelComponent()) != null) {
add("South", cc);
}// Start the processor.
p.start();setVisible(true);
return true;
}public void addNotify() {
super.addNotify();
pack();
}/**
- Block until the processor has transitioned to the given state.
- Return false if the transition failed.
*/
boolean waitForState(int state) {
synchronized (waitSync) {
try {
while (p.getState() != state && stateTransitionOK)
waitSync.wait();
} catch (Exception e) {}
}
return stateTransitionOK;
}
/**
- Controller Listener.
*/
public void controllerUpdate(ControllerEvent evt) {
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) {
p.close();
System.exit(0);
}
}/**
- Main program
*/
public static void main(String [] args) {
/*
if (args.length == 0) {
prUsage();
System.exit(0);
}String url = args[0];
*/String url = "C:\Video.mpeg";
if (url.indexOf(":") < 0) {
prUsage();
System.exit(0);
}MediaLocator ml;
if ((ml = new MediaLocator(url)) == null) {
System.err.println("Cannot build media locator from: " + url);
System.exit(0);
}FrameAccess fa = new FrameAccess();
if (!fa.open(ml))
System.exit(0);
}static void prUsage() {
System.err.println("Usage: java FrameAccess <url>");
}/*********************************************************
- Inner class.
- A pass-through codec to access to individual frames.
*********************************************************/
public class PreAccessCodec implements Codec {
/**
* Callback to access individual video frames.
*/
void accessFrame(Buffer frame) {// For demo, we'll just print out the frame #, time & // data length. long t = (long)(frame.getTimeStamp()/10000000f); System.err.println("Pre: frame #: " + frame.getSequenceNumber() + ", time: " + ((float)t)/100f + ", len: " + frame.getLength());}
/**
- The code for a pass through codec.
*/
// We’ll advertize as supporting all video formats.
protected Format supportedIns[] = new Format [] {
new VideoFormat(null)
};// We’ll advertize as supporting all video formats.
protected Format supportedOuts[] = new Format [] {
new VideoFormat(null)
};Format input = null, output = null;
public String getName() {
return "Pre-Access Codec";
}// No op.
public void open() {
}// No op.
public void close() {
}// No op.
public void reset() {
}public Format [] getSupportedInputFormats() {
return supportedIns;
}public Format [] getSupportedOutputFormats(Format in) {
if (in == null)
return supportedOuts;
else {
// If an input format is given, we use that input format
// as the output since we are not modifying the bit stream
// at all.
Format outs[] = new Format[1];
outs[0] = in;
return outs;
}
}public Format setInputFormat(Format format) {
input = format;
return input;
}public Format setOutputFormat(Format format) {
output = format;
return output;
}public int process(Buffer in, Buffer out) {
// This is the "Callback" to access individual frames. accessFrame(in); // Swap the data between the input & output. Object data = in.getData(); in.setData(out.getData()); out.setData(data); // Copy the input attributes to the output out.setFormat(in.getFormat()); out.setLength(in.getLength()); out.setOffset(in.getOffset()); return BUFFER_PROCESSED_OK;}
public Object[] getControls() {
return new Object[0];
}public Object getControl(String type) {
return null;
}
}public class PostAccessCodec extends PreAccessCodec {
// We’ll advertize as supporting all video formats.
public PostAccessCodec() {
supportedIns = new Format [] {
new RGBFormat()
};
}/**
* Callback to access individual video frames.
*/
void accessFrame(Buffer frame) {// For demo, we'll just print out the frame #, time & // data length. long t = (long)(frame.getTimeStamp()/10000000f); System.err.println("Post: frame #: " + frame.getSequenceNumber() + ", time: " + ((float)t)/100f + ", len: " + frame.getLength());}
public String getName() {
return "Post-Access Codec";
}
}
}
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