MP3 無法通過 JMF 流式傳輸

Question

基本思想是訪問 .mp3 文件並通過 RTP 流將其發送到其他想要播放該歌曲的客戶端。

這是 RTPServer.java，我在網上找到並根據我的喜好對其進行了修改。

 package server; import java.net.InetAddress; import javax.media.rtp.*; import javax.media.rtp.rtcp.*; import javax.media.*; import javax.media.protocol.*; import javax.media.control.*; public class RTPServer implements ControllerListener, Runnable { private boolean realized = false; private boolean configured = false; private String ipAddress; Processor p; MediaLocator src; public static void main (String[] args) { RTPServer rtp = new RTPServer("192.168.1.101", "04 - Blue.mp3"); Thread t = new Thread(rtp); t.start(); } public RTPServer(String ip, String song) { ipAddress = ip; String srcFile = "Muzika\\\\" + song; src = new MediaLocator("file:" + srcFile); } private void setTrackFormat(Processor p) { // 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"); System.exit(1); } // Set the output content descriptor to RAW_RTP // This will limit the supported formats reported from // Track.getSupportedFormats to only valid RTP formats. ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP); p.setContentDescriptor(cd); Format supported[]; Format chosen; boolean atLeastOneTrack = false; // Program the tracks. for (int i = 0; i < tracks.length; i++) { Format format = tracks[i].getFormat(); System.out.println("Trenutni format je " +format.getEncoding()); if (tracks[i].isEnabled()) { supported = tracks[i].getSupportedFormats(); for (int n = 0; n < supported.length; n++) System.out.println("Supported format: " + supported[n]); // We've set the output content to the RAW_RTP. // So all the supported formats should work with RTP. // We'll just pick the first one. if (supported.length > 0) { chosen = supported[0]; // this is where I tried changing formats tracks[i].setFormat(chosen); System.err.println("Track " + i + " is set to transmit as: " +chosen); atLeastOneTrack = true; } else tracks[i].setEnabled(false); } else tracks[i].setEnabled(false); } } private void transmit(Processor p) { try { DataSource output = p.getDataOutput(); PushBufferDataSource pbds = (PushBufferDataSource) output; RTPManager rtpMgr = RTPManager.newInstance(); SessionAddress localAddr, destAddr; SendStream sendStream; int port = 42050; SourceDescription srcDesList[]; localAddr = new SessionAddress( InetAddress.getLocalHost(), port); InetAddress ipAddr = InetAddress.getByName(ipAddress); destAddr = new SessionAddress( ipAddr, port); rtpMgr.initialize(localAddr); rtpMgr.addTarget(destAddr); sendStream = rtpMgr.createSendStream(output, 0); sendStream.start(); System.err.println( "Created RTP session: " + ipAddress + " " + port); p.start(); } catch(Exception e) { e.printStackTrace(); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof RealizeCompleteEvent) { realized = true; } else if (evt instanceof ConfigureCompleteEvent) { configured = true; } else if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { // System.out.println(evt.toString()); } } public void run() { try { p = Manager.createProcessor(src); p.addControllerListener(this); p.configure(); while (! configured) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } setTrackFormat(p); p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP)); p.realize(); while (! realized) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } transmit(p); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } } And here is receiving end, RTPClient: package client; import javax.media.*; public class RTPClient implements ControllerListener, Runnable { Player p; MediaLocator src; public static void main(String[] args) { RTPClient rtp = new RTPClient("192.168.1.100"); Thread t = new Thread(rtp); t.start(); } public RTPClient(String ip) { String srcUrl = "rtp://" + ip + ":42050/audio/1"; DataSink sink; src = new MediaLocator(srcUrl); } public void run() { try { p = Manager.createPlayer(src); p.addControllerListener(this); p.start(); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { System.out.println(evt.toString()); } } } I figured, it successfully sends the whatever file I choose, but when I send .mp3, Client won't play it. I get: RTP Handler internal error: javax.media.ControllerErrorEvent[source=com.sun.media.content.unknown.Handler@9ed927,message=Internal module com.sun.media.BasicRendererModule@1386000: failed to handle a data format change!] Interesting thing is, .wav is sent perfectly. So my guess was is the format set prior to sending. And I tried changing format to some other supported format, but then I get bunch of other errors.

package server; import java.net.InetAddress; import javax.media.rtp.*; import javax.media.rtp.rtcp.*; import javax.media.*; import javax.media.protocol.*; import javax.media.control.*; public class RTPServer implements ControllerListener, Runnable { private boolean realized = false; private boolean configured = false; private String ipAddress; Processor p; MediaLocator src; public static void main (String[] args) { RTPServer rtp = new RTPServer("192.168.1.101", "04 - Blue.mp3"); Thread t = new Thread(rtp); t.start(); } public RTPServer(String ip, String song) { ipAddress = ip; String srcFile = "Muzika\\\\" + song; src = new MediaLocator("file:" + srcFile); } private void setTrackFormat(Processor p) { // 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"); System.exit(1); } // Set the output content descriptor to RAW_RTP // This will limit the supported formats reported from // Track.getSupportedFormats to only valid RTP formats. ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP); p.setContentDescriptor(cd); Format supported[]; Format chosen; boolean atLeastOneTrack = false; // Program the tracks. for (int i = 0; i < tracks.length; i++) { Format format = tracks[i].getFormat(); System.out.println("Trenutni format je " +format.getEncoding()); if (tracks[i].isEnabled()) { supported = tracks[i].getSupportedFormats(); for (int n = 0; n < supported.length; n++) System.out.println("Supported format: " + supported[n]); // We've set the output content to the RAW_RTP. // So all the supported formats should work with RTP. // We'll just pick the first one. if (supported.length > 0) { chosen = supported[0]; // this is where I tried changing formats tracks[i].setFormat(chosen); System.err.println("Track " + i + " is set to transmit as: " +chosen); atLeastOneTrack = true; } else tracks[i].setEnabled(false); } else tracks[i].setEnabled(false); } } private void transmit(Processor p) { try { DataSource output = p.getDataOutput(); PushBufferDataSource pbds = (PushBufferDataSource) output; RTPManager rtpMgr = RTPManager.newInstance(); SessionAddress localAddr, destAddr; SendStream sendStream; int port = 42050; SourceDescription srcDesList[]; localAddr = new SessionAddress( InetAddress.getLocalHost(), port); InetAddress ipAddr = InetAddress.getByName(ipAddress); destAddr = new SessionAddress( ipAddr, port); rtpMgr.initialize(localAddr); rtpMgr.addTarget(destAddr); sendStream = rtpMgr.createSendStream(output, 0); sendStream.start(); System.err.println( "Created RTP session: " + ipAddress + " " + port); p.start(); } catch(Exception e) { e.printStackTrace(); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof RealizeCompleteEvent) { realized = true; } else if (evt instanceof ConfigureCompleteEvent) { configured = true; } else if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { // System.out.println(evt.toString()); } } public void run() { try { p = Manager.createProcessor(src); p.addControllerListener(this); p.configure(); while (! configured) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } setTrackFormat(p); p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP)); p.realize(); while (! realized) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } transmit(p); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } } And here is receiving end, RTPClient: package client; import javax.media.*; public class RTPClient implements ControllerListener, Runnable { Player p; MediaLocator src; public static void main(String[] args) { RTPClient rtp = new RTPClient("192.168.1.100"); Thread t = new Thread(rtp); t.start(); } public RTPClient(String ip) { String srcUrl = "rtp://" + ip + ":42050/audio/1"; DataSink sink; src = new MediaLocator(srcUrl); } public void run() { try { p = Manager.createPlayer(src); p.addControllerListener(this); p.start(); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { System.out.println(evt.toString()); } } } I figured, it successfully sends the whatever file I choose, but when I send .mp3, Client won't play it. I get: RTP Handler internal error: javax.media.ControllerErrorEvent[source=com.sun.media.content.unknown.Handler@9ed927,message=Internal module com.sun.media.BasicRendererModule@1386000: failed to handle a data format change!] Interesting thing is, .wav is sent perfectly. So my guess was is the format set prior to sending. And I tried changing format to some other supported format, but then I get bunch of other errors.

 package server; import java.net.InetAddress; import javax.media.rtp.*; import javax.media.rtp.rtcp.*; import javax.media.*; import javax.media.protocol.*; import javax.media.control.*; public class RTPServer implements ControllerListener, Runnable { private boolean realized = false; private boolean configured = false; private String ipAddress; Processor p; MediaLocator src; public static void main (String[] args) { RTPServer rtp = new RTPServer("192.168.1.101", "04 - Blue.mp3"); Thread t = new Thread(rtp); t.start(); } public RTPServer(String ip, String song) { ipAddress = ip; String srcFile = "Muzika\\\\" + song; src = new MediaLocator("file:" + srcFile); } private void setTrackFormat(Processor p) { // 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"); System.exit(1); } // Set the output content descriptor to RAW_RTP // This will limit the supported formats reported from // Track.getSupportedFormats to only valid RTP formats. ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP); p.setContentDescriptor(cd); Format supported[]; Format chosen; boolean atLeastOneTrack = false; // Program the tracks. for (int i = 0; i < tracks.length; i++) { Format format = tracks[i].getFormat(); System.out.println("Trenutni format je " +format.getEncoding()); if (tracks[i].isEnabled()) { supported = tracks[i].getSupportedFormats(); for (int n = 0; n < supported.length; n++) System.out.println("Supported format: " + supported[n]); // We've set the output content to the RAW_RTP. // So all the supported formats should work with RTP. // We'll just pick the first one. if (supported.length > 0) { chosen = supported[0]; // this is where I tried changing formats tracks[i].setFormat(chosen); System.err.println("Track " + i + " is set to transmit as: " +chosen); atLeastOneTrack = true; } else tracks[i].setEnabled(false); } else tracks[i].setEnabled(false); } } private void transmit(Processor p) { try { DataSource output = p.getDataOutput(); PushBufferDataSource pbds = (PushBufferDataSource) output; RTPManager rtpMgr = RTPManager.newInstance(); SessionAddress localAddr, destAddr; SendStream sendStream; int port = 42050; SourceDescription srcDesList[]; localAddr = new SessionAddress( InetAddress.getLocalHost(), port); InetAddress ipAddr = InetAddress.getByName(ipAddress); destAddr = new SessionAddress( ipAddr, port); rtpMgr.initialize(localAddr); rtpMgr.addTarget(destAddr); sendStream = rtpMgr.createSendStream(output, 0); sendStream.start(); System.err.println( "Created RTP session: " + ipAddress + " " + port); p.start(); } catch(Exception e) { e.printStackTrace(); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof RealizeCompleteEvent) { realized = true; } else if (evt instanceof ConfigureCompleteEvent) { configured = true; } else if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { // System.out.println(evt.toString()); } } public void run() { try { p = Manager.createProcessor(src); p.addControllerListener(this); p.configure(); while (! configured) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } setTrackFormat(p); p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP)); p.realize(); while (! realized) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } transmit(p); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } } And here is receiving end, RTPClient: package client; import javax.media.*; public class RTPClient implements ControllerListener, Runnable { Player p; MediaLocator src; public static void main(String[] args) { RTPClient rtp = new RTPClient("192.168.1.100"); Thread t = new Thread(rtp); t.start(); } public RTPClient(String ip) { String srcUrl = "rtp://" + ip + ":42050/audio/1"; DataSink sink; src = new MediaLocator(srcUrl); } public void run() { try { p = Manager.createPlayer(src); p.addControllerListener(this); p.start(); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { System.out.println(evt.toString()); } } } I figured, it successfully sends the whatever file I choose, but when I send .mp3, Client won't play it. I get: RTP Handler internal error: javax.media.ControllerErrorEvent[source=com.sun.media.content.unknown.Handler@9ed927,message=Internal module com.sun.media.BasicRendererModule@1386000: failed to handle a data format change!] Interesting thing is, .wav is sent perfectly. So my guess was is the format set prior to sending. And I tried changing format to some other supported format, but then I get bunch of other errors.

package server; import java.net.InetAddress; import javax.media.rtp.*; import javax.media.rtp.rtcp.*; import javax.media.*; import javax.media.protocol.*; import javax.media.control.*; public class RTPServer implements ControllerListener, Runnable { private boolean realized = false; private boolean configured = false; private String ipAddress; Processor p; MediaLocator src; public static void main (String[] args) { RTPServer rtp = new RTPServer("192.168.1.101", "04 - Blue.mp3"); Thread t = new Thread(rtp); t.start(); } public RTPServer(String ip, String song) { ipAddress = ip; String srcFile = "Muzika\\\\" + song; src = new MediaLocator("file:" + srcFile); } private void setTrackFormat(Processor p) { // 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"); System.exit(1); } // Set the output content descriptor to RAW_RTP // This will limit the supported formats reported from // Track.getSupportedFormats to only valid RTP formats. ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP); p.setContentDescriptor(cd); Format supported[]; Format chosen; boolean atLeastOneTrack = false; // Program the tracks. for (int i = 0; i < tracks.length; i++) { Format format = tracks[i].getFormat(); System.out.println("Trenutni format je " +format.getEncoding()); if (tracks[i].isEnabled()) { supported = tracks[i].getSupportedFormats(); for (int n = 0; n < supported.length; n++) System.out.println("Supported format: " + supported[n]); // We've set the output content to the RAW_RTP. // So all the supported formats should work with RTP. // We'll just pick the first one. if (supported.length > 0) { chosen = supported[0]; // this is where I tried changing formats tracks[i].setFormat(chosen); System.err.println("Track " + i + " is set to transmit as: " +chosen); atLeastOneTrack = true; } else tracks[i].setEnabled(false); } else tracks[i].setEnabled(false); } } private void transmit(Processor p) { try { DataSource output = p.getDataOutput(); PushBufferDataSource pbds = (PushBufferDataSource) output; RTPManager rtpMgr = RTPManager.newInstance(); SessionAddress localAddr, destAddr; SendStream sendStream; int port = 42050; SourceDescription srcDesList[]; localAddr = new SessionAddress( InetAddress.getLocalHost(), port); InetAddress ipAddr = InetAddress.getByName(ipAddress); destAddr = new SessionAddress( ipAddr, port); rtpMgr.initialize(localAddr); rtpMgr.addTarget(destAddr); sendStream = rtpMgr.createSendStream(output, 0); sendStream.start(); System.err.println( "Created RTP session: " + ipAddress + " " + port); p.start(); } catch(Exception e) { e.printStackTrace(); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof RealizeCompleteEvent) { realized = true; } else if (evt instanceof ConfigureCompleteEvent) { configured = true; } else if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { // System.out.println(evt.toString()); } } public void run() { try { p = Manager.createProcessor(src); p.addControllerListener(this); p.configure(); while (! configured) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } setTrackFormat(p); p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP)); p.realize(); while (! realized) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } transmit(p); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } } And here is receiving end, RTPClient: package client; import javax.media.*; public class RTPClient implements ControllerListener, Runnable { Player p; MediaLocator src; public static void main(String[] args) { RTPClient rtp = new RTPClient("192.168.1.100"); Thread t = new Thread(rtp); t.start(); } public RTPClient(String ip) { String srcUrl = "rtp://" + ip + ":42050/audio/1"; DataSink sink; src = new MediaLocator(srcUrl); } public void run() { try { p = Manager.createPlayer(src); p.addControllerListener(this); p.start(); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { System.out.println(evt.toString()); } } } I figured, it successfully sends the whatever file I choose, but when I send .mp3, Client won't play it. I get: RTP Handler internal error: javax.media.ControllerErrorEvent[source=com.sun.media.content.unknown.Handler@9ed927,message=Internal module com.sun.media.BasicRendererModule@1386000: failed to handle a data format change!] Interesting thing is, .wav is sent perfectly. So my guess was is the format set prior to sending. And I tried changing format to some other supported format, but then I get bunch of other errors.

 package server; import java.net.InetAddress; import javax.media.rtp.*; import javax.media.rtp.rtcp.*; import javax.media.*; import javax.media.protocol.*; import javax.media.control.*; public class RTPServer implements ControllerListener, Runnable { private boolean realized = false; private boolean configured = false; private String ipAddress; Processor p; MediaLocator src; public static void main (String[] args) { RTPServer rtp = new RTPServer("192.168.1.101", "04 - Blue.mp3"); Thread t = new Thread(rtp); t.start(); } public RTPServer(String ip, String song) { ipAddress = ip; String srcFile = "Muzika\\\\" + song; src = new MediaLocator("file:" + srcFile); } private void setTrackFormat(Processor p) { // 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"); System.exit(1); } // Set the output content descriptor to RAW_RTP // This will limit the supported formats reported from // Track.getSupportedFormats to only valid RTP formats. ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP); p.setContentDescriptor(cd); Format supported[]; Format chosen; boolean atLeastOneTrack = false; // Program the tracks. for (int i = 0; i < tracks.length; i++) { Format format = tracks[i].getFormat(); System.out.println("Trenutni format je " +format.getEncoding()); if (tracks[i].isEnabled()) { supported = tracks[i].getSupportedFormats(); for (int n = 0; n < supported.length; n++) System.out.println("Supported format: " + supported[n]); // We've set the output content to the RAW_RTP. // So all the supported formats should work with RTP. // We'll just pick the first one. if (supported.length > 0) { chosen = supported[0]; // this is where I tried changing formats tracks[i].setFormat(chosen); System.err.println("Track " + i + " is set to transmit as: " +chosen); atLeastOneTrack = true; } else tracks[i].setEnabled(false); } else tracks[i].setEnabled(false); } } private void transmit(Processor p) { try { DataSource output = p.getDataOutput(); PushBufferDataSource pbds = (PushBufferDataSource) output; RTPManager rtpMgr = RTPManager.newInstance(); SessionAddress localAddr, destAddr; SendStream sendStream; int port = 42050; SourceDescription srcDesList[]; localAddr = new SessionAddress( InetAddress.getLocalHost(), port); InetAddress ipAddr = InetAddress.getByName(ipAddress); destAddr = new SessionAddress( ipAddr, port); rtpMgr.initialize(localAddr); rtpMgr.addTarget(destAddr); sendStream = rtpMgr.createSendStream(output, 0); sendStream.start(); System.err.println( "Created RTP session: " + ipAddress + " " + port); p.start(); } catch(Exception e) { e.printStackTrace(); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof RealizeCompleteEvent) { realized = true; } else if (evt instanceof ConfigureCompleteEvent) { configured = true; } else if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { // System.out.println(evt.toString()); } } public void run() { try { p = Manager.createProcessor(src); p.addControllerListener(this); p.configure(); while (! configured) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } setTrackFormat(p); p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP)); p.realize(); while (! realized) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } transmit(p); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } } And here is receiving end, RTPClient: package client; import javax.media.*; public class RTPClient implements ControllerListener, Runnable { Player p; MediaLocator src; public static void main(String[] args) { RTPClient rtp = new RTPClient("192.168.1.100"); Thread t = new Thread(rtp); t.start(); } public RTPClient(String ip) { String srcUrl = "rtp://" + ip + ":42050/audio/1"; DataSink sink; src = new MediaLocator(srcUrl); } public void run() { try { p = Manager.createPlayer(src); p.addControllerListener(this); p.start(); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { System.out.println(evt.toString()); } } } I figured, it successfully sends the whatever file I choose, but when I send .mp3, Client won't play it. I get: RTP Handler internal error: javax.media.ControllerErrorEvent[source=com.sun.media.content.unknown.Handler@9ed927,message=Internal module com.sun.media.BasicRendererModule@1386000: failed to handle a data format change!] Interesting thing is, .wav is sent perfectly. So my guess was is the format set prior to sending. And I tried changing format to some other supported format, but then I get bunch of other errors.

package server; import java.net.InetAddress; import javax.media.rtp.*; import javax.media.rtp.rtcp.*; import javax.media.*; import javax.media.protocol.*; import javax.media.control.*; public class RTPServer implements ControllerListener, Runnable { private boolean realized = false; private boolean configured = false; private String ipAddress; Processor p; MediaLocator src; public static void main (String[] args) { RTPServer rtp = new RTPServer("192.168.1.101", "04 - Blue.mp3"); Thread t = new Thread(rtp); t.start(); } public RTPServer(String ip, String song) { ipAddress = ip; String srcFile = "Muzika\\\\" + song; src = new MediaLocator("file:" + srcFile); } private void setTrackFormat(Processor p) { // 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"); System.exit(1); } // Set the output content descriptor to RAW_RTP // This will limit the supported formats reported from // Track.getSupportedFormats to only valid RTP formats. ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP); p.setContentDescriptor(cd); Format supported[]; Format chosen; boolean atLeastOneTrack = false; // Program the tracks. for (int i = 0; i < tracks.length; i++) { Format format = tracks[i].getFormat(); System.out.println("Trenutni format je " +format.getEncoding()); if (tracks[i].isEnabled()) { supported = tracks[i].getSupportedFormats(); for (int n = 0; n < supported.length; n++) System.out.println("Supported format: " + supported[n]); // We've set the output content to the RAW_RTP. // So all the supported formats should work with RTP. // We'll just pick the first one. if (supported.length > 0) { chosen = supported[0]; // this is where I tried changing formats tracks[i].setFormat(chosen); System.err.println("Track " + i + " is set to transmit as: " +chosen); atLeastOneTrack = true; } else tracks[i].setEnabled(false); } else tracks[i].setEnabled(false); } } private void transmit(Processor p) { try { DataSource output = p.getDataOutput(); PushBufferDataSource pbds = (PushBufferDataSource) output; RTPManager rtpMgr = RTPManager.newInstance(); SessionAddress localAddr, destAddr; SendStream sendStream; int port = 42050; SourceDescription srcDesList[]; localAddr = new SessionAddress( InetAddress.getLocalHost(), port); InetAddress ipAddr = InetAddress.getByName(ipAddress); destAddr = new SessionAddress( ipAddr, port); rtpMgr.initialize(localAddr); rtpMgr.addTarget(destAddr); sendStream = rtpMgr.createSendStream(output, 0); sendStream.start(); System.err.println( "Created RTP session: " + ipAddress + " " + port); p.start(); } catch(Exception e) { e.printStackTrace(); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof RealizeCompleteEvent) { realized = true; } else if (evt instanceof ConfigureCompleteEvent) { configured = true; } else if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { // System.out.println(evt.toString()); } } public void run() { try { p = Manager.createProcessor(src); p.addControllerListener(this); p.configure(); while (! configured) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } setTrackFormat(p); p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP)); p.realize(); while (! realized) { try { Thread.currentThread().sleep(100L);; } catch (InterruptedException e) { // ignore } } transmit(p); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } } And here is receiving end, RTPClient: package client; import javax.media.*; public class RTPClient implements ControllerListener, Runnable { Player p; MediaLocator src; public static void main(String[] args) { RTPClient rtp = new RTPClient("192.168.1.100"); Thread t = new Thread(rtp); t.start(); } public RTPClient(String ip) { String srcUrl = "rtp://" + ip + ":42050/audio/1"; DataSink sink; src = new MediaLocator(srcUrl); } public void run() { try { p = Manager.createPlayer(src); p.addControllerListener(this); p.start(); } catch(Exception e) { e.printStackTrace(); System.exit(1); } } public synchronized void controllerUpdate(ControllerEvent evt) { if (evt instanceof EndOfMediaEvent) { System.exit(0); } else { System.out.println(evt.toString()); } } } I figured, it successfully sends the whatever file I choose, but when I send .mp3, Client won't play it. I get: RTP Handler internal error: javax.media.ControllerErrorEvent[source=com.sun.media.content.unknown.Handler@9ed927,message=Internal module com.sun.media.BasicRendererModule@1386000: failed to handle a data format change!] Interesting thing is, .wav is sent perfectly. So my guess was is the format set prior to sending. And I tried changing format to some other supported format, but then I get bunch of other errors.

 Failed to build a graph for the given custom options. Failed to realize: com.sun.media.ProcessEngine@eee36c Cannot build a flow graph with the customized options: Unable to transcode format: mpegaudio, 48000.0 Hz, 16-bit, Stereo, LittleEndian, Signed, 20000.0 frame rate, FrameSize=11264 bits to: ULAW/rtp, 8000.0 Hz, 8-bit, Stereo outputting to: RAW/RTP Error: Unable to realize com.sun.media.ProcessEngine@eee36c

最后，我打開了 JMStudio（用於在 JMF 中發送/接收媒體流的內置應用程序），當我嘗試流式傳輸 .mp3 時，出現與運行我的應用程序時完全相同的錯誤。 JMF 設置得很好，我檢查了 PATH 和 CLASSPATH，我還安裝了 mp3plugin，它也設置得很好。 一切看起來都很好，但就是不行！ 至少 .mp3 不是。 那么，我怎樣才能讓 .mp3 “走到另一端”？

Answer 1

解決了。

我所要做的就是在發送者/接收者的構造函數中添加這些行。

Format input1 = new AudioFormat(AudioFormat.MPEGLAYER3);
Format input2 = new AudioFormat(AudioFormat.MPEG);
Format output = new AudioFormat(AudioFormat.LINEAR);
PlugInManager.addPlugIn(
        "com.sun.media.codec.audio.mp3.JavaDecoder",
        new Format[]{input1, input2},
        new Format[]{output},
        PlugInManager.CODEC);

可能會幫助其他人解決這個問題:) 仍然不知道為什么 JMStudio 不起作用......我不再關心了。

Answer 2

我的環境無法檢測到新添加的插件。 我必須將編解碼器硬編碼到軌道中。 它可以工作，但 mp3 很混亂。 .wav 完全沒問題。

javax.media.Codec codec = (javax.media.Codec) (Class.forName(plugins.get(0)).newInstance());
    com.sun.media.codec.audio.mp3.JavaDecoder decoder = new com.sun.media.codec.audio.mp3.JavaDecoder();
    Codec[] cc = new Codec[2];
    cc[0] = codec;
    cc[1] = decoder;
    try {
        tracks[0].setCodecChain(cc);
    } catch (UnsupportedPlugInException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (NotConfiguredError e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

Answer 3

有幾件事情要做才能使有問題的代碼正常工作：

1. 將mp3plugin.jar放在類路徑中。 它是 JMF 的 mp3 插件。 你可以在網上找到它。

2. 將以下代碼放在 main 方法中以注冊新添加的插件。

    Format input1 = new AudioFormat(AudioFormat.MPEGLAYER3); Format input2 = new AudioFormat(AudioFormat.MPEG); Format output = new AudioFormat(AudioFormat.LINEAR); PlugInManager.addPlugIn( "com.sun.media.codec.audio.mp3.JavaDecoder", new Format[]{input1, input2}, new Format[]{output}, PlugInManager.CODEC);

3. 在 RTPServer.java 中將曲目格式設置為 AduioFormat.DVI_RTP，將您的 mp3 音樂轉換為 RTPClient 可以播放的格式。

之前

if (supported.length > 0) {
      chosen = supported[0]; // this is where I tried changing formats
      tracks[i].setFormat(chosen);
      System.err.println("Track " + i + " is set to transmit as: " +chosen);
      atLeastOneTrack = true;
  } else

之后（用“new AudioFormat(AudioFormat.DVI_RTP)”替換“chosen”）

if (supported.length > 0) {
      chosen = supported[0]; // this is where I tried changing formats
      tracks[i].setFormat(new AudioFormat(AudioFormat.DVI_RTP));
      atLeastOneTrack = true;
  } else

然后一切正常。

這是我的 RTPServer

import java.io.File;
import java.io.IOException;
import java.net.InetAddress;
import java.net.MalformedURLException;    
import javax.media.rtp.*;
import javax.media.rtp.rtcp.*;
import javax.media.*;
import javax.media.protocol.*;
import javax.media.control.*;
import javax.media.format.AudioFormat;

public class RTPServerMP3 implements ControllerListener {
    private String ipAddress;
    Processor p;
    public static void main(String[] args) throws NoProcessorException, IOException {
        Format input1 = new AudioFormat(AudioFormat.MPEGLAYER3);
        Format input2 = new AudioFormat(AudioFormat.MPEG);
        Format output = new AudioFormat(AudioFormat.LINEAR);
        PlugInManager.addPlugIn(
                "com.sun.media.codec.audio.mp3.JavaDecoder",
                new Format[]{input1, input2},
                new Format[]{output},
                PlugInManager.CODEC);
        RTPServerMP3 rtp = new RTPServerMP3("192.168.1.86");
        rtp.p = Manager.createProcessor(new MediaLocator((new File( "roar_of_future.mp3")).toURL()));
        rtp.p.addControllerListener(rtp);
        rtp.p.configure();
    }
    public RTPServerMP3(String ip) throws MalformedURLException {
        ipAddress = ip;
    }
    private void setTrackFormat(Processor p) {
        // 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");
            System.exit(1);
        }
        // Set the output content descriptor to RAW_RTP
        // This will limit the supported formats reported from
        // Track.getSupportedFormats to only valid RTP formats.
        ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP);
        p.setContentDescriptor(cd);
        Format supported[];
        Format chosen;
        boolean atLeastOneTrack = false;
        // Program the tracks.
        for (int i = 0; i < tracks.length; i++) {
            Format format = tracks[i].getFormat();
            System.out.println("seeing format " + format.getEncoding() + " for track " + i);
            if (tracks[i].isEnabled()) {
                supported = tracks[i].getSupportedFormats();
                for (int n = 0; n < supported.length; n++)
                    System.out.println("Supported format: " + supported[n]);
                // We've set the output content to the RAW_RTP.
                // So all the supported formats should work with RTP.
                // We'll just pick the first one.
                if (supported.length > 0) {
                    chosen = supported[0]; // this is where I tried changing formats
                    tracks[i].setFormat(new AudioFormat(AudioFormat.DVI_RTP));
                    System.err.println("Track " + i + " is set to transmit as: " + chosen);
                    atLeastOneTrack = true;
                } else
                    tracks[i].setEnabled(false);
            } else
                tracks[i].setEnabled(false);
        }
    }

    private void transmit(Processor p) {
        try {
            DataSource output = p.getDataOutput();
            PushBufferDataSource pbds = (PushBufferDataSource) output;
            RTPManager rtpMgr = RTPManager.newInstance();
            SessionAddress localAddr, destAddr;
            SendStream sendStream;
            int port = 49150;
            SourceDescription srcDesList[];
            localAddr = new SessionAddress(InetAddress.getLocalHost(), port/2+10);
            InetAddress ipAddr = InetAddress.getByName(ipAddress);
            destAddr = new SessionAddress(ipAddr, port);
            rtpMgr.initialize(localAddr);
            rtpMgr.addTarget(destAddr);
            sendStream = rtpMgr.createSendStream(output, 0);
            sendStream.start();
            System.err.println("Created RTP session: " + ipAddress + " " + port);
            p.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public synchronized void controllerUpdate(ControllerEvent evt) {
        if (evt instanceof RealizeCompleteEvent) {
            transmit(p);
        } else if (evt instanceof ConfigureCompleteEvent) {
            setTrackFormat(p);
            p.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP));
            p.realize();
        } else if (evt instanceof EndOfMediaEvent) {
            System.exit(0);
        } 
    }
}

這是我的 RTPClient

import java.io.IOException;
import javax.media.*;

public class RTPClientMP3  {
    public static void main(String[] args) throws NoPlayerException, CannotRealizeException, IOException {
        String srcUrl = "rtp://192.168.1.86:49150/audio/1";
        MediaLocator src = new MediaLocator(srcUrl);
        Player player = Manager.createRealizedPlayer(src);
        player.start();

    }
}