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以前我使用過JMF，但需要安裝JMF，但我不想增加這種開銷。這就是爲什麼我想轉移到FMJ。 FMJ是開源的。 :)在FMJ中找不到捕獲設備
有一些示例與FMJ源給出的例子。還有一個FMJStudio，我可以在其中運行並傳輸從麥克風捕獲的RTP音頻。
但是，當我想傳輸RTP，使用下面的來源，它找不到任何捕獲設備。 fmj-20070928-0938_2.zip在FMJ 而這個源類的類名是SimpleVoiceTransmiter：
的完整源上可以找到。
//final String urlStr = URLUtils.createUrlStr(new File("samplemedia/gulp2.wav"));//"file://samplemedia/gulp2.wav";
Format format;
format = new AudioFormat(AudioFormat.ULAW_RTP, 8000, 8, 1);
//format = new AudioFormat(AudioFormat.ULAW_RTP, 8000.0, 8, 1, AudioFormat.LITTLE_ENDIAN, AudioFormat.SIGNED);
//format = new AudioFormat(BonusAudioFormatEncodings.ALAW_RTP, 8000, 8, 1);
//format = new AudioFormat(BonusAudioFormatEncodings.SPEEX_RTP, 8000, 8, 1, -1, AudioFormat.SIGNED);
//format = new AudioFormat(BonusAudioFormatEncodings.ILBC_RTP, 8000.0, 16, 1, AudioFormat.LITTLE_ENDIAN, AudioFormat.SIGNED);
CaptureDeviceInfo di = null;
//Set to true if you want to transmit audio from capture device, like microphone.
if (true)
{
// First find a capture device that will capture linear audio
// data at 8bit 8Khz
AudioFormat captureFormat = new AudioFormat(AudioFormat.LINEAR, 8000, 8, 1);
Vector devices = CaptureDeviceManager.getDeviceList(captureFormat);
if (devices.size() > 0)
{
di = (CaptureDeviceInfo) devices.elementAt(0);
} else
{
System.err.println("No capture devices");
// exit if we could not find the relevant capturedevice.
System.exit(-1);
}
}
// Create a processor for this capturedevice & exit if we
// cannot create it
Processor processor = null;
try
{
//processor = Manager.createProcessor(new MediaLocator(urlStr));
processor = Manager.createProcessor(di.getLocator());
} catch (IOException e)
{
e.printStackTrace();
System.exit(-1);
} catch (NoProcessorException e)
{
e.printStackTrace();
System.exit(-1);
}
// configure the processor
processor.configure();
while (processor.getState() != Processor.Configured)
{
try
{
Thread.sleep(10);
} catch (InterruptedException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
processor.setContentDescriptor(new ContentDescriptor(ContentDescriptor.RAW_RTP));
TrackControl track[] = processor.getTrackControls();
boolean encodingOk = false;
// Go through the tracks and try to program one of them to
// output g.711 data.
for (int i = 0; i < track.length; i++)
{
if (!encodingOk && track[i] instanceof FormatControl)
{
if (((FormatControl) track[i]).setFormat(format) == null)
{
track[i].setEnabled(false);
} else
{
encodingOk = true;
}
} else
{
// we could not set this track to g.711, so disable it
track[i].setEnabled(false);
}
}
// At this point, we have determined where we can send out
// g.711 data or not.
// realize the processor
if (encodingOk)
{
if (!new net.sf.fmj.ejmf.toolkit.util.StateWaiter(processor).blockingRealize())
{
System.err.println("Failed to realize");
return;
}
// get the output datasource of the processor and exit
// if we fail
DataSource ds = null;
try
{
ds = processor.getDataOutput();
} catch (NotRealizedError e)
{
e.printStackTrace();
System.exit(-1);
}
// hand this datasource to manager for creating an RTP
// datasink our RTP datasink will multicast the audio
try
{
String url = "rtp://192.168.1.99:49150/audio/1";
MediaLocator m = new MediaLocator(url);
DataSink d = Manager.createDataSink(ds, m);
d.open();
d.start();
System.out.println("Starting processor");
processor.start();
Thread.sleep(30000);
} catch (Exception e)
{
e.printStackTrace();
System.exit(-1);
}
}
當我運行這個源，輸出爲：沒有捕獲設備
可能是什麼問題？ :-(
編輯：我卸載了JMF從我的系統