如何从Java应用程序中传输实时视频？

老实说，不要在JMF上浪费时间，您可以认为这已经死了。这是使用h.264对rtmp流进行屏幕截图的方法（此示例感谢tyreus@gmail.com）。如果代码未显示，请单击此处的pastebin：http

//pastebin.com/sJHwj0nW

    import com.xuggle.xuggler.Configuration;    import com.xuggle.xuggler.ICodec;    import com.xuggle.xuggler.IContainer;    import com.xuggle.xuggler.IContainerFormat;    import com.xuggle.xuggler.IPacket;    import com.xuggle.xuggler.IPixelFormat;    import com.xuggle.xuggler.IRational;    import com.xuggle.xuggler.IStream;    import com.xuggle.xuggler.IStreamCoder;    import com.xuggle.xuggler.IVideoPicture;    import com.xuggle.xuggler.video.ConverterFactory;    import com.xuggle.xuggler.video.IConverter;    import java.awt.AWTException;    import java.awt.Rectangle;    import java.awt.Robot;    import java.awt.image.BufferedImage;    import java.io.IOException;    import java.io.InputStream;    import java.util.Properties;    public class XugglerRtmpReferenceImpl {       private static String url = "rtmp://your.test.server/screen/";       private static String fileName = "test/teststream";       private static int framesToEnpre = 60;       private static int x = 0;       private static int y = 0;       private static int height = 480;       private static int width = 640;       public static void main(String[] args) {IContainer container = IContainer.make();IContainerFormat containerFormat_live = IContainerFormat.make();containerFormat_live.setOutputFormat("flv", url + fileName, null);container.setInputBufferLength(0);int retVal = container.open(url + fileName, IContainer.Type.WRITE, containerFormat_live);if (retVal < 0) {    System.err.println("Could not open output container for live stream");    System.exit(1);}IStream stream = container.addNewStream(0);IStreamCoder prer = stream.getStreamCoder();ICodec prec = ICodec.findEncodingCodec(ICodec.ID.CODEC_ID_H264);prer.setNumPicturesInGroupOfPictures(5);prer.setCodec(prec);prer.setBitRate(200000);prer.setPixelType(IPixelFormat.Type.YUV420P);prer.setHeight(height);prer.setWidth(width);System.out.println("[ENCODER] video size is " + width + "x" + height);prer.setFlag(IStreamCoder.Flags.FLAG_QSCALE, true);prer.setGlobalQuality(0);IRational frameRate = IRational.make(5, 1);prer.setframeRate(frameRate);prer.setTimebase(IRational.make(frameRate.getDenominator(), frameRate.getNumerator()));Properties props = new Properties();InputStream is = XugglerRtmpReferenceImpl.class.getResourceAsStream("/libx264-normal.ffpreset");try {    props.load(is);} catch (IOException e) {    System.err.println("You need the libx264-normal.ffpreset file from the Xuggle distribution in your classpath.");    System.exit(1);}Configuration.configure(props, prer);prer.open();container.writeHeader();long firstTimeStamp = System.currentTimeMillis();long lastTimeStamp = -1;int i = 0;try {    Robot robot = new Robot();    while (i < framesToEnpre) {        //long iterationStartTime = System.currentTimeMillis();        long now = System.currentTimeMillis();        //grab the screenshot        BufferedImage image = robot.createScreenCapture(new Rectangle(x, y, width, height));        //convert it for Xuggler        BufferedImage currentScreenshot = new BufferedImage(image.getWidth(), image.getHeight(), BufferedImage.TYPE_3BYTE_BGR);        currentScreenshot.getGraphics().drawImage(image, 0, 0, null);        //start the encoding process        IPacket packet = IPacket.make();        IConverter converter = ConverterFactory.createConverter(currentScreenshot, IPixelFormat.Type.YUV420P);        long timeStamp = (now - firstTimeStamp) * 1000;         IVideoPicture outframe = converter.toPicture(currentScreenshot, timeStamp);        if (i == 0) { //make first frame keyframe outframe.setKeyframe(true);        }        outframe.setQuality(0);        prer.enpreVideo(packet, outframe, 0);        outframe.delete();        if (packet.isComplete()) { container.writePacket(packet); System.out.println("[ENCODER] writing packet of size " + packet.getSize() + " for elapsed time " + ((timeStamp - lastTimeStamp) / 1000)); lastTimeStamp = timeStamp;        }        System.out.println("[ENCODER] enpred image " + i + " in " + (System.currentTimeMillis() - now));        i++;        try { Thread.sleep(Math.max((long) (1000 / frameRate.getDouble()) - (System.currentTimeMillis() - now), 0));        } catch (InterruptedException e) { e.printStackTrace();        }    }} catch (AWTException e) {    e.printStackTrace();}container.writeTrailer();        }    }