无法打开直播视频的输出容器 [英] Could not open output container for live stream
问题描述
我正在研究YouTube广播Java程序.到目前为止，我可以使用以下程序创建live event:
I am working on YouTube broadcasting Java program. So far, I can create live event using this program:
https://github.com/youtube/api-samples/tree /master/java
有关我到目前为止得到的更多信息，请参阅我的另一个问题:
For more detail what I am getting so far, please see my another question:
https://stackoverflow.com/questions/30449366/如何使用YouTube-Broadcast-in-java发送视频事件直播活动
现在，接下来我想创建一个视频流，该视频流将传递到实时流YouTube API，以便我的视频将作为实时事件在YouTube上进行广播.
Now, the next thing is I want to create a video stream which will be passed to live streaming YouTube APIs so that my video will be broadcasting as Live Event on YouTube.
为此，我正在使用Xuggler库5.2.但是，当我尝试为Xuggler运行示例程序时，我得到以下消息，但无法正常工作，也无法启动网络摄像头.
For this, I am using Xuggler library 5.2. However, when I try to run sample program for Xuggler so I get following message and neither works anything nor my webcam starts.
源代码:
import java.awt.Dimension;
import java.awt.image.BufferedImage;
import com.github.sarxos.webcam.Webcam;
import com.github.sarxos.webcam.WebcamResolution;
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;
public class HelloWorld {
public static void main(String[] args) {
IContainer container = IContainer.make();
IContainerFormat containerFormat_live = IContainerFormat.make();
containerFormat_live.setOutputFormat("flv", "rtmp://a.rtmp.youtube.com" + "/"+ "live2", null);
container.setInputBufferLength(0);
int retVal = container.open("rtmp://a.rtmp.youtube.com" + "/"+ "live2", IContainer.Type.WRITE, containerFormat_live);
if (retVal < 0) {
System.err.println("Could not open output container for live stream");
System.exit(1);
}
Dimension size = WebcamResolution.QVGA.getSize();
IStream stream = container.addNewStream(0);
IStreamCoder coder = stream.getStreamCoder();
ICodec codec = ICodec.findEncodingCodec(ICodec.ID.CODEC_ID_H264);
coder.setNumPicturesInGroupOfPictures(4);
coder.setCodec(codec);
coder.setBitRate(500000);
coder.setPixelType(IPixelFormat.Type.YUV420P);
coder.setHeight(size.height);
coder.setWidth(size.width);
System.out.println("[ENCODER] video size is " + size.width + "x" + size.height);
coder.setFlag(IStreamCoder.Flags.FLAG_QSCALE, true);
coder.setGlobalQuality(0);
IRational frameRate = IRational.make(24, 1);
coder.setFrameRate(frameRate);
coder.setTimeBase(IRational.make(frameRate.getDenominator(), frameRate.getNumerator()));
coder.open();
container.writeHeader();
long firstTimeStamp = System.currentTimeMillis();
long lastTimeStamp = -1;
int i = 0;
try {
// Robot robot = new Robot();
Webcam webcam = Webcam.getDefault();
webcam.setViewSize(size);
webcam.open();
while (i < 100000000) {
//long iterationStartTime = System.currentTimeMillis();
long now = System.currentTimeMillis();
//grab the screenshot
BufferedImage image = webcam.getImage();
//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);
coder.encodeVideo(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] encoded 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 (Exception e) {
e.printStackTrace();
}
}
}
在运行时，收到此消息:
On running, getting this message:
23:13:38,807 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml]
23:13:38,808 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.xml]
23:13:38,811 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Setting up default configuration.
23:13:38,878 |-WARN in ch.qos.logback.core.ConsoleAppender[console] - This appender no longer admits a layout as a sub-component, set an encoder instead.
23:13:38,878 |-WARN in ch.qos.logback.core.ConsoleAppender[console] - To ensure compatibility, wrapping your layout in LayoutWrappingEncoder.
23:13:38,878 |-WARN in ch.qos.logback.core.ConsoleAppender[console] - See also http://logback.qos.ch/codes.html#layoutInsteadOfEncoder for details
23:13:46.644 [main] ERROR org.ffmpeg - RTMP_ReadPacket, failed to read RTMP packet header
Could not open output container for live stream
23:13:46.650 [main] ERROR com.xuggle.xuggler - URL: rtmp://a.rtmp.youtube.com/live2; Error: could not open file (../../../../../../../csrc/com/xuggle/xuggler/Container.cpp:516)
我不明白怎么了.为什么我的网络摄像头无法启动?
I don't understand what's going wrong. Why my webcam won't start?
推荐答案
读取xuggler库5.2 jar的清单文件(MANIFEST.MF)，以获取正确版本的依赖项jar，收集正确的jar版本并将其添加到类路径中以进行解析依赖性和版本问题.
Read manifest file (MANIFEST.MF) of xuggler library 5.2 jar for correct version of dependency jars, collect correct version jars and add them in the class path to resolve the dependency and version issues.
这篇关于无法打开直播视频的输出容器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
