如何获得音频使用Xuggler编码 [英] How to get Audio for encoding using Xuggler
问题描述
我正在写录制屏幕和音频的应用。虽然屏幕录制完美的作品，我有在获得使用JDK库的原始音频困难。这里的code：
{尝试
//现在，我们要循环
长STARTTIME = System.nanoTime（）; 的System.out.println（编码的图像......）;
而（！Thread.currentThread（）。isInterrupted（））{
//取截屏
屏幕的BufferedImage = robot.createScreenCapture（screenBounds）;
//转换为正确的图像类型
BufferedImage的bgrScreen = convertToType（屏幕，
BufferedImage.TYPE_3BYTE_BGR）; // EN code图像
writer.en codeVideo（0，bgrScreen，System.nanoTime（）
- startTime时，TimeUnit.NANOSECONDS）; / *需要使用xuggler获得音频这里，然后带code。就像是 WaveData WD =新WaveData（）; TargetDataLine的线;
AUS的AudioInputStream =新的AudioInputStream（线）; 短[] =样品getSourceSamples（）;
writer.en codeAudio（0，样本）; * /
如果（timeCreation小于10）{
timeCreation = getGMTTime（）;
}
//睡眠帧率毫秒
尝试{
视频下载（（长）（1000 / FRAME_RATE.getDouble（）））;
}赶上（例外前）{
通信System.err.println（停止......）;
打破;
} }
//最后，我们告诉笔者，关闭和写入如果拖车
//需要
} {最后
writer.close（）;
}
这页面有一些伪code像
而（haveMoreAudio（））
{
短[] =样品getSourceSamples（）;
writer.en codeAudio（0，样本）;
}
但究竟应该怎么为 getSourceSamples（）？
另外，奖金的问题 - 是否有可能从多个麦克风可以选择这种方法。
？另请参阅：
<一href=\"http://stackoverflow.com/questions/13839850/xuggler-encoding-and-muxing/13934751?noredirect=1#comment32570748_13934751\">Xuggler编码和多路复用
试试这个：
//选择一个格式。需要16比特，其余部分可被设置为任何
//这是更好地枚举系统支持的格式，因为函数getline（）可以与任何特定的格式错误了
AudioFormat的AudioFormat的=新AudioFormat的（44100.0F，16，2，真，假）;//获取默认的TargetDataLine的与该格式
DataLine.Info dataLineInfo =新DataLine.Info（TargetDataLine.class，AudioFormat的）;
TargetDataLine的行=（TargetDataLine的）AudioSystem.getLine（dataLineInfo）;//打开并开始捕捉音频
line.open（AudioFormat的，line.getBufferSize（））;
line.start（）;而（真）{
//读取为原始字节
字节[] = audioBytes新的字节[line.getBufferSize（）/ 2]; //最好的大小？
INT numBytesRead = 0;
numBytesRead = line.read（audioBytes，0，audioBytes.length）; //转换为签订短裤重新presenting样本
INT numSamplesRead = numBytesRead / 2;
短[] = audioSamples新的短[numSamplesRead]
如果（format.isBigEndian（））{
的for（int i = 0; I＆LT; numSamplesRead;我++）{
audioSamples [I] =（短）（（audioBytes [2 * 1] - ;＆下; 8）| audioBytes [2 * I + 1]）;
}
}
其他{
的for（int i = 0; I＆LT; numSamplesRead;我++）{
audioSamples [I] =（短）（（audioBytes [2 * I + 1];＆下; 8）| audioBytes [2 * I]）;
}
} //使用audioSamples在Xuggler等
}
要选择一个麦克风，你可能不得不这样做：
Mixer.Info [] = mixerInfo AudioSystem.getMixerInfo（）;
//通过看这里选择一个混频器，混频器不同的应该是不同的输入
INT selectedMixerIndex = 0;
调音台调音台= AudioSystem.getMixer（mixerInfo [selectedMixerIndex]）;
TargetDataLine的行=（TargetDataLine的）mixer.getLine（dataLineInfo）;
我认为这可能是多个麦克风将在一个混频器不同来源的数据线出现。在这种情况下，你必须打开它们，并调用 dataLine.getControl（FloatControl.Type.MASTER_GAIN）.setValue（体积）; 来打开和关闭它们
请参阅：
<一href=\"http://$c$c.google.com/p/speech-recognition-java-hidden-markov-model-vq-mfcc/source/browse/trunk/SpeechRecognitionHMM/src/org/ioe/tprsa/audio/WaveData.java\"相对=nofollow> WaveData.java
声波 如何设置<一个SourceDataLine的是Java /量一> I'm writing an application that records the screen and audio. While the screen recording works perfectly, I'm having difficulty in getting the raw audio using the JDK libraries. Here's the code: This page has some pseudo code like but what exactly should I do for Also, a bonus question - is it possible to choose from multiple microphones in this approach? See also:
Xuggler encoding and muxing Try this: To pick a microphone, you'd probably have to do this: I think it's possible that multiple microphones will show up in one mixer as different source data lines. In that case you'd have to open them and call See:
WaveData.java Sound wave from TargetDataLine How to set volume of a SourceDataLine in Java 这篇关于如何获得音频使用Xuggler编码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！try {
// Now, we're going to loop
long startTime = System.nanoTime();
System.out.println("Encoding Image.....");
while (!Thread.currentThread().isInterrupted()) {
// take the screen shot
BufferedImage screen = robot.createScreenCapture(screenBounds);
// convert to the right image type
BufferedImage bgrScreen = convertToType(screen,
BufferedImage.TYPE_3BYTE_BGR);
// encode the image
writer.encodeVideo(0, bgrScreen, System.nanoTime()
- startTime, TimeUnit.NANOSECONDS);
/* Need to get audio here and then encode using xuggler. Something like
WaveData wd = new WaveData();
TargetDataLine line;
AudioInputStream aus = new AudioInputStream(line);
short[] samples = getSourceSamples();
writer.encodeAudio(0, samples); */
if (timeCreation < 10) {
timeCreation = getGMTTime();
}
// sleep for framerate milliseconds
try {
Thread.sleep((long) (1000 / FRAME_RATE.getDouble()));
} catch (Exception ex) {
System.err.println("stopping....");
break;
}
}
// Finally we tell the writer to close and write the trailer if
// needed
} finally {
writer.close();
}
while(haveMoreAudio())
{
short[] samples = getSourceSamples();
writer.encodeAudio(0, samples);
}
getSourceSamples()?// Pick a format. Need 16 bits, the rest can be set to anything
// It is better to enumerate the formats that the system supports, because getLine() can error out with any particular format
AudioFormat audioFormat = new AudioFormat(44100.0F, 16, 2, true, false);
// Get default TargetDataLine with that format
DataLine.Info dataLineInfo = new DataLine.Info( TargetDataLine.class, audioFormat );
TargetDataLine line = (TargetDataLine) AudioSystem.getLine(dataLineInfo);
// Open and start capturing audio
line.open(audioFormat, line.getBufferSize());
line.start();
while (true) {
// read as raw bytes
byte[] audioBytes = new byte[ line.getBufferSize() / 2 ]; // best size?
int numBytesRead = 0;
numBytesRead = line.read(audioBytes, 0, audioBytes.length);
// convert to signed shorts representing samples
int numSamplesRead = numBytesRead / 2;
short[] audioSamples = new short[ numSamplesRead ];
if (format.isBigEndian()) {
for (int i = 0; i < numSamplesRead; i++) {
audioSamples[i] = (short)((audioBytes[2*i] << 8) | audioBytes[2*i + 1]);
}
}
else {
for (int i = 0; i < numSamplesRead; i++) {
audioSamples[i] = (short)((audioBytes[2*i + 1] << 8) | audioBytes[2*i]);
}
}
// use audioSamples in Xuggler etc
}
Mixer.Info[] mixerInfo = AudioSystem.getMixerInfo();
// Look through and select a mixer here, different mixers should be different inputs
int selectedMixerIndex = 0;
Mixer mixer = AudioSystem.getMixer(mixerInfo[ selectedMixerIndex ]);
TargetDataLine line = (TargetDataLine) mixer.getLine(dataLineInfo);
dataLine.getControl(FloatControl.Type.MASTER_GAIN).setValue( volume ); to turn them on and off.
