在Android中,如何同步音频录制和同步播放?
我正在尝试编写一个函数,在后台播放乐器时记录用户的声音 我已经相当成功地让两个MediaPlayer几乎同时启动。使用Threads和CyclicBarrier,我能够在每次启动5毫秒内启动2个MediaPlayer,这听起来相当不错 问题是,每当我试图同时启动MediaRecorder和MediaPlayer时,它们之间都会有明显的延迟。这是有问题的,因为当我播放录制的音频和乐器时,它们彼此不同步,因为录制的开始时间与播放器不同 下面是我试图用于录音机和播放机的函数和两个线程。很抱歉这么长时间,但如果有人有更好的想法,我将非常感激:在Android中,如何同步音频录制和同步播放?,android,audio,synchronization,media-player,mediarecorder,Android,Audio,Synchronization,Media Player,Mediarecorder,我正在尝试编写一个函数,在后台播放乐器时记录用户的声音 我已经相当成功地让两个MediaPlayer几乎同时启动。使用Threads和CyclicBarrier,我能够在每次启动5毫秒内启动2个MediaPlayer,这听起来相当不错 问题是,每当我试图同时启动MediaRecorder和MediaPlayer时,它们之间都会有明显的延迟。这是有问题的,因为当我播放录制的音频和乐器时,它们彼此不同步,因为录制的开始时间与播放器不同 下面是我试图用于录音机和播放机的函数和两个线程。很抱歉这么长时间
private void onRecord(boolean start) {
if (start) {
final CyclicBarrier recordBarrier = new CyclicBarrier(2);
final CyclicBarrier postrecordBarrier = new CyclicBarrier(2);
Thread beatTask = new Thread(new RecordBeatPlayTask(recordBarrier, postrecordBarrier), "Thread 1");
Thread recordTask = new Thread(new RecordVoiceRecordTask(recordBarrier, postrecordBarrier), "Thread 2");
beatTask.start();
recordTask.start();
}
else {
mRecorder.stop();
mRecordBeatPlayer.stop();
mRecorder.release();
mRecorder = null;
mRecordBeatPlayer.release();
mRecordBeatPlayer = null;
}
}
private static class RecordVoiceRecordTask implements Runnable {
private CyclicBarrier barrier;
private CyclicBarrier barrier2;
public RecordVoiceRecordTask(CyclicBarrier barrier, CyclicBarrier barrier2) {
this.barrier = barrier;
this.barrier2 = barrier2;
}
public void run() {
try {
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mRecorderPath = Environment.getExternalStorageDirectory().getAbsolutePath();
mRecorderPath += "/HypeHopRecording.mp4";
mRecorder.setOutputFile(mRecorderPath);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
try {
mRecorder.prepare();
} catch (IOException e) {
Log.e("Recorder failed", "prepare() failed");
}
barrier.await();
mRecorder.start();
barrier2.await();
System.out.println(Thread.currentThread().getName() + " has crossed the barrier");
} catch (InterruptedException ex) {
Logger.getLogger(RecordActivity.class.getName()).log(Level.SEVERE, null, ex);
} catch (BrokenBarrierException ex) {
Logger.getLogger(RecordActivity.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
private static class RecordBeatPlayTask implements Runnable {
private CyclicBarrier barrier;
private CyclicBarrier barrier2;
public RecordBeatPlayTask(CyclicBarrier barrier, CyclicBarrier barrier2) {
this.barrier = barrier;
this.barrier2 = barrier2;
}
public void run() {
try {
mRecordBeatPlayer = new MediaPlayer();
try {
mRecordBeatPlayer.setDataSource(mBeatPath);
mRecordBeatPlayer.prepare();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
barrier.await();
mRecordBeatPlayer.start();
barrier2.await();
System.out.println(Thread.currentThread().getName() + " has crossed the barrier");
} catch (InterruptedException ex) {
Logger.getLogger(RecordActivity.class.getName()).log(Level.SEVERE, null, ex);
} catch (BrokenBarrierException ex) {
Logger.getLogger(RecordActivity.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
基本上,在“mRecordBeatPlayer.start()”和用户可以听到声音之间有一个deplay,您必须测试这个deplay。Hi!这是一个老问题。。。那么,你找到解决办法了吗?