合併使用JavaCV 2個視頻，第二視頻沒有聲音

Question

這是我使用的代碼：

public void stopRecording() throws Exception, com.googlecode.javacv.FrameRecorder.Exception { 

    runAudioThread = false; 

    if (recorder != null && recording) { 
     recording = false; 
     Log.v(LOG_TAG, "Finishing recording, calling stop and release on recorder"); 
     try { 
      recorder.stop(); 
      recorder.release(); 
     } catch (FFmpegFrameRecorder.Exception e) { 
      e.printStackTrace(); 
     } 

    } 
    Log.i(LOG_TAG, "filename = " + ffmpeg_link); 
    if (i > 0) { 
     Log.i(LOG_TAG, "!!!!!!!!!WILL CONCATENATE"); 
     FrameGrabber grabber1 = new FFmpegFrameGrabber(pathStart + "/JavaCV/stream0.mp4"); 
     grabber1.start(); 
     Log.i(LOG_TAG, "graber1.start"); 
     FrameGrabber grabber2 = new FFmpegFrameGrabber(pathStart + "/JavaCV/stream1.mp4"); 
     grabber2.start(); 
     Log.i(LOG_TAG, "graber2.start"); 
     FrameRecorder recorder2 = new FFmpegFrameRecorder(pathStart + "/JavaCV/output.mp4", grabber1.getImageWidth(), grabber1.getImageHeight(), grabber1.getAudioChannels()); 
     recorder2.setFrameRate(grabber1.getFrameRate()); 
     recorder2.setSampleFormat(grabber1.getSampleFormat()); 
     recorder2.setSampleRate(grabber1.getSampleRate()); 
     Log.i(LOG_TAG, "Recorder.start"); 
     recorder2.start(); 
     Frame frame; 
     int j = 0; 
     while ((frame = grabber1.grabFrame()) != null) { 
      j++; 
      recorder2.record(frame); 
      Log.i(LOG_TAG, "while1 nr:" + j + "Frame number: " + grabber1.getFrameNumber()); 
     } 
     Log.i(LOG_TAG, "after while1"); 
     while ((frame = grabber2.grabFrame()) != null) { 
      recorder2.record(frame); 
      Log.i(LOG_TAG, "while2"); 
     } 
     Log.i(LOG_TAG, "Recorder.stop"); 
     recorder2.stop(); 
     grabber2.stop(); 
     grabber1.stop(); 
     Log.i(LOG_TAG, "end concatenate"); 
    } 
    i++; 
    ffmpeg_link = pathStart + "/JavaCV/stream" + i + ".mp4"; 
    Log.i(LOG_TAG, "next filename = " + ffmpeg_link); 
} 

它的偉大工程，它管理合並的視頻，我唯一的問題是，它沒有第二個視頻的聲音。我怎樣才能把音頻通道放在第二個視頻上呢？

Answer 1

runAudioThread = false;這條線在停止錄音時，把音頻線放在假的位置，這就是爲什麼它沒有聲音的第二個視頻。