android - 使用 FFmpegFrameRecorder 合并音频文件

Question

我已经使用 ffmpegframerecorder 成功合并(未连接)两个 .aac 音频文件，但输出文件非常慢。
下面是我使用的代码。
有什么可以用来加速输出音频文件的吗？和帧率有关系吗？

FFmpegFrameGrabber frameGrabber =
                new FFmpegFrameGrabber("storage/sdcard0/Audio/audio.aac");      
        f=new File("/storage/sdcard0/Audio/audnew.aac");
        try {
            f.createNewFile();
        } catch (IOException e2) {
            // TODO Auto-generated catch block
            Log.d("def",e2.getLocalizedMessage());
        }
       FFmpegFrameGrabber grabber1 = new FFmpegFrameGrabber("/storage/sdcard0/Audio/smoke.aac");
        try {
            frameGrabber.start();
            grabber1.start();
        } catch (org.bytedeco.javacv.FrameGrabber.Exception e1) {
            // TODO Auto-generated catch block
            Log.d("here",e1.getLocalizedMessage());
        } 
        FFmpegFrameRecorder recorde = new FFmpegFrameRecorder(f, frameGrabber.getAudioChannels());
        try {
            recorde.setAudioCodec(AV_CODEC_ID_AAC);
            Log.d("12","here");
            recorde.setFrameRate(12);
            recorde.start();
            Frame frame1 = new Frame();
            Frame frame2 = new Frame();
            for (int i=0;i<1000000;i++)
            {
                frame1 = grabber1.grabFrame();
                frame2 = frameGrabber.grabFrame();
                if (frame1==null || frame2==null) {
                    Log.d("er","Failed cvQueryFrame");
                    frameGrabber.release();
                    grabber1.release();
                    break;
                }
                recorde.record(frame1);
                recorde.record(frame2);

            }
            recorde.stop();
            grabber1.stop();

        }catch(Exception e){
            Log.d("abc", e.getLocalizedMessage());
        }

Answer 1

帧frame1，frame2 = null；

            while ((frame1 = grabber1.grabFrame()) != null ||
                    (frame2 = grabber2.grabFrame()) != null) {

                recorder.record(frame1);
                recorder.record(frame2);

            }

使用它而不是 For 循环