我知道这个问题已经讨论过了,但是在谷歌搜索了很多之后,我无法找到为什么两个.wav合并文件无法播放的解决方案?我正在将两个.wav合并到一个文件中。第二。没什么。点击播放按钮后会播放一​​秒钟。请给我建议或检查我的代码以识别问题。谢谢,我正在使用两个合并两个文件的代码如下:

    private static final int RECORDER_SAMPLERATE = 44100;
private static final int RECORDER_BPP = 16;
private void CombineWaveFile(String file1, String file2, String path) {
    FileInputStream in1 = null, in2 = null;
    FileOutputStream out = null;
    long totalAudioLen = 0;
    long totalDataLen = totalAudioLen + 36;
    long longSampleRate = RECORDER_SAMPLERATE;
    int channels = 2;
    long byteRate = RECORDER_BPP * RECORDER_SAMPLERATE * channels / 8;

    byte[] data = new byte[8192];

    try {
        in1 = new FileInputStream(file1);
        in2 = new FileInputStream(file2);
        File file_path = new File(path);
        file_path.setReadable(true);
        out = new FileOutputStream(file_path);

        totalAudioLen = in1.getChannel().size() + in2.getChannel().size();
        totalDataLen = totalAudioLen + 36;

        WriteWaveFileHeader(out, totalAudioLen, totalDataLen,
                longSampleRate, channels, byteRate);

        while (in1.read(data) != -1) {

            out.write(data);

        }
        while (in2.read(data) != -1) {

            out.write(data);
        }

        out.close();
        in1.close();
        in2.close();
        Log.e("mPAthTemp Combine", file_path.toString());
        Log.e("mFileSecond Combine", file2);

        Toast.makeText(this, "Done!!", Toast.LENGTH_LONG).show();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

private void WriteWaveFileHeader(FileOutputStream out, long totalAudioLen,
        long totalDataLen, long longSampleRate, int channels, long byteRate)
        throws IOException {

    byte[] header = new byte[44];

    header[0] = 'R';
    header[1] = 'I';
    header[2] = 'F';
    header[3] = 'F';
    header[4] = (byte) (totalDataLen & 0xff);
    header[5] = (byte) ((totalDataLen >> 8) & 0xff);
    header[6] = (byte) ((totalDataLen >> 16) & 0xff);
    header[7] = (byte) ((totalDataLen >> 24) & 0xff);
    header[8] = 'W';
    header[9] = 'A';
    header[10] = 'V';
    header[11] = 'E';
    header[12] = 'f';
    header[13] = 'm';
    header[14] = 't';
    header[15] = ' ';
    header[16] = 16;
    header[17] = 0;
    header[18] = 0;
    header[19] = 0;
    header[20] = 1;
    header[21] = 0;
    header[22] = (byte) channels;
    header[23] = 0;
    header[24] = (byte) (longSampleRate & 0xff);
    header[25] = (byte) ((longSampleRate >> 8) & 0xff);
    header[26] = (byte) ((longSampleRate >> 16) & 0xff);
    header[27] = (byte) ((longSampleRate >> 24) & 0xff);
    header[28] = (byte) (byteRate & 0xff);
    header[29] = (byte) ((byteRate >> 8) & 0xff);
    header[30] = (byte) ((byteRate >> 16) & 0xff);
    header[31] = (byte) ((byteRate >> 24) & 0xff);
    header[32] = (byte) (2 * 16 / 8);
    header[33] = 0;
    header[34] = RECORDER_BPP;
    header[35] = 0;
    header[36] = 'd';
    header[37] = 'a';
    header[38] = 't';
    header[39] = 'a';
    header[40] = (byte) (totalAudioLen & 0xff);
    header[41] = (byte) ((totalAudioLen >> 8) & 0xff);
    header[42] = (byte) ((totalAudioLen >> 16) & 0xff);
    header[43] = (byte) ((totalAudioLen >> 24) & 0xff);

    out.write(header, 0, 44);
}

}

我用来播放音频文件的代码如下:
private void startPlaying(String file_path) {
    mPlayer = new MediaPlayer();
    try {
        Log.e("playing", file_path);
        mPlayer.setDataSource(file_path);
        mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        mPlayer.prepare();

        mPlayer.start();
        mPlayer.setOnCompletionListener(new OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mp) {
                // TODO Auto-generated method stub
                showToast("Complete");
                setProgressBar(false);
                mButtonStart.setEnabled(true);
                mButtonStop.setEnabled(false);
                stopPlaying();
            }
        });

    } catch (IllegalArgumentException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (SecurityException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalStateException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

}

给我一个解决方案,为什么会发生这种情况。谢谢..

最佳答案

我不知道是什么导致了您的特定问题,但是此代码中充斥着错误,其中的一些组合可能会解释您的问题。这是我通过检查发现的:

  • 假定传入文件的格式相同(16位立体声,44100等),无需检查。
  • 根本不解析传入的文件。因此,它将传入文件的 header 视为音频数据,并将其附加到传出文件中(喜欢!)。考虑到它仔细地为输出文件写了一个头,这特别奇怪。
  • 它不检查read()的返回值,因此在某些情况下(尤其是每个传入文件的最后一个块)写入比读取的块大的块。

  • 也许您需要一些新的示例代码。 JSResources可能是一个不错的起点。

    07-24 09:49
    查看更多