我使用audioRecord类录制音频。现在我想将音频原始文件转换为* flac格式。我转换*原始文件为WAV下一方式：如何在Android中将音频原始转换为FLAC

private void copyWaveFile(String inFilename,String outFilename){

FileInputStream in = null;

FileOutputStream out = null;

long totalAudioLen = 0;

long totalDataLen = totalAudioLen + 36;

long longSampleRate = sampleRate;

int channels = 2;

long byteRate = RECORDER_BPP * sampleRate * channels/8;

byte[] data_pcm = new byte[mAudioBufferSize];

try {

in = new FileInputStream(inFilename);

out = new FileOutputStream(outFilename);

totalAudioLen = in.getChannel().size();

totalDataLen = totalAudioLen + 36;

Log.i(TAG,"File size: " + totalDataLen);

WriteWaveFileHeader(out, totalAudioLen, totalDataLen,

longSampleRate, channels, byteRate);

while(in.read(data_pcm) != -1){

out.write(data_pcm);

}

in.close();

out.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

这段代码是负责文件头

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'; // RIFF/WAVE header

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'; // 'fmt ' chunk

header[13] = 'm';

header[14] = 't';

header[15] = ' ';

header[16] = 16; // 4 bytes: size of 'fmt ' chunk

header[17] = 0;

header[18] = 0;

header[19] = 0;

header[20] = 1; // format = 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); // block align

header[33] = 0;

header[34] = RECORDER_BPP; // bits per sample

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);

}

我不明白什么应该是* FLAC文件的参数

+0

hello用户，如果你能够将原始文件转换为flac，那么请分享你的方式，以便我可以帮助自己。我从1周内陷入这个问题。一点帮助，将不胜感激。 –

2014-07-19 11:30:58