语音 pcm 转换 成 MP3 格式

package common; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; /** * PCM 转 MP3 * */ public class Pcm2Mp3 { public static void main(String[] agrs) throws Exception { convertAudioFiles("D:\\Temp\\16k_test.pcm", "D:\\Temp\\tnafcs.mp3"); } /** * @param src 待转换文件路径 * @param target 目标文件路径 * @throws IOException 抛出异常 */ public static String convertAudioFiles(String src, String target) throws IOException { FileInputStream fis = new FileInputStream(src); FileOutputStream fos = new FileOutputStream(target); //计算长度 byte[] buf = new byte[1024 * 4]; int size = fis.read(buf); int PCMSize = 0; while (size != -1) { PCMSize += size; size = fis.read(buf); } fis.close(); //填入参数，比特率等等。这里用的是16位单声道 8000 hz WaveHeader header = new WaveHeader(); //长度字段 = 内容的大小（PCMSize) + 头部字段的大小(不包括前面4字节的标识符RIFF以及fileLength本身的4字节) header.fileLength = PCMSize + (44 - 8); header.FmtHdrLeth = 16; header.BitsPerSample = 16; header.Channels = 1; header.FormatTag = 0x0001; header.SamplesPerSec = 16000;//正常速度是8000，这里写成了16000，速度加快一倍 header.BlockAlign = (short) (header.Channels * header.BitsPerSample / 8); header.AvgBytesPerSec = header.BlockAlign * header.SamplesPerSec; header.DataHdrLeth = PCMSize; byte[] h = header.getHeader(); assert h.length == 44; //WAV标准，头部应该是44字节 //write header fos.write(h, 0, h.length); //write data stream fis = new FileInputStream(src); size = fis.read(buf); while (size != -1) { fos.write(buf, 0, size); size = fis.read(buf); } fis.close(); fos.close(); System.out.println("PCM Convert to MP3 OK!"); return "ok"; } }