将mp3转换为wav的代码是：
package audio1;
import java.io.File;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
public class NewClass {
public static void main(String [] args){
try{
AudioFileFormat inputFileFormat = AudioSystem.getAudioFileFormat(new File("c:\\1.mp3"));
AudioInputStream ais = AudioSystem.getAudioInputStream(new File("c:\\1.mp3"));
AudioFormat audioFormat = ais.getFormat();
System.out.println("File Format Type: "+inputFileFormat.getType());
System.out.println("File Format String: "+inputFileFormat.toString());
System.out.println("File lenght: "+inputFileFormat.getByteLength());
System.out.println("Frame length: "+inputFileFormat.getFrameLength());
System.out.println("Channels: "+audioFormat.getChannels());
System.out.println("Encoding: "+audioFormat.getEncoding());
System.out.println("Frame Rate: "+audioFormat.getFrameRate());
System.out.println("Frame Size: "+audioFormat.getFrameSize());
System.out.println("Sample Rate: "+audioFormat.getSampleRate());
System.out.println("Sample size (bits): "+audioFormat.getSampleSizeInBits());
System.out.println("Big endian: "+audioFormat.isBigEndian());
System.out.println("Audio Format String: "+audioFormat.toString());
AudioInputStream encodedASI = AudioSystem.getAudioInputStream(AudioFormat.Encoding.PCM_SIGNED, ais);
try{
int i = AudioSystem.write(encodedASI, AudioFileFormat.Type.WAVE, new File("c:\\converted.wav"));
System.out.println("Bytes Written: "+i);
}catch(Exception e){
e.printStackTrace();
}
}catch(Exception e){
e.printStackTrace();
}
}
}
但我得到以下输出：
File Format Type: MP3
File Format String: MP3 (.mp3) file, byte length: 9631340, data format: MPEG1L3 48000.0 Hz, unknown bits per sample, stereo, unknown frame size, 41.666668 frames/second, , frame length: 10030
File lenght: 9631340
Frame length: 10030
Channels: 2
Encoding: MPEG1L3
Frame Rate: 41.666668
Frame Size: -1
Sample Rate: 48000.0
Sample size (bits): -1
Big endian: true
Audio Format String: MPEG1L3 48000.0 Hz, unknown bits per sample, stereo, unknown frame size, 41.666668 frames/second,
java.lang.ArrayIndexOutOfBoundsException: 1
at org.tritonus.sampled.convert.javalayer.MpegFormatConversionProvider$DecodedMpegAudioInputStream$DMAISObuffer.append(MpegFormatConversionProvider.java:386)
at javazoom.jl.decoder.Obuffer.appendSamples(Unknown Source)
at javazoom.jl.decoder.SynthesisFilter.compute_pcm_samples(Unknown Source)
at javazoom.jl.decoder.SynthesisFilter.calculate_pcm_samples(Unknown Source)
at javazoom.jl.decoder.LayerIIIDecoder.decode(Unknown Source)
at javazoom.jl.decoder.LayerIIIDecoder.decodeFrame(Unknown Source)
at javazoom.jl.decoder.Decoder.decodeFrame(Unknown Source)
at org.tritonus.sampled.convert.javalayer.MpegFormatConversionProvider$DecodedMpegAudioInputStream.execute(MpegFormatConversionProvider.java:307)
at org.tritonus.share.TCircularBuffer.read(TCircularBuffer.java:138)
at org.tritonus.share.sampled.convert.TAsynchronousFilteredAudioInputStream.read(TAsynchronousFilteredAudioInputStream.java:194)
at javax.sound.sampled.AudioInputStream.read(AudioInputStream.java:292)
at com.sun.media.sound.PCMtoPCMCodec$PCMtoPCMCodecStream.read(PCMtoPCMCodec.java:506)
at com.sun.media.sound.SunFileWriter$NoCloseInputStream.read(SunFileWriter.java:199)
at java.io.SequenceInputStream.read(SequenceInputStream.java:208)
at java.io.SequenceInputStream.read(SequenceInputStream.java:211)
at java.io.InputStream.read(InputStream.java:101)
at com.sun.media.sound.WaveFileWriter.writeWaveFile(WaveFileWriter.java:247)
at com.sun.media.sound.WaveFileWriter.write(WaveFileWriter.java:145)
at javax.sound.sampled.AudioSystem.write(AudioSystem.java:1354)
at audio1.NewClass.main(NewClass.java:33)
任何人都可以帮我解决我做错的事吗？
答案 0 :(得分：10)
public static byte [] getAudioDataBytes(byte [] sourceBytes, AudioFormat audioFormat) throws UnsupportedAudioFileException, IllegalArgumentException, Exception{
if(sourceBytes == null || sourceBytes.length == 0 || audioFormat == null){
throw new IllegalArgumentException("Illegal Argument passed to this method");
}
ByteArrayInputStream bais = null;
ByteArrayOutputStream baos = null;
AudioInputStream sourceAIS = null;
AudioInputStream convert1AIS = null;
AudioInputStream convert2AIS = null;
try{
bais = new ByteArrayInputStream(sourceBytes);
sourceAIS = AudioSystem.getAudioInputStream(bais);
AudioFormat sourceFormat = sourceAIS.getFormat();
AudioFormat convertFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, sourceFormat.getSampleRate(), 16, sourceFormat.getChannels(), sourceFormat.getChannels()*2, sourceFormat.getSampleRate(), false);
convert1AIS = AudioSystem.getAudioInputStream(convertFormat, sourceAIS);
convert2AIS = AudioSystem.getAudioInputStream(audioFormat, convert1AIS);
baos = new ByteArrayOutputStream();
byte [] buffer = new byte[8192];
while(true){
int readCount = convert2AIS.read(buffer, 0, buffer.length);
if(readCount == -1){
break;
}
baos.write(buffer, 0, readCount);
}
return baos.toByteArray();
} catch(UnsupportedAudioFileException uafe){
//uafe.printStackTrace();
throw uafe;
} catch(IOException ioe){
//ioe.printStackTrace();
throw ioe;
} catch(IllegalArgumentException iae){
//iae.printStackTrace();
throw iae;
} catch (Exception e) {
//e.printStackTrace();
throw e;
}finally{
if(baos != null){
try{
baos.close();
}catch(Exception e){
}
}
if(convert2AIS != null){
try{
convert2AIS.close();
}catch(Exception e){
}
}
if(convert1AIS != null){
try{
convert1AIS.close();
}catch(Exception e){
}
}
if(sourceAIS != null){
try{
sourceAIS.close();
}catch(Exception e){
}
}
if(bais != null){
try{
bais.close();
}catch(Exception e){
}
}
}
}
这里的sourceBytes代表MP3文件或WAV文件。 audioFormat是您希望转换的PCM格式。我们还需要在classpath中输入javazoom.com中的mp3spi.jar，tritonus_mp3.jar，jl * .jar，tritonus_share.jar。希望这对其他人有所帮助。
Java 7版本：
public static byte [] getAudioDataBytes(byte [] sourceBytes, AudioFormat audioFormat) throws UnsupportedAudioFileException, IllegalArgumentException, Exception {
if(sourceBytes == null || sourceBytes.length == 0 || audioFormat == null){
throw new IllegalArgumentException("Illegal Argument passed to this method");
}
try (final ByteArrayInputStream bais = new ByteArrayInputStream(sourceBytes);
final AudioInputStream sourceAIS = AudioSystem.getAudioInputStream(bais)) {
AudioFormat sourceFormat = sourceAIS.getFormat();
AudioFormat convertFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, sourceFormat.getSampleRate(), 16, sourceFormat.getChannels(), sourceFormat.getChannels()*2, sourceFormat.getSampleRate(), false);
try (final AudioInputStream convert1AIS = AudioSystem.getAudioInputStream(convertFormat, sourceAIS);
final AudioInputStream convert2AIS = AudioSystem.getAudioInputStream(audioFormat, convert1AIS);
final ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
byte [] buffer = new byte[8192];
while(true){
int readCount = convert2AIS.read(buffer, 0, buffer.length);
if(readCount == -1){
break;
}
baos.write(buffer, 0, readCount);
}
return baos.toByteArray();
}
}
}
的Maven：
<dependency>
<groupId>com.googlecode.soundlibs</groupId>
<artifactId>mp3spi</artifactId>
<version>1.9.5-1</version>
</dependency>
<dependency>
<groupId>com.googlecode.soundlibs</groupId>
<artifactId>jlayer</artifactId>
<version>1.0.1-1</version>
<exclusions>
<exclusion>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</exclusion>
</exclusions>
</dependency>