1.Java切割录音,目前我用到的是java的原生Jar包,并没有用到框架,接下来我就把代码分享一下 首先了解整体过程:如果你的音频文件是wav就直接切割,如果你的音频文件是mp3,先转换成wav格式然后进行切割:
1: Maven 依赖
<dependency>
<groupId>it.sauronsoftware</groupId>
<artifactId>jave</artifactId>
<version>1.0.2</version>
</dependency>
<dependency>
<groupId>org</groupId>
<artifactId>jaudiotagger</artifactId>
<version>2.0.3</version>
</dependency>
<dependency>
<groupId>com.googlecode.soundlibs</groupId>
<artifactId>mp3spi</artifactId>
<version>1.9.5.4</version>
</dependency>
用到的方法工具类(下面有main方法测试)
@Component
@Slf4j
public class FileTimeUtils {
public static Double getFileTime(String fileName) {
//获取录音文件总时长
File file = null;
String netUrl = fileName;
if (netUrl.startsWith("https://")) {
file = FileUtils.getNetUrlHttp(netUrl);
} else {
file = FileUtils.getNetUrlHttp(netUrl);
}
Encoder encoder = new Encoder();
MultimediaInfo m = null;
try {
m = encoder.getInfo(file);
} catch (EncoderException e) {
log.error(e + "获取录音文件时间长度报错!请检查");
e.printStackTrace();
}
long duration = m.getDuration();
long s = duration / 1000;
return (double) s;
}
/**
* 截取wav音频文件
*
* @param source 源文件地址
* @param targetFile 目标文件地址
* @param start 截取开始时间(秒)
* @param end 截取结束时间(秒)
* <p>
* return 截取成功返回true,否则返回false
*/
public static boolean cut(String source, String targetFile, int start, int end) {
try {
if (!source.toLowerCase().endsWith(".wav") || !targetFile.toLowerCase().endsWith(".wav")) {
return false;
}
File wav = new File(source);
if (!wav.exists()) {
return false;
}
//总时长(秒)
long t1 = getTimeLen(wav);
if (start < 0 || end <= 0 || start >= t1 || end > t1 || start >= end) {
return false;
}
FileInputStream fis = new FileInputStream(wav);
//音频数据大小(44为128kbps比特率wav文件头长度)
long wavSize = wav.length() - 44;
//截取的音频数据大小
long splitSize = (wavSize / t1) * (end - start);
//截取时跳过的音频数据大小
long skipSize = (wavSize / t1) * start;
int splitSizeInt = Integer.parseInt(String.valueOf(splitSize));
int skipSizeInt = Integer.parseInt(String.valueOf(skipSize));
//存放文件大小,4代表一个int占用字节数
ByteBuffer buf1 = ByteBuffer.allocate(4);
//放入文件长度信息
buf1.putInt(splitSizeInt + 36);
//代表文件长度
byte[] flen = buf1.array();
//存放音频数据大小,4代表一个int占用字节数
ByteBuffer buf2 = ByteBuffer.allocate(4);
//放入数据长度信息
buf2.putInt(splitSizeInt);
//代表数据长度
byte[] dlen = buf2.array();
//数组反转
flen = reverse(flen);
dlen = reverse(dlen);
//定义wav头部信息数组
byte[] head = new byte[44];
//读取源wav文件头部信息
fis.read(head, 0, head.length);
/**
* 4代表一个int占用字节数
* 替换原头部信息里的文件长度
* 替换原头部信息里的数据长度
*/
for (int i = 0; i < 4; i++) {
head[i + 4] = flen[i];
head[i + 40] = dlen[i];
}
/** 存放截取的音频数据
* 放入修改后的头部信息
*/
byte[] fbyte = new byte[splitSizeInt + head.length];
for (int i = 0; i < head.length; i++) {
fbyte[i] = head[i];
}
/**
* 存放截取时跳过的音频数据
* 跳过不需要截取的数据
* 读取要截取的数据到目标数组
*/
byte[] skipBytes = new byte[skipSizeInt];
fis.read(skipBytes, 0, skipBytes.length);
fis.read(fbyte, head.length, fbyte.length - head.length);
fis.close();
File target = new File(targetFile);
//如果目标文件已存在,则删除目标文件
if (target.exists()) {
target.delete();
}
FileOutputStream fos = new FileOutputStream(target);
fos.write(fbyte);
fos.flush();
fos.close();
} catch (IOException e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 获取音频文件总时长
*
* @param file 文件路径
* @return
*/
public static long getTimeLen(File file) {
long tlen = 0;
if (file != null && file.exists()) {
Encoder encoder = new Encoder();
try {
MultimediaInfo m = encoder.getInfo(file);
long ls = m.getDuration();
tlen = ls ;
} catch (Exception e) {
e.printStackTrace();
}
}
return tlen;
}
/**
* 数组反转
*
* @param array
*/
public static byte[] reverse(byte[] array) {
byte temp;
int len = array.length;
for (int i = 0; i < len / 2; i++) {
temp = array[i];
array[i] = array[len - 1 - i];
array[len - 1 - i] = temp;
}
return array;
}
/**
* mp3的字节数组生成wav文件
*
* @param sourceBytes
* @param targetPath
*/
public static boolean byteToWav(byte[] sourceBytes, String targetPath) {
if (sourceBytes == null || sourceBytes.length == 0) {
System.out.println("Illegal Argument passed to this method");
return false;
}
try (final ByteArrayInputStream bais = new ByteArrayInputStream(sourceBytes); final AudioInputStream sourceAIS = AudioSystem.getAudioInputStream(bais)) {
AudioFormat sourceFormat = sourceAIS.getFormat();
// 设置MP3的语音格式,并设置16bit
AudioFormat mp3tFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, sourceFormat.getSampleRate(), 16, sourceFormat.getChannels(), sourceFormat.getChannels() * 2, sourceFormat.getSampleRate(), false);
// 设置百度语音识别的音频格式
AudioFormat pcmFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, 16000, 16, 1, 2, 16000, false);
try (
// 先通过MP3转一次,使音频流能的格式完整
final AudioInputStream mp3AIS = AudioSystem.getAudioInputStream(mp3tFormat, sourceAIS);
// 转成百度需要的流
final AudioInputStream pcmAIS = AudioSystem.getAudioInputStream(pcmFormat, mp3AIS)) {
// 根据路径生成wav文件
AudioSystem.write(pcmAIS, AudioFileFormat.Type.WAVE, new File(targetPath));
}
return true;
} catch (IOException e) {
System.out.println("文件转换异常:" + e.getMessage());
return false;
} catch (UnsupportedAudioFileException e) {
System.out.println("文件转换异常:" + e.getMessage());
return false;
}
}
/**
* 将文件转成字节流
*
* @param filePath
* @return
*/
public static byte[] getBytes(String filePath) {
byte[] buffer = null;
try {
File file = new File(filePath);
FileInputStream fis = new FileInputStream(file);
ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
byte[] b = new byte[1000];
int n;
while ((n = fis.read(b)) != -1) {
bos.write(b, 0, n);
}
fis.close();
bos.close();
buffer = bos.toByteArray();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return buffer;
}
public static void main(String[] args) {
/*String source = "D:/test/test.mp3";
String targetPath = "D:/test/11111.wav";
byteToWav(getBytes(source), targetPath);
boolean cut = cut(targetPath, "D:/test/22222.wav", 0, 10);
System.out.println(cut);*/
/* File file = new File("D:/test/11111.wav");
String path = file.getPath();
String[] split =path.split("/");
System.out.println(split);
System.out.println(path);*/
String s = "[0,54930]";
String[] split = s.split(",");
String substring = split[1].substring(0, split[1].length() - 1);
System.out.println(split[1]);
System.out.println(substring);
} ```
//接下来是转换的代码。这里的切割方法只能针对wav格式,但是现在有很多音频文件是mp3个格式的;
/**
* mp3的字节数组生成wav文件
*
* @param sourceBytes
* @param targetPath
*/
public static boolean byteToWav(byte[] sourceBytes, String targetPath) {
if (sourceBytes == null || sourceBytes.length == 0) {
System.out.println("Illegal Argument passed to this method");
return false;
}
try (final ByteArrayInputStream bais = new ByteArrayInputStream(sourceBytes); final AudioInputStream sourceAIS = AudioSystem.getAudioInputStream(bais)) {
AudioFormat sourceFormat = sourceAIS.getFormat();
// 设置MP3的语音格式,并设置16bit
AudioFormat mp3tFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, sourceFormat.getSampleRate(), 16, sourceFormat.getChannels(), sourceFormat.getChannels() * 2, sourceFormat.getSampleRate(), false);
// 设置百度语音识别的音频格式
AudioFormat pcmFormat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, 16000, 16, 1, 2, 16000, false);
try (
// 先通过MP3转一次,使音频流能的格式完整
final AudioInputStream mp3AIS = AudioSystem.getAudioInputStream(mp3tFormat, sourceAIS);
// 转成百度需要的流
final AudioInputStream pcmAIS = AudioSystem.getAudioInputStream(pcmFormat, mp3AIS)) {
// 根据路径生成wav文件
AudioSystem.write(pcmAIS, AudioFileFormat.Type.WAVE, new File(targetPath));
}
return true;
} catch (IOException e) {
System.out.println("文件转换异常:" + e.getMessage());
return false;
} catch (UnsupportedAudioFileException e) {
System.out.println("文件转换异常:" + e.getMessage());
return false;
}
}