怎么用java怎么获取音频播放时长(wav格式) RT,最好给个demo 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 /** * 获取视频播放总时长 * * @param fileName * 视频名称 * @param dir * 存放视频的目录 * @return * @throws IOException */ public static long getVideoPlayTime(String videoName, File dir) throws IOException{ Process p = null; if (isWindowsSystem()) { p = Runtime.getRuntime().exec( "cmd /c timelength.bat " + "\"" + dir.getPath() + "/" + videoName + ".wmv\""); } else { String cmd = "sh " + getMplayerBinPath() + "/timelength.sh " + dir.getPath()+ "/" + videoName + ".wmv"; p = Runtime.getRuntime().exec(cmd); } InputStream is = p.getInputStream(); InputStreamReader isr = new InputStreamReader(is); BufferedReader br = new BufferedReader(isr); String line = null; while ((line = br.readLine()) != null) { if(line != null){ if(line.startsWith("ID_LENGTH")){ String second = line.split("=")[1].trim(); int pos = 0; if((pos = second.indexOf(".")) != -1){ // 去除小数点后的数字 return Long.parseLong(second.substring(0, pos)); }else{ return Long.parseLong(second); } } } } try { br.close(); isr.close(); is.close(); } catch (Exception e) { } return 0; } /** * 格式化视频播放时长 * @param time * @return */ public static String formatVideoTimeLength(long time) { long s = time % 60; long m = (time / 60) % 60; long h = time / 3600; return toTimeString(h) + ":" + toTimeString(m) + ":" + toTimeString(s); }这个代码可以获取wmv视频文件的时长,你可以照着写,但是得知道wav文件头的格式 import java.io.File;import java.io.IOException;import javax.sound.sampled.AudioInputStream;import javax.sound.sampled.AudioSystem;import javax.sound.sampled.Clip;import javax.sound.sampled.LineUnavailableException;import javax.sound.sampled.UnsupportedAudioFileException;public class AudioLength { public static void main(String[] args) throws LineUnavailableException, UnsupportedAudioFileException, IOException { File file = new File("d:/test.wav"); Clip clip = AudioSystem.getClip(); AudioInputStream ais = AudioSystem.getAudioInputStream(file); clip.open(ais); System.out.println( clip.getMicrosecondLength() / 1000000D + " s" ); }} classpath 设置疑问 求Boolean类源代码 关于java隐式类型转换的一个问题-int\long\重载相关 JAVA可以处理GIF动画吗 怎样学习JAVA,有没有捷径? 初学者:请大虾们帮我看一下==比较符为什么不好使呢?? JAVA多态的问题 哪里能找到java的源代码? 小弟建了一个Java GUI技术交流,望大家支技 动态显示时间,请教! 想知道是否有这样一种算发 Java 往 Oracle的Blob字段里插入数据报错问题
* 获取视频播放总时长
*
* @param fileName
* 视频名称
* @param dir
* 存放视频的目录
* @return
* @throws IOException
*/
public static long getVideoPlayTime(String videoName, File dir) throws IOException{
Process p = null;
if (isWindowsSystem()) {
p = Runtime.getRuntime().exec(
"cmd /c timelength.bat " + "\"" + dir.getPath() + "/" + videoName
+ ".wmv\"");
} else {
String cmd = "sh " + getMplayerBinPath() + "/timelength.sh " + dir.getPath()+ "/" + videoName + ".wmv";
p = Runtime.getRuntime().exec(cmd);
}
InputStream is = p.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line = null;
while ((line = br.readLine()) != null) {
if(line != null){
if(line.startsWith("ID_LENGTH")){
String second = line.split("=")[1].trim();
int pos = 0;
if((pos = second.indexOf(".")) != -1){
// 去除小数点后的数字
return Long.parseLong(second.substring(0, pos));
}else{
return Long.parseLong(second);
}
}
}
}
try {
br.close();
isr.close();
is.close();
} catch (Exception e) { }
return 0;
} /**
* 格式化视频播放时长
* @param time
* @return
*/
public static String formatVideoTimeLength(long time) {
long s = time % 60;
long m = (time / 60) % 60;
long h = time / 3600;
return toTimeString(h) + ":" + toTimeString(m) + ":" + toTimeString(s);
}这个代码可以获取wmv视频文件的时长,你可以照着写,但是得知道wav文件头的格式
import java.io.IOException;import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;public class AudioLength { public static void main(String[] args) throws LineUnavailableException,
UnsupportedAudioFileException, IOException {
File file = new File("d:/test.wav");
Clip clip = AudioSystem.getClip();
AudioInputStream ais = AudioSystem.getAudioInputStream(file);
clip.open(ais);
System.out.println( clip.getMicrosecondLength() / 1000000D + " s" );
}
}