詳解java調用ffmpeg轉換視頻格式為flv

詳解Java調用ffmpeg轉換視頻格式為flv

註意：下面的程序是在linux下運行的，如果在Windows下rmvb轉換成avi會出現問題，想成功需要下載下個drv43260.dll東西放到C:Windowssystem32下面

這幾天在寫一個視頻管理系統，遇到一個很大的問題就是如果把不同格式轉換為flv，格式！經過網上的一番搜索，自己在總結，整理，整理，終於整出來了！實現了視頻進行轉換的同時還能夠進行視頻截圖和刪除原文件的功能！

格式轉換主要原理就是先用java調用ffmpeg的exe文件！

但是有些格式是ffmpeg不能處理的比如rmvb，這樣的可以先調用mencoder先把格式轉換為avi再進行轉換為flv!

我主要寫3個類：分別為Conver.java 

   ConverBegin.Java  ConverVideo.java

Conver.java   代碼如下：

package org.Conver;



import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

@SuppressWarnings("serial")
public class Conver extends JFrame{
public static JTextArea OutShowLog;
public Conver() {
 setTitle("FLV轉換");
 setSize(500, 400);
 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 OutShowLog = new JTextArea();
 JScrollPane OutPane = newJScrollPane(OutShowLog);
 add(OutPane,BorderLayout.CENTER);
 setVisible(true);
}
public static void main(String args[]) {
 new Conver();
 ConverBegin cb = new ConverBegin();
 cb.start();
}
}

ConverBegin.java  代碼如下：

package org.Conver;



import java.io.File;

public class ConverBegin extends Thread{
String[] ff;
public void run(){
 while (true) {
 String folderpath ="other/";
 //String path = null;
 File f = newFile(folderpath);
  if (f.isDirectory()) {
 ff = f.list();
 int i =0;
 while (i< ff.length) {
 new ConverVideo(folderpath+ff[i]).beginConver();
 i++;
 }
 Conver.OutShowLog.append("---------------總共轉換了"+ff.length+"-----------視頻------------");
 ff =null;
 }
  f = null;
 
  try {
 Thread.sleep(10000);
 } catch (InterruptedExceptione) {
 //如果失敗重啟線程
 this.start();
 }
 }
 

}
}

ConverBegin.java 代碼如下

package org.Conver;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.List;



public class ConverVideo {
private Date dt;
private long begintime;
private String PATH;
private String filerealname; // 文件名 不包括擴展名
private Stringfilename; // 包括擴展名
private String videofolder = "other/"; //別的格式視頻的目錄
private String flvfolder ="flv/";  //flv視頻的目錄
 privateStringffmpegpath="ffmpeg/ffmpeg.exe"; //ffmpeg.exe的目錄
 privateStringmencoderpath="ffmpeg/mencoder"; //mencoder的目錄
 privateStringvideoRealPath="flv/"; //截圖的視頻目錄;
 privateString imageRealPath ="img/"; //截圖的存放目錄
 //privateString batrealpath="ffmpeg/ffmpeg.bat"; //bat目錄
 publicConverVideo(){}
public ConverVideo(String path) {
 PATH = path;
}
 publicString getPATH() {
 return PATH;
}

public void setPATH(String path) {
 PATH = path;
}
public boolean beginConver(){
 File fi = new File(PATH);
 filename = fi.getName();
 filerealname = filename.substring(0,filename.lastIndexOf("."))
 .toLowerCase();
 Conver.OutShowLog.append("----接收到文件("+PATH+")需要轉換--------------------------");
 if (!checkfile(PATH)) {
 Conver.OutShowLog.append(PATH+ "文件不存在"+" ");
 return false;
 }
 dt = new Date();
 begintime = dt.getTime();
 Conver.OutShowLog.append("----開始轉文件("+PATH+")--------------------------");
 if (process()) {
 Date dt2 = new Date();
 Conver.OutShowLog.append("轉換成功");
 long endtime =dt2.getTime();
 long timecha = (endtime -begintime);
 String totaltime =sumTime(timecha);
 Conver.OutShowLog.append("共用了:" + totaltime+" ");
  if(processImg()) {
  Conver.OutShowLog.append("截圖成功了 ");
  }else {
  Conver.OutShowLog.append("截圖不成功了 ");
 }
  PATH = null;
  return true;
 }else {
  PATH = null;
 return false;
 }
}
public boolean processImg() {
//  System.out.println(newfilename + "->" +newimg);
  List commend = new java.util.ArrayList();
  commend.add(ffmpegpath);
  commend.add("-i");
  commend.add(videoRealPath+filerealname+".flv");
  commend.add("-y");
  commend.add("-f");
  commend.add("image2");
  commend.add("-ss");
  commend.add("38");
  commend.add("-t");
  commend.add("0.001");
  commend.add("-s");
  commend.add("320x240");
  commend.add(imageRealPath+filerealname+".jpg");
 try {
  ProcessBuilder builder = new ProcessBuilder();
  builder.command(commend);
  builder.start();
  return true;
  } catch (Exception e) {
  e.printStackTrace();
  return false;
  }
 }
private boolean process() {
 int type = checkContentType();
 boolean status = false;
 if (type == 0) {

 // status =processFLV(PATH);// 直接將文件轉為flv文件
 status =processFLV(PATH);
 } else if (type == 1) {
 String avifilepath =processAVI(type);
 if (avifilepath == null)
 returnfalse;
 // avi文件沒有得到
 else {
 System.out.println("kaishizhuang");
 status =processFLV(avifilepath);// 將avi轉為flv
 }
 }
 return status;
}

private int checkContentType() {
 String type =PATH.substring(PATH.lastIndexOf(".") + 1, PATH.length())
 .toLowerCase();
 //ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）
 if (type.equals("avi")) {
 return 0;
 } else if (type.equals("mpg")) {
 return 0;
 } else if (type.equals("wmv")) {
 return 0;
 } else if (type.equals("3gp")) {
 return 0;
 } else if (type.equals("mov")) {
 return 0;
 } else if (type.equals("mp4")) {
 return 0;
 } else if (type.equals("asf")) {
 return 0;
 } else if (type.equals("asx")) {
 return 0;
 } else if (type.equals("flv")) {
 return 0;
 }
 // 對ffmpeg無法解析的文件格式(wmv9，rm，rmvb等),
 // 可以先用別的工具（mencoder）轉換為avi(ffmpeg能解析的)格式.
 else if (type.equals("wmv9")) {
 return 1;
 } else if (type.equals("rm")) {
 return 1;
 } else if (type.equals("rmvb")) {
 return 1;
 }
 return 9;
}

private boolean checkfile(String path) {
 File file = new File(path);
 if (!file.isFile()) {
 return false;
 }else {
 return true;
 }
}

// 對ffmpeg無法解析的文件格式(wmv9，rm，rmvb等),可以先用別的工具（mencoder）轉換為avi(ffmpeg能解析的)格式.
private String processAVI(int type) {
 List commend = new java.util.ArrayList();
 
 commend.add(mencoderpath);
 commend.add(PATH);
 commend.add("-oac");
 commend.add("mp3lame");
 commend.add("-lameopts");
 commend.add("preset=64");
 commend.add("-ovc");
 commend.add("xvid");
 commend.add("-xvidencopts");
 commend.add("bitrate=600");
 commend.add("-of");
 commend.add("avi");
 commend.add("-o");
 commend.add(videofolder + filerealname +".avi");
 // 命令類型：mencoder 1.rmvb -oac mp3lame -lameoptspreset=64 -ovc xvid
 // -xvidencopts bitrate=600 -of avi -ormvb.avi
 try {
 ProcessBuilder builder = newProcessBuilder();
 builder.command(commend);
 Process p =builder.start();

 doWaitFor(p);
 return videofolder +filerealname + ".avi";
 } catch (Exception e) {
 e.printStackTrace();
 return null;
 }
}

// ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）
private boolean processFLV(String oldfilepath) {

 if (!checkfile(PATH)) {
 System.out.println(oldfilepath+ " is not file");
 return false;
 }

 List commend = new java.util.ArrayList();
 commend.add(ffmpegpath);
 commend.add("-i");
 commend.add(oldfilepath);
 commend.add("-ab");
 commend.add("64");
 commend.add("-acodec");
 commend.add("mp3");
 commend.add("-ac");
 commend.add("2");
 commend.add("-ar");
 commend.add("22050");
 commend.add("-b");
 commend.add("230");
 commend.add("-r");
 commend.add("24");
 commend.add("-y");
 commend.add(flvfolder + filerealname +".flv");
 try {
 ProcessBuilder builder = newProcessBuilder();
 String cmd =commend.toString();
 builder.command(commend);
 //builder.redirectErrorStream(true);
 Process p =builder.start();
 doWaitFor(p);
 p.destroy();
 deleteFile(oldfilepath);
 return true;
 } catch (Exception e) {
 e.printStackTrace();
 return false;
 }
}

public int doWaitFor(Process p)

{
 InputStream in = null;
 InputStream err=null;
 int exitValue = http://www.jb51.net/article/-1; // returned to caller when pis finished
 try {
 System.out.println("comeing");
 in = p.getInputStream();
 err =p.getErrorStream();
 boolean finished = false; //Set to true when p is finished

 while (!finished) {
 try {
 while (in.available() > 0) {
  // Print the output of our system call
  Character c = new Character((char) in.read());
  System.out.print(c);
 }
 while (err.available() > 0) {
  // Print the output of our system call
  Character c = new Character((char) err.read());
  System.out.print(c);
 }

 // Ask the process for its exitValue. If the process
 // is not finished, an IllegalThreadStateException
 // is thrown. If it is finished, we fall through and
 // the variable finished is set to true.
 exitValue = http://www.jb51.net/article/p.exitValue();
 finished = true;

 } catch(IllegalThreadStateException e) {
 // Process is not finished yet;
 // Sleep a little to save on CPU cycles
 Thread.currentThread().sleep(500);
 }
 }
 } catch (Exception e) {
 // unexpected exception! printit out for debugging...
 System.err.println("doWaitFor();: unexpected exception - "
 + e.getmessage());
 } finally {
 try {
 if(in!=null)
 {
 in.close();
 }
 
 } catch (IOException e){
 System.out.println(e.getMessage());
 }
 if(err!=null)
 {
 try {
 err.close();
 } catch(IOException e) {
 System.out.println(e.getMessage());
 }
 }
 }
 // return completion status to caller
 return exitValue;
}

public void deleteFile(String filepath) {
 File file = new File(filepath);
 if (PATH.equals(filepath)) {
 if (file.delete()) {
 System.out.println("文件" + filepath + "已刪除");
 }
 } else {
 if (file.delete()) {
 System.out.println("文件" + filepath + "已刪除 ");
 }
 File filedelete2 = newFile(PATH);
 if (filedelete2.delete()){
 System.out.println("文件" + PATH + "已刪除");
 }
 }
}

public String sumTime(long ms) {
 int ss = 1000;
 long mi = ss * 60;
 long hh = mi * 60;
 long dd = hh * 24;

 long day = ms / dd;
 long hour = (ms - day * dd) / hh;
 long minute = (ms - day * dd - hour * hh) /mi;
 long second = (ms - day * dd - hour * hh -minute * mi) / ss;
 long milliSecond = ms - day * dd - hour * hh -minute * mi - second
 * ss;

 String strDay = day < 10 "0" +day + "天" : "" + day + "天";
 String strHour = hour < 10 "0"+ hour + "小時" : "" + hour + "小時";
 String strMinute = minute < 10 "0" + minute + "分" : "" + minute + "分";
 String strSecond = second < 10 "0" + second + "秒" : "" + second + "秒";
 String strMilliSecond = milliSecond< 10 "0" + milliSecond : ""
 +milliSecond;
 strMilliSecond = milliSecond <100 "0" + strMilliSecond + "毫秒" : ""
 +strMilliSecond + " 毫秒";
 return strDay + " " + strHour + ":" + strMinute+ ":" + strSecond + " "
 +strMilliSecond;

}
}

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