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詳解java調(diào)用ffmpeg轉(zhuǎn)換視頻格式為flv

注意：下面的程序是在Linux下運(yùn)行的，如果在windows下rmvb轉(zhuǎn)換成avi會(huì)出現(xiàn)問題，想成功需要下載下個(gè)drv43260.dll東西放到C:WindowsSystem32下面

這幾天在寫一個(gè)視頻管理系統(tǒng)，遇到一個(gè)很大的問題就是如果把不同格式轉(zhuǎn)換為flv，格式！經(jīng)過(guò)網(wǎng)上的一番搜索，自己在總結(jié)，整理，整理，終于整出來(lái)了！實(shí)現(xiàn)了視頻進(jìn)行轉(zhuǎn)換的同時(shí)還能夠進(jìn)行視頻截圖和刪除原文件的功能！

格式轉(zhuǎn)換主要原理就是先用java調(diào)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(diào)用mencoder先把格式轉(zhuǎn)換為avi再進(jìn)行轉(zhuǎn)換為flv!

我主要寫3個(gè)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(zhuǎn)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(zhuǎn)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(kuò)展名
private Stringfilename; // 包括擴(kuò)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(zhuǎn)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(zhuǎn)文件("+PATH+")--------------------------");
 if (process()) {
 Date dt2 = new Date();
 Conver.OutShowLog.append("轉(zhuǎn)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(zhuǎn)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(zhuǎn)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(duì)ffmpeg無(wú)法解析的文件格式(wmv9，rm，rmvb等),
 // 可以先用別的工具（mencoder）轉(zhuǎn)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(duì)ffmpeg無(wú)法解析的文件格式(wmv9，rm，rmvb等),可以先用別的工具（mencoder）轉(zhuǎn)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 = -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 = 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(shí)" : "" + hour + "小時(shí)";
 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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詳解java調(diào)用ffmpeg轉(zhuǎn)換視頻格式為flv