1、创建Java项目
在该项目下创建三个文件夹ffmpeg、input、output分别存放转换器ffmpeg.exe、须转化的视频文件和转化后的视频文件。
ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）。
ffmpeg无法解析的文件格式(wmv9，rm，rmvb等), 可以先用别的工具（mencoder）转换为avi(ffmpeg能解析的)格式.
转化器下载
提取码：ts5g
2、创建class文件
创建包com
在该包下创建class文件ConvertVideo.java
package com;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
public class ConvertVideo {
private static String inputPath = "";
private static String outputPath = "";
private static String ffmpegPath = "";
public static void main(String args[]) throws IOException {
getPath();
if (!checkfile(inputPath)) {
System.out.println(inputPath + " is not file");
return;
}
if (process()) {
System.out.println("ok");
}
}
public static void getPath() {
// 先获取当前项目路径，在获得源文件、目标文件、转换器的路径
File diretory = new File("");
try {
String currPath = diretory.getAbsolutePath();
inputPath = "D:\\input\\1.wmv";
outputPath = "D:\\output\\";
ffmpegPath = "D:\\ffmpeg\\ffmpeg\\";
System.out.println(currPath);
}
catch (Exception e) {
System.out.println("getPath出错");
}
}
public static boolean process() {
int type = checkContentType();
boolean status = false;
System.out.println("直接转成mp4格式");
status = processMp4(inputPath);// 直接转成mp4格式
return status;
}
private static int checkContentType() {
String type = inputPath.substring(inputPath.lastIndexOf(".") + 1, inputPath.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;
}
// 对ffmpeg无法解析的文件格式(wmv9，rm，rmvb等),
// 可以先用别的工具（mencoder）转换为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 static boolean checkfile(String path) {
File file = new File(path);
if (!file.isFile()) {
return false;
}
return true;
}
// 对ffmpeg无法解析的文件格式(wmv9，rm，rmvb等), 可以先用别的工具（mencoder）转换为avi(ffmpeg能解析的)格式.
private static String processAVI(int type) {
List<String> commend = new ArrayList<String>();
commend.add(ffmpegPath + "mencoder");
commend.add(inputPath);
commend.add("-oac");
commend.add("lavc");
commend.add("-lavcopts");
commend.add("acodec=mp3:abitrate=64");
commend.add("-ovc");
commend.add("xvid");
commend.add("-xvidencopts");
commend.add("bitrate=600");
commend.add("-of");
commend.add("mp4");
commend.add("-o");
commend.add(outputPath + "a.AVI");
try {
ProcessBuilder builder = new ProcessBuilder();
Process process = builder.command(commend).redirectErrorStream(true).start();
new PrintStream(process.getInputStream());
new PrintStream(process.getErrorStream());
process.waitFor();
return outputPath + "a.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 static boolean processFlv(String oldfilepath) {
if (!checkfile(inputPath)) {
System.out.println(oldfilepath + " is not file");
return false;
}
List<String> command = new ArrayList<String>();
command.add(ffmpegPath + "ffmpeg");
command.add("-i");
command.add(oldfilepath);
command.add("-ab");
command.add("56");
command.add("-ar");
command.add("22050");
command.add("-qscale");
command.add("8");
command.add("-r");
command.add("15");
command.add("-s");
command.add("600x500");
command.add(outputPath + "a.flv");
try {
// 方案1
// Process videoProcess = Runtime.getRuntime().exec(ffmpegPath + "ffmpeg -i " + oldfilepath
// + " -ab 56 -ar 22050 -qscale 8 -r 15 -s 600x500 "
// + outputPath + "a.flv");
// 方案2
Process videoProcess = new ProcessBuilder(command).redirectErrorStream(true).start();
new PrintStream(videoProcess.getErrorStream()).start();
new PrintStream(videoProcess.getInputStream()).start();
videoProcess.waitFor();
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
private static boolean processMp4(String oldfilepath) {
if (!checkfile(inputPath)) {
System.out.println(oldfilepath + " is not file");
return false;
}
List<String> command = new ArrayList<String>();
command.add(ffmpegPath + "ffmpeg");
command.add("-i");
command.add(oldfilepath);
command.add("-c:v");
command.add("libx264");
command.add("-mbd");
command.add("0");
command.add("-c:a");
command.add("aac");
command.add("-strict");
command.add("-2");
command.add("-pix_fmt");
command.add("yuv420p");
command.add("-movflags");
command.add("faststart");
command.add(outputPath + "a.mp4"); //目标文件命名
try {
// 方案1
// Process videoProcess = Runtime.getRuntime().exec(ffmpegPath + "ffmpeg -i " + oldfilepath
// + " -ab 56 -ar 22050 -qscale 8 -r 15 -s 600x500 "
// + outputPath + "a.flv");
// 方案2
Process videoProcess = new ProcessBuilder(command).redirectErrorStream(true).start();
new PrintStream(videoProcess.getErrorStream()).start();
new PrintStream(videoProcess.getInputStream()).start();
videoProcess.waitFor();
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
}
class PrintStream extends Thread
{
java.io.InputStream __is = null;
public PrintStream(java.io.InputStream is)
{
__is = is;
}
public void run()
{
try
{
while(this != null)
{
int _ch = __is.read();
if(_ch != -1)
System.out.print((char)_ch);
else break;
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
3、转化成功
