使用Java调用linux命令ffmpeg

http://lenj.blog.163.com/blog/static/127420388201411112545226/

使用Java调用linux命令ffmpeg

2014-12-11 14:09:11| 分类： J2EE|举报|字号 订阅





下载LOFTER客户端

//win下获取ffmpeg路径
String path = ServletActionContext.getServletContext().getRealPath("/WEB-INF/classes/ffmpeg.exe");
// linux路径
String path="/usr/local/bin/ffmpeg";

String raw2flvCmd = "/usr/local/ffmpeg/bin/ffmpeg -i \"某视频文件下载URL\" -f flv /usr/userfile/ffmpeg/tempfile/1.flv";  
Runtime.getRuntime().exec(new String[]{"sh","-c",raw2flvCmd}); 

package com.nvvideo.util.cmd;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.List;

/**
* CmdExecuter
* <p>Title: 命令执行器</p>
* <p>Description: 封装对操作系统命令行发送指令相关操作</p>
*/
public class CmdExecuter {

/**
* 执行指令
* @param cmd 执行指令
* @param getter 指令返回处理接口，若为null则不处理输出
*/
static public void exec( List<String> cmd, IStringGetter getter ){
try {
ProcessBuilder builder = new ProcessBuilder();
builder.command(cmd);
builder.redirectErrorStream(true);
Process proc = builder.start();
BufferedReader stdout = new BufferedReader(
new InputStreamReader(proc.getInputStream()));
String line;
while ((line = stdout.readLine()) != null) {
if( getter != null )
getter.dealString(line);
}
proc.waitFor();
stdout.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

/**
* IStringGetter
* <p>Title: 字符串接收者接口</p>
* <p>Description: </p>
*/
public interface IStringGetter {
/**
* 处理字符串
* @param str
*/
public void dealString( String str );
}

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.nvvideo.util.cmd.CmdExecuter;
import com.nvvideo.util.cmd.IStringGetter;

public class FFMpegUtil implements IStringGetter {

private long runtime = 0;
private String ffmpegUri;// ffmpeg地址
private String originFileUri; // 视频源文件地址

private enum FFMpegUtilStatus {
Empty, CheckingFile, GettingRuntime
};

private FFMpegUtilStatus status = FFMpegUtilStatus.Empty;

/**
* 构造函数
*
* @param ffmpegUri
* ffmpeg的全路径 如e:/ffmpeg/ffmpeg.exe 或 /usr/local/bin/ffmpeg
* @param originFileUri
* 所操作视频文件的全路径 如e:/upload/temp/test.wmv
*/
public FFMpegUtil(String ffmpegUri, String originFileUri) {
this.ffmpegUri = ffmpegUri;
this.originFileUri = originFileUri;
}

/**
* 获取视频时长
*
* @return
*/
public long getRuntime() {
runtime = 0;
status = FFMpegUtilStatus.GettingRuntime;
System.out.println(status);
cmd.clear();
cmd.add(ffmpegUri);
cmd.add("-i");
cmd.add(originFileUri);
CmdExecuter.exec(cmd, this);
return runtime;
}

/**
* 检测文件是否是支持的格式 将检测视频文件本身，而不是扩展名
*
* @return
*/
public boolean isSupported() {
isSupported = false;
status = FFMpegUtilStatus.CheckingFile;
cmd.clear();
cmd.add(ffmpegUri);
cmd.add("-i");
cmd.add(originFileUri);
cmd.add("Duration: (.*?), start: (.*?), bitrate: (\\d*) kb\\/s");
CmdExecuter.exec(cmd, this);
return isSupported;
}

private boolean isSupported;

/**
* 生成视频截图
*
* @param imageSavePath
* 截图文件保存全路径
* @param screenSize
* 截图大小 如640x480
*/
public void makeScreenCut(String imageSavePath, String screenSize) {
cmd.clear();
cmd.add(ffmpegUri);
cmd.add("-i");
cmd.add(originFileUri);
cmd.add("-y");
cmd.add("-f");
cmd.add("image2");
cmd.add("-ss");
cmd.add("2");
cmd.add("-t");
cmd.add("0.001");
cmd.add("-s");
cmd.add(screenSize);
cmd.add(imageSavePath);
CmdExecuter.exec(cmd, this);
}

private List<String> cmd = new ArrayList<String>();

public void dealString(String str) {
System.out.println("==dealString==="+str);

switch (status) {
case Empty:
break;
case CheckingFile: {
if (-1 != str.indexOf("Metadata:"))
this.isSupported = true;
break;
}
case GettingRuntime: {
String strs="";

if(str.contains("Duration")){
System.out.println(str.substring(str.indexOf(":")+1,str.indexOf(",")));
strs=str.substring(str.indexOf(":")+1,str.indexOf(","));
if(strs!=null){
runtime = TimeUtils.Test(strs);
}
}
// Matcher m = Pattern.compile("Duration").matcher(str);
// System.out.println("====msgm======="+m);
// while (m.find()) {
// String msg = m.group();
// msg = msg.replace("Duration: ","");
// System.out.println("====msg======="+msg);
//runtime = TimeUtils.Test(strs);
// }
break;
}
}// switch
}
}

public class TimeUtils {

public static long Test(String str){
long t=Integer.parseInt(str.substring(1,3))*60*60+Integer.parseInt(str.substring(4,6))*60+Integer.parseInt(str.substring(7,9));
System.out.println(t);
return t;
}

}

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