Java调用ffmpeg进行视频转码

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来源:http://blog.chinaunix.net/uid-25885064-id-3396371.html

 

import java.io.*;import java.lang.*;import java.util.*;import java.text.*;import java.net.*;public class MediocreExecJavac {    public void runCmd(String command) {        try {            Runtime rt = Runtime.getRuntime();            Process proc = rt.exec(command);            InputStream stderr = proc.getErrorStream();            InputStreamReader isr = new InputStreamReader(stderr);            BufferedReader br = new BufferedReader(isr);            String line = null;             while ( (line = br.readLine()) != null)                System.out.println(line);            int exitVal = proc.waitFor();            System.out.println("Process exitValue: " + exitVal);        } catch (Throwable t) {            t.printStackTrace();        }    }    public boolean transfer(String infile,String outfile) {        String avitoflv = "ffmpeg -i "+infile+" -ar 22050 -ab 56 -f flv -y -s 320x240 "+outfile;        String flvto3gp = "ffmpeg -i " + infile + " -ar 8000 -ac 1 -acodec amr_nb -vcodec h263 -s 176x144 -r 12 -b 30 -ab 12 " + outfile;        String avito3gp = "ffmpeg -i " + infile + " -ar 8000 -ac 1 -acodec amr_nb -vcodec h263 -s 176x144 -r 12 -b 30 -ab 12 " + outfile;        String avitojpg = "ffmpeg -i " + infile + " -y -f image2 -ss 00:00:10 -t 00:00:01 -s 350x240 " + outfile;        try {            Runtime rt = Runtime.getRuntime();            Process proc = rt.exec(avitoflv);            InputStream stderr = proc.getErrorStream();            InputStreamReader isr = new InputStreamReader(stderr);            BufferedReader br = new BufferedReader(isr);            String line = null;            while ( (line = br.readLine()) != null)                System.out.println(line);            int exitVal = proc.waitFor();            System.out.println("Process exitValue: " + exitVal);        } catch (Throwable t) {            t.printStackTrace();            return false;        }        return true;    }    public static String readFile(String fileName,int id) {        String dataStr = "";        FileInputStream fis = null;        try {            FileReader file = new FileReader(fileName);//建立FileReader对象,并实例化为fr            BufferedReader br=new BufferedReader(file);//建立BufferedReader对象,并实例化为br            String Line=br.readLine();//从文件读取一行字符串            dataStr=Line;            br.close();//关闭BufferedReader对象        } catch(Exception e) {        } finally {            try {                if(fis!=null)                    fis.close();            } catch(Exception e) {}        }        return dataStr;    }    public String readtime(String file) {        String str="/root/Desktop/info.txt";        String timelen = "";        String cmd = "timelen "+file;        runCmd(cmd);        timelen=readFile(str,1);        return timelen;    }    public static void main(String args[]) {        MediocreExecJavac me = new MediocreExecJavac();        String infile = "/root/Desktop/a.mp4";        String outfile = "/root/Desktop/1.flv";        String timelen = me.readtime(infile);        System.out.println("timelen is :" + timelen);        if(me.transfer(infile,outfile)) {            System.out.println("the transfer is ok!");        } else {            System.out.println("the transfer is error!");        }    }}

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