Java-call-linux-ffmpeg.zip_ffmpeg_ffmpeg java linux_java ffmpeg_

import java.io.*; import java.lang.*; import java.util.*; import java.text.*; import java.net.*; public class MediocreExecJavac { //运行命令 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; System.out.println("<ERROR>"); while ( (line = br.readLine()) != null) System.out.println(line); System.out.println("</ERROR>"); int exitVal = proc.waitFor(); System.out.println("Process exitValue: " + exitVal); } catch (Throwable t) { t.printStackTrace(); } } //视频转码，infile输入文件(包括完整路径)，outfile输出文件 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; //avi -> jpg 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; System.out.println("<ERROR>"); while ( (line = br.readLine()) != null) System.out.println(line); System.out.println("</ERROR>"); int exitVal = proc.waitFor(); System.out.println("Process exitValue: " + exitVal); } catch (Throwable t) { t.printStackTrace(); return false; } return true; } //读取文件,fileName输入文件，id行数 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 int i=1; String Line=br.readLine();//从文件读取一行字符串 //System.out.println("Line1="+Line+"="+Line); //判断读取到的字符串是否不为空 //while(Line!=null){ //System.out.println(Line + "<br>");//输出从文件中读取的数据 //if(i==line){dataStr=Line;break;}else{i=i+1;} //Line=br.readLine();//从文件中继续读取一行数据 //} dataStr=Line; br.close();//关闭BufferedReader对象 } catch(Exception e){ }finally{ try { if(fis!=null) fis.close(); }catch(Exception e){} } return dataStr; } //读时长信息 public String readtime(String file) { String str="/opt/cgogo/test/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 = "/opt/cgogo/test/02.avi"; String outfile = "01.flv"; //时长 String timelen = me.readtime(infile); System.out.println("02.avi timelen is :" + timelen); //转码 if(me.transfer(infile,outfile)){ System.out.println("the transfer is ok!"); }else{ System.out.println("the transfer is error!"); } } }