package com.sino.test; 
 
import java.io.BufferedReader; 
import java.io.File; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.util.ArrayList; 
import java.util.List; 
 
/** 
 * java實現(xiàn)視頻格式的轉(zhuǎn)化 
 * @author liuyazhuang 
 * 
 */ 
public class ChangeVideo { 
  public static void main(String[] args) { 
    ChangeVideo.convert("d:\\myeclipse\\aa.avi", "d:\\myeclipse\\bb.mp4"); 
  } 
 
  /** 
   * @param inputFile:需要轉(zhuǎn)換的視頻 
   * @param outputFile：轉(zhuǎn)換后的視頻w 
   * @return 
   */ 
  public static boolean convert(String inputFile, String outputFile) { 
    if (!checkfile(inputFile)) { 
      System.out.println(inputFile + " is nokt file"); 
      return false; 
    } 
    if (process(inputFile, outputFile)) { 
      System.out.println("ok"); 
      return true; 
    } 
    return false; 
  } 
 
  // 檢查文件是否存在 
  private static boolean checkfile(String path) { 
    File file = new File(path); 
    if (!file.isFile()) { 
      return false; 
    } 
    return true; 
  } 
 
  /** 
   * @param inputFile 
   * @param outputFile 
   * @return 
   * 轉(zhuǎn)換視頻文件 
   */ 
  private static boolean process(String inputFile, String outputFile) { 
    int type = checkContentType(inputFile); 
    boolean status = false; 
    if (type == 0) { 
      status = processFLV(inputFile, outputFile);// 直接將文件轉(zhuǎn)為flv文件 
    } else if (type == 1) { 
      String avifilepath = processAVI(type, inputFile); 
      if (avifilepath == null) 
        return false;// avi文件沒有得到 
      status = processFLV(avifilepath, outputFile);// 將avi轉(zhuǎn)為flv 
    } 
    return status; 
  } 
 
  private static int checkContentType(String inputFile) { 
    String type = inputFile.substring(inputFile.lastIndexOf(".") + 1, 
        inputFile.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ffmpeg無法解析的文件格式(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; 
  } 
  // ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等）直接轉(zhuǎn)換為目標視頻 
  private static boolean processFLV(String inputFile, String outputFile) { 
    if (!checkfile(inputFile)) { 
      System.out.println(inputFile + " is not file"); 
      return false; 
    } 
    List<String> commend = new ArrayList<String>(); 
     
    commend.add(Constants.ffmpegPath); 
    commend.add("-i"); 
    commend.add(inputFile); 
    commend.add("-ab"); 
    commend.add("128"); 
    commend.add("-acodec"); 
    commend.add("libmp3lame"); 
    commend.add("-ac"); 
    commend.add("1"); 
    commend.add("-ar"); 
    commend.add("22050"); 
    commend.add("-r"); 
    commend.add("29.97"); 
    //高品質(zhì)  
    commend.add("-qscale"); 
    commend.add("6"); 
    //低品質(zhì) 
//   commend.add("-b"); 
//   commend.add("512"); 
    commend.add("-y"); 
     
    commend.add(outputFile); 
    StringBuffer test = new StringBuffer(); 
    for (int i = 0; i < commend.size(); i++) { 
      test.append(commend.get(i) + " "); 
    } 
 
    System.out.println(test); 
 
    try { 
      ProcessBuilder builder = new ProcessBuilder(); 
      builder.command(commend); 
      builder.start(); 
      return true; 
    } catch (Exception e) { 
      e.printStackTrace(); 
      return false; 
    } 
  } 
  // 對ffmpeg無法解析的文件格式(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 static String processAVI(int type, String inputFile) { 
    File file = new File(Constants.avifilepath); 
    if (file.exists()) 
      file.delete(); 
    List<String> commend = new ArrayList<String>(); 
    commend.add(Constants.mencoderPath); 
    commend.add(inputFile); 
    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(Constants.avifilepath); 
    StringBuffer test = new StringBuffer(); 
    for (int i = 0; i < commend.size(); i++) { 
      test.append(commend.get(i) + " "); 
    } 
 
    System.out.println(test); 
    try { 
      ProcessBuilder builder = new ProcessBuilder(); 
      builder.command(commend); 
      Process p = builder.start(); 
 
      final InputStream is1 = p.getInputStream(); 
      final InputStream is2 = p.getErrorStream(); 
      new Thread() { 
        public void run() { 
          BufferedReader br = new BufferedReader( 
              new InputStreamReader(is1)); 
          try { 
            String lineB = null; 
            while ((lineB = br.readLine()) != null) { 
              if (lineB != null) 
                System.out.println(lineB); 
            } 
          } catch (IOException e) { 
            e.printStackTrace(); 
          } 
        } 
      }.start(); 
      new Thread() { 
        public void run() { 
          BufferedReader br2 = new BufferedReader( 
              new InputStreamReader(is2)); 
          try { 
            String lineC = null; 
            while ((lineC = br2.readLine()) != null) { 
              if (lineC != null) 
                System.out.println(lineC); 
            } 
          } catch (IOException e) { 
            e.printStackTrace(); 
          } 
        } 
      }.start(); 
 
      // 等Mencoder進程轉(zhuǎn)換結(jié)束，再調(diào)用ffmepg進程 
      p.waitFor(); 
      System.out.println("who cares"); 
      return Constants.avifilepath; 
    } catch (Exception e) { 
      System.err.println(e); 
      return null; 
    } 
  } 
} 

package com.sino.test; 
 
/** 
 * 常量類,主要設(shè)置可執(zhí)行程序和動態(tài)鏈接庫以及轉(zhuǎn)化過程中生成的臨時視頻文件的位置 
 * @author liuyazhuang 
 * 
 */ 
public class Constants { 
  //ffmpeg存放的路徑 
  public static final String ffmpegPath = "d:\\myeclipse\\ffmpeg.exe"; 
  //mencoder存放的路徑 
  public static final String mencoderPath = "d:\\myeclipse\\mencoder.exe"; 
  //通過mencoder轉(zhuǎn)換成的avi存放路徑 
  public static final String avifilepath = "d:\\myeclipse\\temp.avi"; 
}