Java使用ffmpeg和mencoder实现视频转码

public class Contants { public static final String ffmpegpath = "D://DevTools//ffmpeg//bin//ffmpeg.exe";//ffmpeg的安装位置 public static final String mencoderpath = "D://DevTools//mencoder//"; // mencoder的目录  public static final String videofolder = "D://tools//video//"; // 需要被转换格式的视频目录 public static final String targetfolder = "D://tools//target//"; // 转换后视频的目录  public static final String videoRealPath = "D://tools//target//"; // 需要被截图的视频目录; public static final String imageRealPath = "D://tools//imgs//"; // 截图的存放目录}

import java.io.File;import java.io.IOException;import java.io.InputStream;import java.util.Date;import java.util.List; import com.wdy.common.Contants; public class ConverVideoUtils { private Date dt; private long begintime; private String sourceVideoPath;//源视频路径 private String filerealname; // 文件名 不包括扩展名 private String filename; // 包括扩展名 private String videofolder = Contants.videofolder; // 别的格式视频的目录 private String targetfolder = Contants.targetfolder; // flv视频的目录 private String ffmpegpath = Contants.ffmpegpath; // ffmpeg.exe的目录 private String mencoderpath = Contants.mencoderpath; // mencoder的目录 private String imageRealPath = Contants.imageRealPath; // 截图的存放目录  public ConverVideoUtils() { }  public ConverVideoUtils(String path) { sourceVideoPath = path; }  public String getPATH() { return sourceVideoPath; }  public void setPATH(String path) { sourceVideoPath = path; }  /** * 转换视频格式 * @param String targetExtension 目标视频扩展名 .xxx  * @param isDelSourseFile 转换完成后是否删除源文件 * @return */ public boolean beginConver(String targetExtension, boolean isDelSourseFile) { File fi = new File(sourceVideoPath); filename = fi.getName(); filerealname = filename.substring(0, filename.lastIndexOf(".")).toLowerCase(); System.out.println("----接收到文件(" + sourceVideoPath + ")需要转换-------------------------- "); if (!checkfile(sourceVideoPath)) { System.out.println(sourceVideoPath + "文件不存在" + " "); return false; } dt = new Date(); begintime = dt.getTime(); System.out.println("----开始转文件(" + sourceVideoPath + ")-------------------------- "); if (process(targetExtension,isDelSourseFile)) { Date dt2 = new Date(); System.out.println("转换成功 "); long endtime = dt2.getTime(); long timecha = (endtime - begintime); String totaltime = sumTime(timecha); System.out.println("转换视频格式共用了:" + totaltime + " "); if (processImg(sourceVideoPath)) { System.out.println("截图成功了！ "); } else { System.out.println("截图失败了！ "); } if (isDelSourseFile) { deleteFile(sourceVideoPath); } sourceVideoPath = null; return true; } else { sourceVideoPath = null; return false; } }  /** * 对视频进行截图 * @param sourceVideoPath 需要被截图的视频路径（包含文件名和扩展名） * @return */ public boolean processImg(String sourceVideoPath) { if (!checkfile(sourceVideoPath)) { System.out.println(sourceVideoPath + " is not file"); return false; } File fi = new File(sourceVideoPath); filename = fi.getName(); filerealname = filename.substring(0, filename.lastIndexOf(".")).toLowerCase(); List<String> commend = new java.util.ArrayList<String>(); //第一帧： 00:00:01 //time ffmpeg -ss 00:00:01 -i test1.flv -f image2 -y test1.jpg commend.add(ffmpegpath);// commend.add("-i");// commend.add(videoRealPath + filerealname + ".flv");// commend.add("-y");// commend.add("-f");// commend.add("image2");// commend.add("-ss");// commend.add("38");// commend.add("-t");// commend.add("0.001");// commend.add("-s");// commend.add("320x240"); commend.add("-ss"); commend.add("00:00:01"); commend.add("-i"); commend.add(sourceVideoPath); commend.add("-f"); commend.add("image2"); commend.add("-y"); commend.add(imageRealPath + filerealname + ".jpg"); try { ProcessBuilder builder = new ProcessBuilder(); builder.command(commend); builder.start(); return true; } catch (Exception e) { e.printStackTrace(); return false; } }  /** * 实际转换视频格式的方法 * @param targetExtension 目标视频扩展名 * @param isDelSourseFile 转换完成后是否删除源文件 * @return */ private boolean process(String targetExtension, boolean isDelSourseFile) { int type = checkContentType(); boolean status = false; if (type == 0) { //如果type为0用ffmpeg直接转换 status = processVideoFormat(sourceVideoPath,targetExtension, isDelSourseFile); } else if (type == 1) { //如果type为1，将其他文件先转换为avi，然后在用ffmpeg转换为指定格式 String avifilepath = processAVI(type); if (avifilepath == null){ // avi文件没有得到 return false; }else { System.out.println("开始转换:"); status = processVideoFormat(avifilepath,targetExtension, isDelSourseFile); } } return status; }  /** * 检查文件类型 * @return */ private int checkContentType() { String type = sourceVideoPath.substring(sourceVideoPath.lastIndexOf(".") + 1, sourceVideoPath.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; }  /** * 检查文件是否存在 * @param path * @return */ private boolean checkfile(String path) { File file = new File(path); if (!file.isFile()) { return false; } else { 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. * @param type * @return */ private String processAVI(int type) { List<String> commend = new java.util.ArrayList<String>(); commend.add(mencoderpath); commend.add(sourceVideoPath); 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(videofolder + filerealname + ".avi"); // 命令类型：mencoder 1.rmvb -oac mp3lame -lameopts preset=64 -ovc xvid // -xvidencopts bitrate=600 -of avi -o rmvb.avi try { ProcessBuilder builder = new ProcessBuilder(); builder.command(commend); Process p = builder.start(); doWaitFor(p); return videofolder + filerealname + ".avi"; } catch (Exception e) { e.printStackTrace(); return null; } }  /** * 转换为指定格式 * ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等） * @param oldfilepath * @param targetExtension 目标格式扩展名 .xxx * @param isDelSourseFile 转换完成后是否删除源文件 * @return */ private boolean processVideoFormat(String oldfilepath, String targetExtension, boolean isDelSourceFile) { if (!checkfile(sourceVideoPath)) { System.out.println(oldfilepath + " is not file"); return false; } //ffmpeg -i FILE_NAME.flv -ar 22050 NEW_FILE_NAME.mp4 List<String> commend = new java.util.ArrayList<>(); commend.add(ffmpegpath); commend.add("-i"); commend.add(oldfilepath); commend.add("-ar"); commend.add("22050"); commend.add(targetfolder + filerealname + targetExtension); try { ProcessBuilder builder = new ProcessBuilder(); String cmd = commend.toString(); builder.command(commend); Process p = builder.start(); doWaitFor(p); p.destroy(); //转换完成后删除源文件// if (isDelSourceFile) {// deleteFile(sourceVideoPath);// } return true; } catch (Exception e) { e.printStackTrace(); return false; } }  /** * ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等） * @param oldfilepath * @return */ private boolean processFLV(String oldfilepath) { if (!checkfile(sourceVideoPath)) { System.out.println(oldfilepath + " is not file"); return false; } List<String> commend = new java.util.ArrayList<>(); commend.add(ffmpegpath); commend.add("-i"); commend.add(oldfilepath); commend.add("-ab"); commend.add("64"); commend.add("-acodec"); commend.add("mp3"); commend.add("-ac"); commend.add("2"); commend.add("-ar"); commend.add("22050"); commend.add("-b"); commend.add("230"); commend.add("-r"); commend.add("24"); commend.add("-y"); commend.add(targetfolder + filerealname + ".flv"); try { ProcessBuilder builder = new ProcessBuilder(); String cmd = commend.toString(); builder.command(commend); Process p = builder.start(); doWaitFor(p); p.destroy(); deleteFile(oldfilepath); return true; } catch (Exception e) { e.printStackTrace(); return false; } }  public int doWaitFor(Process p) { InputStream in = null; InputStream err = null; int exitValue = -1; // returned to caller when p is finished try { System.out.println("comeing"); in = p.getInputStream(); err = p.getErrorStream(); boolean finished = false; // Set to true when p is finished  while (!finished) { try {  while (in.available() > 0) {  Character c = new Character((char) in.read());  System.out.print(c);  }  while (err.available() > 0) {  Character c = new Character((char) err.read());  System.out.print(c);  }   exitValue = p.exitValue();  finished = true;  } catch (IllegalThreadStateException e) {  Thread.currentThread().sleep(500); } } } catch (Exception e) { System.err.println("doWaitFor();: unexpected exception - " + e.getMessage()); } finally { try { if (in != null) {  in.close(); }  } catch (IOException e) { System.out.println(e.getMessage()); } if (err != null) { try {  err.close(); } catch (IOException e) {  System.out.println(e.getMessage()); } } } return exitValue; }

public class ConverVideoTest { public void run() {  try {   // 转换并截图   String filePath = "C://Users//wangdy//Desktop//pics//05.尚硅谷_SVN_启动服务器.wmv";   ConverVideoUtils cv = new ConverVideoUtils(filePath);   String targetExtension = ".mp4";   boolean isDelSourseFile = true;   boolean beginConver = cv.beginConver(targetExtension,isDelSourseFile);   System.out.println(beginConver);  } catch (Exception e) {   e.printStackTrace();  } }  public static void main(String args[]) {  ConverVideoTest c = new ConverVideoTest();  c.run(); }}