예제 #1
0
    // The input video files are split into chunks of 64MB here...
    public void map(Object key, Text value, Context context)
        throws IOException, InterruptedException {
      String line = value.toString();
      System.out.println("job1:mapInp:-" + line);
      String[] info = line.split(" ");
      info[0] = info[0].trim();
      info[1] = info[1].trim();
      String lstfnames = "", fname = "";
      try {
        Configuration config = new Configuration();
        FileSystem hdfs = FileSystem.get(config);
        String prefixPath = "", fnm = "";
        Pattern x = Pattern.compile("(.*)/(.*)");
        Matcher xm = x.matcher(info[0]);
        while (xm.find()) {
          prefixPath = xm.group(1);
          fnm = xm.group(2);
        }
        String dst = "/home/" + fnm; // dst is path of the file on local system.
        hdfs.copyToLocalFile(new Path(info[0]), new Path(dst));

        Process p = Runtime.getRuntime().exec("ffmpeg -i " + dst);
        String s;

        BufferedReader stdError = new BufferedReader(new InputStreamReader(p.getErrorStream()));
        Pattern D = Pattern.compile("Duration:[ ]*([0-9]+):([0-9]+):([0-9]+)");
        long time = 0; // "time" is the duration of the input video file
        long sps = 0; // "sps" is the number of seconds(duration) of each video split
        while ((s = stdError.readLine()) != null) {
          Matcher md = D.matcher(s);
          while (md.find()) {
            time =
                Long.parseLong(md.group(1)) * 3600
                    + Long.parseLong(md.group(2)) * 60
                    + Long.parseLong(md.group(3));
          }
        }
        Process p1 = Runtime.getRuntime().exec("du -s " + dst);
        BufferedReader stdInput1 = new BufferedReader(new InputStreamReader(p1.getInputStream()));
        String s1 = "", size = ""; // "size" is the size of input video file
        while ((s1 = stdInput1.readLine()) != null) {
          String s11[] = s1.split("\t");
          size = s11[0];
        }
        sps = (64 * 1024) * time / (Long.parseLong(size)); // chunk size is 64MB
        String hr, min, sc;
        hr = Long.toString((sps / 3600));
        min = Long.toString((sps % 3600) / 60);
        sc = Long.toString(sps % 60);
        if (hr.length() < 2) hr = "0" + hr;
        if (min.length() < 2) min = "0" + min;
        if (sc.length() < 2) sc = "0" + sc;
        String splt = hr + ":" + min + ":" + sc;

        String query =
            "mencoder -oac copy -ovc copy -ss "; // building query to split the input video file
        String app = "", inpExt = "";
        Pattern xx = Pattern.compile("(.*)\\.(.*)");
        Matcher xxm = xx.matcher(dst);
        while (xxm.find()) {
          fname = xxm.group(1);
          inpExt = xxm.group(2);
        }
        String[] tmpArr = fname.split("/");
        String hdfsFname = "";
        long stSrt = 0;
        int cnt = 0;

        while (true) {
          if (stSrt > time) break;
          if (stSrt + sps > time) {
            long t = time - stSrt;
            hr = Long.toString((t / 3600));
            min = Long.toString((t % 3600) / 60);
            sc = Long.toString(t % 60);
            if (hr.length() < 2) hr = "0" + hr;
            if (min.length() < 2) min = "0" + min;
            if (sc.length() < 2) sc = "0" + sc;
            splt = hr + ":" + min + ":" + sc;
          }
          cnt++;
          hr = Long.toString((stSrt / 3600));
          min = Long.toString((stSrt % 3600) / 60);
          sc = Long.toString(stSrt % 60);
          if (hr.length() < 2) hr = "0" + hr;
          if (min.length() < 2) min = "0" + min;
          if (sc.length() < 2) sc = "0" + sc;
          app =
              hr
                  + ":"
                  + min
                  + ":"
                  + sc
                  + " -endPos "
                  + splt
                  + " "
                  + dst
                  + " -o "
                  + fname
                  + "_"
                  + Integer.toString(cnt)
                  + "."
                  + inpExt;

          Process p2 = Runtime.getRuntime().exec(query + app);
          String ls_str = "";
          DataInputStream ls_in = new DataInputStream(p2.getInputStream());
          while ((ls_str = ls_in.readLine()) != null) {}
          p2.destroy();
          String[] tmpArr1 = fnm.split("\\.");
          hdfs.copyFromLocalFile(
              true,
              true,
              new Path(fname + "_" + Integer.toString(cnt) + "." + inpExt),
              new Path(prefixPath + "/" + tmpArr1[0] + "_" + Integer.toString(cnt) + "." + inpExt));
          lstfnames +=
              prefixPath + "/" + tmpArr1[0] + "_" + Integer.toString(cnt) + "." + inpExt + " #!# ";
          stSrt += sps;
        }
        Runtime rt1 = Runtime.getRuntime();
        String[] cmd1 = {"/bin/bash", "-c", "rm " + dst}; // delete the file after use
        Process pr1 = rt1.exec(cmd1);
        pr1.waitFor();
        lstfnames += "*" + info[1];

        context.write(
            new Text(fname),
            new Text(
                lstfnames)); // "fname" contains name of the input video file with
                             // extension(eg.".avi") removed #### "lstfnames" is a string, contains
                             // all the names of video splits(concatenated)
        System.out.println("lstfnames : " + lstfnames);
      } catch (IOException e) {
        System.out.println("exception happened - here's what I know: ");
        e.printStackTrace();
        System.exit(-1);
      }
    }
예제 #2
0
    // merge the converted files here
    public void reduce(Text key, Iterable<Text> values, Context context)
        throws IOException, InterruptedException {
      System.out.println("I'm in Job2 reduce");

      Configuration config = new Configuration();
      FileSystem hdfs = FileSystem.get(config);
      try {
        String out = "";
        for (Text t : values) {
          out = t.toString();
          out = out.trim();
          System.out.println("job2:redInp:-" + out);
          break;
        }
        String[] outl = out.split(" #!# ");

        Pattern x = Pattern.compile("(.*)/(.*)\\.(.*)");
        Matcher xm = x.matcher(outl[0]);
        String prefixPath = "", fnm = "", ext = "";
        while (xm.find()) {
          prefixPath = xm.group(1);
          fnm = xm.group(2);
          ext = xm.group(3);
        }
        String foutname = fnm.split("_")[0];
        foutname += "." + ext;
        String query = "mencoder -oac copy -ovc copy";
        int cnt = 0;
        for (String st : outl) {
          cnt++;
          hdfs.copyToLocalFile(
              true,
              new Path(st),
              new Path("/home/" + fnm.split("_")[0] + "_" + Integer.toString(cnt) + "." + ext));
          query += " " + "/home/" + fnm.split("_")[0] + "_" + Integer.toString(cnt) + "." + ext;
        }
        query += " -o " + "/home/" + foutname;
        Process p2 =
            Runtime.getRuntime().exec(query); // query for merging the video files is executed here
        String ls_str = "";
        DataInputStream ls_in = new DataInputStream(p2.getInputStream());
        while ((ls_str = ls_in.readLine()) != null) {}
        p2.destroy();
        hdfs.copyFromLocalFile(
            true, true, new Path("/home/" + foutname), new Path(prefixPath + "/" + foutname));
        cnt = 0;
        String dlt1 = "";
        for (String st3 : outl) {
          cnt++;
          dlt1 += " " + "/home/" + fnm.split("_")[0] + "_" + Integer.toString(cnt) + "." + ext;
        }
        Runtime rt1 = Runtime.getRuntime();
        String[] cmd1 = {"/bin/bash", "-c", "rm" + dlt1}; // delete the files after use
        Process pr1 = rt1.exec(cmd1);
        pr1.waitFor();
        context.write(new Text(""), new Text(prefixPath + "/" + foutname));
      } catch (IOException e) {
        System.out.println("exception happened - here's what I know: ");
        e.printStackTrace();
        System.exit(-1);
      }
    }
예제 #3
0
    // Video splts are converted to target format here...
    public void map(Object key, Text value, Context context)
        throws IOException, InterruptedException {
      try {
        Configuration config = new Configuration();
        FileSystem hdfs = FileSystem.get(config);

        String st = value.toString();
        st = st.trim();
        System.out.println("job2:mapInp:-" + st);
        String[] fmt = st.split(" #!# \\*");
        String[] lst = fmt[0].split(" #!# ");

        String out = "", dlt = "";
        int flag = 1;
        for (String st1 : lst) {

          Pattern x = Pattern.compile("(.*)/(.*)");
          Matcher xm = x.matcher(st1);
          String prefixPath = "", fnm = "", inpExt = "";
          while (xm.find()) {
            prefixPath = xm.group(1);
            fnm = xm.group(2);
          }
          String[] tmpArr = fnm.split("\\.");
          fnm = tmpArr[0];
          inpExt = tmpArr[1];
          hdfs.copyToLocalFile(true, new Path(st1), new Path("/home/" + fnm + "." + inpExt));
          String fname = "/home/" + fnm;
          if (flag == 1) {
            flag = 0;
            out += prefixPath + "/" + fnm + "." + fmt[1];
          } else {
            out += " #!# " + prefixPath + "/" + fnm + "." + fmt[1];
          }

          if (fmt[1].equals("mpg") || fmt[1].equals("mpeg") || fmt[1].equals("mp4")) {

            Process p =
                Runtime.getRuntime()
                    .exec(
                        "mencoder -of mpeg -ovc lavc -lavcopts vcodec=mpeg1video -oac copy "
                            + "/home/"
                            + fnm
                            + "."
                            + inpExt
                            + " -o "
                            + fname
                            + "."
                            + fmt[1]);

            String ls_str = "";
            DataInputStream ls_in = new DataInputStream(p.getInputStream());
            while ((ls_str = ls_in.readLine()) != null) {}

            p.destroy();
            dlt += " /home/" + fnm + "." + inpExt;
          } else if (fmt[1].equals("avi")) {

            Process p =
                Runtime.getRuntime()
                    .exec(
                        "mencoder -ovc lavc -oac mp3lame -o "
                            + fname
                            + "."
                            + fmt[1]
                            + " "
                            + "/home/"
                            + fnm
                            + "."
                            + inpExt);

            String ls_str = "";
            DataInputStream ls_in = new DataInputStream(p.getInputStream());
            while ((ls_str = ls_in.readLine()) != null) {}

            p.destroy();
            dlt += " /home/" + fnm + "." + inpExt;
          } else {
            // TBD
            System.out.println("Unsupported target format!!!!!");
          }
          hdfs.copyFromLocalFile(
              true,
              true,
              new Path(fname + "." + fmt[1]),
              new Path(prefixPath + "/" + fnm + "." + fmt[1]));
        }

        Runtime rt1 = Runtime.getRuntime();
        String[] cmd1 = {"/bin/bash", "-c", "rm" + dlt}; // delete the files after use
        Process pr1 = rt1.exec(cmd1);
        pr1.waitFor();

        System.out.println("Job2 mapOut:" + out);
        context.write(new Text(lst[0]), new Text(out));
        System.out.println(out);
      } catch (IOException e) {
        System.out.println("exception happened - here's what I know: ");
        e.printStackTrace();
        System.exit(-1);
      }
    }