dir1 = getDirectory("Choose Source Directory "); 
  list = getFileList(dir1); 
  dir2 = dir1+"analysed"+File.separator; 
  File.makeDirectory(dir2); 
  n = list.length;
  setBatchMode(true);
  for (i=0; i<n; i++) {
       path = dir1+list[i];
       if (!(File.isDirectory(path)||endsWith(path, ".db"))) {
          showProgress(i, n);
          run("AVI...", "select="+path); // File>Import>AVI
          run("8-bit"); // Image>Type>8-bit
          name = File.nameWithoutExtension;
          newname = dir2+name+"_15fps.avi";
          print (i, newname);
          run("AVI... ", "compression=Uncompressed frame=15 save="+ newname);
          close;
      }
  }