diff --git a/README.md b/README.md
index 2f08c1a..b9d6362 100644
--- a/README.md
+++ b/README.md
@@ -26,8 +26,9 @@ pdf2img.setOptions({
   size: 1024,                                 // default 1024
   density: 600,                               // default 600
   outputdir: __dirname + path.sep + 'output', // output folder, default null (if null given, then it will create folder name same as file name)
-  outputname: 'test',                         // output file name, dafault null (if null given, then it will create image name same as input name)
-  page: null                                  // convert selected page, default null (if null given, then it will convert all pages)
+  outputname: 'test',                         // output file name, default null (if null given, then it will create image name same as input name)
+  page: null,                                 // convert selected page, default null (if null given, then it will convert all pages)
+  startindex: 1                               // index to start width, default 1 (if not present, will start at 0)
 });
 
 pdf2img.convert(input, function(err, info) {
diff --git a/lib/pdf2img.js b/lib/pdf2img.js
index 9c2e9a8..392b699 100644
--- a/lib/pdf2img.js
+++ b/lib/pdf2img.js
@@ -11,7 +11,8 @@ var options = {
   density: 600,
   outputdir: null,
   outputname: null,
-  page: null
+  page: null,
+  startindex: 1
 };
 
 var Pdf2Img = function() {};
@@ -23,6 +24,7 @@ Pdf2Img.prototype.setOptions = function(opts) {
   options.outputdir = opts.outputdir || options.outputdir;
   options.outputname = opts.outputname || options.outputname;
   options.page = opts.page || options.page;
+  options.startindex = opts.startindex || options.startindex;
 };
 
 Pdf2Img.prototype.convert = function(input, callbackreturn) {
@@ -66,49 +68,46 @@ Pdf2Img.prototype.convert = function(input, callbackreturn) {
 
   async.waterfall([
     // Get pages count
-        function (callback) {
-             gm(input).identify("%p ", function (err, value) {
-                var pageCount = String(value).split(' ');
-
-                if (!pageCount.length) {
-                    callback({
-                        result: 'error',
-                        message: 'Invalid page number.'
-                    }, null);
-                } else {
-                    // Convert selected page
-                    if (options.page !== null) {
-                        if (options.page < pageCount.length) {
-                            callback(null, [options.page]);
-                        } else {
-                            callback({
-                                result: 'error',
-                                message: 'Invalid page number.'
-                            }, null);
-                        }
-                    } else  {
-                        callback(null, pageCount);
-                    }
-                }
-
-            })
-
-        },
+    function(callback) {
+      var cmd = 'gm identify -format "%p " "' + input + '"';
+      var execSync = require('child_process').execSync;
+      var pageCount = execSync(cmd).toString().match(/[0-9]+/g);
 
+      if (!pageCount.length) {
+        return callback({
+          result: 'error',
+          message: 'Invalid page number.'
+        }, null);
+      }
+
+      // Convert selected page
+      if (options.page !== null) {
+        if (options.page < pageCount.length) {
+          return callback(null, [options.page]);
+        } else {
+          return callback({
+            result: 'error',
+            message: 'Invalid page number.'
+          }, null);
+        }
+      }
+
+      return callback(null, pageCount);
+    },
 
     // Convert pdf file
     function(pages, callback) {
       // Use eachSeries to make sure that conversion has done page by page
       async.eachSeries(pages, function(page, callbackmap) {
         var inputStream = fs.createReadStream(input);
-        var outputFile = options.outputdir + options.outputname + '_' + page + '.' + options.type;
+        var outputFile = options.outputdir + options.outputname + '_' + (+page + options.startindex - 1) + '.' + options.type;
 
         convertPdf2Img(inputStream, outputFile, parseInt(page), function(error, result) {
           if (error) {
             return callbackmap(error);
           }
-
           stdout.push(result);
+          callbackreturn(null, {result: 'page_processed', message: result});
           return callbackmap(error, result);
         });
       }, function(e) {