diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6670f0d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,54 @@
+
+# Created by https://www.gitignore.io/api/node
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules
+jspm_packages
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+
+# End of https://www.gitignore.io/api/node
diff --git a/README.md b/README.md
index c6fe0e5..7b81f84 100644
--- a/README.md
+++ b/README.md
@@ -31,11 +31,13 @@ var webp=require('webp-converter');
 
 //cwebp(input,output,option,result_callback)
 
-webp.cwebp("input.jpg","output.webp","-q 80",function(status)
+webp.cwebp("input.jpg","output.webp","-q 80",function(err, status)
 	{
-		//if exicuted successfully status will be '100'
-		//if exicuted unsuccessfully status will be '101'
-		console.log(status);
+		//if executed successfully status will be '100'
+		//if executed unsuccessfully status will be '101'
+      if (!err) {
+        console.log(status);
+      };
 	});
 
 
@@ -53,11 +55,13 @@ var webp=require('webp-converter');
 
 //dwebp(input,output,option,result_callback)
 
-webp.dwebp("input.webp","output.jpg","-o",function(status)
+webp.dwebp("input.webp","output.jpg","-o",function(err, status)
 	{
-		//if exicuted successfully status will be '100'
-		//if exicuted unsuccessfully status will be '101'
-		console.log(status);
+    //if executed successfully status will be '100'
+    //if executed unsuccessfully status will be '101'
+      if (!err) {
+        console.log(status);
+      };
 	});
 
 ```
@@ -75,11 +79,13 @@ var webp=require('webp-converter');
 
 //gwebp(input,output,option,result_callback)
 
-webp.gwebp("input.gif","output.webp","-q 80",function(status)
+webp.gwebp("input.gif","output.webp","-q 80",function(err, status)
 	{
-		//if exicuted successfully status will be '100'
-		//if exicuted unsuccessfully status will be '101'
-		console.log(status);
+    //if executed successfully status will be '100'
+    //if executed unsuccessfully status will be '101'
+      if (!err) {
+        console.log(status);
+      };
 	});
 
 
@@ -101,11 +107,13 @@ var webp=require('webp-converter');
 
 //webpmux_add(input,output,option_profile,set_option,result_callback)
 
-webp.webpmux_add("input.webp","output.webp","image_profile.icc","icc",function(status){
+webp.webpmux_add("input.webp","output.webp","image_profile.icc","icc",function(err, status){
 
-		//if exicuted successfully status will be '100'
-		//if exicuted unsuccessfully status will be '101'
-		console.log(status);
+  //if executed successfully status will be '100'
+  //if executed unsuccessfully status will be '101'
+    if (!err) {
+      console.log(status);
+    };
 
 });
 
@@ -126,11 +134,13 @@ var webp=require('webp-converter');
 
 //webpmux_extract(input,output,option,result_callback)
 
-webp.webpmux_extract("input.webp","output.icc","icc",function(status){
+webp.webpmux_extract("input.webp","output.icc","icc",function(err, status){
 
-		//if exicuted successfully status will be '100'
-		//if exicuted unsuccessfully status will be '101'
-		console.log(status);
+  //if executed successfully status will be '100'
+  //if executed unsuccessfully status will be '101'
+    if (!err) {
+      console.log(status);
+    };
 
 });
 
@@ -151,11 +161,13 @@ var webp=require('webp-converter');
 
 //webpmux_strip(input,output,option,result_callback)
 
-webp.webpmux_strip("input.webp","ouput.webp","icc",function(status){
+webp.webpmux_strip("input.webp","ouput.webp","icc",function(err, status){
 
-		//if exicuted successfully status will be '100'
-		//if exicuted unsuccessfully status will be '101'
-		console.log(status);
+  //if executed successfully status will be '100'
+  //if executed unsuccessfully status will be '101'
+    if (!err) {
+      console.log(status);
+    };
 
 });
 
@@ -168,18 +180,18 @@ webp.webpmux_strip("input.webp","ouput.webp","icc",function(status){
 
 var webp=require('webp-converter');
 
-//pass input images(.webp image) path with FRAME_OPTIONS, as array,ouput image will be animated .webp image 
+//pass input images(.webp image) path with FRAME_OPTIONS, as array,ouput image will be animated .webp image
 
 
 /*FRAME_OPTIONS
 
 -file_i +di[+xi+yi[+mi[bi]]]
 
-e.g -frame one.webp +100 -frame two.webp +100+50+50 -frame three.webp +100+50+50+1+b 
+e.g -frame one.webp +100 -frame two.webp +100+50+50 -frame three.webp +100+50+50+1+b
 
-Where: file_i is the i'th frame (WebP format), xi,yi specify the image offset for this frame, 
-di is the pause duration before next frame, mi is the dispose method for this frame (0 for NONE or 1 for BACKGROUND) and bi is the blending method for this frame (+b for BLEND or -b for NO_BLEND). 
-Argument bi can be omitted and will default to +b (BLEND). Also, mi can be omitted if bi is omitted and will default to 0 (NONE). Finally, 
+Where: file_i is the i'th frame (WebP format), xi,yi specify the image offset for this frame,
+di is the pause duration before next frame, mi is the dispose method for this frame (0 for NONE or 1 for BACKGROUND) and bi is the blending method for this frame (+b for BLEND or -b for NO_BLEND).
+Argument bi can be omitted and will default to +b (BLEND). Also, mi can be omitted if bi is omitted and will default to 0 (NONE). Finally,
 if mi and bi are omitted then xi and yi can be omitted and will default to +0+0.
 
 -loop n
@@ -188,7 +200,7 @@ e.g 10
 
 Loop the frames n number of times. 0 indicates the frames should loop forever. Valid range is 0 to 65535 [Default: 0 (infinite)].
 
--bgcolor A,R,G,B 
+-bgcolor A,R,G,B
 
 e.g 255,255,255,255
 
@@ -199,11 +211,13 @@ Background color of the canvas. Where: A, R, G and B are integers in the range 0
 
 var input=["./frames/tmp-0.webp +100","./frames/tmp-1.webp +100+50+50","./frames/tmp-2.webp +100+50+50+1+b"];
 
-webp.webpmux_animate(input,"anim_container.webp","10","255,255,255,255",function(status)
+webp.webpmux_animate(input,"anim_container.webp","10","255,255,255,255",function(err, status)
 	{
-		//if exicuted successfully status will be '100'
-		//if exicuted unsuccessfully status will be '101'
-		console.log(status);
+    //if executed successfully status will be '100'
+    //if executed unsuccessfully status will be '101'
+      if (!err) {
+        console.log(status);
+      };
 	});
 
 
@@ -219,11 +233,13 @@ var webp=require('webp-converter');
 
 //webpmux_getframe(input,ouput,frame number,result_callback)
 
-webp.webpmux_getframe("anim_container.webp","output.webp","2",function(status){
+webp.webpmux_getframe("anim_container.webp","output.webp","2",function(err, status){
 
-		//if exicuted successfully status will be '100'
-		//if exicuted unsuccessfully status will be '101'
-		console.log(status);
+  //if executed successfully status will be '100'
+  //if executed unsuccessfully status will be '101'
+    if (!err) {
+      console.log(status);
+    };
 
 });
 
diff --git a/package.json b/package.json
index 5801373..86a0cbb 100644
--- a/package.json
+++ b/package.json
@@ -1,13 +1,13 @@
 {
   "name": "webp-converter",
-  "version": "2.1.6",
+  "version": "2.1.7",
   "description": "A small node.js library for converting any image to webp file format or converting webp image to any image file format.",
   "main": "webpconverter.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "start":"node app.js"
+    "start": "node app.js"
   },
- "repository": {
+  "repository": {
     "type": "git",
     "url": "https://github.com/scionoftech/webp-converter.git"
   },
@@ -43,5 +43,8 @@
     "frames/"
   ],
   "author": "scionoftech",
-  "license": "MIT"
+  "license": "MIT",
+  "dependencies": {
+    "debug": "^2.6.0"
+  }
 }
diff --git a/webpconverter.js b/webpconverter.js
index 2d38646..3f49546 100644
--- a/webpconverter.js
+++ b/webpconverter.js
@@ -2,37 +2,39 @@ var exec = require('child_process').execFile;//get child_process module
 var enwebp=require('./cwebp.js');//get cwebp module(converts other image format to webp)
 var dewebp=require('./dwebp.js');//get dwebp module(converts webp format to other image)
 var gifwebp=require('./gwebp.js');//get gif2webp module(convert git image to webp)
-var webpmux=require('./webpmux.js');//get webpmux module(convert non animated webp images to animated webp) 
+var webpmux=require('./webpmux.js');//get webpmux module(convert non animated webp images to animated webp)
+var debug=require('debug')('webp-converter');//Debug module, call "DEBUG=webp-converter node yourAppHere.js" to debug
 
 
 /******************************************************* cwebp *****************************************************/
 
-//now convert image to .webp format 
+//now convert image to .webp format
 module.exports.cwebp =function(input_image,output_image,option,callback)
 {
 
 // input_image: input image(.jpeg, .pnp ....)
-//output_image: output image .webp 
+//output_image: output image .webp
 //option: options and quality,it should be given between 0 to 100
 
-var query = option +' '+ input_image +' -o '+ output_image;//command to convert image 
+var query = option +' '+ input_image +' -o '+ output_image;//command to convert image
 
-console.log(query);
+debug(query);
 
 //enwebp() return which platform webp library should be used for conversion
- exec(enwebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(enwebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
 
 /******************************************************* dwebp *****************************************************/
 
-//now convert .webp to other image format 
+//now convert .webp to other image format
 module.exports.dwebp =function(input_image,output_image,option,callback)
 {
 
@@ -40,42 +42,45 @@ module.exports.dwebp =function(input_image,output_image,option,callback)
 //output_image: output image(.jpeg, .pnp ....)
 //option: options and quality,it should be given between 0 to 100
 
-var query = input_image + ' ' + option + ' ' + output_image;//command to convert image 
-
+var query = input_image + ' ' + option + ' ' + output_image;//command to convert image
 
-console.log(query);
+debug(query);
 
 //dewebp() return which platform webp library should be used for conversion
- exec(dewebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
+ exec(dewebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
  		if(error){
- 			callback("101"+"\n"+error);//return error code
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
 
 /******************************************************* gif2webp *****************************************************/
 
-//now convert .gif image to .webp format 
+//now convert .gif image to .webp format
 module.exports.gwebp =function(input_image,output_image,option,callback)
 {
 
 // input_image: input image(.jpeg, .pnp ....)
-//output_image: /output image .webp 
+//output_image: /output image .webp
 //option: options and quality,it should be given between 0 to 100
 
 
-var query = option +' '+ input_image +' -o '+ output_image;//command to convert image 
+var query = option +' '+ input_image +' -o '+ output_image;//command to convert image
+
+debug(query);
 
 //gifwebp() return which platform webp library should be used for conversion
- exec(gifwebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(gifwebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
@@ -88,19 +93,22 @@ module.exports.webpmux_add =function(input_image,output_image,icc_profile,option
 {
 
 // input_image: input image(.webp)
-//output_image: output image .webp  
+//output_image: output image .webp
 //icc_profile: icc profile
 //option: get or set option (icc,xmp,exif)
 
 var query = '-set '+ option +' '+ icc_profile +' '+ input_image +' -o '+ output_image;
 
+debug(query);
+
 //webpmux() return which platform webp library should be used for conversion
- exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
@@ -110,49 +118,55 @@ var query = '-set '+ option +' '+ icc_profile +' '+ input_image +' -o '+ output_
 module.exports.webpmux_extract =function(input_image,icc_profile,option,callback)
 {
 
-// input_image: input image(.webp) 
+// input_image: input image(.webp)
 //icc_profile: icc profile
 
 var query = '-get '+ option +' '+ input_image +' -o '+ icc_profile;
 
+debug(query);
+
 //webpmux() return which platform webp library should be used for conversion
- exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
 
-//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Strip ICC profile,XMP metadata and EXIF metadata 
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Strip ICC profile,XMP metadata and EXIF metadata
 
 module.exports.webpmux_strip =function(input_image,output_image,option,callback)
 {
 
-// input_image: input image(.webp) 
+// input_image: input image(.webp)
 //output_image: output image .webp
 
 var query = '-strip '+ option +' '+ input_image +' -o '+ output_image;
 
+debug(query);
+
 //webpmux() return which platform webp library should be used for conversion
- exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
 
-//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Create an animated WebP file from Webp images 
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Create an animated WebP file from Webp images
 
 module.exports.webpmux_animate =function(input_images,output_image,loop,bgcolor,callback)
 {
 
-// input_images: array of image(.webp) 
+// input_images: array of image(.webp)
 //output_image: animatedimage .webp
 //loop:Loop the frames n number of times
 //bgcolor: Background color of the canvas
@@ -161,20 +175,23 @@ var files='-frame '+input_images[0];
 
 var j=input_images.length;
 
-for (i = 1; i < j; i++) { 
+for (i = 1; i < j; i++) {
     files=files+' -frame '+input_images[i];
 	console.log(files);
 }
 
 var query = files+' -loop '+ loop +' -bgcolor '+ bgcolor +' -o '+ output_image;
 
+debug(query);
+
 //webpmux() return which platform webp library should be used for conversion
- exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
@@ -184,19 +201,22 @@ var query = files+' -loop '+ loop +' -bgcolor '+ bgcolor +' -o '+ output_image;
 module.exports.webpmux_getframe =function(input_image,output_image,frame_number,callback)
 {
 
-// input_image: input image(.webp) 
+// input_image: input image(.webp)
 //output_image: output image .webp
 //frame_number: frame number
 
 var query = '-get frame '+ frame_number +' '+ input_image +' -o '+ output_image;
 
+debug(query);
+
 //webpmux() return which platform webp library should be used for conversion
- exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
-};
\ No newline at end of file
+};
diff --git a/webpconverter_test.js b/webpconverter_test.js
index ff53858..83ead89 100644
--- a/webpconverter_test.js
+++ b/webpconverter_test.js
@@ -1,38 +1,40 @@
 var exec = require('child_process').execFile;//get child_process module
-var enwebp=require('./cwebp_test.js');//get cwebp module(converts other image format to webp)
-var dewebp=require('./dwebp_test.js');//get dwebp module(converts webp format to other image)
-var gifwebp=require('./gwebp_test.js');//get gif2webp module(convert git image to webp)
-var webpmux=require('./webpmux_test.js');//get webpmux module(convert non animated webp images to animated webp) 
+var enwebp=require('./cwebp-test.js');//get cwebp module(converts other image format to webp)
+var dewebp=require('./dwebp-test.js');//get dwebp module(converts webp format to other image)
+var gifwebp=require('./gwebp-test.js');//get gif2webp module(convert git image to webp)
+var webpmux=require('./webpmux-test.js');//get webpmux module(convert non animated webp images to animated webp)
+var debug=require('debug')('webp-converter-test');//Debug module, call "DEBUG=webp-converter node yourAppHere.js" to debug
 
 
 /******************************************************* cwebp *****************************************************/
 
-//now convert image to .webp format 
+//now convert image to .webp format
 module.exports.cwebp =function(input_image,output_image,option,callback)
 {
 
 // input_image: input image(.jpeg, .pnp ....)
-//output_image: output image .webp 
+//output_image: output image .webp
 //option: options and quality,it should be given between 0 to 100
 
-var query = option +' '+ input_image +' -o '+ output_image;//command to convert image 
+var query = option +' '+ input_image +' -o '+ output_image;//command to convert image
 
-console.log(query);
+debug(query);
 
 //enwebp() return which platform webp library should be used for conversion
- exec(enwebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(enwebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
 
 /******************************************************* dwebp *****************************************************/
 
-//now convert .webp to other image format 
+//now convert .webp to other image format
 module.exports.dwebp =function(input_image,output_image,option,callback)
 {
 
@@ -40,42 +42,45 @@ module.exports.dwebp =function(input_image,output_image,option,callback)
 //output_image: output image(.jpeg, .pnp ....)
 //option: options and quality,it should be given between 0 to 100
 
-var query = input_image + ' ' + option + ' ' + output_image;//command to convert image 
-
+var query = input_image + ' ' + option + ' ' + output_image;//command to convert image
 
-console.log(query);
+debug(query);
 
 //dewebp() return which platform webp library should be used for conversion
- exec(dewebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
+ exec(dewebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
  		if(error){
- 			callback("101"+"\n"+error);//return error code
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
 
 /******************************************************* gif2webp *****************************************************/
 
-//now convert .gif image to .webp format 
+//now convert .gif image to .webp format
 module.exports.gwebp =function(input_image,output_image,option,callback)
 {
 
 // input_image: input image(.jpeg, .pnp ....)
-//output_image: /output image .webp 
+//output_image: /output image .webp
 //option: options and quality,it should be given between 0 to 100
 
 
-var query = option +' '+ input_image +' -o '+ output_image;//command to convert image 
+var query = option +' '+ input_image +' -o '+ output_image;//command to convert image
+
+debug(query);
 
 //gifwebp() return which platform webp library should be used for conversion
- exec(gifwebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(gifwebp(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
@@ -88,19 +93,22 @@ module.exports.webpmux_add =function(input_image,output_image,icc_profile,option
 {
 
 // input_image: input image(.webp)
-//output_image: output image .webp  
+//output_image: output image .webp
 //icc_profile: icc profile
 //option: get or set option (icc,xmp,exif)
 
 var query = '-set '+ option +' '+ icc_profile +' '+ input_image +' -o '+ output_image;
 
+debug(query);
+
 //webpmux() return which platform webp library should be used for conversion
- exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
@@ -110,49 +118,55 @@ var query = '-set '+ option +' '+ icc_profile +' '+ input_image +' -o '+ output_
 module.exports.webpmux_extract =function(input_image,icc_profile,option,callback)
 {
 
-// input_image: input image(.webp) 
+// input_image: input image(.webp)
 //icc_profile: icc profile
 
 var query = '-get '+ option +' '+ input_image +' -o '+ icc_profile;
 
+debug(query);
+
 //webpmux() return which platform webp library should be used for conversion
- exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
 
-//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Strip ICC profile,XMP metadata and EXIF metadata 
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Strip ICC profile,XMP metadata and EXIF metadata
 
 module.exports.webpmux_strip =function(input_image,output_image,option,callback)
 {
 
-// input_image: input image(.webp) 
+// input_image: input image(.webp)
 //output_image: output image .webp
 
 var query = '-strip '+ option +' '+ input_image +' -o '+ output_image;
 
+debug(query);
+
 //webpmux() return which platform webp library should be used for conversion
- exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
 
-//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Create an animated WebP file from Webp images 
+//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Create an animated WebP file from Webp images
 
 module.exports.webpmux_animate =function(input_images,output_image,loop,bgcolor,callback)
 {
 
-// input_images: array of image(.webp) 
+// input_images: array of image(.webp)
 //output_image: animatedimage .webp
 //loop:Loop the frames n number of times
 //bgcolor: Background color of the canvas
@@ -161,20 +175,23 @@ var files='-frame '+input_images[0];
 
 var j=input_images.length;
 
-for (i = 1; i < j; i++) { 
+for (i = 1; i < j; i++) {
     files=files+' -frame '+input_images[i];
 	console.log(files);
 }
 
 var query = files+' -loop '+ loop +' -bgcolor '+ bgcolor +' -o '+ output_image;
 
+debug(query);
+
 //webpmux() return which platform webp library should be used for conversion
- exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
 };
@@ -184,19 +201,22 @@ var query = files+' -loop '+ loop +' -bgcolor '+ bgcolor +' -o '+ output_image;
 module.exports.webpmux_getframe =function(input_image,output_image,frame_number,callback)
 {
 
-// input_image: input image(.webp) 
+// input_image: input image(.webp)
 //output_image: output image .webp
 //frame_number: frame number
 
 var query = '-get frame '+ frame_number +' '+ input_image +' -o '+ output_image;
 
+debug(query);
+
 //webpmux() return which platform webp library should be used for conversion
- exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command 
- 	{ 
- 		if(error){
- 			callback("101"+"\n"+error);//return error code
+ exec(webpmux(),query.split(/\s+/), function (error, stdout, stderr) //execute command
+ 	{
+    if(error){
+      debug(error);
+ 			callback(error, 101);//return error code
  		}else {
-  			callback("100\nConverted Successfully");//return success code
+  			callback(null, 100);//return success code
  	      }
  });
-};
\ No newline at end of file
+};