finished debugging and ready to test the webvtt stuff

lib/utils.js

@@ -41,7 +41,15 @@ exports.generateThumbnails = function(source, options, callback) {
   }
 
   function success(filenames) {
-    callback(null, filenames)
+    //TODO: Find a less hacky method to solve the problem that no filenames are returned
+    let myfiles = [],
+      aOutput = this._outputs;
+
+    for(let item of aOutput){
+      myfiles.push(item.target.replace(/^.*[\\\/]/, ''));
+    }
+    console.log(myfiles);
+    callback(null, myfiles)
   }
 }
 

playground/test.js

@@ -7,7 +7,7 @@ thumbgen('./tmp/oceans.mp4', {
   size:            {
     width: 100
   },
-  numThumbnails:   6,
+  numThumbnails:   10,
   spritesheet:     true
 }, function(err, metadata) {
   if (err) {