Fix for Queue when empty

generator

@@ -94,18 +94,27 @@ def generate_video_thumbnails(args):
 
 def worker(queue):
     while True:
-        work_unit = queue.get()
+        try:
+            work_unit = queue.get(False)
 
             # If no work unit then quit
             if not work_unit:
-            return
+                break
+        except:
+            break
 
         input_file, output_file, interval, size, columns = work_unit
+
+        try:
             video_file_clip = VideoFileClip(input_file)
             output_prefix = get_output_prefix()
             file_name = os.path.basename(input_file)
-        generate_frames(file_name, video_file_clip, interval, output_prefix, size)
-        generate_sprite_from_frames(output_prefix, columns, size, output_file)
+            generate_frames(file_name, video_file_clip,
+                            interval, output_prefix, size)
+            generate_sprite_from_frames(output_prefix, columns,
+                                        size, output_file)
+        except:
+            print("Error occurred with file: {}".format(file_name))
 
 
 def generate_frames(file_name, video_file_clip, interval, output_prefix, size):