diff --git a/generator b/generator
index 34cbdb2..2376f4b 100755
--- a/generator
+++ b/generator
@@ -93,18 +93,19 @@ def generate_video_thumbnails(args):
 
 
 def worker(queue):
-    work_unit = queue.get()
+    while True:
+        work_unit = queue.get()
 
-    # If no work unit then quit
-    if not work_unit:
-        return
+        # If no work unit then quit
+        if not work_unit:
+            return
 
-    input_file, output_file, interval, size, columns = work_unit
-    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)
+        input_file, output_file, interval, size, columns = work_unit
+        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)
 
 
 def generate_frames(file_name, video_file_clip, interval, output_prefix, size):