image width/height must be >0

pandora/annotation/models.py

@@ -114,10 +114,7 @@ class Annotation(models.Model):
         Annotation.objects.filter(id=self.id).update(public_id=self.public_id)
 
     def save(self, *args, **kwargs):
-        if not self.id:
-            set_public_id = True
-        else:
-            set_public_id = False
+        set_public_id = not self.id
 
         #no clip or update clip
         if not self.clip and not self.layer.private or \

pandora/archive/extract.py

@@ -265,6 +265,9 @@ def resize_image(image_source, image_output, width=None, size=None):
             height = int(width / (float(source_width) / source_height))
             height = height - height % 2
 
+        width = min(width, 1)
+        height = min(height, 1)
+
         if width < source_width:
             resize_method = Image.ANTIALIAS
         else: