Auto-create directories for output files as a convenience.

bemani/utils/afputils.py

@@ -643,6 +643,9 @@ def render_path(
             )
         )
         if len(images) > 0:
+            dirof = os.path.dirname(output)
+            os.makedirs(dirof, exist_ok=True)
+
             with open(output, "wb") as bfp:
                 images[0].save(bfp, format=fmt, save_all=True, append_images=images[1:], duration=duration, optimize=True)
 
@@ -670,6 +673,9 @@ def render_path(
             ):
                 fullname = f"{filename}-{i:{digits}}{ext}"
 
+                dirof = os.path.dirname(fullname)
+                os.makedirs(dirof, exist_ok=True)
+
                 with open(fullname, "wb") as bfp:
                     img.save(bfp, format=fmt)