diff --git a/amt/server.py b/amt/server.py
index f87df68..5f95f0c 100644
--- a/amt/server.py
+++ b/amt/server.py
@@ -710,7 +710,7 @@ def download_chapter(self, media_data, chapter_data, **kwargs):
             page_paths = self.download_pages(media_data, chapter_data, **kwargs)
             self.post_download(media_data, chapter_data, page_paths=page_paths)
 
-        self.settings.post_process(media_data, page_paths, self.settings.get_media_dir(media_data))
+        self.settings.post_process(media_data, page_paths, dir_path)
 
         self.mark_download_complete(media_data, chapter_data)
         self.logger.info("%s %d %s is downloaded; Total pages %d", media_data["name"], chapter_data["number"], chapter_data["title"], len(page_paths))
diff --git a/amt/settings.py b/amt/settings.py
index 3886536..085d025 100644
--- a/amt/settings.py
+++ b/amt/settings.py
@@ -385,4 +385,4 @@ def open_viewer(self, raw_files, server_media_chapters, raw_viewer=False):
     def post_process(self, media_data, file_paths, dir_path):
         cmd = self.get_field("post_process_cmd", media_data)
         if cmd:
-            self.run_cmd(cmd.format(files=" ".join(map(Settings._smart_quote, file_paths)), wd=dir_path, raiseException=True))
+            self.run_cmd(cmd.format(files=" ".join(map(Settings._smart_quote, file_paths))), wd=dir_path, raiseException=True)