[ytdl] update for yt-dlp changes

gallery_dl/ytdl.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2021-2022 Mike Fährmann
+# Copyright 2021-2023 Mike Fährmann
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
@@ -199,13 +199,18 @@ def parse_command_line(module, argv):
                     action += args
                     yield action
 
-        if getattr(opts, "parse_metadata", None) is None:
-            opts.parse_metadata = []
         if opts.metafromtitle is not None:
-            opts.parse_metadata.append("title:%s" % opts.metafromtitle)
+            if "pre_process" not in opts.parse_metadata:
+                opts.parse_metadata["pre_process"] = []
+            opts.parse_metadata["pre_process"].append(
+                "title:%s" % opts.metafromtitle)
             opts.metafromtitle = None
-        opts.parse_metadata = list(itertools.chain.from_iterable(map(
-            metadataparser_actions, opts.parse_metadata)))
+
+        opts.parse_metadata = {
+            k: list(itertools.chain.from_iterable(map(
+                    metadataparser_actions, v)))
+            for k, v in opts.parse_metadata.items()
+        }
     else:
         opts.parse_metadata = ()
 

test/test_ytdl.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-# Copyright 2022 Mike Fährmann
+# Copyright 2022-2023 Mike Fährmann
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
@@ -263,10 +263,14 @@ class Test_CommandlineArguments_YtDlp(Test_CommandlineArguments):
     def test_metadata_from_title(self):
         opts = self._(["--metadata-from-title", "%(artist)s - %(title)s"])
         self.assertEqual(opts["postprocessors"][0], {
-            "key": "MetadataParser",
-            "when": "pre_process",
-            "actions": [self.module.MetadataFromFieldPP.to_action(
-                "title:%(artist)s - %(title)s")],
+            "key"    : "MetadataParser",
+            "when"   : "pre_process",
+            "actions": {
+                "pre_process": [
+                    self.module.MetadataFromFieldPP.to_action(
+                        "title:%(artist)s - %(title)s")
+                ],
+            },
         })