bugfix for a44ca5a470e09b5170fc9c3a46733f050fadbfae, 19a0394044bfad36cd665450271b8eb048a41c02, 77f9033095cd8e1092a80db67f2b577cf13f95a8

Closes #3472

2 files changed, 4 insertions, 4 deletions

diff --git a/yt_dlp/postprocessor/ffmpeg.py b/yt_dlp/postprocessor/ffmpeg.py
index 6fe1b6cdd..d909149ef 100644
--- a/yt_dlp/postprocessor/ffmpeg.py
+++ b/yt_dlp/postprocessor/ffmpeg.py
@@ -1151,7 +1151,7 @@ class FFmpegConcatPP(FFmpegPostProcessor):
         entries = info.get('entries') or []
         if not any(entries) or (self._only_multi_video and info['_type'] != 'multi_video'):
             return [], info
-        elif traverse_obj(entries, (..., 'requested_downloads', lambda _, v: len(v) > 1)):
+        elif traverse_obj(entries, (..., lambda k, v: k == 'requested_downloads' and len(v) > 1)):
             raise PostProcessingError('Concatenation is not supported when downloading multiple separate formats')
 
         in_files = traverse_obj(entries, (..., 'requested_downloads', 0, 'filepath')) or []
diff --git a/yt_dlp/postprocessor/metadataparser.py b/yt_dlp/postprocessor/metadataparser.py
index 98885bd19..51b927b91 100644
--- a/yt_dlp/postprocessor/metadataparser.py
+++ b/yt_dlp/postprocessor/metadataparser.py
@@ -6,12 +6,12 @@ from ..utils import Namespace
 
 class MetadataParserPP(PostProcessor):
     def __init__(self, downloader, actions):
-        super().__init__(self, downloader)
+        super().__init__(downloader)
         self._actions = []
         for f in actions:
             action, *args = f
             assert action in self.Actions
-            self._actions.append(action(*args))
+            self._actions.append(action(self, *args))
 
     @classmethod
     def validate_action(cls, action, *data):
@@ -21,7 +21,7 @@ class MetadataParserPP(PostProcessor):
         """
         if action not in cls.Actions:
             raise ValueError(f'{action!r} is not a valid action')
-        getattr(cls, action.value)(cls, *data)  # So this can raise error to validate
+        action(cls, *data)  # So this can raise error to validate
 
     @staticmethod
     def field_to_template(tmpl):