Fix streamtags remove list

tests/unit/test_media_descriptor_change_set.py

@@ -77,7 +77,48 @@ class MediaDescriptorChangeSetTests(unittest.TestCase):
         self.assertIn("THIS_IS=embedded-subtitle", metadata_tokens)
         self.assertIn("EXTERNAL_KEEP=keep-me", metadata_tokens)
         self.assertNotIn("BPS=remove-me", metadata_tokens)
-        self.assertNotIn("BPS=", metadata_tokens)
+        self.assertIn("BPS=", metadata_tokens)
+
+    def test_target_only_tracks_still_emit_remove_tokens_for_configured_stream_keys(self):
+        context = {
+            "logger": get_ffx_logger(),
+            "config": StaticConfig(
+                {
+                    "metadata": {
+                        "remove": ["creation_time"],
+                        "streams": {
+                            "remove": ["BPS"],
+                        }
+                    }
+                }
+            ),
+        }
+
+        target_track = TrackDescriptor(
+            index=0,
+            source_index=0,
+            sub_index=0,
+            track_type=TrackType.AUDIO,
+            tags={
+                "language": "eng",
+                "title": "Main Audio",
+                "BPS": "remove-me",
+                "KEEP_ME": "keep-me",
+            },
+        )
+
+        change_set = MediaDescriptorChangeSet(
+            context,
+            MediaDescriptor(tags={"creation_time": "remove-me"}, track_descriptors=[target_track]),
+        )
+
+        metadata_tokens = change_set.generateMetadataTokens()
+
+        self.assertIn("-metadata:g", metadata_tokens)
+        self.assertIn("creation_time=", metadata_tokens)
+        self.assertIn("-metadata:s:a:0", metadata_tokens)
+        self.assertIn("BPS=", metadata_tokens)
+        self.assertIn("KEEP_ME=keep-me", metadata_tokens)
 
 
 if __name__ == "__main__":