[extractor] Reset non-repeating warnings per video

yt_dlp/extractor/common.py

@@ -442,6 +442,7 @@ class InfoExtractor(object):
         """Constructor. Receives an optional downloader."""
         self._ready = False
         self._x_forwarded_for_ip = None
+        self._printed_messages = set()
         self.set_downloader(downloader)
 
     @classmethod
@@ -470,6 +471,7 @@ class InfoExtractor(object):
 
     def initialize(self):
         """Initializes an instance (authentication, etc)."""
+        self._printed_messages = set()
         self._initialize_geo_bypass({
             'countries': self._GEO_COUNTRIES,
             'ip_blocks': self._GEO_IP_BLOCKS,
@@ -999,10 +1001,14 @@ class InfoExtractor(object):
             expected_status=expected_status)
         return res if res is False else res[0]
 
-    def report_warning(self, msg, video_id=None, *args, **kwargs):
+    def report_warning(self, msg, video_id=None, *args, only_once=False, **kwargs):
         idstr = '' if video_id is None else '%s: ' % video_id
-        self._downloader.report_warning(
-            '[%s] %s%s' % (self.IE_NAME, idstr, msg), *args, **kwargs)
+        msg = f'[{self.IE_NAME}] {idstr}{msg}'
+        if only_once:
+            if f'WARNING: {msg}' in self._printed_messages:
+                return
+            self._printed_messages.add(f'WARNING: {msg}')
+        self._downloader.report_warning(msg, *args, **kwargs)
 
     def to_screen(self, msg, *args, **kwargs):
         """Print msg to screen, prefixing it with '[ie_name]'"""
@@ -1947,7 +1953,7 @@ class InfoExtractor(object):
             self.report_warning(bug_reports_message(
                 "Ignoring subtitle tracks found in the HLS manifest; "
                 "if any subtitle tracks are missing,"
-            ))
+            ), only_once=True)
         return fmts
 
     def _extract_m3u8_formats_and_subtitles(
@@ -2230,7 +2236,7 @@ class InfoExtractor(object):
             self.report_warning(bug_reports_message(
                 "Ignoring subtitle tracks found in the SMIL manifest; "
                 "if any subtitle tracks are missing,"
-            ))
+            ), only_once=True)
         return fmts
 
     def _extract_smil_info(self, smil_url, video_id, fatal=True, f4m_params=None):
@@ -2456,7 +2462,7 @@ class InfoExtractor(object):
             self.report_warning(bug_reports_message(
                 "Ignoring subtitle tracks found in the DASH manifest; "
                 "if any subtitle tracks are missing,"
-            ))
+            ), only_once=True)
         return fmts
 
     def _extract_mpd_formats_and_subtitles(
@@ -2483,7 +2489,7 @@ class InfoExtractor(object):
             self.report_warning(bug_reports_message(
                 "Ignoring subtitle tracks found in the DASH manifest; "
                 "if any subtitle tracks are missing,"
-            ))
+            ), only_once=True)
         return fmts
 
     def _parse_mpd_formats_and_subtitles(