From 48ef4303e9fa5e5431c7d8013b8a8c8e04883048 Mon Sep 17 00:00:00 2001
From: 4O4-Not-F0und <94159754+4O4-Not-F0und@users.noreply.github.com>
Date: Sun, 3 Aug 2025 04:05:16 +0000
Subject: [PATCH] Repair fragments in info file from --live-from-start. See
 #13906

---
 yt_dlp/YoutubeDL.py | 22 ++++++++++++++++++++++
 yt_dlp/__init__.py  |  1 +
 2 files changed, 23 insertions(+)

diff --git a/yt_dlp/YoutubeDL.py b/yt_dlp/YoutubeDL.py
index a9f347bf4..d8a31ea54 100644
--- a/yt_dlp/YoutubeDL.py
+++ b/yt_dlp/YoutubeDL.py
@@ -1840,6 +1840,27 @@ def add_default_extra_info(self, ie_result, ie, url):
                 'extractor_key': ie.ie_key(),
             })
 
+    # Repair fragments in info file from --live-from-start
+    # see https://github.com/yt-dlp/yt-dlp/issues/13906
+    def _repair_ie_fragments(self, ie_result):
+        try:
+            protocol = ie_result.get('protocol')
+            if (protocol is not None
+                    and 'http_dash_segments_generator' in protocol.split('+')
+                    and ie_result.get('is_live')
+                    and bool(self.params.get('live_from_start'))
+                    and self.params.get('_load_info_filename') is not None
+                ):
+                self.to_screen('Repairing fragments for live-from-start stream from JSON')
+
+                ie = self.get_info_extractor(ie_result.get('extractor_key'))
+                webpage_url = ie_result.get('webpage_url')
+                ie._prepare_live_from_start_formats(
+                    ie_result['formats'], ie_result['id'], ie_result.get('release_timestamp'),
+                    webpage_url, webpage_url, {}, ie_result.get('live_status') == 'is_live')
+        except Exception as e:
+            self.report_warning(f'Could not repair fragments: {e}')
+
     def process_ie_result(self, ie_result, download=True, extra_info=None):
         """
         Take the result of the ie(may be modified) and resolve all unresolved
@@ -1876,6 +1897,7 @@ def process_ie_result(self, ie_result, download=True, extra_info=None):
                 return ie_result
 
         if result_type == 'video':
+            self._repair_ie_fragments(ie_result)
             self.add_extra_info(ie_result, extra_info)
             ie_result = self.process_video_result(ie_result, download=download)
             self._raise_pending_errors(ie_result)
diff --git a/yt_dlp/__init__.py b/yt_dlp/__init__.py
index 2e7646b7e..b449606bc 100644
--- a/yt_dlp/__init__.py
+++ b/yt_dlp/__init__.py
@@ -974,6 +974,7 @@ def parse_options(argv=None):
         '_warnings': warnings,
         '_deprecation_warnings': deprecation_warnings,
         'compat_opts': opts.compat_opts,
+        '_load_info_filename': opts.load_info_filename,
     })