fix(subtitle): keep cue-less webvtt instead of failing the download

A rendition with headers but no cues raised CaptionReadNoCaptions when preserve_formatting is false, aborting the whole download.
2026-11-12 20:15:10 +00:00 · 2026-08-12 11:42:15 -06:00
parent 16ae73e3a0
commit 274b2fc308
1 changed files with 3 additions and 0 deletions
@@ -291,6 +291,9 @@ class Subtitle(Track):
                    Subtitle.filter_unwanted_cues(caption_set)
                    subtitle_text = pycaption.WebVTTWriter().write(caption_set)
                    self.path.write_text(subtitle_text, encoding="utf8")
+                except pycaption.exceptions.CaptionReadNoCaptions:
+                    # some renditions carry headers but no cues; write them out rather than fail the download
+                    self.path.write_text(text, encoding="utf8")
                except pycaption.exceptions.CaptionReadSyntaxError:
                    # If first attempt fails, try more aggressive sanitization
                    text = Subtitle.sanitize_webvtt(text)