Add chapters.

fetchYoutubeSubtitle.py

@@ -70,7 +70,7 @@ async def fetchSubtitlebyType(url: str, lang: Optional[str] = 'en', subType="vtt
                         with ydl.urlopen(subtitle_url) as response:
                             subtitle = xml_caption_to_srt(response.read().decode()) if isSrt else response.read().decode()
                             print("url{}, title:{}, duration:{} len(subtitle): {}".format(url, title, duration, len(subtitle)))
-                            return {"title": title, "duration": duration,"subtitle": subtitle}
+                            return {"title": title, "duration": duration,"subtitle": subtitle, "chapters":info_dict.get("chapters", None) }
     except Exception as e:
         return {"error": str(e)}
     return {"title": title, "duration": duration, "error": "No subtitles"}