Ttml //free\\ Download -

print(f"Converted {len(cues)} cues.") download_ttml("https://example.com/closedcaptions.ttml")

But respect the source. Don’t hammer APIs. And always test your converted output—TTML’s richness is both its strength and its curse.

If you’ve ever tried to grab captions from a streaming service like HBO Max, Paramount+, or even some corporate video platforms, you’ve likely run into a file format that isn’t .srt or .vtt . Instead, you saw .xml or .ttml . Welcome to the world of Timed Text Markup Language (TTML)—a powerful, verbose, and often misunderstood standard.

import requests from lxml import etree def download_ttml(url, headers=None, convert_to_srt=True): resp = requests.get(url, headers=headers) resp.raise_for_status()

with open("captions.srt", "w", encoding="utf-8") as f: f.write("\n".join(cues))

yt-dlp --write-subs --sub-format ttml https://example.com/video This downloads TTML if available. Use --list-subs first to check. Larger platforms serve TTML via JSON APIs. Example from a corporate LMS:

GET /api/captions/video123?format=ttml Authorization: Bearer <token> You can find these endpoints by inspecting the tab in DevTools. 3. Understanding TTML Structure (A Quick Reference) Here’s a minimal TTML file: