cb170dfd32
Two visual gaps for non-catalog downloads: - Channel link: YouTube already exposes channel_url; Facebook exposes none but a numeric uploader_id that resolves at facebook.com/<id>. `_uploader_url` derives it so the auto-detected channel renders as a real clickable link. - Poster: a source with no thumbnail (e.g. a direct reddit HLS URL) showed a blank image box. The worker now cuts a representative frame with ffmpeg (`ensure_poster`) into the `<base>.jpg` sidecar and records `poster_path` (migration 0050). The card, the public watch page (<video poster> + og:image), and link previews fall back to it via new authed + public poster endpoints. Adds `app.downloads.backfill` (one-off, re-run-safe) to fill uploader_url (re-extract YouTube/Facebook metadata) and posters for pre-existing downloads.
94 lines
3.7 KiB
Python
94 lines
3.7 KiB
Python
"""One-off backfill for downloads made before per-asset channel URLs + poster fallbacks existed.
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Fills `media_assets.uploader_url` (re-extracting metadata for YouTube/Facebook sources, so an
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auto-detected channel becomes a clickable link) and `poster_path` (an ffmpeg frame for
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thumbnail-less sources, so the card / watch page / link preview still shows an image). Best-effort
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and safe to re-run: it only touches assets still missing the field, and only re-fetches YouTube /
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Facebook sources (a direct media URL like a reddit HLS manifest carries no channel and its signed
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URL may have expired — those just get a locally-generated poster instead).
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Run once per environment:
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docker exec siftlode-worker-1 python -c "from app.downloads import backfill; print(backfill.run())"
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"""
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import logging
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from urllib.parse import urlparse
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import yt_dlp
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from sqlalchemy import select
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from app.config import settings
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from app.db import SessionLocal
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from app.downloads import edit as editmod
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from app.downloads import formats, service
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from app.models import MediaAsset
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from app.worker import _uploader_url
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log = logging.getLogger("siftlode.backfill")
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def _should_refetch(asset: MediaAsset) -> bool:
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"""Only YouTube + Facebook sources have a derivable channel URL worth a network round-trip."""
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if asset.source_kind == "youtube":
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return True
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if asset.source_kind == "url":
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host = urlparse(asset.source_ref).netloc.lower()
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return "facebook.com" in host or "fb.watch" in host
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return False
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def _extract_meta(url: str) -> dict | None:
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"""Metadata-only yt-dlp extraction, trying the same client sets as the worker (YouTube needs the
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POT/player-client strategy even just to extract)."""
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client_sets = [
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c for c in (settings.player_client_list, settings.player_client_fallback_list) if c
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] or [None]
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for clients in client_sets:
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opts = formats.build_ydl_opts(
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{}, "%(id)s.%(ext)s", lambda d: None, settings.download_pot_base_url, clients
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)
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opts["skip_download"] = True
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try:
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with yt_dlp.YoutubeDL(opts) as ydl:
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info = ydl.extract_info(url, download=False)
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if info:
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return info
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except Exception as exc: # noqa: BLE001 — best-effort backfill, keep going
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log.info("meta extract failed for %s (%s): %s", url, clients, str(exc)[:100])
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return None
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def run() -> dict:
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filled_url = filled_poster = 0
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with SessionLocal() as db:
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assets = (
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db.execute(
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select(MediaAsset).where(
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MediaAsset.status == "ready", MediaAsset.rel_path.is_not(None)
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)
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)
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.scalars()
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.all()
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)
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for a in assets:
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if a.uploader_url is None and _should_refetch(a):
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url = a.source_webpage_url or service.source_url(a.source_kind, a.source_ref)
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info = _extract_meta(url)
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uu = _uploader_url(info) if info else None
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if uu:
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a.uploader_url = uu
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filled_url += 1
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log.info("asset %s uploader_url <- %s", a.id, uu)
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if a.thumbnail_url is None and a.poster_path is None:
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rel = editmod.ensure_poster(a, settings.download_root)
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if rel:
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a.poster_path = rel
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filled_poster += 1
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log.info("asset %s poster <- %s", a.id, rel)
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db.commit()
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result = {
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"assets": len(assets),
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"filled_uploader_url": filled_url,
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"filled_poster": filled_poster,
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}
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log.info("backfill done: %s", result)
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return result
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