s8n/legacy-arrflix
s8n/legacy-arrflix
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legacy-arrflix/processes/subtitles/CHANGELOG.md
s8n 43f55643be processes/subtitles: v3 Addic7ed fetcher + AD 49/58 subbed 
Adds lib/sub-a7d-fetch.py: free, no-daily-cap path via subliminal's
addic7ed provider (anonymous). Uses OpenSubtitles REST search-only (no
quota cost) to translate library S/E to the show's primary catalogue
numbering, then drives subliminal to download from Addic7ed and writes
sidecars direct to nullstone via SSH.

Picker quirks: subliminal series-name matcher is broken by '!' in the
title, so the script strips it before building the synthetic
Video.fromname() string. OS feature_details S/E happens to align with
Addic7ed's indexing for the test show (American Dad).

Recipe README now reflects three paths in cheapest-first order: v3
Addic7ed, v2 OS REST (20/day), v1 plugin. American Dad run log updated
to 49/58 (S01 7/7 v1, S02 16/16 mixed v2/v3, S03 16/19 v3, S04 10/16
v3). 9 misses identified, deferred to next OS REST quota window.
2026-05-09 23:31:10 +01:00

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Subtitle process — changelog

v1 — 2026-05-09

Initial recipe. Drafted while running on American Dad. Distilled from doc 03-subtitles.md (Futurama work) and the actual AD run.

Approach: Jellyfin RemoteSearch/Subtitles/eng → pick best non-HI/non-MT match via Python filter → POST download → docker cp metadata cache → media folder → delete cache dupes → validation refresh.

Scope: works on shows whose library season/episode numbering matches OpenSubtitles' indexed numbering. Verified passing on AD S01 (7/7 episodes).

Known break — added 2026-05-09 same day

After S01 passed, S02 returned 0 results for every episode probed (E01, E02, E08, E13). Quota was fine (13 downloads remaining). Cause:

Jellyfin metadata for American Dad uses Hulu/DSP season ordering (S1=7, S2=16, S3=19, S4=16). OpenSubtitles indexes by Fox original-airing order where S1 has 23 episodes. The plugin queries OS by (parent_imdb_id, season_number, episode_number). For library S02E01 "Bullocks to Stan" the plugin sends S=2,E=1 but OS catalogues that episode as S=1,E=8. Result: 0 hits.

Each library episode has its own correct per-episode IMDB id (e.g. tt0511631 for "Bullocks to Stan") which would resolve directly via OS REST imdb_id= parameter, but the plugin doesn't expose that path.

v2 — 2026-05-09

Approach A chosen: direct OpenSubtitles REST API, per-episode imdb_id lookup, bypass the Jellyfin plugin entirely. New helper at lib/sub-rest-fetch.py.

  • API key file: ~/.config/arrflix-opensubtitles-api.txt (mode 600)
  • Account: Caveman5 (free tier, 20 downloads/day)
  • Saves sidecars directly to nullstone media folder via ssh ... cat >
  • No more docker-cp from /config/metadata/library cache (plugin path)

Recipe upgrade:

  • Step 4 swaps lib/sub-fetch.sh → lib/sub-rest-fetch.py for shows with non-standard season ordering.
  • Picker logic identical: filter HI/MT/AI/Forced (renamed foreign_parts_only in OS REST), prefer 23.976fps, sort by download_count desc.

v2 known quirks

  • OpenSubtitles /download endpoint rejects urllib — consistent HTTP 503 via Python urllib.request, HTTP 200 via curl with same headers/body. _curl() shim added; all OS API calls go through it. Each 503 still consumes 1 download-quota slot, so this had to be fixed before retrying large batches.
  • download_count of 0 and fps of 0.0 appear on some catalogue entries; treat as informational, not exclusionary.
  • Some hits have file_name mismatching the imdb_id searched (OS metadata drift). Recipe Step 6 visual-sync check is the catch.

v2 known limits

  • Free-tier 20/day still in force (REST and plugin share the counter).
  • Recipe Step 6 (sync verification) is still manual — no automated check that the picked .srt actually aligns with audio.

v3 — 2026-05-09

Approach Addic7ed via subliminal added as a quota-free fallback. New helper at lib/sub-a7d-fetch.py. Runs alongside v2; pick whichever fits.

  • subliminal Python lib drives addic7ed provider, anonymous
  • OS REST is still consulted (search-only, no quota cost) to translate library Hulu numbering to the show's primary catalogue numbering, since Addic7ed and OS feature_details appear to align for at least the test show (American Dad)
  • Sidecar written direct to nullstone via ssh ... cat >

v3 picker / matching

  • subliminal returns ordered candidates by match score; takes first
  • "!" in series name breaks subliminal's matcher; recipe strips it before building the synthetic filename for Video.fromname()
  • Synthetic filename pattern: Series.Name.Year.SXXEYY.HDTV.x264.mkv

v3 known quirks

  • Some episodes return 0 hits at addic7ed for the OS-feat-details S/E we pass — likely cases where addic7ed indexes by Fox airing order while OS uses DVD-compressed (or vice versa). On American Dad, ~9 of 58 episodes missed via this path. Fall back to v2 OS REST when quota allows.
  • One episode (Black Mystery Month) had a hit but downloaded empty content — addic7ed-side cataloguing error or temp 0-byte upload.
  • Per-show coverage varies: Addic7ed has near-complete English on broadcast US shows but spotty for animated specials and obscure titles.

v3 known limits

  • English coverage best; non-English near-empty
  • Anonymous downloads work but heavy bursts may trigger Addic7ed's bot detection and short IP throttle (~1 hour). The script makes no effort at jittering / backoff
  • No automated sync-quality check; recipe Step 6 still manual