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jakesterpdxandClaude Fable 5
65e2e3be20
## Problem Some trackers — MyAnonamouse in particular — distribute AAC audiobooks as per-chapter `.mp4` files. That's the same ISO-BMFF container as `.m4a`/`.m4b`, just with the generic extension (`ftyp isom`, audio-only). Today those releases: 1. show up in Prowlarr search results with **no format chip** — only the generic "Audiobook" icon, because no format could be inferred; 2. download successfully; then 3. fail post-processing with **"No book files found in download"**, because `.mp4` isn't in `AUDIOBOOK_FORMATS` (`shelfmark/core/utils.py`). Real example: MAM #627978, *The Martian* (Andy Weir, 2020 edition) — 142 files `0001 … 0142 Andy Weir (2020) The Martian.mp4` + `cover.jpg`, 305 MB. Every file is a valid AAC-in-MP4 chapter. Adding `mp4` to `SUPPORTED_AUDIOBOOK_FORMATS` in `settings.json` doesn't help since the hard-coded tuple is what post-processing scans against. ## Change - Add `"mp4"` to `AUDIOBOOK_FORMATS` (single source of truth — settings UI, Prowlarr parsing, IRC parser, archive extraction and post-download scan all derive from it), with a comment explaining why. - Add `".mp4"` to the two hand-maintained debrid `_BOOK_EXTENSIONS` lists (AllDebrid / Real-Debrid) so file selection matches. - Slot `mp4` into the IRC `AUDIOBOOK_FORMAT_PRIORITY` table right after `m4a` (same container family). - Update the documented default in `docs/environment-variables.md`. - New regression test `test_audiobook_multifile_mp4_chapters_are_book_files` modelled on the existing multi-file usenet test. ### Note for existing installs The legacy-default migration only widens configs that still hold the old `m4b,mp3` list, so users on the current widened default won't pick up `mp4` automatically — they'll need to tick it in Settings → Audiobook formats. New installs get it by default. Happy to extend the migration if you'd rather it be automatic. ## Testing - `ruff check` / `ruff format --check`: clean - `pytest tests/core tests/config tests/irc tests/prowlarr tests/download -m "not integration and not e2e"`: 2296 passed, new test + `test_audiobook_format_consistency.py` all green. The 10 failures in `test_entrypoint_permissions.py` / `test_orchestrator_stall.py` reproduce identically on untouched `main` on macOS and are unrelated. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Fable 5 <noreply@anthropic.com>