Match once after every server manifest is parsed, and require range and bitrate in the video fallback, so a per-range ISM ladder no longer hands an HDR10 track the SDR quality level. Pass -xerror to the bsf ffmpeg calls so a failed rewrite keeps the original file instead of a near-empty one.
Init segments now carry dvcC/dvvC with a profile-keyed sample entry and the dby1 brand; track ids cover the manifest URL so per-range ladders stop colliding, and the remote path carries the Atmos flag without inventing a JOC count.
The client withheld nothing before: every profile's tokens went to any remote server. Filter by active-credential digests and profile names, keeping service-global files; worst case for a withheld file is a server-side re-auth.
Adds Track.drm_preference so a service can pin a track to Widevine or
PlayReady when a manifest advertises both but only one will license it.
Honoured in DASH/HLS selection, the dl licence path and the remote/API
track round-trip. Also fixes quality-keyed CDM maps sending audio to the
default entry, and a licence callable binding the CDM before the swap.
Renames 314 defs and 41 module/class-level constants. Keeps 11 names underscored where the stripped form collides in scope, plus 5.5.0 shims for the three symbols external service repos call.
Missing requested subtitle and audio languages now warn and continue when --best-available is set instead of hard-exiting. Without the flag, missing languages still produce an error and exit, matching the prior strict behavior. Audio missing-lang detection is now symmetric with subtitles.
- add find_missing_langs helper in core/utilities for reuse between s_lang and a_lang paths (skips all/best/orig sentinels)
- refactor dl.py s_lang/a_lang checks to share the helper
- add tests/lang_selection covering match primitives, helper output, and tricky langcodes corners (zh-Hans/zh-Hant/zh-CN/zh-TW/zh-HK, cmn/yue, fil/tl/tgl)
- clean up unused-var ruff F841 in tests/remote/unit/
Covers RemoteClient/RemoteService, REST routes, handlers, SessionStore, InputBridge, DownloadQueueManager, errors, compression, and serve CLI. E2e tier opts in via --live and can auto-spawn its own serve.
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