* chore(deps): update subby to 0.3.27
* fix(subs): add WVTT (WebVTT in MP4) subtitle converter for subby
- Use WVTTConverter if self.codec == Subtitle.Codec.fVTT
- Read or save files as Paths instead of strings to avoid AttributeErrors
- Add CommonIssuesFixer when stripping SDH
- Set Subtitle.Codec.fVTT to use subby if conversion_method == "auto"
- Silence the underlying srt library logging used by subby to avoid info messages being printed to console
Session keys from master playlists often contain PSSHs with multiple KIDs covering all tracks, causing licensing to return keys for wrong KIDs.
Changes:
- Unified DRM licensing logic for all downloaders
- Prefer media playlist EXT-X-KEY tags which contain track-specific KIDs
- Add filter_keys_for_cdm() to select keys matching configured CDM type
- Add get_track_kid_from_init() to extract KID from init segment with fallback to drm.kid from PSSH
- Track initial_drm_key to prevent double-licensing on first segment
- Simplify n_m3u8dl_re block to reuse common licensing flow
- Use strict PlayReady keyformat matching via PR_PSSH.SYSTEM_ID URN instead of loose substring match
- Fix PlayReady keyformat comparisons that incorrectly compared strings to PlayReadyCdm class
- Fix byterange header format in get_track_kid_from_init() to use HLS.calculate_byte_range()
Also fixes PlayReady keyformat matching in:
- unshackle/core/tracks/track.py
- unshackle/core/drm/playready.py
Fixes download failures where track_kid was null or mismatched, causing wrong content keys to be obtained during PlayReady/Widevine licensing.
- Use lowercase format names (subrip, webvtt, advancedsubstationalpha) to match SubtitleEdit 4.x CLI requirements
- Change /Convert to /convert for consistency with CLI docs
- Convert Path objects to strings explicitly for subprocess calls
- Respect conversion_method config in SDH stripping - skip SubtitleEdit when user has set pysubs2/pycaption/subby as their preferred method
- Add stderr suppression to SubtitleEdit calls
Some services use WebVTT files with:
- Cue identifiers (Q0, Q1, etc.) before timing lines that pysubs2/pycaption incorrectly parses as subtitle text
- Multi-line subtitles split into separate cues with 1ms offset times and different line: positions (e.g., line:77% for top, line:84% for bottom)
Added detection and sanitization functions:
- has_webvtt_cue_identifiers(): detects cue identifiers before timing
- sanitize_webvtt_cue_identifiers(): removes problematic cue identifiers
- has_overlapping_webvtt_cues(): detects overlapping cues needing merge
- merge_overlapping_webvtt_cues(): merges cues sorted by line position
The previous regex only matched negative size values when they were the entire quoted attribute (e.g., "-5%"). This failed for multi-value attributes like tts:extent="-5% 7.5%" causing pycaption parse errors.
The new pattern matches negative values anywhere in the text and preserves the unit during replacement.
Closes#47
Add PlayReady PSSH/KID extraction from track and init data with CDM-aware ordering. When PlayReady CDM is selected, tries PlayReady first then falls back to Widevine. When Widevine CDM is selected (default), tries Widevine first then falls back to PlayReady.
- Add Primaries.Unspecified (value 2) per user request and H.273 spec
- Rename Primaries value 0 from Unspecified to Reserved for spec accuracy
- Rename Transfer value 0 from Unspecified to Reserved for consistency
- Simplify Transfer value 2 from Unspecified_Image to Unspecified
- Update condition check to use enum values instead of numeric tuple
- Enhance docstring with detailed sources and rationale for changes
All CICP values verified against ITU-T H.273, ISO/IEC 23091-2, H.264/H.265 specifications, and FFmpeg AVColorPrimaries/AVColorTransferCharacteristic enums.
PR #38 refactored n_m3u8dl_re track selection to support DASH/ISM subtitle tracks, but this broke some subtitle downloads. Services that use direct URL downloads (Descriptor.URL) for subtitles, which n_m3u8dl_re does not support.
Add preserve_formatting config option to prevent automatic subtitle processing that strips formatting tags and styling. When enabled (default: true), WebVTT files skip pycaption read/write cycle to preserve tags like <i>, <b>, positioning, and other formatting.
New --exact-lang CLI flag that enables exact language code matching instead of fuzzy matching. This allows users to get specific regional variants without matching all related variants.
Examples:
- `-l es-419` normally matches all Spanish (es-ES, es-419, es-MX)
- `-l es-419 --exact-lang` matches ONLY es-419 (Latin American Spanish)
Fixes language detection issue where specific variants like es-419 (Latin American Spanish) would match all Spanish variants instead of just close regional variants.
- Add pysubs2 as default conversion method for 'auto' mode
- Add support for MicroDVD (.sub), MPL2 (.mpl2), and TMP (.tmp) formats
- Implement convert_with_pysubs2() method with fallback to standard conversion
- Update from_mime() to handle new subtitle format types
- Map all supported formats to pysubs2 format identifiers
- Update docstrings to reflect new capabilities
Add new session utility with curl_cffi support for anti-bot protection
Update all manifest parsers (DASH, HLS, ISM, M3U8) to accept curl_cffi sessions
Add browser impersonation support (Chrome, Firefox, Safari)
Fix cookie handling compatibility between requests and curl_cffi
Suppress HTTPS proxy warnings for better UX
Maintain full backward compatibility with requests.Session
- Add intelligent embedded audio language detection at mux stage
- Automatically set audio language metadata when no separate audio tracks exist
- Respect user flags (-V, --no-audio) to avoid unnecessary processing
- Smart video track selection based on title language with fallbacks
- Improved default track selection to prioritize title language matches
- Enhanced FFmpeg repackaging with audio stream metadata injection
- Works automatically for all services without service-specific code
The Transfer enum was missing value 2, which according to ITU-T H.Sup19 standards represents "Unspecified (Image
characteristics are unknown or are determined by the application)". This value is often used for still image coding systems.
* Introduced `MKVToolNix` and `mkvpropedit` binaries to the project.
* Updated the environment check to include required status for dependencies.
* Enhanced the `Tracks` class to raise an error if `MKVToolNix` is not found.
* Modified the `_apply_tags` function to utilize the `mkvpropedit` binary from the binaries module.
