* fix: MKV subtitle track .(null) extension for KATE and unknown codec IDs
The matroska_track_text_subtitle_id_extensions array had 7 entries for
an 8-value enum, leaving MATROSKA_TRACK_SUBTITLE_CODEC_ID_KATE (index 7)
out of bounds. On most platforms this read NULL, which then caused
strlen(NULL) UB and snprintf to emit .(null) in the output filename.
Two fixes:
- Add "kate" at index 7 in the extensions array so KATE tracks
produce correct .kate output filenames
- Add a NULL guard in generate_filename_from_track() so any future
unknown codec ID safely falls back to .bin instead of crashing or
producing .(null)
Fixes#972
* fix: MKV subtitle track .(null) extension for KATE and unknown codec IDs
The matroska_track_text_subtitle_id_extensions array had 7 entries for
an 8-value enum, leaving MATROSKA_TRACK_SUBTITLE_CODEC_ID_KATE (index 7)
out of bounds. On most platforms this read NULL, which then caused
strlen(NULL) UB and snprintf to emit .(null) in the output filename.
Two fixes:
- Add "kate" at index 7 in the extensions array so KATE tracks
produce correct .kate output filenames
- Add a NULL guard in generate_filename_from_track() so any future
unknown codec ID safely falls back to .bin instead of crashing or
producing .(null)
Fixes#972
* fix: MKV subtitle track .(null) extension for KATE and unknown codec IDs
The matroska_track_text_subtitle_id_extensions array had 7 entries for
an 8-value enum, leaving MATROSKA_TRACK_SUBTITLE_CODEC_ID_KATE (index 7)
out of bounds. On most platforms this read NULL, which then caused
strlen(NULL) UB and snprintf to emit .(null) in the output filename.
Two fixes:
- Add "kate" at index 7 in the extensions array so KATE tracks
produce correct .kate output filenames
- Add a NULL guard in generate_filename_from_track() so any future
unknown codec ID safely falls back to .bin instead of crashing or
producing .(null)
Fixes#972
---------
Co-authored-by: Dhanush Varma <your@email.com>
MKV files with MPEG-2 video (common in DVD sources) were silently skipped.
Add V_MPEG2 track detection and processing using the existing process_m2v()
infrastructure, matching how mp4.c handles MPEG-2 streams.
Fixes#2149
Previously, CCExtractor would only print "Error: VOBSUB not supported"
when encountering VOBSUB (S_VOBSUB) subtitle tracks in Matroska files.
This left users without any usable output.
This commit adds full VOBSUB extraction support:
- Generate proper .idx index files with timestamps and file positions
- Generate proper .sub files with PS-wrapped SPU data
- Correct PS Pack header with SCR derived from timestamps
- Correct PES header with PTS for each subtitle
- 2048-byte block alignment (standard VOBSUB format)
The output is compatible with VLC, FFmpeg, and other players that
support VobSub subtitle format.
Tested with sample from issue #1371 - output validates correctly
with FFprobe and produces identical subtitle data to mkvextract.
Fixes#1371🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Extends HEVC caption extraction support to MKV files.
Changes to matroska.h:
- Add hevc_codec_id constant for V_MPEGH/ISO/HEVC
- Add hevc_track_number field to matroska_ctx structure
- Add process_hevc_frame_mkv() function declaration
Changes to matroska.c:
- Detect HEVC tracks in parse_segment_track_entry()
- Modify parse_simple_block() to route HEVC tracks to HEVC processor
- Add process_hevc_frame_mkv() with is_hevc flag and store_hdcc() call
- Parse HEVCDecoderConfigurationRecord in parse_private_codec_data()
- Initialize hevc_track_number in matroska_loop()
- Update output messages to report HEVC tracks
Tested with HEVC MKV file - extracts 73 captions matching MP4 output.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Apply clang-format to all C/H files in src/
- Apply cargo fmt to Rust code
- Update Cargo.lock with latest compatible dependency versions
- Add 24 new entries to CHANGES.TXT for recent fixes and features
Changes in CHANGES.TXT cover:
- CEA-708 bounds checks and UTF-16BE encoding fixes
- New --ttxtforcelatin option for Teletext
- TS files without PAT/PMT fallback support
- Timing accuracy improvements across MP4/MPEG/TS
- Memory safety improvements (null checks, buffer overruns)
- Multi-file processing fixes
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
* [FIX] Fix incorrect comparison of strings for AVC codec id in .mkv
* Initial work on adding DVB support to .mkv
* [REQUEST] Finished adding support for DVB inside MKV (#1000)
* Update CHANGES.TXT
