- Fix write_size test: 127 encodes as [0x40, 0x7F] not [0xC0, 0x7F] - Mark doc examples as ignore (use incomplete pseudo-code)
- Remove unused NAL_SLICE and NAL_SEI constants from h264 parser - Remove unused aacs import from Disc::scan()
- Add event.rs: structured event system for progress reporting - Add mux/: MKV muxer pipeline (EBML writer, TS demuxer, stream assembly) - Codec parsers: H.264, HEVC, AC-3, DTS, TrueHD, PGS, VC-1 - Lookahead buffer for codec private data extraction - Direct m2ts-to-MKV streaming without intermediate files