crates/codecs decodes Opus with filmcraft-opus (48 kHz output):
- Matroska/WebM A_OPUS: CodecPrivate = OpusHead. CodecDelay removes the
pre-skip exactly (header pre-skip when CodecDelay is absent); packet starts
are accumulated from TOC durations because block timestamps are only
tick-accurate. Random access decodes max(SeekPreRoll, 320 ms) first.
- MP4/MOV Opus + dOps: edit list removes pre-skip (dOps pre-skip without
one); same pre-roll on random access.
- Family-1 surround reordered from Vorbis to WAV/SMPTE channel order;
corrupt packets are concealed instead of failing.
Tests (ffmpeg/libopus fixtures, skipped when absent): WebM stereo, MKV mono
VoIP (SILK/hybrid), MKV 5.1 multistream, MP4 stereo; sample-aligned against
libopus (52-89 dB sequential, 45-89 dB after random access).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Public equivalents of the maintainer-local plan/: docs/architecture.md (layers as enforced by
xtask, Tick time base, data model, command system and undo, render/playback/export pipeline,
automation surfaces), docs/contributing.md (+ root CONTRIBUTING.md), docs/testing.md and
docs/agents.md (MCP/control channel usage, agent work loop, decision rules, Definition of Done).
CLAUDE.md points at the public docs wherever it references plan/; AGENTS.md gains a See also list;
README gains a Documentation section.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Brandon Thomas