flake.lock                          |   8 +-
 flake.nix                           |  10 +-
 framework/lib/async.ts              | 129 +++++++
 framework/lib/lru.ts                |   2 -
 framework/lib/path.ts               | 149 +++++++-
 framework/lib/subprocess.ts         |  43 +++
 src/file-viewer/bin/scan3.ts        | 595 ++++++++++++++++++++------------
 src/file-viewer/ffmpeg.ts           |  28 +-
 src/file-viewer/models/AssetRef.ts  |  73 ----
 src/file-viewer/models/MediaFile.ts |   2 +
 src/file-viewer/models/derived.ts   | 157 +++++++++
 src/file-viewer/rules.ts            |   2 +-
 src/file-viewer/transcode-rules.ts  | 285 ++++++++++-----
 13 files changed, 1076 insertions(+), 407 deletions(-)