v4.0.0 (2026-08-16)

Release Notes

⚠ BREAKING CHANGES

• core: each layer has one scan entry point again, and it takes the observers. BdRom::open
  and BdRom::open_resilient take (root, mode, ScanOptions, scan_files, ScanObservers), and
  scan::open_folder / scan::open_iso take the same; the _with and _observed twins
  (open_with, open_observed, open_resilient_with, open_resilient_observed,
  open_folder_observed, open_iso_observed) are removed. Migration: call the plain name and pass
  the bundle — ScanObservers::none() where a caller has no progress callback, no cancel flag, and
  no measured observer, ScanObservers::new(&mut progress, &cancel) otherwise, plus
  .with_measured(&mut observer) for live snapshots. (#372)
• core: ClipSummary gains a measured: bool field recording whether the measurement pass
  demuxed that stream file, so a 0-byte or header-destroyed *.m2ts is reported as short rather
  than read as unscanned. Struct-literal construction of a ClipSummary therefore has to name it;
  building through fixtures::clip(…) does not. The browser package's Clip mirrors it as
  measured, additively on the wire. (#373)

Added

• core: a measured-snapshot observer on the scan API — the full pass emits per-stream byte
  tallies and bitrates at chunk boundaries while it reads, so a front-end can fill measured cells
  during the scan instead of waiting for the report. (#347, #348)
• gui: the playlist, stream-file, and codec grids tick their measured sizes and bitrates while
  the scan runs. (#349)
• wasm: onMeasured streams those snapshots to the page, throttled to at most one a second.
  (#350)
• wasm: the demo gains a light theme, chosen by an auto, light or dark setting; auto follows the
  operating system. (#381)
• wasm: the demo's scan lifecycle matches the desktop app's — scanning with nothing ticked scans
  every listed playlist rather than refusing, a cancelled or failed scan keeps the cells it measured
  until the next scan starts, a running scan freezes what names its scan set while the highlighted
  row and the live cells stay live, and the progress card carries elapsed and remaining times that
  climb through a stall instead of freezing. (#382)
• wasm: the demo gains a disc-info strip — disc title, detected features, disc size in bytes and
  in human-readable form, the hidden-tracks note, and the AACS indicator as a badge — plus a
  View report that renders the structural zero-bitrate report over the current selection before any
  measured scan, a source bar naming the loaded disc, a reveal on the filter hint, and Ctrl+C
  copying the highlighted row's disc-relative path. (#383)
• wasm: the demo's progress strip shows an indeterminate state until the scan's first event — a
  sweeping bar and a spinner where the percentage sits — instead of reporting a measurement it does
  not have yet. (#387)
• core: stream files whose bytes stop before the span the disc declares are detected and named.
  Such a file reads to a clean end of file, so nothing is recorded as a read error and every value
  measured from it is silently smaller than the disc says; the CLI raises one stderr notice per
  short file, the desktop app a banner, and the browser package disc.shortStreamNotices. The
  report bytes are unchanged. (#345, #346)

Performance

• core: a caller whose earlier Codecs open already read the codec detail can skip the quick
  codec pass (ScanOptions::skip_quick_pass), and can hand a prior open's AACS verdict to the next
  one (ScanOptions::aacs_encrypted) instead of re-probing. The desktop app uses both, so its
  measured scan no longer re-reads every stream file head — on damaged media each such read can
  stall for minutes. (#358)
• core: the demux reads 256 KiB per request in the full pass and 16 KiB in the quick pass, so a
  stalled read blocks for less and a cancel takes effect sooner. (#333)

Fixes

• core: a 3D clip whose BDMV/STREAM/SSIF/<clip>.ssif will not open is measured from the plain
  *.m2ts instead of being abandoned — the base view is reported, the dependent (MVC) row is not,
  and the failure is recorded against the .ssif in the WARNING block. (#363)
• core: three classic-parity corrections — an access unit's transfer interval is measured only
  on a forward PTS (a backwards step no longer drags the interval base back), undecoded MPEG-1/2
  and AAC audio rows fall back to the type-derived codec names instead of rendering an empty one,
  and each clip's share of its playlist is computed against the finished playlist length rather
  than the part accumulated so far. The first also reaches the playlist-level bitrate of a video
  stream, where it moves a short playlist's kbps by a few counts; a feature-length one is
  unchanged. See DIFFERENCES.md. (#364)
• core: the volume label of a disc mounted at a Windows drive root is read from the raw device
  before the scan instead of after it, so a scan that records a read error still names the disc
  — in the report body, in the BDINFO.<label>.txt file name, and in the desktop app's title —
  rather than degrading to the drive letter. The read is only attempted for an input path that can
  walk up to a nameless drive root, so an ordinary named folder costs no extra IO.
  (#341, #378)
• cli: the progress line repaints about once a second through a stalled read, switching its
  lead-in to Still scanning after five seconds, so a hung drive no longer looks like a hung
  program. (#366, #378)
• core: the remaining-time readout shows --:--:-- until the first bytes are measured, on both
  the command line and the desktop app, instead of 00:00:00 — which read as "about to finish" at
  the moment nothing had been read, and could stand there for minutes beside a stalled read.
  (#378)
• gui: deciding whether a path names a disc folder or an .iso image no longer reads the
  filesystem — the kind is taken from the path's spelling, and whether the path can be opened is
  answered by the listing worker. A source that has stopped answering (an unplugged drive, a share
  that is gone) therefore no longer freezes the window before it appears when it is the remembered
  last source, nor freezes a running window when it is dropped onto it; the stall lands on the
  worker, behind the scan overlay's Cancel. A path that is missing or is not a disc still reaches
  the same failure screen with the same message. (#379)
• gui: the disc-size line counts the interleaved *.ssif files, so a 3D disc no longer reads
  smaller in the info box than in the report the same window renders. The log line carrying that
  number moves with it. (#385)
• gui: the log records a stall clearing as well as a stall starting, the scan overlay no longer
  passes clicks and drags through to the table beneath it, the scan-notice modal stops referring to
  a report below it and says the report was generated rather than written, and a refused report save
  names the destination it tried. (#377, #384)
• gui: cancelling a scan keeps the values it measured on the grids, the selection stays live
  during a scan so the panes follow the highlighted row, and the remaining-time estimate climbs
  through a stall instead of freezing. (#365)
• gui: read errors from the listing pass reach the warning banner and the log — both structural
  opens' failures are merged and deduplicated — and gui.log keeps the previous launch as
  gui.log.1, stamps its launch time, and records stalls, disc identity, and scan durations.
  (#367)
• gui: the listing pass is cancellable and reports its progress, and the stall hint covers it.
  (#339, #342)
• wasm: a failed measured open is reported instead of rendering a report of zero tallies, scan
  errors are shown on the page, and a downloaded report is named from the scanned disc's volume
  label. (#336, #369)
• Plural nouns agree with their counts in the command-line, desktop, and browser messages.
  (#374)

Install bdinfo-rs 4.0.0

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/agentjp/bdinfo-rs/releases/download/v4.0.0/bdinfo-rs-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://github.com/agentjp/bdinfo-rs/releases/download/v4.0.0/bdinfo-rs-installer.ps1 | iex"

Install prebuilt binaries via Homebrew

brew install agentjp/tap/bdinfo-rs

Download bdinfo-rs 4.0.0

File	Platform	Checksum
bdinfo-rs-aarch64-apple-darwin.tar.gz	Apple Silicon macOS	checksum
bdinfo-rs-x86_64-apple-darwin.tar.gz	Intel macOS	checksum
bdinfo-rs-aarch64-pc-windows-msvc.zip	ARM64 Windows	checksum
bdinfo-rs-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
bdinfo-rs-aarch64-unknown-linux-musl.tar.gz	ARM64 MUSL Linux	checksum
bdinfo-rs-x86_64-unknown-linux-musl.tar.gz	x64 MUSL Linux	checksum

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo agentjp/bdinfo-rs

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>