Motion Previs Studio v4.1.0-windows.2 — Unofficial Gumbii Community Build

Motion Previs Studio v4.1.0-windows.2 — Unofficial Gumbii Community Build

This unsigned Windows 11 x64 prerelease fixes analysis preparation for iPhone
MOV files that contain an auxiliary Apple Spatial Audio (apac) stream.

Fixed

• Preserve the primary AAC audio mix without requesting the optional apac
  stream that the bundled FFmpeg cannot decode.
• Normalize unsigned Windows media-tool exit codes and show the useful final
  diagnostic lines instead of the long FFmpeg build banner.
• Add a generated regression that proves the old broad audio mapping fails and
  the fixed primary-audio mapping succeeds.

The problem was not caused by 4K resolution, portrait/landscape aspect ratio,
computer performance, or a missing system FFmpeg installation.

Verification

• Full repository verification and Electron end-to-end export passed.
• Native Windows and macOS GitHub E2E jobs passed.
• The iPhone Spatial Audio regression and production build passed on a physical
  Windows 11 x64 laptop using the same audited bundled FFmpeg.
• The NSIS installer passed package-layout, unpacked launch, per-user install,
  launch, uninstall, runtime-asset, and community-identity checks.
• SHA-256 checks, SPDX/CycloneDX SBOMs, provenance, licenses, and FFmpeg
  corresponding source are attached.

Unsigned prerelease

The installer is not code-signed. Windows SmartScreen may display an
unknown-publisher warning. Verify SHA256SUMS, then use More info → Run
anyway only if you trust this build. Auto-update is not enabled.

Motion Previs Studio remains Apache-2.0 with Sam Wasserman's original credit.
Bundled FFmpeg/FFprobe are separate GPL-3.0-or-later components.

Motion Previs Studio v4.1.0-windows.1 — Unofficial Gumbii Community Build

Motion Previs Studio v4.1.0-windows.1 — Unofficial Gumbii Community Build

This is an unofficial, open-source Windows 11 x64 prerelease maintained by
Gumbii Digital. It uses a distinct application ID and data directory so it
cannot overwrite a future official Motion Previs Studio Windows release.

Included

• Native Windows window chrome and a per-user assisted NSIS installer.
• Local-file and controlled-HTTP imports with packaged FFmpeg/FFprobe and
  yt-dlp; no system media tools are required.
• Bundled, pinned MediaPipe pose assets; production bundles contain portable
  relative filenames and support relinking missing external media.
• Depth Anything is downloaded on first use from pinned revision
  2e942621ab9f2371c1df9eb223291b5ac31475e6; the certified fallback path is
  CPU/WASM execution when no WebGPU adapter is available.
• Windows-safe path canonicalization, junction-escape protection, explicit
  cancellation, and process-tree cleanup.
• Packaged MCP bridge and the versioned Motion-to-Blockout handoff contract.
• SPDX and CycloneDX SBOMs, checksums, asset/model manifests, notices, build
  provenance, and corresponding source for the bundled FFmpeg component.

Unsigned prerelease

The installer is not code-signed. Windows SmartScreen may show an
unknown-publisher warning. Verify the published SHA-256, then use
More info → Run anyway if you trust this build. Auto-update is not enabled.

Motion Previs Studio source remains under Apache-2.0 with the original Sam
Wasserman attribution. Bundled FFmpeg/FFprobe are separate GPL-3.0-or-later
components; their license, provenance, checksums, and corresponding source are
included with this release.