rewindDV

<p align="center"> <img src="assets/rewinddv-icon.png" alt="rewindDV cassette app icon" width="180" height="180"> </p> <h1 align="center">rewindDV</h1> <p align="center"><strong>Preserve the tape. Inspect the evidence.</strong><br>Native FireWire DV/HDV preservation for modern macOS.</p> <p align="center"> <a href="https://github.com/rewinddv/rewindDV/releases">Engineering releases</a> · <a href="INSTALL.md">Install</a> · <a href="COMPATIBILITY.md">Compatibility</a> · <a href="https://github.com/rewinddv/rewindDV/issues">Report a result</a> · <a href="BUILDING.md">Build</a> · <a href="CONTRIBUTING.md">Contribute</a> </p> rewindDV brings tape acquisition, native DV playback, metadata inspection and preservation evidence into one Mac workspace. This repository contains the application and driver source, engineering downloads, documentation, issues and contributions. Visit [rewinddv.com](https://rewinddv.com) for the project website. <!-- project-status:start --> **Current development:** Alpha 0.0.93 / Driver B190. App build 188. [Reviewed public source](https://github.com/rewinddv/rewindDV/tree/482cf2fcdee763535dd5e69a658886accce20f36). **Latest public download:** [Alpha 0.0.93 / Driver B190](https://github.com/rewinddv/rewindDV/releases/tag/alpha-0.0.93) — engineering prerelease, ad-hoc signed and not notarized. Driver installation requires disabling SIP, which reduces macOS security. Offline playback, Surgery and inspection require no driver activation. Development source and bounded tests do not approve a new download. Application versions and driver builds advance independently. [Machine-readable status](PROJECT-STATUS.json). <!-- project-status:end --> ## Download and install Choose an engineering prerelease from [Releases](https://github.com/rewinddv/rewindDV/releases) and verify its attached ZIP against its checksum. Read [installation](INSTALL.md) and [removal, rollback and security restoration](UNINSTALL.md) before proceeding. **The current engineering binaries are ad-hoc signed and not notarized. Installation requires disabling System Integrity Protection (SIP), which reduces macOS security.** They are intended for experienced users and dedicated test systems. Developer ID signing, notarization and normal SIP-on distribution remain future work. These releases are not a production-readiness claim. Application version, source revision and driver build are separate identities. [Release notes](RELEASE-NOTES.md) record the available releases and withdrawal status. Historical LAB tags still point to their original hub snapshots: their automatic “Source code” archives are not the corresponding application source. See [release provenance and future releases](RELEASING.md). ## Preserve and inspect - Manual ingest and whole-tape capture retain received bytes and transport evidence. Missing timecode or a blank stretch alone does not establish end-of-tape. - Live monitoring and bounded deck controls support the tested DV workflow. - Saved raw DV playback supports offline-validated NTSC/PAL transitions, seeking, frame stepping and source-frame inspector values. Preview controls do not rewrite captured media. - Frame-local file opening and latest-request scrubbing avoid automatic full-file indexing. Exact coordinates remain an explicit scan, and preview estimates stay labeled. Mixed-format inspector association remains an open issue. - [Native CLI and 66 local MCP tools](Foundation/CLIAndMCP.md) control playback, Surgery and offline review through the running app's operation guards. External sandbox paths require a GUI grant for the current session. - Metadata, tape maps, reports and recovery tools preserve unknown, invalid and conflicting observations. Recovery derivatives remain separate from originals. - Local diagnostic evidence helps investigate failures without automatically uploading footage or logs. Matching saved-byte hashes do not prove pristine pictures or sound, lossless transport or successful recovery. Preserve original tapes and acquisition evidence. ## Compatibility and limits Apple silicon is the supported architecture; Intel is unsupported. The app's deployment floor is macOS 26 and source builds use Xcode 27. Bounded runtime evidence covers macOS 27.0.1, NTSC DV and one Sony HVR-M15U setup using the supported PCI 11c1:5901 controller and tested adapter chain. Broader OS, deck, adapter and storage compatibility, physical PAL/HDV capture, HDV playback and full-length endurance remain unqualified. Offline source and exporter tests do not extend hardware qualification. The packaged ad-hoc releases have not been installed or newly physically qualified. See [compatibility](COMPATIBILITY.md) and [known limitations](KNOWN-LIMITATIONS.md). No RECORD or tape-erasure control is provided. ## Report, build and contribute Use [issues](https://github.com/rewinddv/rewindDV/issues) for sanitized bug reports and compatibility results. The [test report](TEST-REPORT.md) and issue template ask for the app version, driver build, hardware route and observed result. **Do not attach support ZIPs, raw logs, private footage, personal paths or device identifiers publicly.** Request a private transfer channel first; see [privacy and support](PRIVACY.md). Public project contact: info@rewinddv.com. Start with [building](BUILDING.md), [offline testing](TESTING.md) and [contributing](CONTRIBUTING.md). The application lives under `Foundation/` and uses selected root `ASFWDriver/` dependencies. An unsigned source build does not install or activate a driver. [Source provenance](SOURCE-PROVENANCE.txt) records the imported source identities. ## Attribution and support rewindDV builds on modified [ASFireWire](https://github.com/mrmidi/ASFireWire) and selected adaptations from MediaInfoLib, DVRescue and video-tools. First-party software uses Apache-2.0; retained portions preserve their Apache, BSD and MIT terms. Read [LICENSE](LICENSE), [NOTICE](NOTICE), [third-party notices](ThirdPartyNotices.txt), [acknowledgments](ACKNOWLEDGMENTS.md) and [license texts](licenses/). No upstream endorsement or project trademark rights are implied. The generic source-build icon is intentional. [Support rewindDV on Ko-fi](https://ko-fi.com/rewinddv). Funds raised go toward purchasing IEC standards to research tape metadata and expand what rewindDV can decode. Support does not buy guaranteed compatibility, recovery, Apple approval or a release date; purchased standards are not redistributed.