# anthwlock/untrunc

Restore a truncated mp4/mov. Improved version of ponchio/untrunc

Repository: https://github.com/anthwlock/untrunc
Canonical: https://ross.abutalabs.com/products/untrunc
Language: C++
License: GPL-2.0
License Family: copyleft
Last push: 2026-08-21T21:00:21+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 8, longevity 100
- inputs: {"age_days": 3011, "days_push": 12, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3386, forks 341 (observed 2026-08-28T04:07:58.758296+00:00)

## What it is
A command-line tool (with optional GUI) that repairs truncated or damaged MP4, M4V, MOV, and 3GP video files by using an intact reference video from the same device. It is an actively maintained, faster fork of ponchio/untrunc with support for large files, GoPro and Sony XAVC footage, and modern FFmpeg versions.

## Use cases
- repair a truncated mp4 video
- fix a broken mov file from a GoPro
- recover an unfinished video recording
- restore a corrupted 3gp video from a phone
- fix a video file that won't play because recording was interrupted
- repair a large mp4 over 2GB that got cut off

## When to choose
- you have both a broken video and a working reference video from the same camera/device
- you need to recover interrupted recordings from GoPro, Sony, drones, or phones
- you want a fast, maintained repair tool with Windows builds and Docker support

## When to avoid
- you have no intact reference video from the same device
- the video is corrupted in ways other than truncation
- you need a fully automatic one-click repair without a reference file

## Facets
- artifact type: cli-tool
- maturity: active
- function: video-processing, cli, gui
- domain: media, developer-tools
- platform: windows, cli, cross-platform
- tags: video-repair, truncated-mp4, ffmpeg, file-recovery, gopro, mov, video, linux, macos, docker

## Member repositories
- anthwlock/untrunc (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:58.758296+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:39:10.150728+00:00, confidence not recorded.
  - readme: https://github.com/anthwlock/untrunc (fetched 2026-08-28T04:07:58.758296+00:00, sha 329514340a1e)
- Data as of 2026-08-30T08:39:29.467469+00:00.