# alass を Homebrew, scoop でインストール

alass のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。

## インストール

```sh
sudo av install brew:alass
```

追加のインストールコマンド:

### macOS

- Homebrew (100%):

```sh
brew install alass
```

  証拠: local Homebrew formula metadata

### Windows

- Scoop (92%):

```sh
scoop install main/alass
```

  証拠: Scoop official bucket manifest trees: bucket/alass.json from https://api.github.com/repos/ScoopInstaller/Main/git/trees/master?recursive=1

## パッケージ情報

- **パッケージキー:** brew:alass
- **パッケージマネージャ:** Homebrew
- **パッケージマネージャページ:** <https://formulae.brew.sh/formula/alass>
- **バージョン:** 2.0.0
- **ソース概要:** Automatic Language-Agnostic Subtitle Synchronization
- **ホームページ:** <https://github.com/kaegi/alass>
- **リポジトリ:** <https://github.com/kaegi/alass>
- **ライセンス:** GPL-3.0-or-later
- **ソースアーカイブ:** <https://github.com/kaegi/alass/archive/refs/tags/v2.0.0.tar.gz>
- **生成日時:** 2026-08-04T22:13:35+00:00

## 実行可能ファイル

- alass-cli (cli)
- alass-cli (エイリアス)

## ビルド依存関係

- rust

## インストール挙動

- post-install フック: 未定義
- Bottle: 利用可能 対象 arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, monterey, sonoma, ventura, x86_64_linux

## バージョンと鮮度

- ページ生成日: 2026-08-04
- マネージャ版: 2.0.0
- ローカルデータ: OK
- 上流リポジトリ: https://github.com/kaegi/alass
- 検出された最新: v2.0.0 (最新)
- 情報: No package-manager update timestamp was available.
## プロジェクトの歴史と使われ方

alass is a Rust command-line tool for Automatic Language-Agnostic Subtitle Synchronization. It aligns subtitle timing to a movie or to another subtitle file, correcting offsets, splits, and framerate differences without depending on the spoken language.

### プロジェクトの歴史

The public GitHub repository was created in February 2017. The README ties the algorithmic basis to the author's bachelor's thesis and presentation, and notes that the program was previously called `aligner` before being renamed to `alass` because the old name was hard to find in search engines.

The workspace is split into `alass-core`, the reusable algorithm library, and `alass-cli`, the official command-line tool for end users. That split lets downstream code reuse the synchronization algorithm while package managers expose the practical CLI.

### 採用の歴史

Official releases provide Windows and Linux executables, while source builds use Rust and Cargo. The supplied package-manager facts show distribution through Homebrew as `alass` and Scoop as `main/alass`.

The tool's adoption sits in the media-maintenance niche: users with mismatched subtitle files, different cuts, advertisement breaks, or framerate drift can run a local binary instead of manually editing subtitle timestamps.

### 使われ方

Basic use is `alass movie.mp4 incorrect_subtitle.srt output.srt`, or using a reference subtitle instead of a video file. For video references, `ffmpeg` and `ffprobe` are used to extract audio, with paths overridable through `ALASS_FFMPEG_PATH` and `ALASS_FFPROBE_PATH`.

The README documents tuning with `--split-penalty` and a faster `--no-splits` mode when only a constant shift is desired. Supported subtitle formats include `.srt`, `.ssa`, `.ass`, and `.idx`, while common video formats are supported through FFmpeg.

### パッケージ好きにとっての重要性

alass is a neat package-manager specimen because it wraps a specialized media algorithm into a normal CLI install. The package saves users from compiling a Rust workspace and C voice-activity component just to fix one badly timed subtitle file.

It also shows the recurring package-manager pattern where the executable name differs from the crate/workspace internals: Homebrew users get `alass-cli`, while the human-facing project name remains simply `alass`.

### タイムライン

- 2017: Public GitHub repository created.
- Initial project period: README documents the bachelor's thesis and presentation behind the algorithm.
- Later: Project renamed from `aligner` to `alass` for searchability.
- 2023: Repository metadata shows continued activity into late 2023.

### Related projects

- alass-core: reusable library crate containing the synchronization algorithm.
- alass-cli: official command-line tool for end users.
- FFmpeg and ffprobe: external tools used by alass to extract audio from video references.

### ソース

- <https://api.github.com/repos/kaegi/alass>
- <https://github.com/kaegi/alass>
- input source_facts.package-manager


## セキュリティノート

broad file, network, media, or database tool signal.

- **Geiger リスク:** blue / 中
- broad file, network, media, or database tool signal

## ソースデータベース詳細

- **Source Database:** Homebrew formula API
- **Tap:** homebrew/core
- **Full Name:** alass
- **Version Scheme:** 0
- **Revision:** 0
- **Bottle Stable Root URL:** <https://ghcr.io/v2/homebrew/core>
- **Deprecated:** no
- **Disabled:** no
- **Keg Only:** no
- **URL Keys:** stable

## 他のパッケージマネージャ記録

- Scoop - main/alass: normalized package name match | Scoop official bucket manifest trees: bucket/alass.json from https://api.github.com/repos/ScoopInstaller/Main/git/trees/master?recursive=1


## 関連リンク

- [Source-control packages](https://pkg.so/ja/source-control-tools/) - Belongs to a source-control command family.
- [Secret-risk packages](https://pkg.so/ja/secret-risk-packages/) - Has protected-tool coverage, approval-gate, or non-low Geiger security signals.
- [Terminal utility packages](https://pkg.so/ja/terminal-utilities/) - Matched terminal and command-line workflow metadata.
- [Language runtime packages](https://pkg.so/ja/language-runtime-packages/) - Matched language runtime, compiler, or interpreter metadata.
- [rust](https://pkg.so/ja/brew/rust/) - Build dependency declared by Homebrew.
- [mpv](https://pkg.so/ja/brew/mpv/) - Shares pkgdb curated category or tags: cli, media, subtitles, video.
- [mplayer](https://pkg.so/ja/brew/mplayer/) - Shares pkgdb curated category or tags: cli, media, subtitles, video.
- [ccextractor](https://pkg.so/ja/brew/ccextractor/) - Shares pkgdb curated category or tags: cli, media, subtitles, video.
- [ffmpeg](https://pkg.so/ja/brew/ffmpeg/) - Shares pkgdb curated category or tags: cli, media, video.
- [dav1d](https://pkg.so/ja/brew/dav1d/) - Shares pkgdb curated category or tags: cli, media, video.
- [aom](https://pkg.so/ja/brew/aom/) - Shares pkgdb curated category or tags: cli, media, video.
- [libvmaf](https://pkg.so/ja/brew/libvmaf/) - Shares pkgdb curated category or tags: cli, media, video.
- [yt-dlp](https://pkg.so/ja/brew/yt-dlp/) - Shares pkgdb curated category or tags: cli, media, video.
- [srt-parser-2](https://pkg.so/ja/npm/srt-parser-2/) - Both packages work with overlapping file formats or content types. Shared terms: cli, media, subtitle, subtitles, video.
- [next-video](https://pkg.so/ja/npm/next-video/) - Both packages work with overlapping file formats or content types. Shared terms: automatic, cli, media, video.
- [ab-av1](https://pkg.so/ja/brew/ab-av1/) - Both packages work with overlapping file formats or content types. Shared terms: cli, media, video.

## Combined YAML source

View the package source record on GitHub. [combined/alass.yml](https://github.com/mxcl/pkgdb/blob/main/combined/alass.yml)


## ソース

- pkg.so package database
- Geiger risk classifier
- package-page enrichment
- curated package history
- package version freshness
- pkgdb category and tag curation
- package relationship graph
- external package-manager database matches
- cross-ecosystem install command graph