alass を Homebrew, scoop でインストール

プロジェクトリンク

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コマンドとエイリアス

• alass-cli

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