whatsthis

Pure Go library that guesses video metadata (title, year, codec, resolution, release group, etc.) from a filename. Zero dependencies. Inspired by the Python guessit project.

Installation

go get github.com/odwrtw/whatsthis

Usage

info := whatsthis.Video("Big.Buck.Bunny.2008.1080p.BluRay.x264-YIFY.mkv")
fmt.Println(info.Type)         // movie
fmt.Println(info.Title)        // Big Buck Bunny
fmt.Println(info.Year)         // 2008
fmt.Println(info.ScreenSize)   // 1080p
fmt.Println(info.VideoCodec)   // H.264
fmt.Println(info.ReleaseGroup) // YIFY
fmt.Println(info.Container)    // mkv

Use File as the general entry point for extensionless release names and video files. It recognizes whole-season names before falling back to Video:

info := whatsthis.File("Velvet Meridian 2026 Season 1 Complete 1080p WEB x264 [theta_group]")
fmt.Println(info.Type)    // show_season
fmt.Println(info.Title)   // Velvet Meridian
fmt.Println(info.Season)  // 1
fmt.Println(info.Episode) // 0

WebAssembly demo

The static web interface runs whatsthis.File entirely in the browser; names are not uploaded anywhere.

Try it at odwrtw.github.io/whatsthis.

Build it with the repository's Go version:

./scripts/build-web.sh

Then serve dist with any static HTTP server and open index.html. The generated directory contains the site assets, the WebAssembly binary, and the matching wasm_exec.js from the local Go toolchain.

Pushes to master deploy the site through GitHub Actions. To enable deployment, select GitHub Actions as the source under Settings → Pages in the repository.