# taurusxin/ncmdump

转换网易云音乐 ncm 到 mp3 / flac. Convert Netease Cloud Music ncm files to mp3/flac files.

Repository: https://github.com/taurusxin/ncmdump
Canonical: https://ross.abutalabs.com/products/ncmdump
Language: C++
License: MIT
License Family: permissive
Last push: 2026-08-20T12:21:13+00:00

## Health v2 (maintenance only)
Score: 70/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 98, release rhythm 18, longevity 100
- inputs: {"age_days": 1792, "days_push": 13, "days_rel": 332, "gap_med": 193.0, "n_releases_24m": 3}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4404, forks 509 (observed 2026-08-28T04:08:48.357641+00:00)

## What it is
A cross-platform C++ command-line tool that converts Netease Cloud Music .ncm cached files into standard mp3 or flac audio files. It also builds a shared library (libncmdump) so other languages like C#, Python, and Java can call the conversion functionality.

## Use cases
- convert ncm files to mp3 or flac
- batch convert a folder of ncm files
- recursively convert ncm files in nested directories
- convert ncm files with Chinese or emoji filenames
- embed ncm conversion into another application via a dll

## When to choose
- you have Netease Cloud Music ncm downloads you want as standard audio files
- you need a fast, dependency-light CLI for batch ncm conversion
- you want a library to integrate ncm decryption into your own app

## When to avoid
- your ncm files lack embedded album art and you need automatic cover fetching from the network
- you prefer a graphical interface over the command line
- you need a maintained Go implementation instead of C++

## Facets
- artifact type: cli-tool
- maturity: active
- function: cli, file-system, audio-processing
- domain: media, files, developer-tools
- platform: windows, cli, cross-platform
- tags: ncm, netease-cloud-music, audio-conversion, drm-decryption, mp3, flac, taglib, linux, macos

## Member repositories
- taurusxin/ncmdump (main) score 70

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:48.357641+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 2026-08-29T18:21:06.987137+00:00, confidence not recorded.
  - readme: https://github.com/taurusxin/ncmdump (fetched 2026-08-28T04:08:48.357641+00:00, sha 4826da781f22)
- Data as of 2026-08-30T08:39:29.467469+00:00.