Henkan - About The reliable VSRG converter

General
1

Henkan 変換

A converter for osu!mania and Etterna / StepMania charts.

After trying pretty much every converter I could find, I noticed they all had the same problems: timing drifting, broken holds, missing BPM changes, or weird edge cases that made the output unusable.

So I made my own.

Henkan focuses on doing one thing properly: converting charts without changing how the original map plays.

What it does

  • Convert osu!mania (.osu / .osz) ↔ Etterna / StepMania (.sm)
  • Preserve BPM changes
  • Convert hold notes correctly
  • Keep metadata (title, artist, creator, difficulty, preview point)
  • Preserve background references
  • Fetch osu! avatars for cdtitle images in .sm files

A note about SV

SVs are not converted when exporting from osu!mania to .sm.

This isn’t a limitation of Henkan—StepMania’s .sm format simply doesn’t have an equivalent to osu!'s inherited timing points (green lines).

Screenshots

Main Interface

1102×782 48.9 KB

Pack Conversion

1102×782 211 KB

Etterna Conversion

1102×782 84.6 KB

osu! Conversion

1102×782 83.2 KB

Preview

1102×782 88.8 KB

Downloads

Source Code

GitHub Repository: GitHub - kaanreal/henkan: The reliable VSRG converter you asked for. · GitHub

Feedback, bug reports, and weird edge-case maps are always welcome.

3 Likes
2

While I’ve yet to check the tool, I want to mention that while .sm is incapable of doing arbitrary scroll changes, .ssc can. If osu maps allow for arbitrary map speed based on a multiplier of the BPM at any specific time (e.g. 0.6, 2, 0.31415), these should have a direct coorelation via our .ssc format.

1 Like
3

actually peak, this is beyond helpful and insanely easy

1 Like
4

I haven’t tried the program, but if it’s as good as they say, it would be great if this conversion system were used in Arrow Vortex. In addition to FoxFire’s suggestion about the scroll changes in .ssc

Arrow Vortex repo GitHub - uvcat7/ArrowVortex: Stepmania .sm/.ssc file development tool · GitHub

5

open website, upload nbjs 5 future dominators to convert to osu, download the result and instantly try to reupload the .osu, error

1 Like
6

I just tested the exact same file. There isn’t actually an error. When you upload a .sm file from a folder to the web version, it only receives the .sm file, so it can’t find the audio or any of the other required files. If you got the red error, it’s probably because you uploaded the .osu directly from the ZIP archive.

In the desktop version, converting from the song folder works because it has access to all the files automatically. I could probably add support for uploading ZIP files in the future, which would solve this.

7

i will look into it , ty