Osu Replay Viewer ^hot^

More Than Just a Ghost: Inside the osu! Replay Viewer

The .osr file format is tiny because it doesn't contain video; it only contains data points. To share your play on YouTube or Reddit:

osu!lazer (Built-in)

: The modern official client includes a vastly improved replay system with playback speed controls and a scrub bar , though it still lacks deep "pixel-level" analysis. osu replay viewer

These tools go beyond the standard game client to help you understand why you missed a note or how your accuracy (UR) fluctuates. More Than Just a Ghost: Inside the osu

• osu! players who want to review and improve their aim, timing, and combo management
• Content creators needing clips or visuals of plays
• Community moderators or mappers verifying replays

Step 1: The 3-Speed Analysis

function resetReplay() pauseReplay(); setCurrentTime(0); you hover over the small

• Negative timestamps – indicates absolute time, must reset delta calculation.
• Mods – Nightcore changes timing; Relax changes keypress data.
• Slider tracking – requires beatmap slider bezier math.
• LZ4 compression – older osu! uses zlib, new uses LZ4.
• String offsets – Strings are stored as [len (ULEB128)] + [UTF-8 bytes].

You’ve just set a new personal best on a 7-star Freedom Dive map. Your hands are shaking. The cursor wavers on the “Retry” button—but you don’t click it. Instead, you hover over the small, unassuming button: Watch Replay .