!!top!!: Osu Replay Viewer

.osr files are data logs, not videos. Replay viewers can render these files into MP4 or WebM formats at high framerates (60FPS to 600FPS) for YouTube or TikTok.

If you want to watch replays without opening the full game client, several community projects offer lightweight alternatives. osu replay viewer

input[type="range"] width: 100%; height: 4px; -webkit-appearance: none; background: #2a3a55; border-radius: 5px; outline: none; replays like abstract performance art

// Draw dotted grid (osu! style) ctx.strokeStyle = '#2a3b55'; ctx.lineWidth = 0.5; for (let i = 0; i < canvas.width; i += 40) ctx.beginPath(); ctx.moveTo(i, 0); ctx.lineTo(i, canvas.height); ctx.stroke(); ctx.beginPath(); ctx.moveTo(0, i); ctx.lineTo(canvas.width, i); ctx.stroke(); and the rhythm of the hit.

There’s a niche subculture of “replay visualizers” on YouTube. They strip the UI away, add motion blur, and present osu! replays like abstract performance art. One video, titled “Cookiezi - Freedom Dive [4D] LIVE 2013” , has 2 million views. It’s just a replay. But the comments read like poetry: “You can see him breathe here.” “This is what flow state looks like.”

To the uninitiated, an osu! replay is simply a recording of a match. But unlike a standard video file (like an MP4), an osu! replay file ( .osr ) is remarkably lightweight. It doesn’t store video frames; it stores data. It records the X/Y coordinates of the cursor, the precise millisecond a key was pressed, and the rhythm of the hit.