: Some external viewers allow you to see exact hit error (UR) and "slider-end" timing to see exactly where you lost accuracy. ⚠️ Common Troubleshooting
: It overlays real-time input overlays, calculates unstable rate (UR) dynamically throughout the map, tracks cursor variance, and highlights exactly where click errors occurred.
You can use Circleguard simply by clicking the "Visualization" panel to watch your own replays. It provides a detailed UR bar and judgment indicators (green dots for 100s, blue for 50s, red for misses), allowing you to see exactly where you lost accuracy. You can also jump to any point, speed up or slow down playback, and even move frame by frame.
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For classic osu! stable, rendering a high-quality video requires external tools:
In the rhythm gaming community, "proof" is everything. For the better part of the last decade, the circle-clicking phenomenon osu! has been defined not just by the songs players beat, but by how they beat them. At the heart of this culture lies a deceptively simple piece of software: the .
Simply watching your replays passively will not make you a better player. You must actively look for mechanical errors. 1. Identify Your Aim Bottlenecks : Some external viewers allow you to see
Turn off your osu! chat overlay ( Shift + F12 ) and interface ( Shift + Tab ) for a clean look. Play the replay in-game and hit in OBS. 5. Troubleshooting Common Replay Viewer Issues "Beatmap missing" error
OSU is a free-to-play rhythm game developed by Osu! Team, where players tap, slide, and spin to the beat of various songs. The game has a large online community, with millions of users worldwide. One of the key features of OSU is its replay system, which allows players to record and share their gameplay. However, the built-in replay viewer has limitations, and players often rely on third-party tools to analyze and visualize their replays. This paper aims to design and implement an OSU replay viewer that can playback, analyze, and visualize OSU game replays.
The native .osr file format only contains movement and input data—not actual video. If you want to share your play on YouTube or Discord, you must convert it into a video format. Method 1: Using In-Game Export (osu!lazer) It provides a detailed UR bar and judgment
The osu! replay viewer is more than a way to watch a cursor dance across a screen. It is a diagnostic lab for the dedicated, a cinema for the fans, and a courtroom for the skeptics. By capturing the fleeting movements of a high-speed performance, it ensures that every click is remembered and every achievement is earned.
| Byte Range | Type | Description | |------------|------|-------------| | 0-3 | int | Game mode (0=std, 1=taiko, 2=ctb, 3=mania) | | 4-7 | int | Game version (e.g., 20250316) | | 8-11 | int | Beatmap MD5 hash (as string offset) | | 12-15 | int | Player name (string offset) | | 16-19 | int | Replay MD5 hash (as string offset) | | 20-21 | short | Number of 300s / Geki / etc. (mode-dependent) | | ... (varies) | ... | Counts for 100s, 50s, misses, combo, perfect flag | | 22 | byte | Mods bitwise (enum, 32-bit later in newer osu! versions) | | 23-26 | int | Life bar graph (string offset) | | 27-30 | int | Timestamp (Windows ticks) | | 31-34 | int | Replay length in bytes (for compressed data) | | 35+ | byte[] | Compressed replay data (LZ4 or older zlib) | | End | long | Replay ID (online submission) |
An .osr file contains only data points (cursor coordinates, time stamps, and keypresses). It does not contain video or audio. To open an .osr file successfully, use these steps:
: If your local scores disappear, you can sometimes recover them by deleting scores.db in your installation folder and pressing F5 in-game to rebuild the database.
To truly understand how these viewers work, one must look at the .osr file format itself. is a proprietary binary file format that stores every action performed during a playthrough.