How to Set Up the OBS Replay Buffer to Clip Your Best Moments

The best plays happen when you least expect them, and you can't predict them in time to hit record. The OBS replay buffer solves this: it constantly keeps the last few minutes in memory, so when something amazing happens, one keypress saves it. This is how console-style "instant replay" works on PC.

Why the replay buffer beats recording everything

If you record your whole session, you end up with hours of footage to scrub through and a huge file eating your drive. The replay buffer flips that around:

• It only writes to disk after you press save, capturing just the last X seconds.
• It runs continuously with minimal overhead, especially on a hardware encoder.
• You get short, share-ready clips instead of marathon recordings.

For highlight hunting, it is simply the smarter tool.

Step 1: Enable the replay buffer

Open Settings > Output. The replay buffer toggle location depends on your output mode:

• In Simple output mode, check Enable Replay Buffer.
• In Advanced output mode, it's on the Replay Buffer tab.

Enabling it adds a Start Replay Buffer button to the Controls panel.

Step 2: Set your buffer length

Set Maximum Replay Time to how many seconds back you want to capture. Good starting points:

• 30 seconds for quick shooter highlights (a clutch round, a multi-kill).
• 60-90 seconds for plays with build-up, like a comeback or a long fight.

Longer buffers use more RAM, because OBS holds that footage in memory. Keep it as short as your clips actually need.

Step 3: Make sure quality settings are set

The replay buffer uses your normal recording settings, so the same encoder and quality choices apply. Use your GPU's hardware encoder (NVENC for NVIDIA, AMF for AMD, QuickSync for Intel) so the buffer runs continuously without hurting your frame rate. Record at 1080p 60FPS for crisp, smooth highlights.

Step 4: Assign a save hotkey

This is the important part. Go to Settings > Hotkeys and find Save Replay. Bind it to something you can hit instantly mid-game without alt-tabbing, like a mouse side button or an unused F-key. There is no default save hotkey in OBS, you must set one yourself.

Also worth binding: Start Replay Buffer, so you can arm it without touching the OBS window.

Step 5: Use it

1. Click Start Replay Buffer (or use your hotkey) when you begin playing.
2. Play normally. OBS quietly keeps the last X seconds in memory.
3. The moment something great happens, press your Save Replay hotkey.
4. OBS writes the clip to your recording folder.

That's it. The clip is on disk, named with a timestamp, ready to trim.

Finding and sharing your clips

Replay clips save to your configured recording path, the same folder as normal recordings. Use File > Show Recordings in OBS to open it fast. If you saved to MKV, remux to MP4 (File > Remux Recordings) so it plays everywhere and uploads cleanly.

A buffer clip is usually short and self-contained, which makes it perfect for sharing without any editing. Drop it straight onto FragClips from the upload page, then check the Explore feed and your title's game pages to see how your highlight stacks up.

Arm the buffer at the start of every session and you'll never lose a great moment again. Saved a clutch play? Take it to the upload page and let everyone see it.