Screen Recorder | Quintaphon Docs

Record your screen, window, or tab with optional system and microphone audio. Pause and resume, pick resolution and codec, and save WebM or MP4 locally. Recording runs in a background offscreen document so you can close the popup.

TIP

Open the popup once before using the keyboard shortcut if offscreen capture has not initialized yet.

Getting started

Install Screen Recorder and click the toolbar icon.
Review quality settings (resolution, fps, bitrates, codec, audio source).
Click Start Record and choose what to share in Chrome's picker.
Use Pause or Stop when finished; the file downloads automatically.

Quality settings

Settings persist as recSettingsV1 in chrome.storage.local:

Setting	Options
Resolution	8K, 4K, 1440p, 1080p, Auto, Custom (up to 7680×4320)
Frame rate	144, 120, 60 (default), 30 fps
Video bitrate	100, 50 (default), 20, 12, 8 Mbps
Audio bitrate	320 (default), 256, 192, 128 kbps
Video codec	VP9+Opus (default), VP8, H.264, AV1
Audio source	System, Mic, System+Mic (default), Off
Output format	WebM (default) or MP4 when supported

Recording controls

Start Record, Pause, and Stop icon buttons
Status line: Standby, Select source..., Recording, Paused
Timer (HH:MM:SS), LIVE chip, and growing file size metadata
Toolbar badge shows REC or || while recording or paused
State syncs through recState in storage for popup/background consistency

Keyboard shortcuts

Shortcut	Action
Ctrl+Shift+5 (Mac: Cmd+Shift+9)	Toggle start/stop recording
Ctrl+Shift+6 (Mac: Cmd+Shift+0)	Pause / resume

Output files

Capture uses getDisplayMedia and MediaRecorder inside an offscreen document. Data is collected in 1-second chunks. Default filename pattern: screen-recording_YYYY-MM-DD_HH-MM-SS.webm. System+Mic mixes through Web Audio when both sources are available.

WARNING

MP4 export depends on browser MediaRecorder support; many profiles save WebM only. You must pick a share target in Chrome's system dialog.

Features

Resolution presets: Up to 8K with custom width and height.
Audio options: System audio, microphone, or combined sources.
Pause and resume: Pause without stopping the session.
Offscreen capture: Background worker maintains recording while popup is closed.
Keyboard toggle: Start/stop and pause without opening the popup.
Live file size: Watch recording size grow during capture.

Privacy

Recordings stay on your device until you save or delete them. The extension does not upload video to Quintaphon.

See the Apps & Extensions Policy and Privacy Policy for company-wide details.

Need help?

If Chrome denies permission, status returns to Standby. Canceling the share picker does not save a file. High resolutions and frame rates demand more CPU and disk space.