Defaults are Original size requested resolution, 30 FPS, 4 Mbps video, 128 kbps audio and 30-minute segments. Settings are frozen during a recording so the encoder and file lifecycle remain consistent.
Quality preset
Medium is selected by default. Each preset fills the requested resolution, frame rate, video bitrate and audio bitrate shown below. Each field remains editable without changing the selected quality level. Changing the quality level resets its fields to the preset values. Audio-only mode adjusts only audio bitrate (64 / 128 / 256 kbps). Presets do not change the save folder, audio sources, format or segment duration. Mobile audio keeps its 5-minute segment default. These are requested targets, not guaranteed output.
- Low: Original size · 15 FPS · 2 Mbps (Video bitrate) · 64 kbps (Audio bitrate)
- Medium: Original size · 30 FPS · 4 Mbps (Video bitrate) · 128 kbps (Audio bitrate)
- High: Original size · 60 FPS · 12 Mbps (Video bitrate) · 256 kbps (Audio bitrate)
How to use it
- Capture uses the source’s original dimensions without a resolution selector. For slides, try 15–30 FPS; fast motion may need 30–60 FPS and a higher video bitrate.
- Select audio bitrate based on the source; higher bitrate is not a substitute for a good microphone.
- Read the hourly disk estimate, then record a short sample. Choose a shorter segment if limiting possible loss is more important than minimizing gaps.
Limits and safety
The estimate is bitrate × time ÷ 8 and excludes variable bitrate and container overhead. Requested resolution, FPS and bitrates may differ from actual browser output. Changing settings does not upscale the original screen source.
References
Check the result, not just the controls
A practical test
Use a short sample of the real material: small interface text, motion and speech stress different settings. Compare readability, smoothness, file size and write-queue behavior rather than choosing the largest numbers automatically. Requesting a frame rate does not force a busy browser or source to deliver it. If the sample stutters, reduce the workload before starting an important session.