How This Recorder Works
This recorder utilizes modern web technologies to capture audio and video directly in your browser. Here's a breakdown of how it functions:
Recording Process
- The recorder uses the MediaRecorder API to capture audio and video streams.
- For screen recording, it uses the getDisplayMedia() method to capture the screen content.
- For audio recording, it uses getUserMedia() to capture audio from the microphone or system audio.
- The captured data is stored in memory as a series of Blob objects.
- MP4: Actually recorded as WebM and then labeled as MP4 for compatibility.
- WAV: Recorded as raw PCM audio data.
- OGG: Recorded using the Opus codec for audio compression.
Memory Usage and Recording Time
The maximum recording time depends on available browser memory and the complexity of the recorded content. Approximate guidelines:
- Audio-only:
- WAV: Up to 3-4 hours (48kHz, 16-bit stereo)
- OGG: Up to 10-12 hours (depends on compression settings)
- 1080p (1920x1080) screen recording at 30fps:
- ~1.5GB per hour for low motion content
- ~4.5GB per hour for high motion content
- Maximum practical recording time for 1080p screen: 30-60 minutes, depending on available system memory
Tips and Tricks
- Lower the frame rate for longer recordings or when capturing low-motion content.
- Reduce the capture area to extend recording time and reduce file size.
- Use the audio-only option when video isn't necessary to significantly reduce memory usage.
- For very long recordings, consider using a dedicated screen recording software instead of a browser-based solution.
- Clear your browser cache before long recording sessions to maximize available memory.
- If recording system audio, ensure you have the necessary permissions and drivers installed for audio loopback.
- For phone call recording, be aware of legal requirements in your jurisdiction regarding consent for recording conversations.
Browser Compatibility
This recorder works best with modern versions of Chrome, Firefox, and Edge. Safari has limited support for some features. Mobile browsers may have restrictions on background recording and screen capture.
Privacy and Security
All recording is done locally in your browser. No data is sent to any server during the recording process. However, be cautious about the websites you visit or the content you display while recording your screen.