Using a Raspberry Pi 4 connected directly to an HDMI living room TV with an external USB webcam creates a dedicated, affordable family video-conferencing terminal. However, running WebRTC in standard Chromium on ARM without optimizations often causes CPU throttling, audio noise, and meeting lag.
Optimal Hardware Choices: Raspberry Pi 4 (4GB) • Logitech C920 / C922 / C270 USB Webcam • Micro-HDMI to HDMI audio
Critical Hardware & Audio Points
- Microphone Input: The Raspberry Pi 4's 3.5mm onboard jack is output only (no microphone input pin). Connecting standard headset microphones requires either an external USB audio dongle or a webcam with integrated noise-cancelling microphones (e.g. Logitech C920).
- Audio Routing: Configure ALSA/PulseAudio to output conference sound through HDMI to your TV speakers while capturing voice from the USB webcam microphone.
Chromium Performance Optimizations for WebRTC
Launch Chromium in kiosk mode with hardware GPU acceleration flags:
chromium-browser --kiosk --start-fullscreen --enable-accelerated-video-decode --use-gl=egl --ignore-gpu-blocklist --autoplay-policy=no-user-gesture-required "https://meet.jit.si/YourPrivateRoom#config.startWithVideoMuted=false"
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