fix: improve video capture quality for HDMI capture cards#34
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The main issue was a leaked MediaStream from the permission request in
getVideoDevices() — the stream was never stopped, which locked the
capture card (e.g. Elgato Cam Link 4K) at its default 640x480 resolution
before startVideoStream could request a proper resolution.
Additional fixes:
- Remove image-rendering: -webkit-optimize-contrast which forced
nearest-neighbor (pixelated) scaling on the video element
- Add image-rendering: high-quality and filter: contrast(1) to use
Chromium's GPU filter pipeline with better interpolation
- Add frameRate: { ideal: 60 } to all getUserMedia constraints
- Cap resolution retry at 1920x1080 to prefer uncompressed formats
over MJPEG on USB capture cards
- Remove GPU flags (enable-accelerated-mjpeg-decode,
enable-native-gpu-memory-buffers) that could interfere with
UVC device format negotiation
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Required by repo policy — pin all actions to their v4/v2 commit SHAs instead of version tags. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
getVideoDevices()— the permission request stream was never stopped, locking capture cards (e.g. Elgato Cam Link 4K) at 640x480 before the actual stream could negotiate a proper resolutionimage-rendering: -webkit-optimize-contrastwhich forced pixelated nearest-neighbor scaling; replaced withhigh-qualityand GPU filter pipeline renderingframeRate: { ideal: 60 }to all getUserMedia constraints and cap resolution retry at 1920x1080 to prefer uncompressed formats over MJPEGenable-accelerated-mjpeg-decode,enable-native-gpu-memory-buffers) that interfered with UVC device format negotiationTest plan
🤖 Generated with Claude Code