Record screen or camera in the browser, then batch-process with host
bare-ffmpeg. Nearline — not a live encode pipeline.
Nearline batch: Capture → MediaRecorder →
transcode / extractFrame.
For continuous host bare-ffmpeg encode, use
Live Encode.
For browser WebRTC A/V, use
Screenshare.
Media pack unavailable. Rebuild the default host and repair macOS codesign if needed.