Attempt 1:
{"event": "summary", "completed": false, "mediaSaved": false, "bytes": 0, "exitCode": 4294967274}
ffmpeg: Failed to capture image (error 5). Output file does not contain any stream.
Attempt 2 (public reply: danger-full-access; no captured approval panel):
identical Failed to capture image (error 5), mediaSaved false, bytes 0.