It means Everton can meet the needs of broadcasters and photographers, as well as the emergency services and security.
"status": "Incomplete"
，更多细节参见safew官方下载
There is a minor artefact in the final file. The stitched .m4a sometimes contains silent padding at the start or end from incomplete chunks at buffer boundaries. A quick ffmpeg pass fixes it cleanly:
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if (controller.desiredSize