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We explore a new application domain; live streaming service with aerial vehicles, drone. The performance of real-time streaming application highly affected by the variant wireless network. To provide stable and satisfactory streaming service, we propose real-time video transcoding solution. Our system uses channel-aware approach to realize efficient video bitrate adaptation for broadcasting live stream. We implement hardware-assisted video transcoding on a single-board computer, Raspberry Pi, and mount it on the drone for live streaming application.