FFmpeg video transcode to a smaller MP4 (same resolution and fps). H.264 (x264) or HEVC (nvenc GPU / x265 CPU). Caps: 16 GiB, 2 hours. Do not pay this URL first. 1) GET /v1/info 2) POST /v1/jobs with JSON {profile: nvenc|x264|x265} 3) HTTP PUT the file to the returned uploadUrl 4) POST /v1/jobs/start with JSON {id} and x402 upto on Base USDC. Bill is (durationSeconds/60)*rate. Jobs queue after pay; poll GET /v1/jobs/:id. /v1/info has queueLength and etaSeconds.