合成视频

arka compose_video compose --topic "AI infrastructure" --llm
arka compose_video compose --topic "AI infrastructure" --text   # 旧版字幕
arka compose_video compose --topic "AI infrastructure" --mode photos
arka compose_video --script scenes.json

VIDEO_MODE=hybrid arka compose_video compose --topic "cinematic mountains"
VIDEO_BURN_TEXT=1 arka compose_video compose --topic "AI trends" --llm

arka compose_video \
  --topic "AI infrastructure" \
  --script-provider custom \
  --api-url https://example.com/arka/video-script

VIDEO_SCRIPT_PROVIDER=custom
VIDEO_SCRIPT_API_URL=https://example.com/arka/video-script
VIDEO_SCRIPT_API_KEY=...

VIDEO_SCRIPT_API_KEY_ENV=MY_COMPANY_VIDEO_API_KEY

{
  "topic": "AI infrastructure",
  "topic_raw": "ai infrastructure",
  "scenes": 6,
  "target_duration_sec": 300,
  "schema": {
    "type": "array"
  }
}

{
  "scenes": [
    {
      "title": "Why AI infrastructure matters",
      "narration": "AI infrastructure is the stack behind modern models.",
      "body": "The stack behind AI",
      "captions": ["Models need compute", "Data and serving matter"],
      "image_keywords": ["gpu server", "data center"],
      "duration": 8
    }
  ]
}

arka compose_video --topic "AI infra" --script-provider custom --api-header "X-Team: demo"
arka compose_video --topic "AI infra" --script-provider custom --api-key-env MY_VIDEO_KEY
arka compose_video check