Video Generation (AI SDK)
Tuzi API video generation backend. Default model: veo3.1.
Script Directory
Agent Execution:
SKILL_DIR= this SKILL.md file's directory- Script path =
${SKILL_DIR}/scripts/main.ts
Step 0: Load Preferences ⛔ BLOCKING
CRITICAL: This step MUST complete BEFORE any video generation. Do NOT skip or defer.
0.1 Check API Key
echo "${TUZI_API_KEY:-not_set}"
grep -s TUZI_API_KEY .tuzi-skills/.env "$HOME/.tuzi-skills/.env"| Result | Action |
|---|---|
| Key found | Continue to Step 0.2 |
| Key NOT found | ⛔ Run API key setup (see references/config/first-time-setup.md) → Store key → Then continue |
0.2 Check EXTEND.md
test -f .tuzi-skills/tuzi-video-gen/EXTEND.md && echo "project"
test -f "$HOME/.tuzi-skills/tuzi-video-gen/EXTEND.md" && echo "user"| Result | Action |
|---|---|
| Found | Load, parse, apply settings |
| Not found | ⛔ Run first-time setup (references/config/first-time-setup.md) → Save EXTEND.md → Then continue |
| Path | Location |
|---|---|
.tuzi-skills/tuzi-video-gen/EXTEND.md | Project directory |
$HOME/.tuzi-skills/tuzi-video-gen/EXTEND.md | User home |
EXTEND.md Supports: Default model | Default seconds | Default size
Schema: references/config/preferences-schema.md
Usage
# Single video
npx -y bun ${SKILL_DIR}/scripts/main.ts --prompt "A cat walking in a garden" --video cat.mp4
# With model and duration
npx -y bun ${SKILL_DIR}/scripts/main.ts --prompt "城市夜景延时" --video city.mp4 --model veo3 --seconds 8
# With reference image
npx -y bun ${SKILL_DIR}/scripts/main.ts --prompt "Animate this scene" --video out.mp4 --ref source.png
# From prompt file
npx -y bun ${SKILL_DIR}/scripts/main.ts --promptfiles prompt.md --video out.mp4
# Long video (multi-segment with ffmpeg concat)
npx -y bun ${SKILL_DIR}/scripts/main.ts --prompt "A journey through seasons" --video long.mp4 --segments 3
# Long video with per-segment prompts
npx -y bun ${SKILL_DIR}/scripts/main.ts --video long.mp4 --segments 3 --segment-prompts seg1.md seg2.md seg3.mdOptions
| Option | Description | ||
|---|---|---|---|
--prompt <text>, -p | Prompt text | ||
--promptfiles <files...> | Read prompt from files (concatenated) | ||
--video <path> | Output video path (required) | ||
--model <id>, -m | Model ID (default: veo3.1) | ||
--seconds <n>, -s | Duration in seconds | ||
--size <WxH> | Video size (e.g., 1280x720, 16x9) | ||
--ref <files...> | Reference images | ||
| `--ref-mode reference\ | frames\ | components` | Reference image mode |
--segments <n> | Long video segment count (min 2) | ||
--segment-prompts <files...> | Per-segment prompt files | ||
--json | JSON output |
Models
| Model | Provider | Duration | Sizes | Image Mode |
|---|---|---|---|---|
veo3 | Veo | 8s | 16:9, 9:16 | reference |
veo3.1 (default) | Veo | 8s | 16:9, 9:16 | frames |
veo3.1-4k | Veo | 8s | 4K | frames |
sora-2 | Sora | 10/15s | 16:9, 9:16 | reference |
sora-2-pro | Sora | 10/15/25s | 16:9, 9:16, HD | reference |
kling-v1-6 | Kling | 5/10s | 16:9, 9:16, 1:1 | reference |
seedance-1.5-pro | Seedance | 5/10s | 1080p, 720p | frames |
Long Video Mode
When --segments N is specified (N >= 2):
- Generates N video segments sequentially
- After each segment, extracts last frame via ffmpeg
- Last frame becomes next segment's reference image (continuity)
- All segments concatenated via
ffmpeg -f concat - Temporary files cleaned up
Requirements: ffmpeg must be installed.
Per-segment prompts: Use --segment-prompts to provide individual prompt files for each segment. If fewer files than segments, remaining segments use the main --prompt.
Environment Variables
| Variable | Description |
|---|---|
TUZI_API_KEY | Tuzi API key (https://api.tu-zi.com) |
TUZI_VIDEO_MODEL | Default video model (default: veo3.1) |
TUZI_BASE_URL | Custom Tuzi endpoint (default: https://api.tu-zi.com) |
Load Priority: CLI args > EXTEND.md > env vars > <cwd>/.tuzi-skills/.env > ~/.tuzi-skills/.env
Model Resolution
Priority (highest → lowest):
- CLI:
--model <id> - EXTEND.md:
default_model - Env var:
TUZI_VIDEO_MODEL - Built-in default:
veo3.1
Agent MUST display model info before each generation:
- Show:
Using [model] - Show switch hint:
Switch model: --model <id> | EXTEND.md default_model | env TUZI_VIDEO_MODEL
Error Handling
- Missing API key → ⛔ MUST run API key setup from Step 0.1
- Generation failure → auto-retry once
- Business failure (content rejected) → no retry, report error
- Network error → exponential backoff (1.5x, max 60s)
- Timeout → error after 90 minutes
- Missing ffmpeg (long video mode) → clear error with install instructions
Extension Support
Custom configurations via EXTEND.md. See Step 0 for paths and supported options.