pixcli（PIX CLI 图像）

pixcli

Creative toolkit for AI agents. Generate images, videos, voiceover, music, and sound effects — then assemble polished output via Remotion.

Philosophy: The CLI handles complexity (task classification, prompt enrichment, model selection). You just describe what you want.

Requirements

What runs at runtime and why

• npx --yes pixcli <command>: Downloads + caches the pixcli CLI from npm on first invocation, then runs it. All subsequent calls use the cached binary. The --yes flag is required in agent contexts to avoid interactive prompts. pixcli is an HTTP client — it sends prompts to the pixcli API (https://pixcli.shellbot.sh/api/v1/*), polls for completion, and downloads the resulting files. It does not execute arbitrary code.
• npx --yes remotion <command>: Same pattern for the Remotion video renderer. Only used when assembling final videos from generated assets using the bundled templates.
• npm install (no arguments): Runs inside a copied template directory to install the dependencies declared in that template's package.json. The agent never passes package names to npm install — only hydrates declared deps.
• ffmpeg / ffprobe: Local-only media operations (trim, merge, scale, get info). No network access.

What does NOT run

• No bare npx <arbitrary-package> — only npx pixcli and npx remotion
• No npm install <package-name> — only bare npm install
• No node <script> — the agent never executes arbitrary JavaScript
• No npm publish, npm config, or any npm command beyond install and run <script>

Setup

1. Use the CLI

AI agents should always run pixcli via npx --yes pixcli — it's in the scoped allowlist and requires no global install:

npx --yes pixcli image "a red fox in a forest"

Humans who prefer a global install for interactive terminals can optionally run npm install -g pixcli once outside the agent — the agent doesn't need (or have permission for) that command.

Important for AI agents: npx prompts for confirmation before installing packages. The --yes flag auto-accepts. Without it, the command will hang waiting for input. Always use npx --yes pixcli in non-interactive contexts.

Always use --json: All commands support --json which suppresses spinners and human-readable output, returning only structured JSON to stdout. This minimizes token consumption and gives you machine-parseable results. Alternatively, set PIXCLI_JSON=1 once to enable JSON mode for all commands without passing the flag each time.

2. Authenticate

export PIXCLI_API_KEY="px_live_..."

Get your API key at https://pixcli.shellbot.sh. The key covers all capabilities: images, video, voice, music, and sound effects.

3. Verify

pixcli --version
pixcli image "test: a simple blue circle on white background" -o test.png

Agent execution: long-running jobs

Video generation can take 1–10+ minutes (Seedance, Kling, Veo). This matters for agents because:

• The CLI blocks synchronously while polling for completion
• Agent tool-call timeouts (typically 2–5 minutes) can kill the process before the video is ready
• Wasted tokens: spinner updates every 2 seconds don't print in --json mode, but the blocking wait wastes wall-clock budget

The recommended pattern: submit → check (non-blocking)

All generation commands support --no-wait which returns immediately after submission with the job_id. The agent can then check status as often as needed with the non-blocking pixcli job command.

# 1. ALWAYS set these at the start of your session
export PIXCLI_JSON=1       # suppress spinners, return only JSON
export PIXCLI_API_KEY="px_live_..."

# 2. Submit a video job (returns in ~3-10s instead of 5-10 min)
npx --yes pixcli video "A cinematic product orbit, soft lighting" \
  --from product.png --no-wait
# Output: {"job_id":"abc123", "status":"submitted", "check_command":"pixcli job abc123 --json", ...}

# 3. Do other work, then check status (instant, non-blocking)
npx --yes pixcli job abc123
# Output: {"status":"processing", "current_step":1, "total_steps":2}

# 4. When ready, wait + download
npx --yes pixcli job abc123 --wait -o output.mp4
# Output: {"status":"completed", "files":[...], "cost":150000}

When to use --no-wait vs default (blocking)

Token consumption

Always set PIXCLI_JSON=1 at the start of your agent session. This single environment variable suppresses spinners, human-readable text, and progress updates for ALL pixcli commands — reducing token cost by ~90%.

Timeout recovery

If a blocking call times out (either the agent's tool timeout or the CLI's internal 10-minute limit), the job is still running on the server. The JSON error output includes recovery commands:

{
  "job_id": "abc123",
  "status": "timeout",
  "error": "CLI poll timeout — job still running on server",
  "check_command": "pixcli job abc123 --json",
  "wait_command": "pixcli job abc123 --wait --json"
}

Parse check_command and execute it to recover. The server never loses a job — it runs to completion regardless of whether the CLI is connected.

Parallel video pipeline example

Generate 3 video clips simultaneously without blocking between them:

# Submit all three (each returns in ~5s)
npx --yes pixcli video "Product hero orbit" --from hero.png --no-wait -o hero.mp4
npx --yes pixcli video "Lifestyle scene, natural light" --from lifestyle.png --no-wait -o lifestyle.mp4
npx --yes pixcli video "App demo, smooth scroll" --from demo.png --no-wait -o demo.mp4

# Parse job IDs from each output
# Then poll all three:
npx --yes pixcli job $JOB_1
npx --yes pixcli job $JOB_2
npx --yes pixcli job $JOB_3

# When all are "completed", download:
npx --yes pixcli job $JOB_1 --wait -o hero.mp4
npx --yes pixcli job $JOB_2 --wait -o lifestyle.mp4
npx --yes pixcli job $JOB_3 --wait -o demo.mp4

This produces 3 videos in the time it takes to render 1 — ~5-8 minutes total instead of ~15-24 minutes sequential.

Commands

pixcli image <prompt> — Generate images

pixcli image "Studio product shot of wireless earbuds, soft lighting, white background" --json

Models: flux-pro, flux-dev, seedream-v5, nano-banana-pro (Google Direct), nano-banana-2 (Google Direct), nano-banana-pro-fal / nano-banana-2-fal (same models via fal), nano-banana-pro-or / nano-banana-2-or (via OpenRouter — requires x-openrouter-key), imagen-4, imagen-4-fast, gpt-image-1 (OpenRouter). Use pixcli models --type image for the live list.

pixcli edit <prompt> — Edit images

pixcli edit "Remove the background" -i product.jpg -o product-nobg.png --json

Models: seedream-v5-edit, phota-enhance, rembg, recraft-upscale, aura-sr

pixcli video <prompt> — Generate video

# Image-to-video (recommended: generate still first, then animate)
pixcli video "Slow camera orbit around the product" --from product.png -o reveal.mp4 --json

# Text-to-video (generates image automatically, then animates)
pixcli video "A cat walking through a garden at sunset" -o cat.mp4 --json

# Extend an existing video
pixcli video "The cat jumps over a fence" --from cat.mp4 --extend -o cat-extended.mp4 --json

Models — fal backend: veo31-lite-i2v (default I2V, Veo 3.1 Lite), veo31-lite-t2v (default T2V, Veo 3.1 Fast), veo31-lite-transition (start→end frame), kling-o3-pro-i2v (cinematic, best quality), kling-o3-pro-t2v, kling-o3-standard-i2v, kling-o3-standard-t2v, kling-v3-pro-i2v, veo3-i2v (premium, native audio + lipsync), veo3-t2v, pixverse-v6-i2v / -t2v / -transition / -extend (stylized, audio, multi-clip), ltx-t2v (budget T2V), ltx-extend-video (budget extension, native audio), wan-v2-i2v (cheap motion), minimax-i2v (fast, avoid for faces), grok-extend-video

Models — muapi backend (Seedance 2 family): seedance-2-t2v / -fast, seedance-2-i2v / -fast, seedance-2-omni / -fast (multimodal: up to 9 image refs + 3 audio refs via @image1..@image9 / @audio1..@audio3), seedance-2-first-last-frame / -fast. VIP / 2K tier (priority routing, 2K resolution, ~50% premium): seedance-2-vip-t2v / -fast, seedance-2-vip-i2v / -fast, seedance-2-vip-first-last-frame / -fast, seedance-2-vip-omni / -fast. Routing is automatic: mention "seedance" / "bytedance" / "doubao" in the prompt, use the @image1/@audio1/@character:id grammar, or pass --quality draft (routes to -fast). See references/seedance-playbook.md for the full prompt playbook.

Opinionated approach: Always generate a still first with pixcli image, review it, then animate with pixcli video --from. This gives you control over the starting frame.

Logo animations (brand reveals / intros / bumpers): pass --from logo.png and mention both "logo"/"brand" AND an animation intent ("reveal", "intro", "bumper", "animate") in the prompt — the API auto-detects this and swaps in a specialist Motion Logo Director that emits a 6-stage timeline with sound design, music, and optional voiceover. See references/seedance-logo-motion.md for the full playbook.

Video prompting — the core formula

Every video prompt should follow this structure:

Subject → Action → Environment → Camera → Style → Constraints

Target 60–100 words. Shorter = vague. Longer = conflicting instructions that degrade coherence.

The 10 rules that always apply:

1. One camera move per shot. Always. Combining causes jitter.
2. Separate subject motion from camera motion. ✅ "The dancer spins. Camera holds fixed." ❌ "Spinning camera around a dancing person."
3. For I2V, only describe what changes — the image carries composition and identity. Add Preserve composition and colors.
4. Use physical verbs — melt, fracture, snap open > becomes / transforms.
5. Lighting is your biggest quality lever — always name the light (golden hour, rim light, natural window light, neon, soft diffused, dramatic stage lighting).
6. Write on a timeline for 10s+ clips — break into 3–5 time-coded beats: [0s–3s]:, [3s–7s]:, etc.
7. Every asset gets a job — if a file has no role, it's noise. Be explicit about what each --from / --to does.
8. Put negatives in --negative, not in the main prompt.
9. For video extend, -d is the NEW duration, not the total.
10. Draft before hero — always iterate with -q draft (auto-routes to 480p Seedance or ltx-t2v) before burning credits on a full render.

Read references/seedance-playbook.md for the complete playbook — camera movement catalog, lighting table, timeline prompting templates, multimodal role assignment, and 10+ ready-to-paste command recipes.

pixcli voice <text> — Text-to-speech

pixcli voice "Welcome to the future of productivity." -o voiceover.mp3 --json
pixcli voice "Bienvenidos al futuro." --voice Sarah --language es -o vo-spanish.mp3 --json

pixcli music <prompt> — Generate music

pixcli music "Subtle ambient electronic, minimal beats, corporate technology feel" -d 45 -o bg-music.mp3 --json

pixcli sfx <prompt> — Generate sound effects

pixcli sfx "Smooth cinematic whoosh transition" -d 1.5 -o whoosh.mp3 --json
pixcli sfx "Soft digital click, subtle UI interaction" -d 0.5 -o click.mp3 --json

pixcli models — List available models

# Every model, grouped by type
pixcli models --json

# Only Seedance
pixcli models --search seedance --json

# Only video models routed through muapi
pixcli models --type video --backend muapi --json

Backs onto GET /api/v1/models?type=...&backend=...&search=.... Use this to discover model ids before passing them to -m on any generation command.

pixcli job <id> — Check job status and download results

# Check status of a job
pixcli job abc123 --json

# Wait for completion and download
pixcli job abc123 --wait -o output.mp4 --json

Use case: Recover timed-out jobs. Video generation can take 5-8 minutes — if the CLI times out, it prints the job ID and a recovery command. Run pixcli job <id> --wait to pick up where you left off.

Global options

Read references/command-reference.md for the full parameter reference.

Opinionated creative workflow

The full production pipeline

1. Generate scene stills with pixcli image — use -n 4 for variations, pick the best. Use --search for real-world accuracy (correct logos, current brands). Use --from with multiple images to blend references
2. Edit heroes with pixcli edit — upscale, remove backgrounds, enhance
3. Animate 2-3 hero stills with pixcli video --from — cinematic motion for key moments
4. Generate voiceover with pixcli voice — one file per scene
5. Generate background music with pixcli music — one track for the full composition
6. Generate sound effects with pixcli sfx — transition whooshes, UI sounds (use sparingly)
7. Assemble everything in Remotion — timing, text, transitions, branding, audio mix
8. Render final video with npx remotion render

When to use AI video vs Remotion

Use pixcli video for:

• Hero moments: product reveals, cinematic openings, emotional beats (3-8s clips)
• Organic motion that's hard to code: water, fire, fabric, hair, camera orbits
• Image-to-video: animate a still into a living scene
• Transition inserts: short clips between Remotion scenes

Use Remotion for:

• Text animations, captions, kinetic typography
• Precise timing synced to voiceover
• Brand overlays, logos, consistent color grading
• Data visualizations, metric counters, charts
• Scene transitions (cuts, wipes, dissolves — deterministic)
• Final assembly: compositing AI video clips + stills + audio + text

The ideal combined workflow:

1. Generate scene stills with pixcli image (consistency via shared style prompts)
2. Animate 2-3 hero stills with pixcli video --from (cinematic motion)
3. Generate voiceover + music + SFX
4. Assemble everything in Remotion (timing, text, transitions, audio mix)

Audio layering strategy

• Voiceover at volume 1.0 — clear, intelligible, primary channel
• Music at 0.15-0.25 — duck under voiceover, never compete
• SFX sparse and purposeful — only when they reinforce movement
• Avoid dense music during problem framing

Quality tiers

• draft — Fast iteration, concepting, throwaway tests
• standard — Good for most production work (default)
• high — Hero shots, final delivery assets

ffmpeg local editing

Use ffmpeg for quick video/audio edits without a full Remotion project. These run locally — no API calls needed.

Video operations

# Trim video (extract 5 seconds starting at 2s)
ffmpeg -i input.mp4 -ss 00:00:02 -to 00:00:07 -c copy trimmed.mp4

# Split video at a timestamp
ffmpeg -i input.mp4 -t 5 -c copy first-half.mp4
ffmpeg -i input.mp4 -ss 5 -c copy second-half.mp4

# Merge videos (create filelist.txt first)
echo "file 'clip1.mp4'" > filelist.txt
echo "file 'clip2.mp4'" >> filelist.txt
ffmpeg -f concat -safe 0 -i filelist.txt -c copy merged.mp4

# Scale video to 1080p
ffmpeg -i input.mp4 -vf "scale=1920:1080" -c:a copy scaled.mp4

Audio operations

# Add audio track to video
ffmpeg -i video.mp4 -i music.mp3 -c:v copy -c:a aac -shortest output.mp4

# Replace audio track
ffmpeg -i video.mp4 -i new-audio.mp3 -c:v copy -c:a aac -map 0:v -map 1:a output.mp4

# Mix voiceover + music (music ducked to 20%)
ffmpeg -i voiceover.mp3 -i music.mp3 -filter_complex "[1:a]volume=0.2[music];[0:a][music]amix=inputs=2:duration=longest" mixed.mp3

# Extract audio from video
ffmpeg -i video.mp4 -vn -acodec copy audio.aac

# Get media info
ffprobe -v quiet -print_format json -show_streams input.mp4

Remotion video production

Remotion is the source of truth for timing, layout, animation, and render. Use pixcli to generate the visual and audio assets, then assemble everything in Remotion.

Bootstrapping a Remotion project

cp -r assets/templates/cinematic-product-16x9 ./my-video
cd ./my-video && npm install
npx remotion studio     # Preview
npx remotion render src/index.ts MainComposition out/video.mp4  # Render

Templates

Integrating AI video clips in Remotion

Use OffthreadVideo for AI-generated clips inside Remotion compositions:

import { OffthreadVideo, Sequence, Audio, Img, staticFile } from "remotion";

// AI video clip as a hero moment
<Sequence from={0} durationInFrames={150}>
  <OffthreadVideo src={staticFile("assets/hero-reveal.mp4")} />
</Sequence>

// AI-generated still as background
<Sequence from={150} durationInFrames={120}>
  <Img src={staticFile("assets/scene-solution.png")} style={{ width: "100%", height: "100%" }} />
</Sequence>

// Voiceover + music
<Audio src={staticFile("audio/voiceover.mp3")} volume={1} />
<Audio src={staticFile("audio/music.mp3")} volume={0.2} />

Remotion principles

• Keep all Remotion packages on the same pinned version
• Transitions: 8-18 frames, purposeful (not decorative)
• Load fonts explicitly with @remotion/google-fonts
• Always run npm run verify before npm run render
• Load reference rules from references/remotion-rules/ as needed

Read references/remotion-playbook.md for detailed Remotion implementation guidance.

Output convention

• pixcli downloads generated files to the current directory (or path specified with -o)
• Use --json for machine-readable output (pipe to jq or parse in scripts)
• All operations are synchronous from the CLI perspective (the CLI handles async polling internally)
• Video jobs may take 1-8 minutes (the CLI shows progress). If a job times out, use pixcli job <id> --wait to recover

References

Creative guidance

• references/command-reference.md — Full parameter docs for all pixcli commands
• references/creative-guidelines.md — Quality standards for productions
• references/prompt-cookbook.md — Proven prompt patterns for every task
• references/seedance-playbook.md — Video prompting masterclass (Seedance 2 + all video models): 6-element formula, camera catalog, lighting table, timeline prompting, multimodal role assignment, 10+ ready-to-paste recipes
• references/seedance-logo-motion.md — Logo animation specialist playbook. Use when the user provides a logo image + asks for a brand reveal / intro / bumper. Auto-activated by the API when --from logo.png is combined with logo+motion keywords.
• references/workflow-recipes.md — End-to-end recipe examples
• references/ancillary-assets.md — Asset generation strategy for Remotion scenes

Remotion

• references/remotion-playbook.md — Remotion implementation guide
• references/template-showcase.md — Template selector guide
• references/remotion-rules-index.md — Index of 30+ Remotion rule files
• references/remotion-rules/ — Detailed rules (animations, audio, text, transitions, etc.)

Templates

• assets/templates/aida-classic-16x9/
• assets/templates/cinematic-product-16x9/
• assets/templates/saas-metrics-16x9/
• assets/templates/mobile-ugc-9x16/
• assets/templates/blank-16x9/
• assets/templates/explainer-16x9/