Wan 2.7 Video Edit API: Instruction-Based Video Editing for Production Workflows

This guide covers five real editing scenarios, the exact API parameters, cost math, and production patterns for teams shipping video editing into products.

TL;DR

• Model ID: wan2.7-video-edit
• Input: 1 source video (mp4/mov, 2-10 seconds) + text instruction + optional reference images (up to 4)
• Output: Edited video at 720p or 1080p
• Billing: Input video duration + output video duration. Failed tasks are free.
• EvoLink pricing: $0.086/sec at 720p. A 5-second edit costs ~$0.86 (5s input + 5s output = 10s billed).
• On EvoLink's current Wan routes, video editing is exposed through Wan 2.7. Wan 2.6 and 2.5 routes support generation only.

How it works

The model preserves the structure and motion of the original clip. It changes the aspects you describe — style, colors, objects, backgrounds — without re-generating the motion from scratch. This makes iteration cycles dramatically cheaper than full re-generation.

API parameters

Scenario 1: Style transfer

Convert a real-world clip into an artistic style.

curl -X POST https://api.evolink.ai/v1/videos/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "wan2.7-video-edit",
    "prompt": "Convert the entire scene to a clay-style look with soft rounded edges and pastel colors",
    "video_urls": ["https://your-cdn.com/street-scene.mp4"],
    "keep_original_sound": true,
    "duration": 0
  }'

Scenario 2: Background replacement

Swap the background while keeping the foreground subject intact.

{
  "model": "wan2.7-video-edit",
  "prompt": "Replace the background with a rain-soaked Tokyo street at night, with neon reflections on wet pavement",
  "video_urls": ["https://your-cdn.com/person-walking.mp4"],
  "keep_original_sound": false,
  "duration": 0
}

Scenario 3: Object and clothing change

Change specific objects or clothing in the video using a reference image.

{
  "model": "wan2.7-video-edit",
  "prompt": "Replace the girl's outfit with the clothes from the reference image",
  "video_urls": ["https://your-cdn.com/fashion-clip.mp4"],
  "image_urls": ["https://your-cdn.com/target-outfit.png"]
}

Scenario 4: Colorization

Convert black-and-white or desaturated footage to full color.

{
  "model": "wan2.7-video-edit",
  "prompt": "Convert this black-and-white footage to realistic color, maintaining the original lighting and shadows",
  "video_urls": ["https://your-cdn.com/vintage-footage.mp4"],
  "keep_original_sound": true,
  "duration": 0
}

Scenario 5: Lighting and mood shift

Adjust the lighting and color grading without changing the content.

{
  "model": "wan2.7-video-edit",
  "prompt": "Shift the lighting to warm golden hour, with long shadows and soft lens flare",
  "video_urls": ["https://your-cdn.com/outdoor-scene.mp4"],
  "keep_original_sound": true,
  "duration": 0
}

Pricing and cost math

Production patterns

When to use video edit vs re-generation

Prompt writing tips

• Be specific. "Make it look better" fails. "Convert to watercolor painting style with visible brushstrokes" works.
• Reference images help. When describing a target style or outfit, providing a reference image (image_urls) gives the model a concrete visual target.
• Preserve audio when needed. If the original clip has dialogue or music you want to keep, set keep_original_sound: true.
• Test with duration: 0 first. This keeps the original video length, which is the safest default for iteration.

FAQ

Can I chain multiple edits on the same clip?

Yes. Take the output of one edit and pass it as the input to the next. Each edit is an independent API call. Be aware that each pass adds quality degradation, so limit chains to 2-3 edits.

What video formats are supported?

Can I change the aspect ratio during editing?

The output will match the source video's aspect ratio by default. The model preserves the original composition.

Is this the same as Runway or Pika video editing?

Wan 2.7 Video Edit is an API — it doesn't have a visual editor UI. It's designed for developers building video editing into products, not for end-user creative tools. The advantage is programmatic control and batch processing at $0.086/sec.

Next steps

• Full 4-mode guide: Wan 2.7 API guide
• Compare versions: Wan 2.6 vs Wan 2.7
• Model playground: Wan 2.7 model page
• Family overview: Wan API family collection