runway-core-workflow-b

Runway Core Workflow B

Overview

Image-to-video and video-to-video generation: animate still images and transform existing videos.

Prerequisites

• Completed runway-core-workflow-a

Instructions

Step 1: Image-to-Video

from runwayml import RunwayML
client = RunwayML()

# Animate a still image
task = client.image_to_video.create(
    model='gen3a_turbo',
    prompt_image='https://your-cdn.com/landscape.jpg',  # URL to source image
    prompt_text='Camera slowly pans right revealing mountains, gentle wind in trees',
    duration=5,
)
result = task.wait_for_task_output()
print(f"Animated video: {result.output[0]}")

Step 2: Image-to-Video with Data URI

import base64

# Load local image as data URI
with open('photo.jpg', 'rb') as f:
    image_data = base64.b64encode(f.read()).decode()
    data_uri = f"data:image/jpeg;base64,{image_data}"

task = client.image_to_video.create(
    model='gen3a_turbo',
    prompt_image=data_uri,
    prompt_text='Subtle motion, gentle camera push in, atmospheric lighting',
    duration=5,
)

Step 3: Video-to-Video (Style Transfer)

# Transform an existing video with a new style
task = client.video_to_video.create(
    model='gen3a_turbo',
    prompt_video='https://your-cdn.com/input-video.mp4',
    prompt_text='Transform to watercolor painting style, soft colors, artistic brushstrokes',
)
result = task.wait_for_task_output()
print(f"Styled video: {result.output[0]}")

Step 4: Image Specifications

Supported formats: JPEG, PNG, WebP
Supported resolutions:
  - Gen-3 Alpha Turbo: 1280x768 or 768x1280
  - Input images are automatically resized
Max file size: 16MB (URL), varies for data URI

Output

• Still images animated with motion prompts
• Local images encoded as data URIs
• Videos restyled with text prompts
• Proper image format handling

Error Handling

Error	Cause	Solution
400 Invalid image	Unsupported format	Use JPEG, PNG, or WebP
413 Image too large	File exceeds limit	Resize to under 16MB
Poor animation quality	Prompt doesn't describe motion	Add camera/motion keywords
Style transfer too subtle	Weak prompt	Be more specific about target style

Resources

• Runway API Reference
• Input Parameters
• SDKs

Next Steps

Error handling: runway-common-errors