1. Workflow Overview

This workflow generates e-commerce product videos from static images (e.g., jewelry, apparel), highlighting details and wearing effects. Key features:

• Image-to-Video (I2V): Converts product images into dynamic clips (e.g., subtle bracelet movement on a model's wrist).

• Smart Cropping: Auto-adjusts input aspect ratio (e.g., 350x350 → 832x480) for video output.

• Commercial-Grade Output: 30fps H.264 encoding (CRF19) balances quality and file size.

Core Models:

• Wan2.1-I2V-14B: Main video model (480P, bf16/fp8 mixed precision).

• UMT5-XXL Text Encoder: Processes Chinese product descriptions.

• CLIP Vision Encoder: Analyzes image composition/color.

2. Key Components

Critical Nodes:

1. WanVideoModelLoader:

   • Loads Wan2.1 model (Wan2_1-I2V-14B-480P_fp8_e4m3fn.safetensors) with sdpa attention optimization.

2. WanVideoTextEncode:

   • Input product prompts, e.g.:

     • Positive: "Bracelet showcase video, highlighting craftsmanship."

     • Negative: "low quality, blurry, distortion"

3. ImageScaleByAspectRatio V2:

   • Resizes input (e.g., 847b03d5...jpg) with letterbox padding.

4. WanVideoSampler:

   • Settings:

     • Steps: 25

     • Sampler: unipc (fast convergence)

     • Seed: Random (can fix to 773185989414318).

5. VHS_VideoCombine:

   • Exports 30fps MP4 (default: AnimateDiff.mp4).

Dependencies:

• Install ComfyUI-VideoHelperSuite.

• Download models to:

  • Main model: ComfyUI/models/wan_video

  • VAE: Wan2_1_VAE_bf16.safetensors

3. Workflow Structure

1. Model Loading:

   • Load video model, text encoder, VAE.

2. Input Processing (Operation Group):

   • Upload product image → Resize → CLIP encode.

3. Video Generation:

   • Fuse image features + text → Sampler → Latent frames.

4. Output:

   • Decode latent → MP4 synthesis (with metadata).

Key Parameters:

• Resolution: Fixed 480P (832x480 landscape).

• Frame Rate: 30fps (set in VHS_VideoCombine).

4. Input & Output

Input Parameters:

• Image: Square/vertical (e.g., 1440x1920), clear product focus.

• Text Prompt: Concise product highlights (Chinese preferred).

Output:

• 480P MP4 video (e.g., bracelet animation), saved to ComfyUI/output.

5. Notes

• VRAM: ≥12GB required (16GB recommended).

• Image Tips:

  • Clear subject, simple background (pre-cropped).

  • Avoid text/watermarks interfering with CLIP.

• Troubleshooting:

  • Choppy video? Reduce WanVideoSampler steps (e.g., 20).

  • Distortion? Check ImageScaleByAspectRatio mode is letterbox.