66 lines
2.1 KiB
Markdown
66 lines
2.1 KiB
Markdown
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# Image-To-Video
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Source <https://github.com/vllm-project/vllm-omni/tree/main/examples/offline_inference/image_to_video>.
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This example demonstrates how to generate videos from images using Wan2.2 Image-to-Video models with vLLM-Omni's offline inference API.
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## Local CLI Usage
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### Wan2.2-I2V-A14B-Diffusers (MoE)
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```bash
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python image_to_video.py \
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--model Wan-AI/Wan2.2-I2V-A14B-Diffusers \
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--image input.png \
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--prompt "A cat playing with yarn, smooth motion" \
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--negative_prompt "<optional quality filter>" \
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--height 480 \
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--width 832 \
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--num_frames 48 \
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--guidance_scale 5.0 \
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--guidance_scale_high 6.0 \
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--num_inference_steps 40 \
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--boundary_ratio 0.875 \
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--flow_shift 12.0 \
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--fps 16 \
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--output i2v_output.mp4
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```
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### Wan2.2-TI2V-5B-Diffusers (Unified)
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```bash
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python image_to_video.py \
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--model Wan-AI/Wan2.2-TI2V-5B-Diffusers \
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--image input.png \
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--prompt "A cat playing with yarn, smooth motion" \
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--negative_prompt "<optional quality filter>" \
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--height 480 \
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--width 832 \
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--num_frames 48 \
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--guidance_scale 4.0 \
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--num_inference_steps 40 \
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--flow_shift 12.0 \
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--fps 16 \
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--output i2v_output.mp4
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```
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Key arguments:
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- `--model`: Model ID (I2V-A14B for MoE, TI2V-5B for unified T2V+I2V).
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- `--image`: Path to input image (required).
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- `--prompt`: Text description of desired motion/animation.
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- `--height/--width`: Output resolution (auto-calculated from image if not set). Dimensions should be multiples of 16.
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- `--num_frames`: Number of frames (default 81).
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- `--guidance_scale` and `--guidance_scale_high`: CFG scale (applied to low/high-noise stages for MoE).
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- `--negative_prompt`: Optional list of artifacts to suppress.
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- `--boundary_ratio`: Boundary split ratio for two-stage MoE models.
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- `--flow_shift`: Scheduler flow shift (5.0 for 720p, 12.0 for 480p).
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- `--num_inference_steps`: Number of denoising steps (default 50).
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- `--fps`: Frames per second for the saved MP4 (requires `diffusers` export_to_video).
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- `--output`: Path to save the generated video.
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## Example materials
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??? abstract "image_to_video.py"
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``````py
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--8<-- "examples/offline_inference/image_to_video/image_to_video.py"
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``````
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