[Doc] [skip ci]Sync. (#1363)

Signed-off-by: Alicia <115451386+congw729@users.noreply.github.com>
Co-authored-by: Yueqian Lin <70319226+linyueqian@users.noreply.github.com>

docs/user_guide/examples/online_serving/image_to_video.md

@@ -0,0 +1,97 @@
+# Image-To-Video
+
+Source <https://github.com/vllm-project/vllm-omni/tree/main/examples/online_serving/image_to_video>.
+
+
+This example demonstrates how to deploy the Wan2.2 image-to-video model for online video generation using vLLM-Omni.
+
+## Start Server
+
+### Basic Start
+
+```bash
+vllm serve Wan-AI/Wan2.2-I2V-A14B-Diffusers --omni --port 8091
+```
+
+### Start with Parameters
+
+Or use the startup script:
+
+```bash
+bash run_server.sh
+```
+
+The script allows overriding:
+- `MODEL` (default: `Wan-AI/Wan2.2-I2V-A14B-Diffusers`)
+- `PORT` (default: `8091`)
+- `BOUNDARY_RATIO` (default: `0.875`)
+- `FLOW_SHIFT` (default: `12.0`)
+- `CACHE_BACKEND` (default: `none`)
+- `ENABLE_CACHE_DIT_SUMMARY` (default: `0`)
+
+## API Calls
+
+### Method 1: Using curl
+
+```bash
+# Basic image-to-video generation
+bash run_curl_image_to_video.sh
+
+# Or execute directly (OpenAI-style multipart)
+curl -X POST http://localhost:8091/v1/videos \
+  -H "Accept: application/json" \
+  -F "prompt=A bear playing with yarn, smooth motion" \
+  -F "negative_prompt=low quality, blurry, static" \
+  -F "input_reference=@/path/to/qwen-bear.png" \
+  -F "width=832" \
+  -F "height=480" \
+  -F "num_frames=33" \
+  -F "fps=16" \
+  -F "num_inference_steps=40" \
+  -F "guidance_scale=1.0" \
+  -F "guidance_scale_2=1.0" \
+  -F "boundary_ratio=0.875" \
+  -F "flow_shift=12.0" \
+  -F "seed=42" | jq -r '.data[0].b64_json' | base64 -d > wan22_i2v_output.mp4
+```
+
+## Request Format
+
+### Required Fields
+
+```bash
+curl -X POST http://localhost:8091/v1/videos \
+  -F "prompt=A bear playing with yarn, smooth motion" \
+  -F "negative_prompt=low quality, blurry, static" \
+  -F "input_reference=@/path/to/qwen-bear.png"
+```
+
+### Generation with Parameters
+
+```bash
+curl -X POST http://localhost:8091/v1/videos \
+  -F "prompt=A bear playing with yarn, smooth motion" \
+  -F "negative_prompt=low quality, blurry, static" \
+  -F "input_reference=@/path/to/qwen-bear.png" \
+  -F "width=832" \
+  -F "height=480" \
+  -F "num_frames=33" \
+  -F "fps=16" \
+  -F "num_inference_steps=40" \
+  -F "guidance_scale=1.0" \
+  -F "guidance_scale_2=1.0" \
+  -F "boundary_ratio=0.875" \
+  -F "flow_shift=12.0" \
+  -F "seed=42"
+```
+
+## Example materials
+
+??? abstract "run_curl_image_to_video.sh"
+    ``````sh
+    --8<-- "examples/online_serving/image_to_video/run_curl_image_to_video.sh"
+    ``````
+??? abstract "run_server.sh"
+    ``````sh
+    --8<-- "examples/online_serving/image_to_video/run_server.sh"
+    ``````