feature: support qwen-image-edit(i2i) (#234)

* feature: support qwen-image-edit(i2i)

* bugfix

configs/qwen_image/qwen_image_i2i.json

+{
+    "seed": 42,
+    "batchsize": 1,
+    "num_channels_latents": 16,
+    "vae_scale_factor": 8,
+    "infer_steps": 50,
+    "guidance_embeds": false,
+    "num_images_per_prompt": 1,
+    "vae_latents_mean": [
+        -0.7571,
+        -0.7089,
+        -0.9113,
+        0.1075,
+        -0.1745,
+        0.9653,
+        -0.1517,
+        1.5508,
+        0.4134,
+        -0.0715,
+        0.5517,
+        -0.3632,
+        -0.1922,
+        -0.9497,
+        0.2503,
+        -0.2921
+      ],
+    "vae_latents_std": [
+        2.8184,
+        1.4541,
+        2.3275,
+        2.6558,
+        1.2196,
+        1.7708,
+        2.6052,
+        2.0743,
+        3.2687,
+        2.1526,
+        2.8652,
+        1.5579,
+        1.6382,
+        1.1253,
+        2.8251,
+        1.916
+    ],
+    "vae_z_dim": 16,
+    "feature_caching": "NoCaching",
+    "transformer_in_channels": 64,
+    "prompt_template_encode": "<|im_start|>system\nDescribe the key features of the input image (color, shape, size, texture, objects, background), then explain how the user's text instruction should alter or modify the image. Generate a new image that meets the user's requirements while maintaining consistency with the original input where appropriate.<|im_end|>\n<|im_start|>user\n<|vision_start|><|image_pad|><|vision_end|>{}<|im_end|>\n<|im_start|>assistant\n",
+    "prompt_template_encode_start_idx": 64,
+    "_auto_resize": true
+}

configs/qwen_image/qwen_image_t2i.json

@@ -52,5 +52,8 @@
         1.916
     ],
     "vae_z_dim": 16,
-    "feature_caching": "NoCaching"
+    "feature_caching": "NoCaching",
+    "prompt_template_encode": "<|im_start|>system\nDescribe the image by detailing the color, shape, size, texture, quantity, text, spatial relationships of the objects and background:<|im_end|>\n<|im_start|>user\n{}<|im_end|>\n<|im_start|>assistant\n",
+    "prompt_template_encode_start_idx": 34,
+    "_auto_resize": false
 }

lightx2v/infer.py

@@ -57,7 +57,7 @@ def main():
         default="wan2.1",
     )
 
-    parser.add_argument("--task", type=str, choices=["t2v", "i2v", "t2i", "flf2v"], default="t2v")
+    parser.add_argument("--task", type=str, choices=["t2v", "i2v", "t2i", "i2i", "flf2v"], default="t2v")
     parser.add_argument("--model_path", type=str, required=True)
     parser.add_argument("--config_json", type=str, required=True)
     parser.add_argument("--use_prompt_enhancer", action="store_true")

lightx2v/models/input_encoders/hf/qwen25/qwen25_vlforconditionalgeneration.py

+import math
 import os
 
 import torch
 from transformers import Qwen2Tokenizer, Qwen2_5_VLForConditionalGeneration
 
+try:
+    from diffusers.image_processor import VaeImageProcessor
+    from transformers import Qwen2VLProcessor
+except ImportError:
+    VaeImageProcessor = None
+    Qwen2VLProcessor = None
+
+PREFERRED_QWENIMAGE_RESOLUTIONS = [
+    (672, 1568),
+    (688, 1504),
+    (720, 1456),
+    (752, 1392),
+    (800, 1328),
+    (832, 1248),
+    (880, 1184),
+    (944, 1104),
+    (1024, 1024),
+    (1104, 944),
+    (1184, 880),
+    (1248, 832),
+    (1328, 800),
+    (1392, 752),
+    (1456, 720),
+    (1504, 688),
+    (1568, 672),
+]
+
+
+def calculate_dimensions(target_area, ratio):
+    width = math.sqrt(target_area * ratio)
+    height = width / ratio
+
+    width = round(width / 32) * 32
+    height = round(height / 32) * 32
+
+    return width, height, None
+
 
 class Qwen25_VLForConditionalGeneration_TextEncoder:
     def __init__(self, config):
@@ -11,8 +49,12 @@ class Qwen25_VLForConditionalGeneration_TextEncoder:
         self.tokenizer = Qwen2Tokenizer.from_pretrained(os.path.join(config.model_path, "tokenizer"))
 
         self.tokenizer_max_length = 1024
-        self.prompt_template_encode = "<|im_start|>system\nDescribe the image by detailing the color, shape, size, texture, quantity, text, spatial relationships of the objects and background:<|im_end|>\n<|im_start|>user\n{}<|im_end|>\n<|im_start|>assistant\n"
-        self.prompt_template_encode_start_idx = 34
+        self.prompt_template_encode = config.prompt_template_encode
+        self.prompt_template_encode_start_idx = config.prompt_template_encode_start_idx
+
+        if config.task == "i2i":
+            self.image_processor = VaeImageProcessor(vae_scale_factor=self.config["vae_scale_factor"] * 2)
+            self.processor = Qwen2VLProcessor.from_pretrained(os.path.join(config.model_path, "processor"))
 
         self.device = torch.device("cuda")
         self.dtype = torch.bfloat16
@@ -24,19 +66,63 @@ class Qwen25_VLForConditionalGeneration_TextEncoder:
         split_result = torch.split(selected, valid_lengths.tolist(), dim=0)
         return split_result
 
-    def infer(self, text):
+    def preprocess_image(self, image):
+        image_size = image.size
+        width, height = image_size
+        calculated_width, calculated_height, _ = calculate_dimensions(1024 * 1024, width / height)
+
+        height = height or calculated_height
+        width = width or calculated_width
+
+        multiple_of = self.config.vae_scale_factor * 2
+        width = width // multiple_of * multiple_of
+        height = height // multiple_of * multiple_of
+
+        if image is not None and not (isinstance(image, torch.Tensor) and image.size(1) == self.latent_channels):
+            image_height, image_width = self.image_processor.get_default_height_width(image)
+            aspect_ratio = image_width / image_height
+
+            if self.config._auto_resize:
+                _, image_width, image_height = min((abs(aspect_ratio - w / h), w, h) for w, h in PREFERRED_QWENIMAGE_RESOLUTIONS)
+            image_width = image_width // multiple_of * multiple_of
+            image_height = image_height // multiple_of * multiple_of
+            image = self.image_processor.resize(image, image_height, image_width)
+            prompt_image = image
+            image = self.image_processor.preprocess(image, image_height, image_width)
+            image = image.unsqueeze(2)
+        return prompt_image, image, (image_height, image_width)
+
+    def infer(self, text, image=None):
         template = self.prompt_template_encode
         drop_idx = self.prompt_template_encode_start_idx
         txt = [template.format(e) for e in text]
-        txt_tokens = self.tokenizer(txt, max_length=self.tokenizer_max_length + drop_idx, padding=True, truncation=True, return_tensors="pt").to(self.device)
 
+        if image is not None:
+            prompt_image, image, image_info = self.preprocess_image(image)
+            model_inputs = self.processor(
+                text=txt,
+                images=prompt_image,
+                padding=True,
+                return_tensors="pt",
+            ).to(self.device)
             encoder_hidden_states = self.text_encoder(
-            input_ids=txt_tokens.input_ids,
-            attention_mask=txt_tokens.attention_mask,
+                input_ids=model_inputs.input_ids,
+                attention_mask=model_inputs.attention_mask,
+                pixel_values=model_inputs.pixel_values,
+                image_grid_thw=model_inputs.image_grid_thw,
                 output_hidden_states=True,
             )
+        else:
+            prompt_image, image, image_info = None, None, None
+            model_inputs = self.tokenizer(txt, max_length=self.tokenizer_max_length + drop_idx, padding=True, truncation=True, return_tensors="pt").to(self.device)
+            encoder_hidden_states = self.text_encoder(
+                input_ids=model_inputs.input_ids,
+                attention_mask=model_inputs.attention_mask,
+                output_hidden_states=True,
+            )
+
         hidden_states = encoder_hidden_states.hidden_states[-1]
-        split_hidden_states = self._extract_masked_hidden(hidden_states, txt_tokens.attention_mask)
+        split_hidden_states = self._extract_masked_hidden(hidden_states, model_inputs.attention_mask)
         split_hidden_states = [e[drop_idx:] for e in split_hidden_states]
         attn_mask_list = [torch.ones(e.size(0), dtype=torch.long, device=e.device) for e in split_hidden_states]
         max_seq_len = max([e.size(0) for e in split_hidden_states])
@@ -51,4 +137,4 @@ class Qwen25_VLForConditionalGeneration_TextEncoder:
         prompt_embeds = prompt_embeds.view(self.config.batchsize * self.config.num_images_per_prompt, seq_len, -1)
         prompt_embeds_mask = prompt_embeds_mask.repeat(1, self.config.num_images_per_prompt, 1)
         prompt_embeds_mask = prompt_embeds_mask.view(self.config.batchsize * self.config.num_images_per_prompt, seq_len)
-        return prompt_embeds, prompt_embeds_mask
+        return prompt_embeds, prompt_embeds_mask, image, image_info

lightx2v/models/networks/qwen_image/infer/pre_infer.py

@@ -27,7 +27,6 @@ class QwenImagePreInfer:
             guidance = guidance.to(hidden_states.dtype) * 1000
 
         temb = self.time_text_embed(timestep, hidden_states) if guidance is None else self.time_text_embed(timestep, guidance, hidden_states)
-
         image_rotary_emb = self.pos_embed(img_shapes, txt_seq_lens, device=hidden_states.device)
 
         return hidden_states, encoder_hidden_states, encoder_hidden_states_mask, (hidden_states_0, temb, image_rotary_emb)

lightx2v/models/networks/qwen_image/model.py

@@ -53,6 +53,12 @@ class QwenImageTransformerModel:
     def infer(self, inputs):
         t = self.scheduler.timesteps[self.scheduler.step_index]
         latents = self.scheduler.latents
+        if self.config.task == "i2i":
+            image_latents = inputs["image_encoder_output"]["image_latents"]
+            latents_input = torch.cat([latents, image_latents], dim=1)
+        else:
+            latents_input = latents
+
         timestep = t.expand(latents.shape[0]).to(latents.dtype)
         img_shapes = self.scheduler.img_shapes
 
@@ -60,9 +66,8 @@ class QwenImageTransformerModel:
         prompt_embeds_mask = inputs["text_encoder_output"]["prompt_embeds_mask"]
 
         txt_seq_lens = prompt_embeds_mask.sum(dim=1).tolist() if prompt_embeds_mask is not None else None
-
         hidden_states, encoder_hidden_states, encoder_hidden_states_mask, pre_infer_out = self.pre_infer.infer(
-            hidden_states=latents,
+            hidden_states=latents_input,
             timestep=timestep / 1000,
             guidance=self.scheduler.guidance,
             encoder_hidden_states_mask=prompt_embeds_mask,
@@ -81,5 +86,7 @@ class QwenImageTransformerModel:
         )
 
         noise_pred = self.post_infer.infer(hidden_states, pre_infer_out[1])
+        if self.config.task == "i2i":
+            noise_pred = noise_pred[:, : latents.size(1)]
 
         self.scheduler.noise_pred = noise_pred

lightx2v/models/runners/qwen_image/qwen_image_runner.py

 import gc
+import math
 
 import torch
+from PIL import Image
 from loguru import logger
 
 from lightx2v.models.input_encoders.hf.qwen25.qwen25_vlforconditionalgeneration import Qwen25_VLForConditionalGeneration_TextEncoder
@@ -12,6 +14,16 @@ from lightx2v.utils.profiler import ProfilingContext
 from lightx2v.utils.registry_factory import RUNNER_REGISTER
 
 
+def calculate_dimensions(target_area, ratio):
+    width = math.sqrt(target_area * ratio)
+    height = width / ratio
+
+    width = round(width / 32) * 32
+    height = round(height / 32) * 32
+
+    return width, height, None
+
+
 @RUNNER_REGISTER("qwen_image")
 class QwenImageRunner(DefaultRunner):
     model_cpu_offload_seq = "text_encoder->transformer->vae"
@@ -51,12 +63,14 @@ class QwenImageRunner(DefaultRunner):
         self.run_dit = self._run_dit_local
         self.run_vae_decoder = self._run_vae_decoder_local
         if self.config["task"] == "t2i":
-            self.run_input_encoder = self._run_input_encoder_local_i2v
+            self.run_input_encoder = self._run_input_encoder_local_t2i
+        elif self.config["task"] == "i2i":
+            self.run_input_encoder = self._run_input_encoder_local_i2i
         else:
             assert NotImplementedError
 
     @ProfilingContext("Run Encoders")
-    def _run_input_encoder_local_i2v(self):
+    def _run_input_encoder_local_t2i(self):
         prompt = self.config["prompt_enhanced"] if self.config["use_prompt_enhancer"] else self.config["prompt"]
         text_encoder_output = self.run_text_encoder(prompt)
         torch.cuda.empty_cache()
@@ -66,20 +80,57 @@ class QwenImageRunner(DefaultRunner):
             "image_encoder_output": None,
         }
 
-    def run_text_encoder(self, text):
+    @ProfilingContext("Run Encoders")
+    def _run_input_encoder_local_i2i(self):
+        image = Image.open(self.config["image_path"])
+        prompt = self.config["prompt_enhanced"] if self.config["use_prompt_enhancer"] else self.config["prompt"]
+        text_encoder_output = self.run_text_encoder(prompt, image)
+        image_encoder_output = self.run_vae_encoder(image=text_encoder_output["preprocessed_image"])
+        image_encoder_output["image_info"] = text_encoder_output["image_info"]
+        torch.cuda.empty_cache()
+        gc.collect()
+        return {
+            "text_encoder_output": text_encoder_output,
+            "image_encoder_output": image_encoder_output,
+        }
+
+    def run_text_encoder(self, text, image=None):
         text_encoder_output = {}
-        prompt_embeds, prompt_embeds_mask = self.text_encoders[0].infer([text])
+        if self.config["task"] == "t2i":
+            prompt_embeds, prompt_embeds_mask, _, _ = self.text_encoders[0].infer([text])
+            text_encoder_output["prompt_embeds"] = prompt_embeds
+            text_encoder_output["prompt_embeds_mask"] = prompt_embeds_mask
+        elif self.config["task"] == "i2i":
+            prompt_embeds, prompt_embeds_mask, preprocessed_image, image_info = self.text_encoders[0].infer([text], image)
             text_encoder_output["prompt_embeds"] = prompt_embeds
             text_encoder_output["prompt_embeds_mask"] = prompt_embeds_mask
+            text_encoder_output["preprocessed_image"] = preprocessed_image
+            text_encoder_output["image_info"] = image_info
         return text_encoder_output
 
+    def run_vae_encoder(self, image):
+        image_latents = self.vae.encode_vae_image(image)
+        return {"image_latents": image_latents}
+
     def set_target_shape(self):
-        self.vae_scale_factor = self.vae.vae_scale_factor if getattr(self, "vae", None) else 8
+        if not self.config._auto_resize:
             width, height = self.config.aspect_ratios[self.config.aspect_ratio]
+        else:
+            image = Image.open(self.config.image_path).convert("RGB")
+            width, height = image.size
+            calculated_width, calculated_height, _ = calculate_dimensions(1024 * 1024, width / height)
+            height = height or calculated_height
+            width = width or calculated_width
+            multiple_of = self.vae.vae_scale_factor * 2
+            width = width // multiple_of * multiple_of
+            height = height // multiple_of * multiple_of
+            self.config.auto_width = width
+            self.config.auto_hight = height
+
         # VAE applies 8x compression on images but we must also account for packing which requires
         # latent height and width to be divisible by 2.
-        height = 2 * (int(height) // (self.vae_scale_factor * 2))
-        width = 2 * (int(width) // (self.vae_scale_factor * 2))
+        height = 2 * (int(height) // (self.vae.vae_scale_factor * 2))
+        width = 2 * (int(width) // (self.vae.vae_scale_factor * 2))
         num_channels_latents = self.model.in_channels // 4
         self.config.target_shape = (self.config.batchsize, 1, num_channels_latents, height, width)
 
@@ -96,9 +147,6 @@ class QwenImageRunner(DefaultRunner):
     def run_image_encoder(self):
         pass
 
-    def run_vae_encoder(self):
-        pass
-
     @ProfilingContext("Load models")
     def load_model(self):
         self.model = self.load_transformer()

lightx2v/models/schedulers/qwen_image/scheduler.py

@@ -129,10 +129,7 @@ class QwenImageScheduler(BaseScheduler):
 
     def prepare_latents(self):
         shape = self.config.target_shape
-        width, height = self.config.aspect_ratios[self.config.aspect_ratio]
-        self.vae_scale_factor = self.config.vae_scale_factor if getattr(self, "vae", None) else 8
-        height = 2 * (int(height) // (self.vae_scale_factor * 2))
-        width = 2 * (int(width) // (self.vae_scale_factor * 2))
+        width, height = shape[-1], shape[-2]
         latents = randn_tensor(shape, generator=self.generator, device=self.device, dtype=self.dtype)
         latents = self._pack_latents(latents, self.config.batchsize, self.config.num_channels_latents, height, width)
         latent_image_ids = self._prepare_latent_image_ids(self.config.batchsize, height // 2, width // 2, self.device, self.dtype)
@@ -175,14 +172,23 @@ class QwenImageScheduler(BaseScheduler):
             guidance = None
         self.guidance = guidance
 
-    def set_img_shapes(self):
+    def set_img_shapes(self, inputs):
+        if self.config.task == "t2i":
             width, height = self.config.aspect_ratios[self.config.aspect_ratio]
             self.img_shapes = [(1, height // self.config.vae_scale_factor // 2, width // self.config.vae_scale_factor // 2)] * self.config.batchsize
-
-    def prepare(self, image_encoder_output):
+        elif self.config.task == "i2i":
+            image_height, image_width = inputs["image_info"]
+            self.img_shapes = [
+                [
+                    (1, self.config.auto_hight // self.config.vae_scale_factor // 2, self.config.auto_width // self.config.vae_scale_factor // 2),
+                    (1, image_height // self.config.vae_scale_factor // 2, image_width // self.config.vae_scale_factor // 2),
+                ]
+            ]
+
+    def prepare(self, inputs):
         self.prepare_latents()
         self.prepare_guidance()
-        self.set_img_shapes()
+        self.set_img_shapes(inputs)
         self.set_timesteps()
 
     def step_post(self):

lightx2v/models/video_encoders/hf/qwen_image/vae.py

 import json
 import os
+from typing import Optional
 
 import torch
 
@@ -11,6 +12,18 @@ except ImportError:
     VaeImageProcessor = None
 
 
+# Copied from diffusers.pipelines.stable_diffusion.pipeline_stable_diffusion_img2img.retrieve_latents
+def retrieve_latents(encoder_output: torch.Tensor, generator: Optional[torch.Generator] = None, sample_mode: str = "sample"):
+    if hasattr(encoder_output, "latent_dist") and sample_mode == "sample":
+        return encoder_output.latent_dist.sample(generator)
+    elif hasattr(encoder_output, "latent_dist") and sample_mode == "argmax":
+        return encoder_output.latent_dist.mode()
+    elif hasattr(encoder_output, "latents"):
+        return encoder_output.latents
+    else:
+        raise AttributeError("Could not access latents of provided encoder_output")
+
+
 class AutoencoderKLQwenImageVAE:
     def __init__(self, config):
         self.config = config
@@ -19,27 +32,33 @@ class AutoencoderKLQwenImageVAE:
         with open(os.path.join(config.model_path, "vae", "config.json"), "r") as f:
             vae_config = json.load(f)
             self.vae_scale_factor = 2 ** len(vae_config["temperal_downsample"]) if "temperal_downsample" in vae_config else 8
+            self.generator = torch.Generator(device="cuda").manual_seed(config.seed)
         self.dtype = torch.bfloat16
+        self.device = torch.device("cuda")
+        self.latent_channels = config.vae_z_dim
 
     @staticmethod
     def _unpack_latents(latents, height, width, vae_scale_factor):
-        batch_size, num_patches, channels = latents.shape
+        batchsize, num_patches, channels = latents.shape
 
         # VAE applies 8x compression on images but we must also account for packing which requires
         # latent height and width to be divisible by 2.
         height = 2 * (int(height) // (vae_scale_factor * 2))
         width = 2 * (int(width) // (vae_scale_factor * 2))
 
-        latents = latents.view(batch_size, height // 2, width // 2, channels // 4, 2, 2)
+        latents = latents.view(batchsize, height // 2, width // 2, channels // 4, 2, 2)
         latents = latents.permute(0, 3, 1, 4, 2, 5)
 
-        latents = latents.reshape(batch_size, channels // (2 * 2), 1, height, width)
+        latents = latents.reshape(batchsize, channels // (2 * 2), 1, height, width)
 
         return latents
 
     @torch.no_grad()
     def decode(self, latents):
+        if self.config.task == "t2i":
             width, height = self.config.aspect_ratios[self.config.aspect_ratio]
+        elif self.config.task == "i2i":
+            width, height = self.config.auto_width, self.config.auto_hight
         latents = self._unpack_latents(latents, height, width, self.config.vae_scale_factor)
         latents = latents.to(self.dtype)
         latents_mean = torch.tensor(self.config.vae_latents_mean).view(1, self.config.vae_z_dim, 1, 1, 1).to(latents.device, latents.dtype)
@@ -48,3 +67,43 @@ class AutoencoderKLQwenImageVAE:
         images = self.model.decode(latents, return_dict=False)[0][:, :, 0]
         images = self.image_processor.postprocess(images, output_type="pil")
         return images
+
+    @staticmethod
+    # Copied from diffusers.pipelines.qwenimage.pipeline_qwenimage.QwenImagePipeline._pack_latents
+    def _pack_latents(latents, batchsize, num_channels_latents, height, width):
+        latents = latents.view(batchsize, num_channels_latents, height // 2, 2, width // 2, 2)
+        latents = latents.permute(0, 2, 4, 1, 3, 5)
+        latents = latents.reshape(batchsize, (height // 2) * (width // 2), num_channels_latents * 4)
+        return latents
+
+    def _encode_vae_image(self, image: torch.Tensor, generator: torch.Generator):
+        if isinstance(generator, list):
+            image_latents = [retrieve_latents(self.model.encode(image[i : i + 1]), generator=generator[i], sample_mode="argmax") for i in range(image.shape[0])]
+            image_latents = torch.cat(image_latents, dim=0)
+        else:
+            image_latents = retrieve_latents(self.model.encode(image), generator=generator, sample_mode="argmax")
+        latents_mean = torch.tensor(self.model.config.latents_mean).view(1, self.latent_channels, 1, 1, 1).to(image_latents.device, image_latents.dtype)
+        latents_std = torch.tensor(self.model.config.latents_std).view(1, self.latent_channels, 1, 1, 1).to(image_latents.device, image_latents.dtype)
+        image_latents = (image_latents - latents_mean) / latents_std
+
+        return image_latents
+
+    def encode_vae_image(self, image):
+        num_channels_latents = self.config.transformer_in_channels // 4
+        image = image.to(self.device).to(self.dtype)
+        if image.shape[1] != self.latent_channels:
+            image_latents = self._encode_vae_image(image=image, generator=self.generator)
+        else:
+            image_latents = image
+        if self.config.batchsize > image_latents.shape[0] and self.config.batchsize % image_latents.shape[0] == 0:
+            # expand init_latents for batchsize
+            additional_image_per_prompt = self.config.batchsize // image_latents.shape[0]
+            image_latents = torch.cat([image_latents] * additional_image_per_prompt, dim=0)
+        elif self.config.batchsize > image_latents.shape[0] and self.config.batchsize % image_latents.shape[0] != 0:
+            raise ValueError(f"Cannot duplicate `image` of batch size {image_latents.shape[0]} to {self.config.batchsize} text prompts.")
+        else:
+            image_latents = torch.cat([image_latents], dim=0)
+
+        image_latent_height, image_latent_width = image_latents.shape[3:]
+        image_latents = self._pack_latents(image_latents, self.config.batchsize, num_channels_latents, image_latent_height, image_latent_width)
+        return image_latents

scripts/qwen_image/qwen_image_i2i.sh

+#!/bin/bash
+export CUDA_VISIBLE_DEVICES=
+
+# set path and first
+export lightx2v_path=
+export model_path=
+
+# check section
+if [ -z "${CUDA_VISIBLE_DEVICES}" ]; then
+    cuda_devices=0
+    echo "Warn: CUDA_VISIBLE_DEVICES is not set, using default value: ${cuda_devices}, change at shell script or set env variable."
+    export CUDA_VISIBLE_DEVICES=${cuda_devices}
+fi
+
+if [ -z "${lightx2v_path}" ]; then
+    echo "Error: lightx2v_path is not set. Please set this variable first."
+    exit 1
+fi
+
+if [ -z "${model_path}" ]; then
+    echo "Error: model_path is not set. Please set this variable first."
+    exit 1
+fi
+
+export TOKENIZERS_PARALLELISM=false
+
+export PYTHONPATH=${lightx2v_path}:$PYTHONPATH
+export DTYPE=BF16
+export ENABLE_PROFILING_DEBUG=true
+export ENABLE_GRAPH_MODE=false
+
+
+python -m lightx2v.infer \
+    --model_cls qwen_image \
+    --task i2i \
+    --model_path $model_path \
+    --config_json ${lightx2v_path}/configs/qwen_image/qwen_image_i2i.json \
+    --prompt "Change the rabbit's color to purple, with a flash light background." \
+    --image_path input.jpg \
+    --save_video_path ${lightx2v_path}/save_results/qwen_image_i2i.png