Support convert weight to diffusers.

configs/wan_i2v.json

@@ -7,6 +7,8 @@
     "seed": 42,
     "sample_guide_scale": 5,
     "sample_shift": 5,
+    "enable_cfg": true,
+    "cpu_offload": false,
     "mm_config": {
         "mm_type": "W-fp8-channel-sym-A-fp8-channel-sym-dynamic-Sgl",
         "weight_auto_quant": true

examples/diffusers/converter.py

+import os
+import re
+import glob
+import json
+import argparse
+import torch
+from safetensors import safe_open, torch as st
+from loguru import logger
+from tqdm import tqdm
+
+
+def get_key_mapping_rules(direction, model_type):
+    if model_type == "wan":
+        unified_rules = [
+            {"forward": (r"^head\.head$", "proj_out"), "backward": (r"^proj_out$", "head.head")},
+            {"forward": (r"^head\.modulation$", "scale_shift_table"), "backward": (r"^scale_shift_table$", "head.modulation")},
+            {"forward": (r"^text_embedding\.0\.", "condition_embedder.text_embedder.linear_1."), "backward": (r"^condition_embedder.text_embedder.linear_1\.", "text_embedding.0.")},
+            {"forward": (r"^text_embedding\.2\.", "condition_embedder.text_embedder.linear_2."), "backward": (r"^condition_embedder.text_embedder.linear_2\.", "text_embedding.2.")},
+            {"forward": (r"^time_embedding\.0\.", "condition_embedder.time_embedder.linear_1."), "backward": (r"^condition_embedder.time_embedder.linear_1\.", "time_embedding.0.")},
+            {"forward": (r"^time_embedding\.2\.", "condition_embedder.time_embedder.linear_2."), "backward": (r"^condition_embedder.time_embedder.linear_2\.", "time_embedding.2.")},
+            {"forward": (r"^time_projection\.1\.", "condition_embedder.time_proj."), "backward": (r"^condition_embedder.time_proj\.", "time_projection.1.")},
+            {"forward": (r"blocks\.(\d+)\.self_attn\.q\.", r"blocks.\1.attn1.to_q."), "backward": (r"blocks\.(\d+)\.attn1\.to_q\.", r"blocks.\1.self_attn.q.")},
+            {"forward": (r"blocks\.(\d+)\.self_attn\.k\.", r"blocks.\1.attn1.to_k."), "backward": (r"blocks\.(\d+)\.attn1\.to_k\.", r"blocks.\1.self_attn.k.")},
+            {"forward": (r"blocks\.(\d+)\.self_attn\.v\.", r"blocks.\1.attn1.to_v."), "backward": (r"blocks\.(\d+)\.attn1\.to_v\.", r"blocks.\1.self_attn.v.")},
+            {"forward": (r"blocks\.(\d+)\.self_attn\.o\.", r"blocks.\1.attn1.to_out.0."), "backward": (r"blocks\.(\d+)\.attn1\.to_out\.0\.", r"blocks.\1.self_attn.o.")},
+            {"forward": (r"blocks\.(\d+)\.cross_attn\.q\.", r"blocks.\1.attn2.to_q."), "backward": (r"blocks\.(\d+)\.attn2\.to_q\.", r"blocks.\1.cross_attn.q.")},
+            {"forward": (r"blocks\.(\d+)\.cross_attn\.k\.", r"blocks.\1.attn2.to_k."), "backward": (r"blocks\.(\d+)\.attn2\.to_k\.", r"blocks.\1.cross_attn.k.")},
+            {"forward": (r"blocks\.(\d+)\.cross_attn\.v\.", r"blocks.\1.attn2.to_v."), "backward": (r"blocks\.(\d+)\.attn2\.to_v\.", r"blocks.\1.cross_attn.v.")},
+            {"forward": (r"blocks\.(\d+)\.cross_attn\.o\.", r"blocks.\1.attn2.to_out.0."), "backward": (r"blocks\.(\d+)\.attn2\.to_out\.0\.", r"blocks.\1.cross_attn.o.")},
+            {"forward": (r"blocks\.(\d+)\.norm3\.", r"blocks.\1.norm2."), "backward": (r"blocks\.(\d+)\.norm2\.", r"blocks.\1.norm3.")},
+            {"forward": (r"blocks\.(\d+)\.ffn\.0\.", r"blocks.\1.ffn.net.0.proj."), "backward": (r"blocks\.(\d+)\.ffn\.net\.0\.proj\.", r"blocks.\1.ffn.0.")},
+            {"forward": (r"blocks\.(\d+)\.ffn\.2\.", r"blocks.\1.ffn.net.2."), "backward": (r"blocks\.(\d+)\.ffn\.net\.2\.", r"blocks.\1.ffn.2.")},
+            {"forward": (r"blocks\.(\d+)\.modulation\.", r"blocks.\1.scale_shift_table."), "backward": (r"blocks\.(\d+)\.scale_shift_table(?=\.|$)", r"blocks.\1.modulation")},
+            {"forward": (r"blocks\.(\d+)\.cross_attn\.k_img\.", r"blocks.\1.attn2.add_k_proj."), "backward": (r"blocks\.(\d+)\.attn2\.add_k_proj\.", r"blocks.\1.cross_attn.k_img.")},
+            {"forward": (r"blocks\.(\d+)\.cross_attn\.v_img\.", r"blocks.\1.attn2.add_v_proj."), "backward": (r"blocks\.(\d+)\.attn2\.add_v_proj\.", r"blocks.\1.cross_attn.v_img.")},
+            {
+                "forward": (r"blocks\.(\d+)\.cross_attn\.norm_k_img\.weight", r"blocks.\1.attn2.norm_added_k.weight"),
+                "backward": (r"blocks\.(\d+)\.attn2\.norm_added_k\.weight", r"blocks.\1.cross_attn.norm_k_img.weight"),
+            },
+            {"forward": (r"img_emb\.proj\.0\.", r"condition_embedder.image_embedder.norm1."), "backward": (r"condition_embedder\.image_embedder\.norm1\.", r"img_emb.proj.0.")},
+            {"forward": (r"img_emb\.proj\.1\.", r"condition_embedder.image_embedder.ff.net.0.proj."), "backward": (r"condition_embedder\.image_embedder\.ff\.net\.0\.proj\.", r"img_emb.proj.1.")},
+            {"forward": (r"img_emb\.proj\.3\.", r"condition_embedder.image_embedder.ff.net.2."), "backward": (r"condition_embedder\.image_embedder\.ff\.net\.2\.", r"img_emb.proj.3.")},
+            {"forward": (r"img_emb\.proj\.4\.", r"condition_embedder.image_embedder.norm2."), "backward": (r"condition_embedder\.image_embedder\.norm2\.", r"img_emb.proj.4.")},
+            {"forward": (r"blocks\.(\d+)\.self_attn\.norm_q\.weight", r"blocks.\1.attn1.norm_q.weight"), "backward": (r"blocks\.(\d+)\.attn1\.norm_q\.weight", r"blocks.\1.self_attn.norm_q.weight")},
+            {"forward": (r"blocks\.(\d+)\.self_attn\.norm_k\.weight", r"blocks.\1.attn1.norm_k.weight"), "backward": (r"blocks\.(\d+)\.attn1\.norm_k\.weight", r"blocks.\1.self_attn.norm_k.weight")},
+            {"forward": (r"blocks\.(\d+)\.cross_attn\.norm_q\.weight", r"blocks.\1.attn2.norm_q.weight"), "backward": (r"blocks\.(\d+)\.attn2\.norm_q\.weight", r"blocks.\1.cross_attn.norm_q.weight")},
+            {"forward": (r"blocks\.(\d+)\.cross_attn\.norm_k\.weight", r"blocks.\1.attn2.norm_k.weight"), "backward": (r"blocks\.(\d+)\.attn2\.norm_k\.weight", r"blocks.\1.cross_attn.norm_k.weight")},
+            # head projection mapping
+            {"forward": (r"^head\.head\.", "proj_out."), "backward": (r"^proj_out\.", "head.head.")},
+        ]
+
+        if direction == "forward":
+            return [rule["forward"] for rule in unified_rules]
+        elif direction == "backward":
+            return [rule["backward"] for rule in unified_rules]
+        else:
+            raise ValueError(f"Invalid direction: {direction}")
+    else:
+        raise ValueError(f"Unsupported model type: {model_type}")
+
+
+def convert_weights(args):
+    if os.path.isdir(args.source):
+        src_files = glob.glob(os.path.join(args.source, "*.safetensors"), recursive=True)
+    elif args.source.endswith((".pth", ".safetensors", "pt")):
+        src_files = [args.source]
+    else:
+        raise ValueError("Invalid input path")
+
+    merged_weights = {}
+    logger.info(f"Processing source files: {src_files}")
+    for file_path in tqdm(src_files, desc="Loading weights"):
+        logger.info(f"Loading weights from: {file_path}")
+        if file_path.endswith(".pt") or file_path.endswith(".pth"):
+            weights = torch.load(file_path, map_location="cpu", weights_only=True)
+        elif file_path.endswith(".safetensors"):
+            with safe_open(file_path, framework="pt") as f:
+                weights = {k: f.get_tensor(k) for k in f.keys()}
+
+        duplicate_keys = set(weights.keys()) & set(merged_weights.keys())
+        if duplicate_keys:
+            raise ValueError(f"Duplicate keys found: {duplicate_keys} in file {file_path}")
+        merged_weights.update(weights)
+
+    rules = get_key_mapping_rules(args.direction, args.model_type)
+    converted_weights = {}
+    logger.info("Converting keys...")
+    for key in tqdm(merged_weights.keys(), desc="Converting keys"):
+        new_key = key
+        for pattern, replacement in rules:
+            new_key = re.sub(pattern, replacement, new_key)
+        converted_weights[new_key] = merged_weights[key]
+
+    os.makedirs(args.output, exist_ok=True)
+
+    base_name = os.path.splitext(os.path.basename(args.source))[0] if args.source.endswith((".pth", ".safetensors")) else "converted_model"
+
+    index = {"metadata": {"total_size": 0}, "weight_map": {}}
+
+    chunk_idx = 0
+    current_chunk = {}
+    for idx, (k, v) in tqdm(enumerate(converted_weights.items()), desc="Saving chunks"):
+        current_chunk[k] = v
+        if (idx + 1) % args.chunk_size == 0 and args.chunk_size > 0:
+            output_filename = f"{base_name}_part{chunk_idx}.safetensors"
+            output_path = os.path.join(args.output, output_filename)
+            logger.info(f"Saving chunk to: {output_path}")
+            st.save_file(current_chunk, output_path)
+            for key in current_chunk:
+                index["weight_map"][key] = output_filename
+            index["metadata"]["total_size"] += os.path.getsize(output_path)
+            current_chunk = {}
+            chunk_idx += 1
+
+    if current_chunk:
+        output_filename = f"{base_name}_part{chunk_idx}.safetensors"
+        output_path = os.path.join(args.output, output_filename)
+        logger.info(f"Saving final chunk to: {output_path}")
+        st.save_file(current_chunk, output_path)
+        for key in current_chunk:
+            index["weight_map"][key] = output_filename
+        index["metadata"]["total_size"] += os.path.getsize(output_path)
+
+    # Save index file
+    index_path = os.path.join(args.output, "diffusion_pytorch_model.safetensors.index.json")
+    with open(index_path, "w", encoding="utf-8") as f:
+        json.dump(index, f, indent=2)
+    logger.info(f"Index file written to: {index_path}")
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Model weight format converter")
+    parser.add_argument("-s", "--source", required=True, help="Input path (file or directory)")
+    parser.add_argument("-o", "--output", required=True, help="Output directory path")
+    parser.add_argument("-d", "--direction", choices=["forward", "backward"], default="forward", help="Conversion direction: forward = 'lightx2v' -> 'Diffusers', backward = reverse")
+    parser.add_argument("-c", "--chunk-size", type=int, default=100, help="Chunk size for saving (only applies to forward), 0 = no chunking")
+    parser.add_argument("-t", "--model_type", choices=["wan"], default="wan", help="Model type")
+
+    args = parser.parse_args()
+
+    if os.path.isfile(args.output):
+        raise ValueError("Output path must be a directory, not a file")
+
+    logger.info("Starting model weight conversion...")
+    convert_weights(args)
+    logger.info(f"Conversion completed! Files saved to: {args.output}")
+
+
+if __name__ == "__main__":
+    main()

lightx2v/api_server.py

@@ -4,6 +4,7 @@ import psutil
 import argparse
 from fastapi import FastAPI, Request
 from pydantic import BaseModel
+from loguru import logger
 import uvicorn
 import json
 import asyncio
@@ -26,15 +27,15 @@ def kill_all_related_processes():
         try:
             child.kill()
         except Exception as e:
-            print(f"Failed to kill child process {child.pid}: {e}")
+            logger.info(f"Failed to kill child process {child.pid}: {e}")
     try:
         current_process.kill()
     except Exception as e:
-        print(f"Failed to kill main process: {e}")
+        logger.info(f"Failed to kill main process: {e}")
 
 
 def signal_handler(sig, frame):
-    print("\nReceived Ctrl+C, shutting down all related processes...")
+    logger.info("\nReceived Ctrl+C, shutting down all related processes...")
     kill_all_related_processes()
     sys.exit(0)
 
@@ -79,11 +80,11 @@ if __name__ == "__main__":
     parser.add_argument("--config_json", type=str, required=True)
     parser.add_argument("--port", type=int, default=8000)
     args = parser.parse_args()
-    print(f"args: {args}")
+    logger.info(f"args: {args}")
 
     with ProfilingContext("Init Server Cost"):
         config = set_config(args)
-        print(f"config:\n{json.dumps(config, ensure_ascii=False, indent=4)}")
+        logger.info(f"config:\n{json.dumps(config, ensure_ascii=False, indent=4)}")
         runner = init_runner(config)
 
     uvicorn.run(app, host="0.0.0.0", port=config.port, reload=False, workers=1)

lightx2v/attentions/distributed/comm/ring_comm.py

 from typing import Optional
+from loguru import logger
 import torch
 import torch.distributed as dist
 
@@ -21,7 +22,7 @@ class RingComm:
     def send_recv(self, to_send: torch.Tensor, recv_tensor: Optional[torch.Tensor] = None) -> torch.Tensor:
         if recv_tensor is None:
             res = torch.empty_like(to_send)
-            # print(f"send_recv: empty_like {to_send.shape}")
+            # logger.info(f"send_recv: empty_like {to_send.shape}")
         else:
             res = recv_tensor
 

lightx2v/attentions/distributed/partial_heads_attn/tests/test_acc.py

@@ -2,6 +2,7 @@ import torch
 import torch.distributed as dist
 from lightx2v.attentions import attention
 from lightx2v.utils.utils import seed_all
+from loguru import logger
 
 
 seed_all(42)
@@ -65,10 +66,10 @@ def test_part_head():
     # 验证结果一致性
     if cur_rank == 0:
         # import pdb; pdb.set_trace()
-        print("Outputs match:", torch.allclose(single_gpu_output, combined_output, rtol=1e-3, atol=1e-3))
+        logger.info("Outputs match:", torch.allclose(single_gpu_output, combined_output, rtol=1e-3, atol=1e-3))
 
     # # 验证结果一致性
-    # print("Outputs match:", torch.allclose(single_gpu_output, combined_output, rtol=1e-3, atol=1e-3))
+    # logger.info("Outputs match:", torch.allclose(single_gpu_output, combined_output, rtol=1e-3, atol=1e-3))
 
 
 if __name__ == "__main__":

lightx2v/common/backend_infer/trt/common.py

@@ -20,6 +20,7 @@ import os
 
 import tensorrt as trt
 from .common_runtime import *
+from loguru import logger
 
 try:
     # Sometimes python does not understand FileNotFoundError
@@ -67,11 +68,11 @@ def find_sample_data(description="Runs a TensorRT Python sample", subfolder="",
         data_path = os.path.join(data_dir, subfolder)
         if not os.path.exists(data_path):
             if data_dir != kDEFAULT_DATA_ROOT:
-                print("WARNING: " + data_path + " does not exist. Trying " + data_dir + " instead.")
+                logger.info("WARNING: " + data_path + " does not exist. Trying " + data_dir + " instead.")
             data_path = data_dir
         # Make sure data directory exists.
         if not (os.path.exists(data_path)) and data_dir != kDEFAULT_DATA_ROOT:
-            print("WARNING: {:} does not exist. Please provide the correct data path with the -d option.".format(data_path))
+            logger.info("WARNING: {:} does not exist. Please provide the correct data path with the -d option.".format(data_path))
         return data_path
 
     data_paths = [get_data_path(data_dir) for data_dir in args.datadir]

lightx2v/common/ops/mm/mm_weight.py

@@ -4,6 +4,7 @@ from vllm import _custom_ops as ops
 import sgl_kernel
 from lightx2v.utils.registry_factory import MM_WEIGHT_REGISTER
 from lightx2v.utils.quant_utils import IntegerQuantizer, FloatQuantizer
+from loguru import logger
 
 try:
     import q8_kernels.functional as Q8F
@@ -461,7 +462,7 @@ if __name__ == "__main__":
     mm_weight.load(weight_dict)
     input_tensor = torch.randn(1024, 4096).to(torch.bfloat16).cuda()
     output_tensor = mm_weight.apply(input_tensor)
-    print(output_tensor.shape)
+    logger.info(output_tensor.shape)
 
     weight_dict = {
         "xx.weight": torch.randn(8192, 4096),
@@ -473,7 +474,7 @@ if __name__ == "__main__":
     mm_weight.load(weight_dict)
     input_tensor = torch.randn(1024, 4096).to(torch.bfloat16).cuda()
     output_tensor = mm_weight.apply(input_tensor)
-    print(output_tensor.shape)
+    logger.info(output_tensor.shape)
 
     weight_dict = {
         "xx.weight": torch.randn(8192, 4096),
@@ -485,4 +486,4 @@ if __name__ == "__main__":
     mm_weight.load(weight_dict)
     input_tensor = torch.randn(1024, 4096).to(torch.bfloat16).cuda()
     output_tensor = mm_weight.apply(input_tensor)
-    print(output_tensor.shape)
+    logger.info(output_tensor.shape)

lightx2v/infer.py

@@ -15,6 +15,7 @@ from lightx2v.models.runners.wan.wan_causal_runner import WanCausalRunner
 from lightx2v.models.runners.graph_runner import GraphRunner
 
 from lightx2v.common.ops import *
+from loguru import logger
 
 
 def init_runner(config):
@@ -37,17 +38,17 @@ if __name__ == "__main__":
     parser.add_argument("--task", type=str, choices=["t2v", "i2v"], default="t2v")
     parser.add_argument("--model_path", type=str, required=True)
     parser.add_argument("--config_json", type=str, required=True)
-
+    parser.add_argument("--enable_cfg", type=bool, default=False)
     parser.add_argument("--prompt", type=str, required=True)
     parser.add_argument("--negative_prompt", type=str, default="")
     parser.add_argument("--image_path", type=str, default="", help="The path to input image file or path for image-to-video (i2v) task")
     parser.add_argument("--save_video_path", type=str, default="./output_lightx2v.mp4", help="The path to save video path/file")
     args = parser.parse_args()
-    print(f"args: {args}")
+    logger.info(f"args: {args}")
 
     with ProfilingContext("Total Cost"):
         config = set_config(args)
-        print(f"config:\n{json.dumps(config, ensure_ascii=False, indent=4)}")
+        logger.info(f"config:\n{json.dumps(config, ensure_ascii=False, indent=4)}")
         runner = init_runner(config)
 
         runner.run_pipeline()

lightx2v/models/input_encoders/hf/clip/model.py

 import torch
 from transformers import CLIPTextModel, AutoTokenizer
+from loguru import logger
 
 
 class TextEncoderHFClipModel:
@@ -54,4 +55,4 @@ if __name__ == "__main__":
     model = TextEncoderHFClipModel(model_path, torch.device("cuda"))
     text = "A cat walks on the grass, realistic style."
     outputs = model.infer(text)
-    print(outputs)
+    logger.info(outputs)

lightx2v/models/input_encoders/hf/llama/model.py

 import torch
 from transformers import AutoModel, AutoTokenizer
+from loguru import logger
 
 
 class TextEncoderHFLlamaModel:
@@ -67,4 +68,4 @@ if __name__ == "__main__":
     model = TextEncoderHFLlamaModel(model_path, torch.device("cuda"))
     text = "A cat walks on the grass, realistic style."
     outputs = model.infer(text)
-    print(outputs)
+    logger.info(outputs)

lightx2v/models/input_encoders/hf/llava/model.py

@@ -3,6 +3,7 @@ from PIL import Image
 import numpy as np
 import torchvision.transforms as transforms
 from transformers import LlavaForConditionalGeneration, CLIPImageProcessor, AutoTokenizer
+from loguru import logger
 
 
 def generate_crop_size_list(base_size=256, patch_size=32, max_ratio=4.0):
@@ -158,4 +159,4 @@ if __name__ == "__main__":
     img_path = "/mtc/yongyang/projects/lightx2v/assets/inputs/imgs/img_1.jpg"
     img = Image.open(img_path).convert("RGB")
     outputs = model.infer(text, img, None)
-    print(outputs)
+    logger.info(outputs)

lightx2v/models/input_encoders/hf/t5/model.py

@@ -8,6 +8,7 @@ import torch.nn as nn
 import torch.nn.functional as F
 
 from .tokenizer import HuggingfaceTokenizer
+from loguru import logger
 
 __all__ = [
     "T5Model",
@@ -522,4 +523,4 @@ if __name__ == "__main__":
     )
     text = "Two anthropomorphic cats in comfy boxing gear and bright gloves fight intensely on a spotlighted stage."
     outputs = model.infer(text)
-    print(outputs)
+    logger.info(outputs)

lightx2v/models/input_encoders/hf/xlm_roberta/model.py

@@ -10,6 +10,7 @@ import torchvision.transforms as T
 
 from lightx2v.attentions import attention
 from lightx2v.models.input_encoders.hf.t5.tokenizer import HuggingfaceTokenizer
+from loguru import logger
 
 from .xlm_roberta import XLMRoberta
 
@@ -190,7 +191,7 @@ class VisionTransformer(nn.Module):
         norm_eps=1e-5,
     ):
         if image_size % patch_size != 0:
-            print("[WARNING] image_size is not divisible by patch_size", flush=True)
+            logger.info("[WARNING] image_size is not divisible by patch_size", flush=True)
         assert pool_type in ("token", "token_fc", "attn_pool")
         out_dim = out_dim or dim
         super().__init__()

lightx2v/models/networks/wan/model.py

@@ -123,7 +123,9 @@ class WanModel:
             self.scheduler.cnt += 1
             if self.scheduler.cnt >= self.scheduler.num_steps:
                 self.scheduler.cnt = 0
+        self.scheduler.noise_pred = noise_pred_cond
 
+        if self.config["enable_cfg"]:
             embed, grid_sizes, pre_infer_out = self.pre_infer.infer(self.pre_weight, inputs, positive=False)
             x = self.transformer_infer.infer(self.transformer_weights, grid_sizes, embed, *pre_infer_out)
             noise_pred_uncond = self.post_infer.infer(self.post_weight, x, embed, grid_sizes)[0]

lightx2v/models/runners/default_runner.py

@@ -4,6 +4,7 @@ import torch.distributed as dist
 from lightx2v.utils.profiler import ProfilingContext4Debug, ProfilingContext
 from lightx2v.utils.utils import save_videos_grid, cache_video
 from lightx2v.utils.envs import *
+from loguru import logger
 
 
 class DefaultRunner:
@@ -32,7 +33,7 @@ class DefaultRunner:
 
     def run(self):
         for step_index in range(self.model.scheduler.infer_steps):
-            print(f"==> step_index: {step_index + 1} / {self.model.scheduler.infer_steps}")
+            logger.info(f"==> step_index: {step_index + 1} / {self.model.scheduler.infer_steps}")
 
             with ProfilingContext4Debug("step_pre"):
                 self.model.scheduler.step_pre(step_index=step_index)

lightx2v/models/runners/graph_runner.py

 from lightx2v.utils.profiler import ProfilingContext4Debug
+from loguru import logger
 
 
 class GraphRunner:
@@ -7,10 +8,10 @@ class GraphRunner:
         self.compile()
 
     def compile(self):
-        print("start compile...")
+        logger.info("start compile...")
         with ProfilingContext4Debug("compile"):
             self.runner.run_step()
-        print("end compile...")
+        logger.info("end compile...")
 
     def run_pipeline(self):
         return self.runner.run_pipeline()

lightx2v/models/runners/wan/wan_causal_runner.py

@@ -14,6 +14,7 @@ from lightx2v.models.input_encoders.hf.xlm_roberta.model import CLIPModel
 from lightx2v.models.networks.wan.causal_model import WanCausalModel
 from lightx2v.models.networks.wan.lora_adapter import WanLoraWrapper
 from lightx2v.models.video_encoders.hf.wan.vae import WanVAE
+from loguru import logger
 import torch.distributed as dist
 
 
@@ -54,7 +55,7 @@ class WanCausalRunner(WanRunner):
             lora_wrapper = WanLoraWrapper(model)
             lora_name = lora_wrapper.load_lora(self.config.lora_path)
             lora_wrapper.apply_lora(lora_name, self.config.strength_model)
-            print(f"Loaded LoRA: {lora_name}")
+            logger.info(f"Loaded LoRA: {lora_name}")
 
         vae_model = WanVAE(vae_pth=os.path.join(self.config.model_path, "Wan2.1_VAE.pth"), device=init_device, parallel=self.config.parallel_vae)
         if self.config.task == "i2v":
@@ -95,13 +96,13 @@ class WanCausalRunner(WanRunner):
         start_block_idx = 0
 
         for fragment_idx in range(self.num_fragments):
-            print(f"=======> fragment_idx: {fragment_idx + 1} / {self.num_fragments}")
+            logger.info(f"=======> fragment_idx: {fragment_idx + 1} / {self.num_fragments}")
 
             kv_start = 0
             kv_end = kv_start + self.num_frame_per_block * self.frame_seq_length
 
             if fragment_idx > 0:
-                print("recompute the kv_cache ...")
+                logger.info("recompute the kv_cache ...")
                 with ProfilingContext4Debug("step_pre"):
                     self.model.scheduler.latents = self.model.scheduler.last_sample
                     self.model.scheduler.step_pre(step_index=self.model.scheduler.infer_steps - 1)
@@ -115,12 +116,12 @@ class WanCausalRunner(WanRunner):
             infer_blocks = self.infer_blocks - (fragment_idx > 0)
 
             for block_idx in range(infer_blocks):
-                print(f"=======> block_idx: {block_idx + 1} / {infer_blocks}")
-                print(f"=======> kv_start: {kv_start}, kv_end: {kv_end}")
+                logger.info(f"=======> block_idx: {block_idx + 1} / {infer_blocks}")
+                logger.info(f"=======> kv_start: {kv_start}, kv_end: {kv_end}")
                 self.model.scheduler.reset()
 
                 for step_index in range(self.model.scheduler.infer_steps):
-                    print(f"==> step_index: {step_index + 1} / {self.model.scheduler.infer_steps}")
+                    logger.info(f"==> step_index: {step_index + 1} / {self.model.scheduler.infer_steps}")
 
                     with ProfilingContext4Debug("step_pre"):
                         self.model.scheduler.step_pre(step_index=step_index)

lightx2v/models/runners/wan/wan_runner.py

@@ -14,6 +14,7 @@ from lightx2v.models.networks.wan.model import WanModel
 from lightx2v.models.networks.wan.lora_adapter import WanLoraWrapper
 from lightx2v.models.video_encoders.hf.wan.vae import WanVAE
 import torch.distributed as dist
+from loguru import logger
 
 
 @RUNNER_REGISTER("wan2.1")
@@ -47,7 +48,7 @@ class WanRunner(DefaultRunner):
             lora_wrapper = WanLoraWrapper(model)
             lora_name = lora_wrapper.load_lora(self.config.lora_path)
             lora_wrapper.apply_lora(lora_name, self.config.strength_model)
-            print(f"Loaded LoRA: {lora_name}")
+            logger.info(f"Loaded LoRA: {lora_name}")
 
         vae_model = WanVAE(vae_pth=os.path.join(self.config.model_path, "Wan2.1_VAE.pth"), device=init_device, parallel=self.config.parallel_vae)
         if self.config.task == "i2v":

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

@@ -7,6 +7,7 @@ import torch.nn as nn
 import torch.nn.functional as F
 import torch.distributed as dist
 from einops import rearrange
+from loguru import logger
 
 __all__ = [
     "WanVAE",
@@ -801,7 +802,7 @@ class WanVAE:
                 split_dim = 2
                 images = self.decode_dist(zs, world_size, cur_rank, split_dim)
             else:
-                print("Fall back to naive decode mode")
+                logger.info("Fall back to naive decode mode")
                 images = self.model.decode(zs.unsqueeze(0), self.scale).float().clamp_(-1, 1)
         else:
             images = self.model.decode(zs.unsqueeze(0), self.scale).float().clamp_(-1, 1)

lightx2v/utils/profiler.py

@@ -2,6 +2,7 @@ import time
 import torch
 from contextlib import ContextDecorator
 from lightx2v.utils.envs import *
+from loguru import logger
 
 
 class _ProfilingContext(ContextDecorator):
@@ -16,7 +17,7 @@ class _ProfilingContext(ContextDecorator):
     def __exit__(self, exc_type, exc_val, exc_tb):
         torch.cuda.synchronize()
         elapsed = time.perf_counter() - self.start_time
-        print(f"[Profile] {self.name} cost {elapsed:.6f} seconds")
+        logger.info(f"[Profile] {self.name} cost {elapsed:.6f} seconds")
         return False