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import os
import torch
import lightning as pl
from PIL import Image
from diffsynth import WanVideoReCamMasterPipeline, ModelManager
import json
import imageio
from torchvision.transforms import v2
from einops import rearrange
import argparse
import numpy as np
import pdb
from tqdm import tqdm
os.environ["TOKENIZERS_PARALLELISM"] = "false"
class VideoEncoder(pl.LightningModule):
def __init__(self, text_encoder_path, vae_path, tiled=True, tile_size=(34, 34), tile_stride=(18, 16)):
super().__init__()
model_manager = ModelManager(torch_dtype=torch.bfloat16, device="cpu")
model_manager.load_models([text_encoder_path, vae_path])
self.pipe = WanVideoReCamMasterPipeline.from_model_manager(model_manager)
self.tiler_kwargs = {"tiled": tiled, "tile_size": tile_size, "tile_stride": tile_stride}
self.frame_process = v2.Compose([
# v2.CenterCrop(size=(900, 1600)),
# v2.Resize(size=(900, 1600), antialias=True),
v2.ToTensor(),
v2.Normalize(mean=[0.5, 0.5, 0.5], std=[0.5, 0.5, 0.5]),
])
def crop_and_resize(self, image):
width, height = image.size
# print(width,height)
width_ori, height_ori_ = 832 , 480
image = v2.functional.resize(
image,
(round(height_ori_), round(width_ori)),
interpolation=v2.InterpolationMode.BILINEAR
)
return image
def load_video_frames(self, video_path):
"""加载完整视频"""
reader = imageio.get_reader(video_path)
frames = []
for frame_data in reader:
frame = Image.fromarray(frame_data)
frame = self.crop_and_resize(frame)
frame = self.frame_process(frame)
frames.append(frame)
reader.close()
if len(frames) == 0:
return None
frames = torch.stack(frames, dim=0)
frames = rearrange(frames, "T C H W -> C T H W")
return frames
def encode_scenes(scenes_path, text_encoder_path, vae_path,output_dir):
"""编码所有场景的视频"""
encoder = VideoEncoder(text_encoder_path, vae_path)
encoder = encoder.cuda()
encoder.pipe.device = "cuda"
processed_count = 0
prompt_emb = 0
os.makedirs(output_dir,exist_ok=True)
for i, scene_name in tqdm(enumerate(os.listdir(scenes_path)),total=len(os.listdir(scenes_path))):
# if i < 1700:
# continue
scene_dir = os.path.join(scenes_path, scene_name)
save_dir = os.path.join(output_dir,scene_name.split('.')[0])
# print('in:',scene_dir)
# print('out:',save_dir)
if not scene_dir.endswith(".mp4"):# or os.path.isdir(output_dir):
continue
os.makedirs(save_dir,exist_ok=True)
# 检查是否已编码
encoded_path = os.path.join(save_dir, "encoded_video.pth")
if os.path.exists(encoded_path):
print(f"Scene {scene_name} already encoded, skipping...")
continue
# 加载场景信息
scene_cam_path = scene_dir.replace(".mp4", ".npz")
if not os.path.exists(scene_cam_path):
continue
with np.load(scene_cam_path) as data:
cam_data = data.files
cam_emb = {k: data[k].cpu() if isinstance(data[k], torch.Tensor) else data[k] for k in cam_data}
# with open(scene_cam_path, 'rb') as f:
# cam_data = np.load(f) # 此时cam_data仅包含数据，无文件句柄引用
# 加载视频
video_path = scene_dir
if not os.path.exists(video_path):
print(f"Video not found: {video_path}")
continue
# try:
print(f"Encoding scene {scene_name}...")
# 加载和编码视频
video_frames = encoder.load_video_frames(video_path)
if video_frames is None:
print(f"Failed to load video: {video_path}")
continue
video_frames = video_frames.unsqueeze(0).to("cuda", dtype=torch.bfloat16)
print('video shape:',video_frames.shape)
# 编码视频
with torch.no_grad():
latents = encoder.pipe.encode_video(video_frames, **encoder.tiler_kwargs)[0]
# 编码文本
if processed_count == 0:
print('encode prompt!!!')
prompt_emb = encoder.pipe.encode_prompt("A video of a scene shot using a pedestrian's front camera while walking")
del encoder.pipe.prompter
# pdb.set_trace()
# 保存编码结果
encoded_data = {
"latents": latents.cpu(),
#"prompt_emb": {k: v.cpu() if isinstance(v, torch.Tensor) else v for k, v in prompt_emb.items()},
"cam_emb": cam_emb
}
# pdb.set_trace()
torch.save(encoded_data, encoded_path)
print(f"Saved encoded data: {encoded_path}")
processed_count += 1
# except Exception as e:
# print(f"Error encoding scene {scene_name}: {e}")
# continue
print(f"Encoding completed! Processed {processed_count} scenes.")
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("--scenes_path", type=str, default="/share_zhuyixuan05/public_datasets/sekai/Sekai-Project/sekai-game-walking")
parser.add_argument("--text_encoder_path", type=str,
default="models/Wan-AI/Wan2.1-T2V-1.3B/models_t5_umt5-xxl-enc-bf16.pth")
parser.add_argument("--vae_path", type=str,
default="models/Wan-AI/Wan2.1-T2V-1.3B/Wan2.1_VAE.pth")
parser.add_argument("--output_dir",type=str,
default="/share_zhuyixuan05/zhuyixuan05/sekai-game-walking")
args = parser.parse_args()
encode_scenes(args.scenes_path, args.text_encoder_path, args.vae_path,args.output_dir)
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