training script

animatediff/data/dataset.py

@@ -0,0 +1,98 @@
+import os, io, csv, math, random
+import numpy as np
+from einops import rearrange
+from decord import VideoReader
+
+import torch
+import torchvision.transforms as transforms
+from torch.utils.data.dataset import Dataset
+from animatediff.utils.util import zero_rank_print
+
+
+
+class WebVid10M(Dataset):
+    def __init__(
+            self,
+            csv_path, video_folder,
+            sample_size=256, sample_stride=4, sample_n_frames=16,
+            is_image=False,
+        ):
+        zero_rank_print(f"loading annotations from {csv_path} ...")
+        with open(csv_path, 'r') as csvfile:
+            self.dataset = list(csv.DictReader(csvfile))
+        self.length = len(self.dataset)
+        zero_rank_print(f"data scale: {self.length}")
+
+        self.video_folder    = video_folder
+        self.sample_stride   = sample_stride
+        self.sample_n_frames = sample_n_frames
+        self.is_image        = is_image
+        
+        sample_size = tuple(sample_size) if not isinstance(sample_size, int) else (sample_size, sample_size)
+        self.pixel_transforms = transforms.Compose([
+            transforms.RandomHorizontalFlip(),
+            transforms.Resize(sample_size[0]),
+            transforms.CenterCrop(sample_size),
+            transforms.Normalize(mean=[0.5, 0.5, 0.5], std=[0.5, 0.5, 0.5], inplace=True),
+        ])
+    
+    def get_batch(self, idx):
+        video_dict = self.dataset[idx]
+        videoid, name, page_dir = video_dict['videoid'], video_dict['name'], video_dict['page_dir']
+        
+        video_dir    = os.path.join(self.video_folder, f"{videoid}.mp4")
+        video_reader = VideoReader(video_dir)
+        video_length = len(video_reader)
+        
+        if not self.is_image:
+            clip_length = min(video_length, (self.sample_n_frames - 1) * self.sample_stride + 1)
+            start_idx   = random.randint(0, video_length - clip_length)
+            batch_index = np.linspace(start_idx, start_idx + clip_length - 1, self.sample_n_frames, dtype=int)
+        else:
+            batch_index = [random.randint(0, video_length - 1)]
+
+        pixel_values = torch.from_numpy(video_reader.get_batch(batch_index).asnumpy()).permute(0, 3, 1, 2).contiguous()
+        pixel_values = pixel_values / 255.
+        del video_reader
+
+        if self.is_image:
+            pixel_values = pixel_values[0]
+        
+        return pixel_values, name
+
+    def __len__(self):
+        return self.length
+
+    def __getitem__(self, idx):
+        while True:
+            try:
+                pixel_values, name = self.get_batch(idx)
+                break
+
+            except Exception as e:
+                idx = random.randint(0, self.length-1)
+
+        pixel_values = self.pixel_transforms(pixel_values)
+        sample = dict(pixel_values=pixel_values, text=name)
+        return sample
+
+
+
+if __name__ == "__main__":
+    from animatediff.utils.util import save_videos_grid
+
+    dataset = WebVid10M(
+        csv_path="/mnt/petrelfs/guoyuwei/projects/datasets/webvid/results_2M_val.csv",
+        video_folder="/mnt/petrelfs/guoyuwei/projects/datasets/webvid/2M_val",
+        sample_size=256,
+        sample_stride=4, sample_n_frames=16,
+        is_image=True,
+    )
+    import pdb
+    pdb.set_trace()
+    
+    dataloader = torch.utils.data.DataLoader(dataset, batch_size=4, num_workers=16,)
+    for idx, batch in enumerate(dataloader):
+        print(batch["pixel_values"].shape, len(batch["text"]))
+        # for i in range(batch["pixel_values"].shape[0]):
+        #     save_videos_grid(batch["pixel_values"][i:i+1].permute(0,2,1,3,4), os.path.join(".", f"{idx}-{i}.mp4"), rescale=True)