broken PNG file

[Fululu627]

Thank you for your excellent work. I encountered the following problems during training. I checked the PNG image and it was normal, but I reported the following error "broken PNG file" during training. Look forward to your reply

Traceback (most recent call last):
File "main.py", line 474, in
main()
File "main.py", line 447, in main
iterate("train", args, train_loader, model, optimizer, logger, epoch) # train for one epoch
File "main.py", line 191, in iterate
for i, batch_data in enumerate(loader):
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/dataloader.py", line 663, in next
data = self._next_data()
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/dataloader.py", line 1356, in _next_data
return self._process_data(data)
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/dataloader.py", line 1382, in _process_data
data.reraise()
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/_utils.py", line 475, in reraise
raise exception
SyntaxError: Caught SyntaxError in DataLoader worker process 0.
Original Traceback (most recent call last):
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/_utils/worker.py", line 302, in _worker_loop
data = fetcher.fetch(index)
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/_utils/fetch.py", line 49, in fetch
data = [self.dataset[idx] for idx in possibly_batched_index]
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/_utils/fetch.py", line 49, in
data = [self.dataset[idx] for idx in possibly_batched_index]
File "/home/hwp/PENet/dataloaders/kitti_loader.py", line 359, in getitem
rgb, sparse, target = self.getraw(index)
File "/home/hwp/PENet/dataloaders/kitti_loader.py", line 351, in getraw
(self.paths['rgb'][index] is not None and (self.args.use_rgb or self.args.use_g)) else None
File "/home/hwp/PENet/dataloaders/kitti_loader.py", line 158, in rgb_read
rgb_png = np.array(img_file, dtype='uint8') # in the range [0,255]
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/PIL/Image.py", line 675, in array
new["data"] = self.tobytes()
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/PIL/Image.py", line 718, in tobytes
self.load()
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/PIL/ImageFile.py", line 235, in load
s = read(self.decodermaxblock)
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/PIL/PngImagePlugin.py", line 896, in load_read
cid, pos, length = self.png.read()
File "/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/PIL/PngImagePlugin.py", line 166, in read
raise SyntaxError(f"broken PNG file (chunk {repr(cid)})")
File "", line None
SyntaxError: broken PNG file (chunk b'\x00\x00\x00\x00')

[JUGGHM]

Thanks for your interest! But we have never encountered such problems. Maybe you could check the completeness your dataset and environments.

[yhwyaaa]

感谢您的出色工作。我在训练过程中遇到了以下问题。我检查了 PNG 图像，它是正常的，但我在训练期间报告了以下错误 “broken PNG file”。期待您的回复

回溯（最近一次调用最后）：文件 “main.py”，第 474 行，在 main（） 文件中 文件“main.py”，第 447 行，在 main iterate（“train”， args， train_loader， model， optimizer， logger， epoch） # 训练一个 epoch 文件 “main.py”，第 191 行，迭代 i 中，batch_data 在 enumerate（loader） 中）：文件 “/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/dataloader.py”， 第 663 行，下一个 data = self._next_data（） 文件“/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/dataloader.py”，第 1356 行，_next_data返回 self._process_data（data） 文件“/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/dataloader.py”，第 1382 行，_process_data data.reraise（） 中文件“/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/_utils.py”，第 475 行，在 reraise 中引发异常 SyntaxError：在 DataLoader 工作进程 0 中捕获 SyntaxError。原始回溯（最近调用最后一次）：文件“/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/_utils/worker.py”，第 302 行，_worker_loop data = fetcher.fetch（index）文件“/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/_utils/fetch.py”，第 49 行，在 fetch data = [self.dataset[idx] for idx in possibly_batched_index] 中]文件“/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/torch/utils/data/_utils/fetch.py”，第 49 行，在 data = [self.dataset[idx] 中，对于 possibly_batched_index 中的 idx]文件“/home/hwp/PENet/dataloaders/kitti_loader.py”，第 359 行，在 getitem rgb 中，稀疏，目标 = self。getraw（index） 文件 “/home/hwp/PENet/dataloaders/kitti_loader.py”，第 351 行，在 getraw 中 （self.paths['rgb'][index] 不是 None 和 （self.args.use_rgb or self.args.use_g）） else None 文件 “/home/hwp/PENet/dataloaders/kitti_loader.py”，第 158 行，rgb_read rgb_png = np.array（img_file， dtype='uint8'） # 在 [0,255] 范围内文件 “/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/PIL/Image.py”，第 675 行**，数组** new[“data”] = self.tobytes（） 文件 “/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/PIL/Image.py”，第 718 行，以 TB 为单位 self.load（） 文件 “/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/PIL/ImageFile.py”，第 235 行，加载 s = read（self.decodermaxblock）文件 “/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/PIL/PngImagePlugin.py”，第 896 行，load_read cid， pos，长度 = self.png.read（） 文件 “/home/hwp/anaconda3/envs/pytorch/lib/python3.7/site-packages/PIL/PngImagePlugin.py”，第 166 行，读取中 raise SyntaxError（f“损坏的 PNG 文件（块 {repr（cid）}）”）文件“”，无行 SyntaxError：损坏的 PNG 文件（块 b'\x00\x00\x00\x00\x00'）

感谢您的出色工作。您好，请问您这个问题是怎么解决的，能告知一下嘛，我修改了batchsize，修改为1时训练了5轮之后也是这个样子，修改为4时训练一轮都完成不了。期待您的回复。