CVML-TueAI/Breakfast-Actions

🍳 Breakfast Actions Dataset (HF + WebDataset Ready)

This repository hosts the Breakfast Actions dataset metadata and videos, organized for modern deep learning workflows.
It provides:

• 4 evaluation splits (s1, s2, s3, s4)
• JSONL metadata describing each video, participant, camera, and frame-level action segments
• Raw AVI videos stored directly on HuggingFace
• Optional WebDataset shards for streaming training

---

📁 Folder Layout

Breakfast-Actions/
│
├── Converted_Data/
│     ├── metadata_s1.jsonl
│     ├── metadata_s2.jsonl
│     ├── metadata_s3.jsonl
│     └── metadata_s4.jsonl
│
├── Videos/
│     ├── P03/cam01/*.avi
│     ├── P03/cam02/*.avi
│     ├── P04/cam01/*.avi
│     └── ... (participants P03–P54, multiple cameras)
│
└── WebDataset_Shards/   (optional)
       ├── 000000.tar
       ├── 000001.tar
       └── ...

---

📝 JSONL Record Format

Each metadata line looks like:

{
  "video_path": "Videos/P03/cam01/P03_coffee.avi",
  "participant": "P03",
  "camera": "cam01",
  "video": "P03_coffee",
  "labels": [
      {"start": 1, "end": 385, "label": "SIL"},
      {"start": 385, "end": 599, "label": "pour_oil"},
      ...
  ]
}

All video paths match the directory structure inside the HF repo.

---

🔹 Load Metadata Using HuggingFace Datasets

from datasets import load_dataset

ds = load_dataset("json", data_files="metadata_s2.jsonl")["train"]

# Select all videos belonging to split s2
subset = ds

---

🔹 Load and Decode a Video

Using Decord

from decord import VideoReader
item = ds[0]

vr = VideoReader(item["video_path"])
frame0 = vr[0]   # first frame

Using TorchVision

from torchvision.io import read_video
video, audio, info = read_video(item["video_path"])

---

🔹 WebDataset Version (Optional)

If the dataset includes .tar shards:

import webdataset as wds, jsonlines

ids = [rec["video_path"] for rec in jsonlines.open("metadata_s2.jsonl")]
dset = wds.WebDataset("WebDataset_Shards/*.tar").select(lambda s: s["json"]["video_path"] in ids)

Each shard contains:

• xxx.avi → video bytes
• xxx.json → metadata JSON

---

🔹 PyTorch Example

from torch.utils.data import Dataset, DataLoader
from decord import VideoReader

class BreakfastDataset(Dataset):
    def __init__(self, subset): self.subset = subset
    def __len__(self): return len(self.subset)
    def __getitem__(self, idx):
        item = self.subset[idx]
        vr = VideoReader(item["video_path"])
        frames = vr.get_batch([0, 8, 16])
        return frames, item["labels"]

loader = DataLoader(BreakfastDataset(ds), batch_size=4)

---

🔢 Splits Description

The dataset is partitioned by participant ID:

Split	Participants
s1	P03–P15
s2	P16–P28
s3	P29–P41
s4	P42–P54

Each split has its own metadata JSONL file.

---

📚 Citation

If you use the Breakfast Actions dataset, please cite:

@inproceedings{kuehne2014language,
  title={The language of actions: Recovering the syntax and semantics of goal-directed human activities},
  author={Kuehne, Hildegard and Arslan, Ali and Serre, Thomas},
  booktitle={Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition},
  pages={780--787},
  year={2014}
}

---