---
task_categories:
- translation
language:
- en
---
# Structure
Each sample will have a structure as follows:
```
{
  "id": <id-of-sample>,
  "type" <rgb-or-keypoints-data>,
  "view": <frontal-or-side-view>,
  "text": <translation-of-sample-in-spoken-language>,
  "video": <video-in-bytes>,
}
```

# How To Use
Because the returned video will be in bytes, here is a way to extract frames and fps:
```python
# pip install av

import av
import io
import numpy as np
import os
from datasets import load_dataset


def extract_frames(video_bytes):
    # Create a memory-mapped file from the bytes
    container = av.open(io.BytesIO(video_bytes))

    # Find the video stream
    visual_stream = next(iter(container.streams.video), None)

    # Extract video properties
    video_fps = visual_stream.average_rate

    # Initialize arrays to store frames and audio
    frames_array = []

    # Extract frames
    for packet in container.demux([visual_stream]):
        for frame in packet.decode():
            img_array = np.array(frame.to_image())
            frames_array.append(img_array)

    return frames_array, video_fps


dataset = load_dataset("VieSignLang/how2sign-clips", split="test", streaming=True)
sample = next(iter(dataset))["video"]
frames, video_fps = extract_frames(sample)
print(f"Number of frames: {frames.shape[0]}")
print(f"Video FPS: {video_fps}")
```