features = extract_features(model, frames_tensor) print(features.shape) You might want to save these features for later use:
video_path = '22241.mp4' frames_tensor = load_video(video_path) def extract_features(model, video_tensor): # This may need to be adjusted based on the model and the input requirements inputs = video_tensor.unsqueeze(0) # Add batch dimension with torch.no_grad(): features = model(inputs) return features.squeeze()
def prepare_model(): model = models.video.slowfast_r50_2x16x32_featurizer(pretrained=True) model.eval() # Set the model to evaluation mode return model 22241mp4
For simplicity and effectiveness, let's outline a method using PyTorch and a pre-trained model. We'll use a model pre-trained on the Kinetics dataset, which is a common benchmark for video action recognition tasks. Specifically, we can leverage the SlowFast model, which has shown excellent performance on various video understanding tasks. Ensure you have PyTorch and torchvision installed. If not, you can install them via pip:
pip install torch torchvision We'll use the SlowFast model pre-trained on Kinetics-400. This example assumes you're familiar with PyTorch basics. Ensure you have PyTorch and torchvision installed
model = prepare_model() To extract features, we first need to preprocess the video. This involves loading the video, possibly resizing it, and converting it into a tensor that the model can process.
To prepare a deep feature for a video file like "22241.mp4", we need to extract meaningful and high-level representations from the video that can be used for tasks such as video classification, retrieval, or clustering. One common approach to achieve this is by using a pre-trained deep learning model, particularly those designed for video analysis like 3D convolutional neural networks (CNNs) or models that can handle sequential data like recurrent neural networks (RNNs) or Transformers. model = prepare_model() To extract features, we first
import torch import torchvision import torchvision.transforms as transforms from torchvision import models