visual_features = [] for frame in frames: frame = transform(frame) frame = frame.unsqueeze(0).to(device) feature = model(frame) feature = feature.squeeze(0).detach().cpu().numpy() visual_features.append(feature) return visual_features
# Simple Feature Extraction def extract_simple_features(video_path): cap = cv2.VideoCapture(video_path) duration = cap.get(cv2.CAP_PROP_POS_MSEC) / 1000 width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)) height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT)) fps = cap.get(cv2.CAP_PROP_FPS) cap.release() features = { "file_name": video_path, "duration": duration, "resolution": (width, height), "fps": fps } return features
To prepare a feature for a video file named "vid_1158.mp4", we'll need to consider what kind of features are typically extracted or used in the context of video analysis or processing. Features in video analysis can range from simple metadata to complex descriptors of the video content. vid_1158.mp4
# More complex visual feature extraction def extract_visual_features(frames): model = models.resnet50(pretrained=True) model.fc = torch.nn.Identity() # Remove the final classification layer device = torch.device('cuda' if torch.cuda.is_available() else 'cpu') model.to(device) model.eval()
transform = transforms.Compose([ transforms.ToTensor(), transforms.Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]) ]) visual_features = [] for frame in frames: frame
video_path = "vid_1158.mp4" simple_features = extract_simple_features(video_path) frames = load_video(video_path) visual_features = extract_visual_features(frames)
print("Simple Features:", simple_features) print("Visual Features Shape:", len(visual_features), len(visual_features[0])) This example extracts basic metadata and uses a pre-trained ResNet50 model to extract features from each frame. Note that the complexity and specifics can vary greatly depending on your exact requirements and the type of analysis you plan to perform. Note that the complexity and specifics can vary
# Load the video def load_video(video_path): cap = cv2.VideoCapture(video_path) frames = [] while cap.isOpened(): ret, frame = cap.read() if not ret: break # Convert to RGB frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB) frames.append(frame) cap.release() return frames