Update README.md

README.md

@@ -48,6 +48,131 @@ snapshot_download(repo_id, repo_type=repo_type, local_dir=local_dir)
 ```
 
 ```python
+import cv2
+import os
+from tqdm import tqdm
+
+#===============================================================================================
+
+def scan_videos(directory, videos_extensions=['.mkv', '.mp4', '.avi']):
+    
+    video_files = [os.path.join(directory, f) for f in os.listdir(directory) if os.path.splitext(f)[1].lower() in videos_extensions]
+    
+    return video_files
+
+def extract_frames(video_path, 
+                   output_folder, 
+                   interval=0.1, 
+                   square_size=480, 
+                   scale_size=128, 
+                   images_ext='.jpg'
+                  ):
+    
+    if not os.path.exists(output_folder):
+        os.makedirs(output_folder)
+    
+    cap = cv2.VideoCapture(video_path)
+    fps = cap.get(cv2.CAP_PROP_FPS)
+    frame_interval = int(fps * interval)
+    frame_count = 0
+    total_frames = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
+
+    print('Video file:', os.path.basename(video_path))
+    
+    with tqdm(total=total_frames, desc='Extracting frames') as pbar:
+        
+        while True:
+            
+            ret, frame = cap.read()
+            
+            if not ret:
+                break
+                
+            if frame_count % frame_interval == 0:
+                
+                # Calculate the coordinates for cropping the center square
+                height, width = frame.shape[:2]
+                center_y, center_x = height // 2, width // 2
+                half_size = square_size // 2
+                top_left_x = max(center_x - half_size, 0)
+                top_left_y = max(center_y - half_size, 0)
+                bottom_right_x = min(center_x + half_size, width)
+                bottom_right_y = min(center_y + half_size, height)
+                
+                square_frame = frame[top_left_y:bottom_right_y, top_left_x:bottom_right_x]
+                
+                # Normalize brightness and contrast
+                normalized_frame = cv2.normalize(square_frame, None, alpha=0, beta=255, norm_type=cv2.NORM_MINMAX)
+
+                # Resize
+                resized_frame = cv2.resize(normalized_frame, (scale_size, scale_size))
+                
+                frame_name = os.path.join(output_folder, f"frame_{frame_count}{images_ext}")
+                cv2.imwrite(frame_name, resized_frame)
+                
+            frame_count += 1
+            
+            pbar.update(1)
+    
+    cap.release()
+    
+    print(f"Frames extracted to {output_folder}")
+
+#===============================================================================================
+
+videos_dir = 'Videos'
+videos_extensions = ['.mkv', '.mp4', '.avi']
+
+frames_output_dir = 'Output'
+frames_extraction_interval = 0.1 # FPS * frames_extraction_interval
+original_frame_size = 480
+final_frame_size = 128
+output_frames_extension = '.jpg'
+
+#===============================================================================================
+
+print('=' * 70)
+print('Scanning videos dir...')
+video_files = scan_videos(videos_dir)
+print('Done!')
+
+print('=' * 70)
+print('Found', len(video_files), 'video files')
+print('=' * 70)
+
+print('Starting extraction...')
+print('=' * 70)
+
+for video in video_files:
+        
+    extract_frames(video, 
+                   os.path.join(frames_output_dir, os.path.splitext(os.path.basename(video))[0]),
+                   frames_extraction_interval,
+                   original_frame_size,
+                   final_frame_size,
+                   output_frames_extension
+                  )
+
+    print('=' * 70)
+
+print('Extraction finished!')
+print('=' * 70)
+
+print('Scanning for extracted frames...')
+
+frames_list = list()
+
+for (dirpath, dirnames, filenames) in os.walk(frames_output_dir):
+    frames_list += [os.path.join(dirpath, file) for file in filenames if file.endswith(output_frames_extension)]
+                    
+print('Done!')
+print('=' * 70)
+
+print('Found', len(frames_list), 'video frames')
+print('=' * 70)
+
+print('Done!')
+print('=' * 70)
 ```
 
 ***