take every second frame

app.py

@@ -78,10 +78,12 @@ def process_video(
     remove_files_older_than(RESULTS, 30)
 
     video_info = sv.VideoInfo.from_video_path(input_video)
+    video_info.fps = video_info.fps // 2
     total = calculate_end_frame_index(input_video)
     frame_generator = sv.get_video_frames_generator(
         source_path=input_video,
-        end=total
+        end=total,
+        stride=2
     )
     result_file_name = generate_file_name(extension="mp4")
     result_file_path = os.path.join(RESULTS, result_file_name)