Add frame extraction script

extract_frames.py

@@ -0,0 +1,73 @@
+import cv2
+import os
+from pathlib import Path
+from rich.progress import (
+    Progress,
+    SpinnerColumn,
+    TextColumn,
+    BarColumn,
+    TaskProgressColumn,
+    MofNCompleteColumn,
+)
+
+BASE_DIR = Path("./data")
+OUTPUT_DIR = Path("./frames")
+
+affected_dir = BASE_DIR / "affected"
+unaffected_dir = BASE_DIR / "unaffected"
+
+dataset = {
+    "affected": list(affected_dir.glob("*.mp4")),
+    "unaffected": list(unaffected_dir.glob("*.mp4")),
+}
+
+os.makedirs(OUTPUT_DIR, exist_ok=True)
+
+# Define the frame skip, use 1 to extract all frames
+FRAME_SKIP = 10
+
+total_frames_to_save = 0
+for label, videos in dataset.items():
+    for video in videos:
+        cap = cv2.VideoCapture(str(video))
+        frames = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
+        total_frames_to_save += (frames - 1) // FRAME_SKIP + 1
+        cap.release()
+
+with Progress(
+    SpinnerColumn(),
+    TextColumn("[progress.description]{task.description}"),
+    BarColumn(),
+    TaskProgressColumn(),
+    MofNCompleteColumn(),
+) as progress:
+    task = progress.add_task("[cyan]Extracting frames...", total=total_frames_to_save)
+
+    for label, videos in dataset.items():
+        for video in videos:
+            cap = cv2.VideoCapture(str(video))
+            video_dir = OUTPUT_DIR / label / video.stem
+
+            os.makedirs(video_dir, exist_ok=True)
+
+            frameCount = 0
+            savedFrameCount = 0
+
+            while True:
+                ret, frame = cap.read()
+                if not ret:
+                    break
+
+                if frameCount % FRAME_SKIP == 0:
+                    cv2.imwrite(f"{video_dir}/{frameCount:06d}.jpg", frame)
+                    savedFrameCount += 1
+                    progress.update(task, advance=1)
+
+                frameCount += 1
+
+            cap.release()
+
+            # Print the number of frames extracted
+            print(
+                f"Extracted {savedFrameCount} frames from {video} (Total: {frameCount})"
+            )

requirements.txt

@@ -0,0 +1,2 @@
+opencv-python==4
+rich==13