detect and quarantine corrupt pngs

.gitignore

@@ -1,3 +1,4 @@
 input/
 output/
+corrupted/
 

.specstory/history/2025-12-11_18-21Z-compress-png-sequences-with-multithreading.md

@@ -3012,3 +3012,761 @@ The Threadripper’s higher core count should provide a clear speedup for this C
 
 ---
 
+_**User (2025-12-11 21:39Z)**_
+
+How about a threadripper 1950X?
+
+---
+
+_**Agent (model default, mode Agent)**_
+
+
+
+---
+
+
+The Threadripper 1950X will likely be slower than the i9-13900KF, despite having more threads.
+
+**Threadripper 1950X:**
+- 16 physical cores, 32 threads
+- First-gen Threadripper (Zen, 2017)
+- The script would use 32 worker processes
+- Older architecture, lower IPC
+
+**i9-13900KF:**
+- 8 P-cores + 8 E-cores = 16 physical cores, 24 threads
+- Raptor Lake (2022)
+- The script would use 24 worker processes
+- Much higher single-threaded performance
+
+**Why the i9-13900KF will likely be faster:**
+1. Per-core performance: The i9’s P-cores are significantly faster (roughly 50–70% higher IPC).
+2. Core efficiency: 24 faster workers can outperform 32 slower ones for this workload.
+3. Memory: The i9’s newer memory controller can help.
+4. Architecture: 5+ years of improvements in efficiency and performance.
+
+**Expected performance:**
+- The i9-13900KF should be roughly 20–40% faster, depending on I/O and the specific compression work.
+
+**Bottom line:** The 1950X’s extra threads don’t make up for the i9’s much faster cores. The 3970X’s large core count can overcome the per-core gap; the 1950X cannot.
+
+---
+
+_**User (2025-12-11 21:39Z)**_
+
+Sometimes, PNGs corrupt; we'll get bad results where everything is black, the image cuts off too early, or the file is just 0kb (placeholder). Can we have it report bad PNGs?
+
+---
+
+_**Agent (model default, mode Agent)**_
+
+
+
+---
+
+
+Adding validation to detect and report corrupted PNGs:
+
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+
+
+
+---
+
+<tool-use data-tool-type="write" data-tool-name="search_replace">
+
+<details><summary>Tool use: **search_replace** • Edit file: compress_pngs.py</summary>
+
+**Chunk 1**
+Lines added: 43, lines removed: 1
+
+```diff
+@@ -38,5 +38,47 @@
+          
+          original_size = os.path.getsize(input_path)
+-         img = Image.open(input_path)
++         
++         # Check for corrupted/empty files
++         if original_size == 0:
++             return (str(input_path), False, "CORRUPTED: File is 0 bytes (empty/placeholder)", 0, 0, 0, False, True)
++         
++         # Try to open and validate the image
++         try:
++             img = Image.open(input_path)
++             # Force load to detect corruption early
++             img.load()
++         except Exception as e:
++             return (str(input_path), False, f"CORRUPTED: Cannot open/load image - {str(e)}", original_size, 0, 0, False, True)
++         
++         # Validate image dimensions
++         if img.width == 0 or img.height == 0:
++             return (str(input_path), False, f"CORRUPTED: Invalid dimensions ({img.width}x{img.height})", original_size, 0, 0, False, True)
++         
++         # Check if image appears completely black (potential corruption indicator)
++         # But be careful - some images might legitimately be black
++         # We'll only flag this if the file is suspiciously small for its dimensions
++         try:
++             # Sample a few pixels to check if all are black
++             sample_size = min(100, img.width * img.height)
++             pixels = list(img.getdata()[:sample_size])
++             if pixels:
++                 # Check if all sampled pixels are black (0 or (0,0,0) or (0,0,0,0))
++                 all_black = True
++                 for pixel in pixels:
++                     if isinstance(pixel, (tuple, list)):
++                         if any(p &gt; 0 for p in pixel):
++                             all_black = False
++                             break
++                     else:
++                         if pixel &gt; 0:
++                             all_black = False
++                             break
++                 
++                 # If all black AND file is suspiciously small, flag as potentially corrupted
++                 if all_black and original_size &lt; (img.width * img.height * 0.1):  # Less than 0.1 bytes per pixel
++                     return (str(input_path), False, f"CORRUPTED: Image appears all black with suspiciously small file size", original_size, 0, 0, False, True)
++         except:
++             # If we can't check pixels, continue anyway
++             pass
+          
+          # Determine target bit depth
+```
+
+</details>
+
+</tool-use>
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+
+
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+
+
+
+---
+
+<tool-use data-tool-type="write" data-tool-name="search_replace">
+
+<details><summary>Tool use: **search_replace** • Edit file: compress_pngs.py</summary>
+
+**Chunk 1**
+Lines added: 1, lines removed: 1
+
+```diff
+@@ -32,5 +32,5 @@
+              savings = original_size - new_size
+              savings_pct = (savings / original_size * 100) if original_size &gt; 0 else 0
+-             return (str(input_path), True, None, original_size, new_size, savings_pct, True)
++             return (str(input_path), True, None, original_size, new_size, savings_pct, True, False)
+          
+          # Ensure output directory exists
+```
+
+</details>
+
+</tool-use>
+
+---
+
+<tool-use data-tool-type="write" data-tool-name="search_replace">
+
+<details><summary>Tool use: **search_replace** • Edit file: compress_pngs.py</summary>
+
+**Chunk 1**
+Lines added: 4, lines removed: 2
+
+```diff
+@@ -174,7 +174,9 @@
+          savings = original_size - new_size
+          savings_pct = (savings / original_size * 100) if original_size &gt; 0 else 0
+-         return (str(input_path), True, None, original_size, new_size, savings_pct, False)
++         return (str(input_path), True, None, original_size, new_size, savings_pct, False, False)
+      except Exception as e:
+-         return (str(input_path), False, str(e), 0, 0, 0, False)
++         # Check if error might indicate corruption
++         is_corrupted = "truncated" in str(e).lower() or "cannot identify" in str(e).lower() or "corrupt" in str(e).lower()
++         return (str(input_path), False, str(e), 0, 0, 0, False, is_corrupted)
+  
+  def find_image_files(input_dir):
+```
+
+</details>
+
+</tool-use>
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+
+
+
+---
+
+<tool-use data-tool-type="write" data-tool-name="search_replace">
+
+<details><summary>Tool use: **search_replace** • Edit file: compress_pngs.py</summary>
+
+**Chunk 1**
+Lines added: 2, lines removed: undefined
+
+```diff
+@@ -291,4 +291,6 @@
+      skipped = 0
+      failed = 0
++     corrupted = 0
++     corrupted_files = []
+      total_original_size = 0
+      total_new_size = 0
+```
+
+**Chunk 2**
+Lines added: 1, lines removed: 1
+
+```diff
+@@ -306,5 +308,5 @@
+          for future in as_completed(future_to_file):
+              result = future.result()
+-             file_path, success, error, orig_size, new_size, savings_pct, was_skipped = result
++             file_path, success, error, orig_size, new_size, savings_pct, was_skipped, is_corrupted = result
+              
+              if success:
+```
+
+**Chunk 3**
+Lines added: 1, lines removed: 1
+
+```diff
+@@ -325,5 +327,5 @@
+                  if processed == 1 or time_since_update &gt;= 0.5:
+                      rate = processed / elapsed if elapsed &gt; 0 else 0
+-                     remaining = len(png_files) - processed
++                     remaining = len(png_files) - processed - failed
+                      eta_seconds = remaining / rate if rate &gt; 0 and remaining &gt; 0 else 0
+                      
+```
+
+**Chunk 4**
+Lines added: 9, lines removed: 4
+
+```diff
+@@ -335,12 +337,17 @@
+                      
+                      print(f"[{processed:5d}/{len(png_files)}] "
+-                           f"Compressed: {compressed} | Skipped: {skipped} | "
++                           f"Compressed: {compressed} | Skipped: {skipped} | Corrupted: {corrupted} | "
+                            f"Speed: {rate:.1f} files/sec | "
+                            f"Elapsed: {elapsed_str} | ETA: {eta_str} | "
+                            f"Saved: {format_size(total_savings)} ({total_savings_pct:.1f}%)", end='\r')
+                      last_update_time = current_time
+-             else:
+-                 failed += 1
+-                 print(f"\n[ERROR] Failed to compress {file_path}: {error}")
++             else:
++                 if is_corrupted:
++                     corrupted += 1
++                     corrupted_files.append((file_path, error))
++                     print(f"\n[CORRUPTED] {file_path}: {error}")
++                 else:
++                     failed += 1
++                     print(f"\n[ERROR] Failed to compress {file_path}: {error}")
+      
+      total_time = time.time() - start_time
+```
+
+</details>
+
+</tool-use>
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+
+
+
+---
+
+<tool-use data-tool-type="write" data-tool-name="search_replace">
+
+<details><summary>Tool use: **search_replace** • Edit file: compress_pngs.py</summary>
+
+**Chunk 1**
+Lines added: 2, lines removed: undefined
+
+```diff
+@@ -363,4 +363,6 @@
+      if jpg_files:
+          print(f"Ignored (JPG/JPEG): {len(jpg_files)} files")
++     if corrupted &gt; 0:
++         print(f"Corrupted (bad PNGs): {corrupted} files")
+      print(f"Failed: {failed} files")
+      print(f"Total time: {format_time(total_time)}")
+```
+
+**Chunk 2**
+Lines added: 9, lines removed: undefined
+
+```diff
+@@ -369,4 +371,13 @@
+      print(f"Compressed size: {format_size(total_new_size)}")
+      print(f"Total savings: {format_size(total_savings)} ({total_savings_pct:.1f}%)")
++     
++     # Print list of corrupted files if any
++     if corrupted_files:
++         print("\n" + "=" * 80)
++         print("CORRUPTED FILES LIST:")
++         print("=" * 80)
++         for file_path, error in corrupted_files:
++             print(f"  {file_path}")
++             print(f"    Reason: {error}")
+  
+  if __name__ == '__main__':
+```
+
+</details>
+
+</tool-use>
+
+---
+
+<tool-use data-tool-type="generic" data-tool-name="read_lints">
+<details>
+          <summary>Tool use: **read_lints** • Read lints for 1 file</summary>
+      
+Lint paths:
+
+- `compress_pngs.py`
+
+Lint results
+
+
+**No lint errors found**
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+Updated the script to detect and report corrupted PNGs. It now:
+
+1. **Detects 0-byte files** — flags empty/placeholder files
+2. **Validates image loading** — checks if the PNG can be opened and loaded
+3. **Checks dimensions** — flags files with 0x0 or invalid dimensions
+4. **Detects suspicious all-black images** — flags images that are all black with suspiciously small file sizes (potential corruption)
+5. **Tracks corrupted files separately** — counts them separately from regular failures
+6. **Reports in real-time** — shows `[CORRUPTED]` messages as they're found
+7. **Summary report** — includes corrupted file count in the final summary
+8. **Detailed list** — prints a list of all corrupted files with reasons at the end
+
+The script will now:
+- Show corrupted files in the progress output: `Corrupted: X`
+- Print `[CORRUPTED]` messages when found
+- List all corrupted files with their specific error reasons at the end
+
+This should catch the issues you mentioned: black images, cut-off images, and 0-byte placeholder files.
+
+---
+
+_**User (2025-12-11 21:39Z)**_
+
+@pwsh (155-303) nice! can we make it so it moves all of them from input\corrupted to another folder to isolate them?
+
+---
+
+_**Agent (model default, mode Agent)**_
+
+
+
+---
+
+
+Updating the script to move corrupted files to a `corrupted` folder, preserving the directory structure:
+
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+
+
+
+---
+
+<tool-use data-tool-type="write" data-tool-name="search_replace">
+
+<details><summary>Tool use: **search_replace** • Edit file: compress_pngs.py</summary>
+
+**Chunk 1**
+Lines added: 25, lines removed: undefined
+
+```diff
+@@ -208,4 +208,29 @@
+      return output_dir / relative_path
+  
++ def move_to_corrupted(input_path, input_dir, corrupted_dir):
++     """Move a corrupted file to the corrupted folder, preserving directory structure."""
++     try:
++         input_path = Path(input_path)
++         input_dir = Path(input_dir)
++         corrupted_dir = Path(corrupted_dir)
++         
++         # Get relative path from input directory
++         try:
++             relative_path = input_path.relative_to(input_dir)
++         except ValueError:
++             relative_path = input_path.name
++         
++         # Create destination path
++         dest_path = corrupted_dir / relative_path
++         
++         # Ensure destination directory exists
++         dest_path.parent.mkdir(parents=True, exist_ok=True)
++         
++         # Move the file
++         input_path.rename(dest_path)
++         return True, None
++     except Exception as e:
++         return False, str(e)
++ 
+  def format_size(size_bytes):
+      """Format file size in human readable format."""
+```
+
+</details>
+
+</tool-use>
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+
+
+
+---
+
+<tool-use data-tool-type="write" data-tool-name="search_replace">
+
+<details><summary>Tool use: **search_replace** • Edit file: compress_pngs.py</summary>
+
+**Chunk 1**
+Lines added: 4, lines removed: 1
+
+```diff
+@@ -305,6 +305,9 @@
+      print(f"Found {len(png_files)} PNG files to process.")
+      
+-     # Create output directory
++     # Create output and corrupted directories
+      output_dir.mkdir(exist_ok=True)
++     corrupted_dir = Path('corrupted')
++     corrupted_dir.mkdir(exist_ok=True)
++     print(f"Corrupted files will be moved to: {corrupted_dir}")
+      
+      # Use all available CPU cores
+```
+
+</details>
+
+</tool-use>
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+
+
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+
+
+
+---
+
+<tool-use data-tool-type="write" data-tool-name="search_replace">
+
+<details><summary>Tool use: **search_replace** • Edit file: compress_pngs.py</summary>
+
+**Chunk 1**
+Lines added: 8, lines removed: 2
+
+```diff
+@@ -373,6 +373,12 @@
+                  if is_corrupted:
+                      corrupted += 1
+-                     corrupted_files.append((file_path, error))
+-                     print(f"\n[CORRUPTED] {file_path}: {error}")
++                     # Move corrupted file to corrupted folder
++                     move_success, move_error = move_to_corrupted(file_path, input_dir, corrupted_dir)
++                     if move_success:
++                         corrupted_files.append((file_path, error, f"Moved to {corrupted_dir / Path(file_path).relative_to(input_dir)}"))
++                         print(f"\n[CORRUPTED] {file_path}: {error} -&gt; Moved to corrupted folder")
++                     else:
++                         corrupted_files.append((file_path, error, f"Failed to move: {move_error}"))
++                         print(f"\n[CORRUPTED] {file_path}: {error} (Failed to move: {move_error})")
+                  else:
+                      failed += 1
+```
+
+</details>
+
+</tool-use>
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: compress_pngs.py</summary>
+
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+
+
+
+---
+
+<tool-use data-tool-type="write" data-tool-name="search_replace">
+
+<details><summary>Tool use: **search_replace** • Edit file: compress_pngs.py</summary>
+
+**Chunk 1**
+Lines added: 10, lines removed: 3
+
+```diff
+@@ -411,7 +411,14 @@
+          print("CORRUPTED FILES LIST:")
+          print("=" * 80)
+-         for file_path, error in corrupted_files:
+-             print(f"  {file_path}")
+-             print(f"    Reason: {error}")
++         for item in corrupted_files:
++             if len(item) == 3:
++                 file_path, error, move_status = item
++                 print(f"  {file_path}")
++                 print(f"    Reason: {error}")
++                 print(f"    Status: {move_status}")
++             else:
++                 file_path, error = item
++                 print(f"  {file_path}")
++                 print(f"    Reason: {error}")
+  
+  if __name__ == '__main__':
+```
+
+</details>
+
+</tool-use>
+
+---
+
+<tool-use data-tool-type="generic" data-tool-name="read_lints">
+<details>
+          <summary>Tool use: **read_lints** • Read lints for 1 file</summary>
+      
+Lint paths:
+
+- `compress_pngs.py`
+
+Lint results
+
+
+**No lint errors found**
+</details>
+</tool-use>
+
+---
+
+
+
+---
+
+
+Updating `.gitignore` to ignore the `corrupted` folder:
+
+
+---
+
+<tool-use data-tool-type="read" data-tool-name="read_file">
+<details><summary>Tool use: **read_file** • Read file: .gitignore</summary>
+
+</details>
+</tool-use>
+
+---
+
+<tool-use data-tool-type="write" data-tool-name="search_replace">
+
+<details><summary>Tool use: **search_replace** • Edit file: .gitignore</summary>
+
+**Chunk 1**
+Lines added: 1, lines removed: undefined
+
+```diff
+@@ -1,4 +1,5 @@
+  input/
+  output/
++ corrupted/
+  
+  
+```
+
+</details>
+
+</tool-use>
+
+---
+
+
+
+---
+
+
+Updated the script to automatically move corrupted PNG files to a `corrupted` folder. It will:
+
+1. **Create a `corrupted` folder** at the root level
+2. **Move corrupted files** there when detected, preserving the directory structure (e.g., `input\Pack2BagScan_animation 6c\file.png` → `corrupted\Pack2BagScan_animation 6c\file.png`)
+3. **Report the move** in real-time, showing where each file was moved
+4. **Show move status** in the final summary
+
+The script will now:
+- Display `[CORRUPTED] file.png: error -> Moved to corrupted folder` when moving files
+- List all moved files in the summary with their new locations
+- Keep corrupted files isolated from your input folder
+
+Also updated `.gitignore` to ignore the `corrupted` folder. When you run the script, corrupted files will be automatically moved out of the input folder and into the corrupted folder, making it easy to identify and handle them separately.
+
+---
+

compress_pngs.py

@@ -31,13 +31,55 @@ def compress_png(input_path, output_path, force_bitdepth=None):
             new_size = os.path.getsize(output_path)
             savings = original_size - new_size
             savings_pct = (savings / original_size * 100) if original_size > 0 else 0
-            return (str(input_path), True, None, original_size, new_size, savings_pct, True)
+            return (str(input_path), True, None, original_size, new_size, savings_pct, True, False)
         
         # Ensure output directory exists
         output_path.parent.mkdir(parents=True, exist_ok=True)
         
         original_size = os.path.getsize(input_path)
-        img = Image.open(input_path)
+        
+        # Check for corrupted/empty files
+        if original_size == 0:
+            return (str(input_path), False, "CORRUPTED: File is 0 bytes (empty/placeholder)", 0, 0, 0, False, True)
+        
+        # Try to open and validate the image
+        try:
+            img = Image.open(input_path)
+            # Force load to detect corruption early
+            img.load()
+        except Exception as e:
+            return (str(input_path), False, f"CORRUPTED: Cannot open/load image - {str(e)}", original_size, 0, 0, False, True)
+        
+        # Validate image dimensions
+        if img.width == 0 or img.height == 0:
+            return (str(input_path), False, f"CORRUPTED: Invalid dimensions ({img.width}x{img.height})", original_size, 0, 0, False, True)
+        
+        # Check if image appears completely black (potential corruption indicator)
+        # But be careful - some images might legitimately be black
+        # We'll only flag this if the file is suspiciously small for its dimensions
+        try:
+            # Sample a few pixels to check if all are black
+            sample_size = min(100, img.width * img.height)
+            pixels = list(img.getdata()[:sample_size])
+            if pixels:
+                # Check if all sampled pixels are black (0 or (0,0,0) or (0,0,0,0))
+                all_black = True
+                for pixel in pixels:
+                    if isinstance(pixel, (tuple, list)):
+                        if any(p > 0 for p in pixel):
+                            all_black = False
+                            break
+                    else:
+                        if pixel > 0:
+                            all_black = False
+                            break
+                
+                # If all black AND file is suspiciously small, flag as potentially corrupted
+                if all_black and original_size < (img.width * img.height * 0.1):  # Less than 0.1 bytes per pixel
+                    return (str(input_path), False, f"CORRUPTED: Image appears all black with suspiciously small file size", original_size, 0, 0, False, True)
+        except:
+            # If we can't check pixels, continue anyway
+            pass
         
         # Determine target bit depth
         if force_bitdepth == '8':
@@ -131,9 +173,11 @@ def compress_png(input_path, output_path, force_bitdepth=None):
         new_size = os.path.getsize(output_path)
         savings = original_size - new_size
         savings_pct = (savings / original_size * 100) if original_size > 0 else 0
-        return (str(input_path), True, None, original_size, new_size, savings_pct, False)
+        return (str(input_path), True, None, original_size, new_size, savings_pct, False, False)
     except Exception as e:
-        return (str(input_path), False, str(e), 0, 0, 0, False)
+        # Check if error might indicate corruption
+        is_corrupted = "truncated" in str(e).lower() or "cannot identify" in str(e).lower() or "corrupt" in str(e).lower()
+        return (str(input_path), False, str(e), 0, 0, 0, False, is_corrupted)
 
 def find_image_files(input_dir):
     """Find all PNG and JPG files in subdirectories."""
@@ -163,6 +207,31 @@ def get_output_path(input_path, input_dir, output_dir):
     # Create output path
     return output_dir / relative_path
 
+def move_to_corrupted(input_path, input_dir, corrupted_dir):
+    """Move a corrupted file to the corrupted folder, preserving directory structure."""
+    try:
+        input_path = Path(input_path)
+        input_dir = Path(input_dir)
+        corrupted_dir = Path(corrupted_dir)
+        
+        # Get relative path from input directory
+        try:
+            relative_path = input_path.relative_to(input_dir)
+        except ValueError:
+            relative_path = input_path.name
+        
+        # Create destination path
+        dest_path = corrupted_dir / relative_path
+        
+        # Ensure destination directory exists
+        dest_path.parent.mkdir(parents=True, exist_ok=True)
+        
+        # Move the file
+        input_path.rename(dest_path)
+        return True, None
+    except Exception as e:
+        return False, str(e)
+
 def format_size(size_bytes):
     """Format file size in human readable format."""
     for unit in ['B', 'KB', 'MB', 'GB']:
@@ -235,8 +304,11 @@ def main():
     
     print(f"Found {len(png_files)} PNG files to process.")
     
-    # Create output directory
+    # Create output and corrupted directories
     output_dir.mkdir(exist_ok=True)
+    corrupted_dir = Path('corrupted')
+    corrupted_dir.mkdir(exist_ok=True)
+    print(f"Corrupted files will be moved to: {corrupted_dir}")
     
     # Use all available CPU cores
     max_workers = multiprocessing.cpu_count()
@@ -246,6 +318,8 @@ def main():
     compressed = 0
     skipped = 0
     failed = 0
+    corrupted = 0
+    corrupted_files = []
     total_original_size = 0
     total_new_size = 0
     start_time = time.time()
@@ -261,7 +335,7 @@ def main():
         # Process results as they complete
         for future in as_completed(future_to_file):
             result = future.result()
-            file_path, success, error, orig_size, new_size, savings_pct, was_skipped = result
+            file_path, success, error, orig_size, new_size, savings_pct, was_skipped, is_corrupted = result
             
             if success:
                 if was_skipped:
@@ -280,7 +354,7 @@ def main():
                 # Update every file or every 0.5 seconds, whichever comes first
                 if processed == 1 or time_since_update >= 0.5:
                     rate = processed / elapsed if elapsed > 0 else 0
-                    remaining = len(png_files) - processed
+                    remaining = len(png_files) - processed - failed
                     eta_seconds = remaining / rate if rate > 0 and remaining > 0 else 0
                     
                     total_savings = total_original_size - total_new_size
@@ -290,14 +364,25 @@ def main():
                     elapsed_str = format_time(elapsed)
                     
                     print(f"[{processed:5d}/{len(png_files)}] "
-                          f"Compressed: {compressed} | Skipped: {skipped} | "
+                          f"Compressed: {compressed} | Skipped: {skipped} | Corrupted: {corrupted} | "
                           f"Speed: {rate:.1f} files/sec | "
                           f"Elapsed: {elapsed_str} | ETA: {eta_str} | "
                           f"Saved: {format_size(total_savings)} ({total_savings_pct:.1f}%)", end='\r')
                     last_update_time = current_time
             else:
-                failed += 1
+                if is_corrupted:
-                print(f"\n[ERROR] Failed to compress {file_path}: {error}")
+                    corrupted += 1
+                    # Move corrupted file to corrupted folder
+                    move_success, move_error = move_to_corrupted(file_path, input_dir, corrupted_dir)
+                    if move_success:
+                        corrupted_files.append((file_path, error, f"Moved to {corrupted_dir / Path(file_path).relative_to(input_dir)}"))
+                        print(f"\n[CORRUPTED] {file_path}: {error} -> Moved to corrupted folder")
+                    else:
+                        corrupted_files.append((file_path, error, f"Failed to move: {move_error}"))
+                        print(f"\n[CORRUPTED] {file_path}: {error} (Failed to move: {move_error})")
+                else:
+                    failed += 1
+                    print(f"\n[ERROR] Failed to compress {file_path}: {error}")
     
     total_time = time.time() - start_time
     total_savings = total_original_size - total_new_size
@@ -311,6 +396,8 @@ def main():
     print(f"Skipped (already exist): {skipped} files")
     if jpg_files:
         print(f"Ignored (JPG/JPEG): {len(jpg_files)} files")
+    if corrupted > 0:
+        print(f"Corrupted (bad PNGs): {corrupted} files")
     print(f"Failed: {failed} files")
     print(f"Total time: {format_time(total_time)}")
     print(f"Average speed: {avg_rate:.2f} files/second")
@@ -318,6 +405,22 @@ def main():
     print(f"Compressed size: {format_size(total_new_size)}")
     print(f"Total savings: {format_size(total_savings)} ({total_savings_pct:.1f}%)")
     
+    # Print list of corrupted files if any
+    if corrupted_files:
+        print("\n" + "=" * 80)
+        print("CORRUPTED FILES LIST:")
+        print("=" * 80)
+        for item in corrupted_files:
+            if len(item) == 3:
+                file_path, error, move_status = item
+                print(f"  {file_path}")
+                print(f"    Reason: {error}")
+                print(f"    Status: {move_status}")
+            else:
+                file_path, error = item
+                print(f"  {file_path}")
+                print(f"    Reason: {error}")
+
 if __name__ == '__main__':
     main()