diff --git a/cut_head.py b/cut_head.py
index 434c38f..f0f71f3 100644
--- a/cut_head.py
+++ b/cut_head.py
@@ -58,25 +58,30 @@ def smart_cut(input_video, output_video, cut_timestamp):
 
     try:
         # 1. Re-encode the tiny segment (from exact cut to next keyframe)
+        # Audio is removed (-an) to prevent sync/overlap issues during concatenation
         subprocess.run([
             'ffmpeg', '-y', '-v', 'error', '-i', input_video, 
             '-ss', str(cut_timestamp), '-to', str(next_keyframe), 
-            '-c:v', 'libx264', '-crf', '18', '-c:a', 'copy', part1
+            '-c:v', 'libx264', '-crf', '18', '-an', part1
         ], check=True)
         
         # 2. Copy the rest of the video (from next keyframe to the end)
+        # Audio is removed (-an) here too
         subprocess.run([
             'ffmpeg', '-y', '-v', 'error', '-ss', str(next_keyframe), '-i', input_video, 
-            '-c:v', 'copy', '-c:a', 'copy', part2
+            '-c:v', 'copy', '-an', part2
         ], check=True)
         
-        # 3. Concatenate them using a text list (Forced UTF-8 encoding for emojis/special chars)
+        # 3. Concatenate video parts and cleanly mux with the original extracted audio
         with open(concat_list, 'w', encoding='utf-8') as f:
             f.write(f"file '{part1}'\nfile '{part2}'\n")
             
         subprocess.run([
-            'ffmpeg', '-y', '-v', 'error', '-f', 'concat', '-safe', '0', 
-            '-i', concat_list, '-c', 'copy', output_video
+            'ffmpeg', '-y', '-v', 'error', 
+            '-f', 'concat', '-safe', '0', '-i', concat_list, 
+            '-ss', str(cut_timestamp), '-i', input_video,
+            '-map', '0:v', '-map', '1:a?', 
+            '-c:v', 'copy', '-c:a', 'copy', output_video
         ], check=True)
         print(f"Success! Saved to {output_video}")
 
diff --git a/cut_tail.py b/cut_tail.py
index 55b28f9..5c47e13 100644
--- a/cut_tail.py
+++ b/cut_tail.py
@@ -71,31 +71,39 @@ def smart_cut_tail(input_video, output_video, tail_duration):
 
     try:
         # 3. Copy the bulk of the video (from 0 to the preceding keyframe)
+        # Audio is removed (-an) to prevent sync/overlap issues
         if prev_keyframe > 0.0:
             subprocess.run([
                 'ffmpeg', '-y', '-v', 'error', '-i', input_video, 
                 '-t', str(prev_keyframe), 
-                '-c:v', 'copy', '-c:a', 'copy', part1
+                '-c:v', 'copy', '-an', part1
             ], check=True)
         
         # 4. Re-encode the tiny tip (from the preceding keyframe to the exact cut timestamp)
+        # Audio is removed (-an) here too
         tiny_duration = cut_timestamp - prev_keyframe
-        subprocess.run([
-            'ffmpeg', '-y', '-v', 'error', 
-            '-ss', str(prev_keyframe), '-i', input_video, 
-            '-t', str(tiny_duration), 
-            '-c:v', 'libx264', '-crf', '18', '-c:a', 'copy', part2
-        ], check=True)
+        if tiny_duration > 0.0:
+            subprocess.run([
+                'ffmpeg', '-y', '-v', 'error', 
+                '-ss', str(prev_keyframe), '-i', input_video, 
+                '-t', str(tiny_duration), 
+                '-c:v', 'libx264', '-crf', '18', '-an', part2
+            ], check=True)
         
-        # 5. Concatenate them using a text list (Forced UTF-8 encoding for emojis/special chars)
+        # 5. Concatenate video parts and cleanly mux with the original extracted audio
         with open(concat_list, 'w', encoding='utf-8') as f:
             if prev_keyframe > 0.0:
                 f.write(f"file '{part1}'\n")
-            f.write(f"file '{part2}'\n")
+            if tiny_duration > 0.0:
+                f.write(f"file '{part2}'\n")
             
         subprocess.run([
-            'ffmpeg', '-y', '-v', 'error', '-f', 'concat', '-safe', '0', 
-            '-i', concat_list, '-c', 'copy', output_video
+            'ffmpeg', '-y', '-v', 'error', 
+            '-f', 'concat', '-safe', '0', '-i', concat_list, 
+            '-i', input_video,
+            '-map', '0:v', '-map', '1:a?', 
+            '-c:v', 'copy', '-c:a', 'copy', 
+            '-t', str(cut_timestamp), output_video
         ], check=True)
         print(f"Success! Saved to {output_video}")