Update videogenerator.py

videogenerator.py

@@ -155,23 +155,25 @@ class VideoGenerator:
         return out_path
 
     def _merge_audio_video(self, video_path, audio_path, out_path):
-        if not FFMPEG_AVAILABLE:
-            raise RuntimeError("ffmpeg-python not available")
-        
-        try:
-            (
-                ffmpeg
-                .input(video_path)
-                .input(audio_path)
-                .output(out_path, vcodec='copy', acodec='aac', shortest=None)
-                .overwrite_output()
-                .run(quiet=True, capture_stdout=True, capture_stderr=True)
-            )
-        except Exception as e:
-            logger.error(f"Failed to merge audio and video: {e}")
-            raise
-        
-        return out_path
+    if not FFMPEG_AVAILABLE:
+        raise RuntimeError("ffmpeg-python not available")
+
+    try:
+        video_in = ffmpeg.input(video_path)
+        audio_in = ffmpeg.input(audio_path)
+        (
+            ffmpeg
+            .output(video_in, audio_in, out_path, vcodec='libx264', acodec='aac', shortest=None)
+            .overwrite_output()
+            .run(quiet=True, capture_stdout=True, capture_stderr=True)
+        )
+        logger.info(f"Merged video and audio into {out_path}")
+    except Exception as e:
+        logger.error(f"Failed to merge audio and video: {e}")
+        raise
+
+    return out_path
+
 
     # ---------------- Enhancement Modules ----------------
     def enhance_video(self, input_path, scale=2, smooth=True):