diff --git a/vid_convert.py b/vid_convert.py
index 1ea1156..0af7f07 100755
--- a/vid_convert.py
+++ b/vid_convert.py
@@ -273,8 +273,8 @@ def create_mkv(filename):
 
 
 def mkv_to_mp4(filename):
-    options = "-c:a copy -c:v copy -c:s copy -movflags faststart"
-    command = f"ffmpeg -loglevel error -i {filename}_FINAL.mkv {options} -y NEW_{filename}.mp4"
+    options = "-map 0 -c:a copy -c:v copy -c:s copy -movflags faststart"
+    command = f"ffmpeg -loglevel error -i {filename}_FINAL.mkv {options} -y NEW_{filename[:-4]}.mp4"
     result = subprocess.getoutput(command)
     if result != "":
         logging.error(result)