diff --git a/shells/ffmpeg.nix b/shells/ffmpeg.nix
index 77dca0d..e09923f 100644
--- a/shells/ffmpeg.nix
+++ b/shells/ffmpeg.nix
@@ -17,15 +17,15 @@ let
       BITRATE="''${2:-128k}"
 
       ${ffmpegExe} -i $INPUT_FILE_NAME \
-        -map_metadata -1 \
-        -fflags +bitexact \
-        -flags:v +bitexact \
-        -flags:a +bitexact \
         -b:a $BITRATE \
         -c:a libopus \
         $TEMPORARY_FILE_NAME
 
       ${ffmpegExe} -i $TEMPORARY_FILE_NAME \
+        -map_metadata -1 \
+        -fflags +bitexact \
+        -flags:v +bitexact \
+        -flags:a +bitexact \
         -c:a copy \
         -f mp4 \
         $TARGET_FILE_NAME