diff --git a/odmpy/processing/shared.py b/odmpy/processing/shared.py
index 669d5df..59a6e88 100644
--- a/odmpy/processing/shared.py
+++ b/odmpy/processing/shared.py
@@ -402,6 +402,8 @@ def merge_into_mp3(
             f"concat:{'|'.join([str(ft['file']) for ft in file_tracks])}",
             "-acodec",
             "copy",
+            "-vcodec",
+            "copy",
             "-b:a",
             f"{audio_bitrate}k"
             if audio_bitrate