[Python] mp4 generated with moviepy only appears as audio in vscode, and only video in finder

I have a few video clips I am concatenating with moviepy. However, upon making the video file and saving it, it is not behaving expectedly.

I am using VSCode as my editor, and when I click on the generated mp4 in VSCode, I can only play the audio of the file. It is the expected audio.

On the other hand, when I navigate to the file in Finder, the mp4 only displays as a video with no audio. I am bewildered as to why this is.

When I share the video, it still is just visual with no audio.

Here is the code I am using to save:

titleClip = __createClip(script.titleSCFile, script.titleAudioClip, marginSize)
print("screenshot file: ", script.titleSCFile)# screenshot file: screenshots/<filename>.png
print("Duration: ",script.titleAudioClip.duration) #Duration: 3.55
titleClip.write_videofile(
'test_combine_aud_and_vid.mp4',
codec = 'mpeg4',
bitrate = config["Video"]["Bitrate"], #8000k
threads = config["Video"]["Threads"] #12
)


The __createClip function takes in a png, an audio file, and turns it into a video clip:

def __createClip(screenShotFile, audioClip, marginSize):
imageClip = ImageClip(
screenShotFile,
duration=audioClip.duration
).set_position(("center", "center"))
imageClip = imageClip.resize(width=(w-marginSize))
videoClip = imageClip.set_audio(audioClip)
videoClip.fps = 1
return videoClip


I tried saving the clips before concatenating, and they have the same error. The video and audio files are of the same length too.

I expected the mp4 to be appear the same in both locations, with audio and video. This issue occurs with every image file and audio clip that I try.

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