FLAC in .mov container not working

Hey, a file encoded with the following command

ffmpeg -i input.mov -i test.mp3 -vcodec mjpeg -acodec flac test.mov

Does not play in VLC player, reporting:

"VLC does not support the audio or video format "ms��". Unfortunately there is no way for you to fix this." (The format tag characters here pasted correctly from the error window).

This video plays correctly, but no audio.

This should work, right?

Thanks

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