mp4v is not supported with codec id 12

[medanisjbara]

vid.py is giving me this error after i press 'q'

[ WARN:0] global C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-5rb_9df3\opencv\modules\videoio\src\cap_msmf.cpp (434) `anonymous-namespace'::SourceReaderCB::~SourceReaderCB terminating async callback
OpenCV: FFMPEG: tag 0x5634504d/'MP4V' is not supported with codec id 12 and format 'mp4 / MP4 (MPEG-4 Part 14)'
OpenCV: FFMPEG: fallback to use tag 0x7634706d/'mp4v'

and the out.mp4 is an empty video (256 bites long and doesn't output anything)

https://user-images.githubusercontent.com/74317212/111001509-30a56700-8384-11eb-835c-8e83124c9fc2.mp4 i'm using a laptop, the program works perfectly and i can see myself cartoonified on the camera but the video doesn't get saved