How to save a video in mp4 format in python

I need to save a video in mp4 format using python. I searched many articles available and also went through many question on stackoverflow but did not find them helpful. I used different codec like MP4V, H264 etc. but they are throwing FFMPEG error. Any help will be appreciated.

Error:

OpenCV: FFMPEG: tag 0x5634504d/'MP4V' is not supported with codec id 13 and format 'mp4 / MP4 (MPEG-4 Part 14)' OpenCV: FFMPEG: fallback to use tag 0x00000020/' ???'

Links: Writing an mp4 video using python opencv

openCV video saving in python

No video output OpenCV Python