Writing video with OpenCV + Python + Mac

Question

I keep getting an assertion error when I\'m trying to write frames to video. The error I\'m getting is this:

Traceback (most recent call last):
  File \"Vide         


        

Answer 1

I tried various codecs including 'MJPG' and 'I420' and none of them worked on my Mac OpenCV build. They produced tiny unviewable output files without complaining.

Then I found this page which lists some codecs that worked for me. E.g. 'mp4v' works fine on my Mac and QuickTime is able to play it.