In my output video there a pulse that occurs after the number of frames specified in the "GOP Size" setting. With the setting of 18 that I have in the image shown below, the pulse occurs every 18 frames. During this "pulse", the video seems to move to a lower picture quality and then quickly returns back to a high quality.
Here are my output settings:
If I set "GOP Size" to zero, the picture quality of the video degrades substantially. The maximum value for "GOP Size" seems to be 100, so the pulses occur a little over 3 seconds apart.
Is there anything I can do to alleviate this?
Any idea what I might be doing wrong?