The recorded Video freezes every few seconds.

[FalconCreates]

Every recorded video works as in the example below.

Presentation of the problem
In the video, I slowly move the program window. Because of a recording problem, the result is almost a slideshow. This is not a computer speed issue in my opinion. It has an i9 + GTX 1080Ti.

q39yYuocHd.mp4

Potential cause of the problem
Perhaps this is due to the faulty Custom Commands I use to record both computer and microphone audio at the same time.
The code I am using I copied from this thread: #119

-rtbufsize 150M -f gdigrab -framerate $fps$ -offset_x $area_x$ -offset_y $area_y$ -video_size $area_width$x$area_height$ -draw_mouse $cursor$ -i desktop -f dshow -i audio="virtual-audio-capturer" -f dshow -i audio="Microphone (6- Shure MV7)" -filter_complex amix=inputs=2:duration=first:dropout_transition=3 -c:v libx264 -r $fps$ -preset ultrafast -tune zerolatency -crf 30 -pix_fmt yuv420p -movflags +faststart -c:a libmp3lame -qscale:a 4 -y "$output$"

Here are screen shots of my settings.

How to fix it?

Thank you in advance for any attempts to help fix this problem.