I had a look on how fast I can write to disk and this could be a bottleneck, if I want to reach the 100 fps, but at the moment, the Frame rate is limited to 9 - 10 fps. So this could not be the problem, now. I am already writing my images as PNGs.
What do you mean with "N workers"? and how could it look like, if I create for each frame an new reference, I cannot imagine this.
Thanks for your help!
Unfortunately, this example did not help me, the increasing of the max queue size did not show any effect on my frame rate.
But thanks for your help!