get_latest_frame() returns None

[kapeed7]

I think d.get_latest_frame() doesn't waits for the frame buffer to populate after d.capture() is called.

While manually waiting for that resolves the issue:

Just curious if the checks have intentionally been ignored considering performance....

[Hellikandra]

Your implementation is near to be correct :-).

ret = d.caputre()
time.sleep(0.1)

while True:
    d.get_latest_frame()

Try this implementation. The capture while be greater.
I do not search more about that but I just think that d.capture() need some time before initialization.