neuroscience - Could an action potential produce few or more neurotransmitters based on the stimulus received?

I reckon that if you would be able to widen the AP width, it would produce more neurotransmitters in that larger time interval. Is that correct? Or does the neuron have a standard amount of neurotransmitters it releases in order to pass the signal post-synaptically?

(bonus: could it NOT result in neurotransmitter release, or does the definition of an AP include the release of neurotransmitters?)