Ps4 – How to disable “Screenshot Saved” notification

As per the FAQ,

Will the DUALSHOCK 4 controller’s 3.5mm headset jack support other headsets or headphones?

The PS Vita system’s headset is fully supported. Some other third-party headsets may support basic audio and chat functionality on PS4, but Sony Computer Entertainment cannot guarantee it.

So maybe. It depends on your headset. If it works in a Vita, it should work in a Dualshock 4 as well. As per this, the buds for the iPhone will likely work, but the best way to find out is to try. The compatibility concern is largely with Bluetooth and USB headsets.

It's not so much "capturing and recognizing" as that 3.5mm jacks with mic output (TRRS)(3 rings) are physically different than those without (TRS)(2 rings). If it has the ring to connect a mic signal, it will have a signal and if it doesn't, it won't. Signal v. no signal is pretty simple electrical engineering to sort out so that's nothing to be concerned about - headphones are already known to work. As per the vita headset working and the above information, so too should most 3.5mm headsets.

The concern with the mic is recognizing different implementations of TRRS because there are two standards (OMTP and CTIA) which have two rings flipped, but most devices nowadays have that fairly sorted. I'll test with an iphone's earbuds(with mic) at my earliest convenience and update the answer with results.

If you're using the screenshot config for the Share button, then a long press will take you to the Share menu.

I use this same config and sometimes mine will take an extra screenshot or two when trying to get in there.

I'm not sure if it's just some jitter on the button itself, or if the firmware is flaky when it comes to interpreting the Share button press, or whatever else could be wrong with it, but the behaviour you describe lines up with my own experience.