New answers tagged screen-capture
You can do it with two pieces of hardware. You need a Apple Lightning to HDMI adapter and a HDMI video capture card. Simply connect the iOS device to the adapter and the adapter to the video capture card and you are good to go.
FFmpeg is a time-based media processor and as such strives to maintain temporal relation of the input unless instructed otherwise. The framerate option for the x11grab device sets the grabbing frame rate. If there are fewer or greater frames supplied each second, then ffmpeg will duplicate or drop the difference, respectively.
It's been so long since it was asked that probably nobody will care, but just in case someone stumbles upon this question, it's perfectly possible (as of now, I don't know whether it was back then) to capture the screen using ffmpeg in Mac OS X using the "avfoundation" device. To get a list of available sources: ffmpeg -f avfoundation -list_devices true ...
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