That's how it's done, where on dual core devices, a JPEG encode can be done in parallel to capture. Try it on an iPhone 5 with "infinite shutter" disabled and

That's how it's done, where on dual core devices, a JPEG encode can be done in parallel to capture. Try it on an iPhone 5 with "infinite shutter" disabled and you will see the dropped frames in the filenames once you import them to your machine from iTunes App File Sharing (or over SSH if you're jailbroken).