Add extra content to the video

[antoescu]

First of all thank you @piemonte for this perfect project, it helps a lot.

This is not an issue but a question that may not be in the project at the moment. In my case I'd like to record the video with uiviews on it (i.e. images). I have tried adding them as subviews of the previewView and as sublayers of the previewLayer without success. I know this library only records what the ios camera buffer is passing to the device. Is there a way to achieve this that I am trying to do with your library? Maybe mixing the recording from your library with other method to record those uiviews?

I'd like to know if you have any suggestion, any help would be really appreciated. Thanks for the project!