Hello all,
I have an application that uses broadcast extension of Replay kit to record the entire screen and mic sound to a file on iOS. Up until some months ago, everything was smooth. Currently I am facing the following issue.
If another app uses the microphone, then I loose the sound and never comes back. In order to debug this issue I have added a log to the processSampleBuffer, that logs a text each time it receives a .audioMic buffer type. I start the recording and everything works as expected. Later on, I go onto an app that uses microphone, and then I do not get any log for audioMic. I stop the recording on that app, but the sound never comes back. This as a result makes my video file to not have any sound at all.
In the above context I also noticed that even with Photos app broadcast extension, if you start recording a video, and you go to Speech to text feature of the keyboard, then the sound is joined. While the STT is on, there is no sound and the sound of whatever comes after STT stops is joined to the sound before the STT starts, so I guess that this is something general.
Also on the same research I did, I saw that google Meet app does not allow any microphone to be used from another app while you are in a meet (Even the STT is grayed out).
I would like to know my options here. What can I do to have a valid video file with sound? How can I not allow other apps to use the microphone while my app is recording? Is there any entitlement? How does Google Meet do that?
P.S. I have added an observer to observe the interruptions for the session and the type .began runs, but the type .ended does not, so I can not actually set the AVAudioSession to active again.