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perchco / perchrtc

An iOS WebRTC demo using XirSys servers
MIT License
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Capture All Audio While Audio Session is Active? #31

Open nsalerni opened 8 years ago

nsalerni commented 8 years ago

Hello,

I was wondering if there is a way to capture all audio as the RTC is active?

"/* * Playback and recording of voice audio, suitable for use with video. / PHAudioSessionModeMediaStreaming = 3"

The above code snippet suggests that there should be a way of recording that audio. If its already been recorded, how do I access it after the fact?

ceaglest commented 8 years ago

Hi @nsalerni.

Yes, WebRTC is recording audio and encoding it in realtime to share with other parties. However, this is done using low level Core Audio / Audio Units APIs. At this time it isn't possible to get the raw audio samples that you need, and once the samples are encoded they are discarded.

So, while I don't have a solution for you I can say that by modifying WebRTC directly you could achieve what you are looking for (writing the encoded audio, or raw samples to disk perhaps). Sorry I can't be more helpful here.