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Asked: 2026-05-26T19:42:41+00:00

I have been trying to do this for a few days now using AVFoundation

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I have been trying to do this for a few days now using AVFoundation as well as trying to use MPMoviePlayerViewController. The closest I can get is allowing one to play at a time. I would like to think that this is possible because of Facetime. However, I know this is a little different because there is no separate video file.

Any ideas would help, and thanks.

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1 Answer

  1. Editorial Team

    I’m not sure where this is documented, but to get AVCaptureVideoPreviewLayer and MPMoviePlayerViewController to play together at the same time you need to set a mixable audio session category first.

    Here’s one way to do that: 

    AVAudioSession* session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayback error:nil];
UInt32 mixable = 1;
AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(mixable), &mixable);
[session setActive:YES error:nil];

    See the Audio Session Programming Guide and Audio Session Cookbook for more info.

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