[BUG] Updating NetStream.multiCamCaptureSettings.Mode doesn't work

[RainyTunes]

Describe the bug

I found this bug and tested it in the Example Demo. Luckily I thought I had located the issue.

Just simply update the NetStream.multiCamCaptureSettings through the setter method, it doesn't work.

func switchToSideMode() {
    print("[LiveViewModel] switchToSideMode")
    stream.multiCamCaptureSettings = MultiCamCaptureSettings(
        mode: .splitView,  // set to .splitView through the setter method
        cornerRadius: 16.0,
        regionOfInterest: .init(
            origin: CGPoint(x: 16, y: 16),
            size: .init(width: 160, height: 160)
        ),
        direction: .east
    )
}

However, it works when I directly modify the library source code:

/// The default setting for the stream.
public static let `default` = MultiCamCaptureSettings(
//        mode: .pip, // this is the origin value
    mode: .splitView,  // I hardcoded the default value and it can take effect
    cornerRadius: 16.0,
    regionOfInterest: .init(
        origin: CGPoint(x: 16, y: 16),
        size: .init(width: 160, height: 160)
    ),
    direction: .east
)

Lastly, after debugging, I found where the bug came from:

/// Specifies the multi camera capture properties.
public var multiCamCaptureSettings: MultiCamCaptureSettings {
    get {
        mixer.videoIO.multiCamCaptureSettings
    }
    set {
        // it doesn't take effect
        mixer.videoIO.multiCamCaptureSettings = newValue

        // only the multiCamCaptureSettings.mode
        // from IOVideoMixer takes effect in multi-cam mode
        mixer.videoIO.videoMixer.multiCamCaptureSettings = newValue
        // (I changed the videoMixer property from private to public)
    }
}

I know the videoMixer should remain private.
However, I don't know how to solve this in a better way, or I can open a pull request.

To Reproduce

(update the Mode in NetStream.multiCamCaptureSettings through the setter method)

1. the original value is expected to be .pip
2. attach camera, public stream, connect streaming link
3. change the Mode to .splitMode through the multiCamCaptureSettings setter method
4. nothing happens although the multiCamCaptureSettings has already been modified

Expected behavior

The multi-cam Mode should be updated to .splitMode

Version

1.7.1
or
the newest main branch

Smartphone info.

iPhone 14pro

Additional context

No response

Screenshots

No response

Relevant log output

No response

[shogo4405]

Thank you.

[RainyTunes]

You are welcome @shogo4405 . Thank you for your effort.