Record raw video without VideoEffect (but keep effects for preview & live)

[noho501]

Hi,
I want to record the raw camera video (no VideoEffect), while still showing effects in preview and live stream.

Example setup:

func startRecorder() {
    let url = URL(fileURLWithPath: NSTemporaryDirectory())
        .appendingPathComponent("recorder.mp4")
    Task {
        try? await recorder.startRecording(url, settings: [
            AVMediaType.audio: [AVFormatIDKey: Int(kAudioFormatMPEG4AAC)],
            AVMediaType.video: [AVVideoCodecKey: AVVideoCodecType.h264],
        ])
    }
}

final class MonochromeEffect: VideoEffect {
    let filter = CIFilter(name: "CIColorMonochrome")!
    func execute(_ image: CIImage) -> CIImage {
        filter.setValue(image, forKey: "inputImage")
        filter.setValue(CIColor(red: 0.75, green: 0.75, blue: 0.75), forKey: "inputColor")
        filter.setValue(1.0, forKey: "inputIntensity")
        return filter.outputImage!
    }
}

Currently, the recorder always captures the processed frame (after VideoEffect).
But in some cases (e.g. sports replay, goal highlight), I need the original camera feed saved.

It would be great to have an option like:

recorder.useRawCameraOutput = true

Is there any way to record raw (no effect) video, or could this feature be added?

Thanks,

[shogo4405]

The same functionality has already been implemented.

mixer = MediaMixer()

// Assuming that the source is attached as follows:
try? await mixer.attachVideo(front, track: 0)
try? await mixer.attachVideo(back, track: 1)

recorder = StreamRecorder()
// - Specifying 0 selects the front camera
// - Specifying 1 selects the back camera
// - Specifying UInt8.max uses the output from VideoEffect
await recorder.selectTrack(1, mediaType: .video)

mixer.addOutput(recorder)

[noho501]

That’s wonderful. Thank you very much for your help.