Pseudocode example illustrating recording multiple game cameras with NatCorder.

MultiCameraInput.cs

/* 
*   NatCorder
*   Copyright (c) 2019 Yusuf Olokoba
*/

namespace NatCorder.Inputs {

    using UnityEngine;
    using System;
    using Clocks;
    using Dispatch;

    /// <summary>
    /// Recorder input for recording multiple game cameras
    /// </summary>
    public sealed class MultiCameraInput : IDisposable {

        #region --Client API--
        /// <summary>
        /// Create a video recording input from multiple game cameras
        /// </summary>
        /// <param name="mediaRecorder">Media recorder to receive committed frames</param>
        /// <param name="clock">Clock for generating timestamps</param>
        /// <param name="cameras">Game cameras to record</param>
        public static MultiCameraInput Create (IMediaRecorder mediaRecorder, IClock clock, params Camera[] cameras) {
            if (mediaRecorder == null) {
                Debug.LogError("NatCorder Error: Cannot create camera input for null media recorder");
                return null;
            }
            if (clock == null) {
                Debug.LogError("NatCorder Error: Cannot create multi-camera recorder with no clock");
                return null;
            }
            if (cameras.Length < 2) {
                Debug.LogError("NatCorder Error: Cannot create multi-camera recorder with less than two cameras");
                return null;
            }
            return new MultiCameraInput(mediaRecorder, clock, cameras);
        }

        /// <summary>
        /// Stop recorder input and teardown resources
        /// </summary>
        public void Dispose () {
            DispatchUtility.onFrame -= OnFrame;
        }
        #endregion


        #region --Operations--
        
        private readonly IMediaRecorder mediaRecorder;
        private readonly IClock clock;
        private readonly Camera[] cameras;

        private MultiCameraRecorder (IMediaRecorder mediaRecorder, IClock clock, Camera[] cameras) {
            this.mediaRecorder = mediaRecorder;
            this.clock = clock;
            this.cameras = cameras;
            DispatchUtility.onFrame += OnFrame;
        }

        private void OnFrame () {
            var encoderFrame = mediaRecorder.AcquireFrame();
            foreach (var camera in cameras) {
                var prevTarget = camera.targetTexture;
                camera.targetTexture = encoderFrame;
                camera.Render();
                camera.targetTexture = prevTarget;
            }
            mediaRecorder.CommitFrame(encoderFrame, clock.Timestamp);
        }
        #endregion
    }
}

Updated with full script.

Hi, I am getting the error Assets\Scripts\MultiCameraInput.cs(12,11): error CS0246: The type or namespace name 'Dispatch' could not be found (are you missing a using directive or an assembly reference?).