Record profiling data split by files and with frame time markers added.

ProfilerRecorder.cs

using UnityEngine;
using UnityEngine.Profiling;
using System.IO;
using UnityEngine.SceneManagement;
using System.Text;
using System;

public class ProfilerRecorder : MonoBehaviour 
{
    public const string START_MARKER = "PROFILER_DATA_START";
    public const int FRAMES_PER_BATCH = 300;

    public int StartFrame = 0;
    public int FramesToRecord = 3000;
    public bool SplitFrames = false;

    private bool started = false;
    private int frame = 0;
    private int batch = -1;

    private long startTick;

    private void Start()
    {
        if (!Profiler.supported) enabled = false;
        sb = new StringBuilder();
        startTick = DateTime.Now.Ticks;
    }

    private StringBuilder sb;

    private void Update()
    {
        if (started)
        {
            sb.Length = 0;
            sb.Append("$$");
            sb.Append(Time.frameCount.ToString("X"));
            sb.Append(" ");
            sb.Append((DateTime.Now.Ticks - startTick).ToString("X"));
            sb.Append(" ");
            sb.Append(((int)(Time.deltaTime * TimeSpan.TicksPerSecond)).ToString("X"));
            Profiler.BeginSample(sb.ToString());
            Profiler.EndSample();

            frame++;
            if (frame >= FramesToRecord)
            {
                stopRecording();
                return;
            }
            if (SplitFrames && (frame % FRAMES_PER_BATCH == 0))
            {
                startRecording();
            }
        } 
        else if (Time.frameCount >= StartFrame)
        {
            Profiler.enabled = true;
            startRecording();
            started = true;

            Profiler.BeginSample(START_MARKER);
            Profiler.EndSample();
        }
    }

    private void startRecording()
    {
        batch++;
        Profiler.logFile = Path.Combine(Application.persistentDataPath, 
            string.Format("profiler_{0}_{1}", Application.unityVersion, batch));
        Debug.Log(Profiler.logFile);
        Profiler.enableBinaryLog = true;
    }

    private void stopRecording()
    {
        Profiler.enableBinaryLog = false;
        Profiler.logFile = null;
        Profiler.enabled = false;
        enabled = false;

        SceneManager.LoadScene("Empty");
    }
}