gistfile1.txt

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Timeline;
using UnityEngine.Playables;
#if UNITY_EDITOR

using UnityEditor.Experimental.Animations;

// A behaviour that is attached to a playable
public class GORecorderPlayable : PlayableBehaviour
{
    public AnimationClip clip;
    public GameObject gameObject;
    public bool isRecord;


    private GameObjectRecorder m_Recorder;
    public override void OnGraphStart(Playable playable)
    {
        if (isRecord == false || clip == null || gameObject == null)
            return;

        m_Recorder = new GameObjectRecorder(gameObject);
        m_Recorder.BindComponentsOfType<Transform>(gameObject, true);
    }
    public override void OnGraphStop(Playable playable)
    {
        if (m_Recorder == null || isRecord == false || clip == null || gameObject == null)
            return;

            m_Recorder.SaveToClip(clip);
        m_Recorder.ResetRecording();
    }

    public override void PrepareFrame(Playable playable, FrameData info) {
        if (m_Recorder == null || isRecord == false || clip == null || gameObject == null)
            return;
        m_Recorder.TakeSnapshot(info.deltaTime);
    }
}
#endif

gistfile2.txt

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Playables;

#if UNITY_EDITOR
[System.Serializable]
public class GORecorderAsset : PlayableAsset
{
    public ExposedReference<GameObject> obj;
    public AnimationClip clip;

    public bool isRecord = false;

    public override Playable CreatePlayable(PlayableGraph graph, GameObject go) {
        var playable = ScriptPlayable<GORecorderPlayable>.Create(graph);
        var gorecorder = playable.GetBehaviour();
        gorecorder.gameObject = obj.Resolve(graph.GetResolver());
        gorecorder.clip = clip;
        gorecorder.isRecord = gorecorder.gameObject != null && clip != null && isRecord;

        return playable;
	}
}
#endif