How can I record mecanim animations with value changes on animator.speed?

Questions & Answers
1

I need to record animations on mecanim and want also record the animator.speed changes to playback slow motion moments as well.

2

The animator.speed value is not supported for recording in unity, however you can workaround this by using a separated Animator to record the speed values in a float parameter and then playback both animators
and make a correction on the playbackTime by using the recorded value on the speed parameter from the other animator.

Like this :

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class RecordingManager : MonoBehaviour {
	
	public Animator mainAnimator;
	public Animator animatorSpeedRecorder;
	public Button playBackButton;
	public Button recordButton;
	public Text speedLabel;
	public Slider speedSlider;
	private bool isPlayingBack = false;
	private bool isRecording = false;

	void Start () 
	{
		animatorSpeedRecorder.SetFloat ("speed", 1.0f);
		speedSlider.value = 1.0f;
		speedLabel.text  = "Speed: "+mainAnimator.speed +"x";
	}

	void Update () 
	{
		if(isPlayingBack)
		{
			float time = animatorSpeedRecorder.playbackTime + animatorSpeedRecorder.GetFloat ("speed") * Time.deltaTime;

			while(time > animatorSpeedRecorder.recorderStopTime)
				time -= (animatorSpeedRecorder.recorderStopTime - animatorSpeedRecorder.recorderStartTime);
			
			animatorSpeedRecorder.playbackTime = time;
			mainAnimator.playbackTime = time;
		}
	}

	public void OnSpeedValueChanged()
	{
		if (mainAnimator && animatorSpeedRecorder) 
		{
			mainAnimator.speed = speedSlider.value;
			animatorSpeedRecorder.speed = speedSlider.value;
			animatorSpeedRecorder.SetFloat ("speed", mainAnimator.speed);
			speedLabel.text  = "Speed: "+mainAnimator.speed +"x";
		}
	}

	public void OnClickRecordingButton()
	{
		if (isRecording) 
		{
			StopRecording ();
		} else 
		{  
			StartRecording ();
		}
	}

	public void StartRecording ()
	{
		if (mainAnimator && animatorSpeedRecorder) 
		{
			isRecording = true;
			playBackButton.enabled = false;
			mainAnimator.StartRecording (-1);
			animatorSpeedRecorder.StartRecording (-1);
			recordButton.image.color = Color.red;
			playBackButton.image.color = Color.gray;
		}
	}
	
	public void StopRecording ()
	{
		if (mainAnimator && animatorSpeedRecorder) 
		{
			isRecording = false;
			playBackButton.enabled = true;
			mainAnimator.StopRecording();
			animatorSpeedRecorder.StopRecording();
			recordButton.image.color = Color.white;
			playBackButton.image.color = Color.white;
		}
	}

	public void OnClickPlayBack()
	{
		if (isPlayingBack) 
		{
			StopPlayback ();
		} else 
		{
			StartPlayback ();
		}
	}

	public void StopPlayback ()
	{
		if (mainAnimator && animatorSpeedRecorder && isPlayingBack) 
		{
			isPlayingBack = false;
			recordButton.enabled = true;
			mainAnimator.StopPlayback ();
			animatorSpeedRecorder.StopPlayback ();
			recordButton.image.color = Color.white;
			playBackButton.image.color = Color.white;
		}
	}

	public void StartPlayback (){

		if (mainAnimator.recorderStopTime <= 0)
			return;

		if (mainAnimator && animatorSpeedRecorder && !isPlayingBack ) 
		{
			mainAnimator.Rebind();
			animatorSpeedRecorder.Rebind();
			recordButton.enabled = false;
			mainAnimator.StartPlayback ();
			animatorSpeedRecorder.StartPlayback ();
			mainAnimator.playbackTime = mainAnimator.recorderStartTime;
			isPlayingBack = true;
			recordButton.image.color = Color.gray;
			playBackButton.image.color = Color.green;
		}
	}
}

Here is the example project: RecordingExample.7z

https://oc.unity3d.com/public.php?service=files&t=05eb07a5c9862dab9315f0d2df35cd84