https://blog.csdn.net/qq_36292069/article/details/88601302

using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEditor;
using UnityEngine;
using UnityEngine.Timeline;

public class FacialExpressionEditor : EditorWindow
{
    
    
    
    [MenuItem("Tools/ConvertSelectMouth")]
    static void ConvertSelectMouth()
    {
    
    
        CloneSelectAnimationClip();
    }

    private static void ConvertMouthAnimation()
    {
    
    
        DirectoryInfo dir = Directory.CreateDirectory("Assets/Animation");
        FileInfo[] files = dir.GetFiles("*.anim");
        for(int i=0;i<files.Length;++i)
        {
    
    
            string path = files[i].FullName;
            int index = path.IndexOf("Assets");
            path = path.Substring(index);
            AnimationClip clip = AssetDatabase.LoadAssetAtPath(path, typeof(AnimationClip)) as AnimationClip;
            CloneOneAnimationClip(clip);
        }
        AssetDatabase.Refresh();
    }

    private static void CloneSelectAnimationClip()
    {
    
    
        AnimationClip clip = Selection.activeObject as AnimationClip;
        CloneOneAnimationClip(clip);
        AssetDatabase.Refresh();
    }

    private static void CloneOneAnimationClip(AnimationClip source)
    {
    
    
        if (source == null) return;
        EditorCurveBinding[] bindings = AnimationUtility.GetCurveBindings(source);
        AnimationClip destClip = new AnimationClip();
        destClip.legacy = false;
        for (int i = 0; i < bindings.Length; i++)
        {
    
    
            EditorCurveBinding sourceBinding = bindings[i];
            AnimationCurve sourceCurve = AnimationUtility.GetEditorCurve(source, sourceBinding);
            AnimationCurve destCurve = new AnimationCurve();
            Keyframe[] keyframes = sourceCurve.keys;
            for (int j = 0; j < keyframes.Length; j++)
            {
    
    
                Keyframe kf = keyframes[j];
                Keyframe keyframe = new Keyframe(kf.time, kf.value * 0.01f, kf.inTangent, kf.outTangent, kf.inWeight, kf.outWeight);
                keyframe.weightedMode = kf.weightedMode;
                destCurve.AddKey(keyframe);
            }
            destClip.SetCurve(sourceBinding.path, typeof(FacialExpressionCurve), sourceBinding.propertyName, destCurve);
        }
        AssetDatabase.CreateAsset(destClip, "Assets/BundleRes/Animation/FacialMouth/" + source.name + ".anim");
    }
}