把Unity Timeline中使用activation track的text组件中的文字解出来。统一输出到一个外部text file

SubtitleExtractor.cs

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

/// <summary>
/// Extract text in timeline(activation track)
/// and export to external text file
/// </summary>

public class SubtitleExtractor : Editor
{
    // [SerializeField]
    // PlayableDirector _pd;

    [MenuItem("Tools/Extract subtitles")]
    public static void GenerateSubtitles()
    {
        // TimelineAsset ta = _pd.playableAsset as TimelineAsset;
        PlayableDirector director = Selection.activeGameObject.GetComponent<PlayableDirector>();

        if(director == null)
        {
            EditorUtility.DisplayDialog(null, "curr selection is not a timeline playableDirector", "ok", "cancel");
            return;
        }

        var obj = new SerializedObject(director);
        var bindings = obj.FindProperty("m_SceneBindings");
        
        List<Subtitle> s_list = new List<Subtitle>();
        for(int i=0;i<bindings.arraySize;i++)
        {
            var binding = bindings.GetArrayElementAtIndex(i);
            var trackProp = binding.FindPropertyRelative("key");
            var sceneObjProp = binding.FindPropertyRelative("value");
            var track = trackProp.objectReferenceValue;
            var sceneObj = sceneObjProp.objectReferenceValue;
 
            // Debug.LogFormat("Binding {0} {1}", track != null ? track.name : "Null", sceneObj != null ? sceneObj.name : "Null");
            if(sceneObj is GameObject)
            {
                GameObject g = sceneObj as GameObject;
                Text t = g.GetComponent<Text>();
                if(t == null || t.enabled == false)
                    continue;

                if(track is ActivationTrack)
                {
                    ActivationTrack at = track as ActivationTrack;
                    s_list.Add(new Subtitle(at.start, at.end, t.text));
                }

                // Debug.Log((sceneObj as GameObject).name);
            }
        }

        s_list.Sort();

        StreamWriter sw = File.CreateText("Assets/subtitles.txt");

        for(int i=0;i<s_list.Count;i++)
        {
            // s_all += s_list[i].Print();
            // Debug.Log(s_list[i].Print());
            sw.WriteLine(s_list[i].Print());
        }

        sw.Close();

        AssetDatabase.Refresh();
    }
}

public class Subtitle : IComparer<Subtitle>, IComparable<Subtitle>
{
    public double Start;
    public double End;
    public string Text;

    public Subtitle(double start, double end, string text)
    {
        this.Text = text;
        this.Start = start;
        this.End = end;
    }

    public string Print()
    {
        return string.Format("{0:F2} - {1:F2}, {2}", this.Start, this.End, this.Text);
    }

	public int Compare(Subtitle x, Subtitle y)
	{
		if(x.Start < y.Start)
			return -1;

		if(x.Start > y.Start)
			return 1;

		return 0;
	}

	public int CompareTo(Subtitle other)
	{
        if(this.Start < other.Start)
            return -1;

        if(this.Start > other.Start)
            return 1;

        return 0;
	}
}