Timeline在某些安卓真机通过PlayableDirector组件获取不到某些track的问题

Question

我在场景里面动态加载一个Timeline的prefab，然后通过PlayableDirector组件获取CinemachineTrack来绑定场景的摄像机，通过以下两个方式遍历获取都获取不到： 1、TimelineAsset asset = playableDirector.playableAsset as TimelineAsset; foreach (TrackAsset track in asset.GetOutputTracks()) { Debug.Log("TrackAsset: " + track.name); GroupTrack group = track.GetGroup(); if (group != null) { Debug.Log("GroupTrack: " + group.name); if (group.name.StartsWith("Camera") == true) { foreach (PlayableBinding output in track.outputs) { if (output.sourceObject != null) { playableDirector.SetGenericBinding(output.sourceObject, Camera.main.gameObject); Debug.Log("Bind main camera success!!!"); } } } } } 2、foreach (PlayableBinding output in playableDirector.playableAsset.outputs) { Debug.Log("PlayableBinding: " + output.streamName); if (output.streamName.StartsWith("Cinemachine Track") == true) { if (output.sourceObject != null) { playableDirector.SetGenericBinding(output.sourceObject, Camera.main.gameObject); Debug.Log("Bind main camera success!!!"); } } } 只有在某些安卓真机上才会出现，编辑器不会出现，请问有人遇到过类似的问题吗？

补充一下，我用的是Unity2017 4.34