Question timeline and loadsceneasync hiccup

loadsceneasync causes a hiccup, this hiccup throws the timeline out of sync with audio, the timeline is set to DSP clock, what's the solution?

 

alright I filled that bug
here is the repro data in picture

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.Playables;
3. using UnityEngine.SceneManagement;
4.  
5. public class TimelineSceneLoadAsync : PlayableAsset
6. {
7.     #if UNITY_EDITOR
8.     [Multiline] public string comment;
9.     #endif
10.     public SceneReference sceneName;
11.     public AsyncDataPipe_SO asyncDataPipeSo;
12.  
13.     public override Playable CreatePlayable(PlayableGraph graph, GameObject owner)
14.     {
15.         var playable = ScriptPlayable<TimelineSceneLoadAsyncBehaviour>.Create(graph);
16.         var sceneLoadBehaviour = playable.GetBehaviour();
17.         sceneLoadBehaviour.sceneName = sceneName;
18.         sceneLoadBehaviour.asyncDataPipeSo = asyncDataPipeSo;
19.         return playable;
20.     }
21. }
22. public class TimelineSceneLoadAsyncBehaviour : PlayableBehaviour
23. {
24.     public string sceneName = "";
25.     public AsyncDataPipe_SO asyncDataPipeSo;
26.  
27.     public override void OnBehaviourPlay(Playable playable, FrameData info)
28.     {
29.         asyncDataPipeSo.async = SceneManager.LoadSceneAsync(sceneName, LoadSceneMode.Additive);
30.         asyncDataPipeSo.extraData = sceneName;
31.         asyncDataPipeSo.async.allowSceneActivation = false;
32.     }
33. }

also of note: activating hiccups a lot more than normal

activation script

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.Playables;
3. using UnityEngine.SceneManagement;
4.  
5. public class TimelineSceneActivate : PlayableAsset
6. {
7.     #if UNITY_EDITOR
8.     [Multiline] public string comment;
9.     #endif
10.     public AsyncDataPipe_SO asyncDataPipeSo;
11.     public bool setSceneActive;
12.     public SceneReference sceneToUnload;
13.  
14.     public override Playable CreatePlayable(PlayableGraph graph, GameObject owner)
15.     {
16.         var playable = ScriptPlayable<TimelineSceneActivateBehaviour>.Create(graph);
17.         var sceneActivateBehaviour = playable.GetBehaviour();
18.         sceneActivateBehaviour.asyncDataPipeSo = asyncDataPipeSo;
19.         sceneActivateBehaviour.setSceneActive = setSceneActive;
20.         sceneActivateBehaviour.sceneToUnload = sceneToUnload;
21.         return playable;
22.     }
23. }
24. public class TimelineSceneActivateBehaviour : PlayableBehaviour
25. {
26.     public AsyncDataPipe_SO asyncDataPipeSo;
27.     public bool setSceneActive;
28.     public SceneReference sceneToUnload;
29.     public override void OnBehaviourPlay(Playable playable, FrameData info)
30.     {
31.         if (asyncDataPipeSo.async != null)
32.             asyncDataPipeSo.async.allowSceneActivation = true;
33.         asyncDataPipeSo.async = null;
34.         if (setSceneActive)
35.             SceneManager.SetActiveScene(SceneManager.GetSceneByPath(asyncDataPipeSo.extraData));
36.         //unloading
37.         if (!string.IsNullOrEmpty(sceneToUnload.ScenePath))
38.             SceneManager.UnloadSceneAsync(sceneToUnload);
39.     }
40. }

async datapipe:

Code (CSharp):

1. using UnityEngine;
2.  
3. [CreateAssetMenu(menuName = "SO/Async (data pipe)")]
4. public class AsyncDataPipe_SO : ScriptableObject
5. {
6.     public AsyncOperation async;
7.     public string extraData;
8. }

 

bug # 1322234