timeline and loadsceneasync hiccup

Unity Engine
,
1

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?

2

Please file a bug with your use case.

I’ve got a potential fix for that, but I’ve been looking for a repro to test against

1 Like
3

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

6943073--816272--upload_2021-3-16_22-6-52.jpg
6943073--816272--upload_2021-3-16_22-6-52.jpg2359×1142 323 KB

using UnityEngine;
using UnityEngine.Playables;
using UnityEngine.SceneManagement;

public class TimelineSceneLoadAsync : PlayableAsset
{
    #if UNITY_EDITOR
    [Multiline] public string comment;
    #endif
    public SceneReference sceneName;
    public AsyncDataPipe_SO asyncDataPipeSo;

    public override Playable CreatePlayable(PlayableGraph graph, GameObject owner)
    {
        var playable = ScriptPlayable<TimelineSceneLoadAsyncBehaviour>.Create(graph);
        var sceneLoadBehaviour = playable.GetBehaviour();
        sceneLoadBehaviour.sceneName = sceneName;
        sceneLoadBehaviour.asyncDataPipeSo = asyncDataPipeSo;
        return playable;
    }
}
public class TimelineSceneLoadAsyncBehaviour : PlayableBehaviour
{
    public string sceneName = "";
    public AsyncDataPipe_SO asyncDataPipeSo;

    public override void OnBehaviourPlay(Playable playable, FrameData info)
    {
        asyncDataPipeSo.async = SceneManager.LoadSceneAsync(sceneName, LoadSceneMode.Additive);
        asyncDataPipeSo.extraData = sceneName;
        asyncDataPipeSo.async.allowSceneActivation = false;
    }
}

also of note: activating hiccups a lot more than normal

activation script

using UnityEngine;
using UnityEngine.Playables;
using UnityEngine.SceneManagement;

public class TimelineSceneActivate : PlayableAsset
{
    #if UNITY_EDITOR
    [Multiline] public string comment;
    #endif
    public AsyncDataPipe_SO asyncDataPipeSo;
    public bool setSceneActive;
    public SceneReference sceneToUnload;

    public override Playable CreatePlayable(PlayableGraph graph, GameObject owner)
    {
        var playable = ScriptPlayable<TimelineSceneActivateBehaviour>.Create(graph);
        var sceneActivateBehaviour = playable.GetBehaviour();
        sceneActivateBehaviour.asyncDataPipeSo = asyncDataPipeSo;
        sceneActivateBehaviour.setSceneActive = setSceneActive;
        sceneActivateBehaviour.sceneToUnload = sceneToUnload;
        return playable;
    }
}
public class TimelineSceneActivateBehaviour : PlayableBehaviour
{
    public AsyncDataPipe_SO asyncDataPipeSo;
    public bool setSceneActive;
    public SceneReference sceneToUnload;
    public override void OnBehaviourPlay(Playable playable, FrameData info)
    {
        if (asyncDataPipeSo.async != null)
            asyncDataPipeSo.async.allowSceneActivation = true;
        asyncDataPipeSo.async = null;
        if (setSceneActive)
            SceneManager.SetActiveScene(SceneManager.GetSceneByPath(asyncDataPipeSo.extraData));
        //unloading
        if (!string.IsNullOrEmpty(sceneToUnload.ScenePath))
            SceneManager.UnloadSceneAsync(sceneToUnload);
    }
}

async datapipe:

using UnityEngine;

[CreateAssetMenu(menuName = "SO/Async (data pipe)")]
public class AsyncDataPipe_SO : ScriptableObject
{
    public AsyncOperation async;
    public string extraData;
}
4

bug # 1322234