Missing alembic streaming assets.

Hope somebody can help,

Since 1.0.0-preview 8 of the alembic package the copy of abc files to the StreamingAssets folder on import was removed. This seems to cause a problem for a standalone player which loads scene asset bundles that reference alembic assets. Where are the alembic animations live streamed from, if not abc files in the StreamingAssets folder? The problem might stem from the fact I don't reference these scenes in the 'Build Settings | Scenes in Build' dialog since I load them from bundles. Therefore the player isn't including these abc assets?

 

I can just stick with preview-7 for now. Just wanted to know what your plans were because I have scenes that reference alembic assets but those scenes are in asset bundles (one scene per bundle). The scenes are not referenced in Build Settings | Scenes in Build. My concern is where will the alembic files be livestreamed from? Hopefully this workflow was anticipated for standalone and isn't a deal breaker?

 

Hello,
I'm having the same problem with package 1.0.3, works well in editor, and I can see a StreamingAsset copied in the build folder but the file won't play in standalone.. do you have an ETA on that ? thank you

 

Hi! I'm dealing with the same problem.

I'm using .abc files that work perfectly at the Editor. However, whenever I try to build the application, both the assets folder and the stream asset folder are not generated.

Thus, the elements that depend on these files are no longer displayed. I don't know what to do

 

Hello there,

I also have the problem, that the alembics are missing in the build. I was able to create an easy repro: https://github.com/JohannesDeml/UnityAlembicSpawningError

TL;DR: When instantiating Alembics via `GameObject.Instantiate()` the alembic files will not be included in the build.

For others searching for the problem, here is the error:

Code (CSharp):

1. failed to load alembic at C:/AlembicSpawning/Builds/AlembicSpawningProblem/AlembicSpawningProblem_Data/StreamingAssets\Assets/_Project/Meshes/Cube.abc
2. UnityEngine.DebugLogHandler:Internal_Log(LogType, LogOption, String, Object)
3. UnityEngine.DebugLogHandler:LogFormat(LogType, Object, String, Object[])
4. UnityEngine.Logger:Log(LogType, Object)
5. UnityEngine.Debug:LogError(Object)
6. UnityEngine.Formats.Alembic.Importer.AlembicStream:AbcLoad(Boolean, Boolean) (at C:\AlembicSpawning\Library\PackageCache\com.unity.formats.alembic@1.0.5\Runtime\Scripts\Importer\AlembicStream.cs:149)
7. UnityEngine.Formats.Alembic.Importer.AlembicStreamPlayer:LoadStream(Boolean) (at C:\AlembicSpawning\Library\PackageCache\com.unity.formats.alembic@1.0.5\Runtime\Scripts\Importer\AlembicStreamPlayer.cs:75)
8. UnityEngine.Formats.Alembic.Importer.AlembicStreamPlayer:OnEnable() (at C:\AlembicSpawning\Library\PackageCache\com.unity.formats.alembic@1.0.5\Runtime\Scripts\Importer\AlembicStreamPlayer.cs:137)
9. UnityEngine.Object:Internal_CloneSingleWithParent(Object, Transform, Boolean)
10. UnityEngine.Object:Instantiate(Object, Transform, Boolean) (at C:\buildslave\unity\build\Runtime\Export\Scripting\UnityEngineObject.bindings.cs:255)
11. UnityEngine.Object:Instantiate(GameObject, Transform, Boolean) (at C:\buildslave\unity\build\Runtime\Export\Scripting\UnityEngineObject.bindings.cs:291)
12. UnityEngine.Object:Instantiate(GameObject, Transform) (at C:\buildslave\unity\build\Runtime\Export\Scripting\UnityEngineObject.bindings.cs:286)
13. SpawnPrefab:InstantiatePrefab() (at C:\AlembicSpawning\Assets\_Project\Scripts\SpawnPrefab.cs:19)
14. SpawnPrefab:Start() (at C:\AlembicSpawning\Assets\_Project\Scripts\SpawnPrefab.cs:12)

Let me know if there is any other information you need to pinpoint the bug.

 

Thanks for the quick response. Hahaha, thanks for appreciating my report, I know how annoying it is to get little to no information on what the problem is or where it might come from.

Alright, that's something I can work with. I made a small little util that copies files and folders to the data folder of a build as as post build step:



Source Code: https://github.com/JohannesDeml/Uni...t/Scripts/Editor/CopyFilesPostProcessBuild.cs

The file Should be copied to an Editor Folder. After one build the Scriptable Object appears in "Assets/Editor Default Resources".

This solution is not that automatic, but quite flexible.

Just out of interest: There is no problem for other assets like .fbx to be included in the build when they are not referenced in the scene. Why does this problem occur for .abc files? Sorry If you already gave the answer to that question.

 

Makes sense. Thanks a lot for the help, hadn't had any problems with building through the post build adding fix

 

I have this error in standalone too.
Is it possible that alembics and Adressables have some issues.
I have a prefab that is adressables, once I load it and display it, I have the error that the alembic cant be stream.
The alembics file is only referenced by this prefab.

I try too add alembics files on a side map to be cooked..
Alembics file seems to show now in StreamIngAsset folder, but the loaded prefab still have the error.

 

Indeed after some test, the alembic must be in the scene to work.
Even without adressable, just a hard reference to a prefab that is instanciated doesnt work.