USD animation exported from Audio2face can't play after opening saved scene #94396

New Issue

Mariano Basti · 2021-12-26T19:11:09+01:00

Mariano Basti commented

2021-12-26 19:11:09 +01:00

System Information
Operating system: Windows 10
Graphics card: Nvidia RTX2070S
Processor: AMD Ryzen 5 3600XT

Blender Version
Broken: version:3.0 stable, commit date: 2021-12-02 andversion:3.1 alpha, commit date: 2021-12-23

Short description of error
Importing an USD animation and saving the scene, when loading that scene again the "MeshSequenceCache" throws an error stating "Could not create reader for file".
Also, on the same opened scene when trying to reimport the file, the error "USD Import: unable to open stage to read XXX" appears at the bottom.

Exact steps for others to reproduce the error
• New scene
• Import attached .usd file
• Save scene and quit Blender
• Load scene

{F12776835, size=full}

file.usd

Thanks and happy holidays!

**System Information** Operating system: Windows 10 Graphics card: Nvidia RTX2070S Processor: AMD Ryzen 5 3600XT **Blender Version** Broken: version:3.0 stable, commit date: 2021-12-02 andversion:3.1 alpha, commit date: 2021-12-23 **Short description of error** Importing an USD animation and saving the scene, when loading that scene again the "MeshSequenceCache" throws an error stating "Could not create reader for file". Also, on the same opened scene when trying to reimport the file, the error "USD Import: unable to open stage to read XXX" appears at the bottom. **Exact steps for others to reproduce the error** • New scene • Import attached .usd file • Save scene and quit Blender • Load scene {[F12776835](https://archive.blender.org/developer/F12776835/error.png), size=full} [file.usd](https://archive.blender.org/developer/F12776831/file.usd) Thanks and happy holidays!

Mariano Basti commented

2021-12-26 19:11:09 +01:00

Added subscriber: @marianobasti

Philipp Oeser commented

2022-01-13 16:43:13 +01:00

Added subscribers: @dr.sybren, @lichtwerk

Philipp Oeser commented

2022-01-13 16:43:13 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Philipp Oeser commented

2022-01-13 16:43:13 +01:00

Can confirm.

I am getting these messages [which sounds suspicious @dr.sybren - is there something wrong with the lib?] opening the file again:

Coding Error (secondary thread): in _OpenLayerAndUnlockRegistry at line 3104 of /home/sybren/buildbot-builder/linux_glibc217_x86_64_cmake/build_deps/deps/build/usd/src/external_usd/pxr/usd/sdf/layer.cpp -- Cannot determine file format for @/T94396/file.usd:SDF_FORMAT_ARGS:target=usd@
Runtime Error (secondary thread): in Open at line 853 of /home/sybren/buildbot-builder/linux_glibc217_x86_64_cmake/build_deps/deps/build/usd/src/external_usd/pxr/usd/usd/stage.cpp -- Failed to open layer @/T94396/file.usd@

Can confirm. I am getting these messages [which sounds suspicious @dr.sybren - is there something wrong with the lib?] opening the file again: ``` Coding Error (secondary thread): in _OpenLayerAndUnlockRegistry at line 3104 of /home/sybren/buildbot-builder/linux_glibc217_x86_64_cmake/build_deps/deps/build/usd/src/external_usd/pxr/usd/sdf/layer.cpp -- Cannot determine file format for @/T94396/file.usd:SDF_FORMAT_ARGS:target=usd@ Runtime Error (secondary thread): in Open at line 853 of /home/sybren/buildbot-builder/linux_glibc217_x86_64_cmake/build_deps/deps/build/usd/src/external_usd/pxr/usd/usd/stage.cpp -- Failed to open layer @/T94396/file.usd@ ```

Sybren A. Stüvel commented

2022-01-13 17:27:57 +01:00

Added subscriber: @makowalski

Sybren A. Stüvel commented

2022-01-13 17:27:57 +01:00

It's the call to pxr::UsdStageRefPtr stage = pxr::UsdStage::Open(filename); in USD_create_handle() that causes this error.

@makowalski could you take a look at this?

It's the call to `pxr::UsdStageRefPtr stage = pxr::UsdStage::Open(filename);` in `USD_create_handle()` that causes this error. @makowalski could you take a look at this?

Michael Kowalski commented

2022-01-13 18:02:47 +01:00

@lichtwerk @dr.sybren @marianobasti I have a fix for this (one line of code) and will follow up soon with the details.

Michael Kowalski commented

2022-01-13 18:14:41 +01:00

@dr.sybren The fix is to call ensure_usd_plugin_path_registered() at the beginning of USD_create_handle(), to ensure the USD file format plugins are loaded when the USDs are opened for the modifiers/constraints. Sybren, what is the best way to submit this fix? Given that it's only one line, should I still create a patch for this so others can test and review?

@dr.sybren The fix is to call `ensure_usd_plugin_path_registered()` at the beginning of `USD_create_handle()`, to ensure the USD file format plugins are loaded when the USDs are opened for the modifiers/constraints. Sybren, what is the best way to submit this fix? Given that it's only one line, should I still create a patch for this so others can test and review?

Robert Rioux commented

2022-01-25 17:46:17 +01:00

Added subscriber: @Funnybob

Robert Rioux commented

2022-01-25 17:46:17 +01:00

I'm having the same issue. Here's the thing: On my computer, I can read the file perfectly. On my colleague's, he gets the message. We are both using the same version of Blender. We can't continue our work at this point. A quick release of the patch would be greatly appreciated. Cheers.

Mariano Basti commented

2022-01-25 17:51:33 +01:00

In #94396#1294720, @Funnybob wrote:
I'm having the same issue. Here's the thing: On my computer, I can read the file perfectly. On my colleague's, he gets the message. We are both using the same version of Blender. We can't continue our work at this point. A quick release of the patch would be greatly appreciated. Cheers.

A workaround I found for the time being is exporting the animation to collada (.abc) once loaded into blender and importing it.

> In #94396#1294720, @Funnybob wrote: > I'm having the same issue. Here's the thing: On my computer, I can read the file perfectly. On my colleague's, he gets the message. We are both using the same version of Blender. We can't continue our work at this point. A quick release of the patch would be greatly appreciated. Cheers. A workaround I found for the time being is exporting the animation to collada (.abc) once loaded into blender and importing it.

Michael Kowalski commented

2022-01-25 17:53:25 +01:00

Here is another workaround: when you first launch Blender, before opening the .blend file in question, do a simple export to USD (for example, save the default cube to a throw-away USD file somewhere). This will force the USD plugins to load. You should then be able to load the blend file with the mesh sequence cache modifiers with no errors. Please let me know if this does not work for you.

@dr.sybren, please let me know how you'd like me to handle the release of this fix (or whether someone else can also do this, given the simplicity of the change).

Here is another workaround: when you first launch Blender, before opening the .blend file in question, do a simple export to USD (for example, save the default cube to a throw-away USD file somewhere). This will force the USD plugins to load. You should then be able to load the blend file with the mesh sequence cache modifiers with no errors. Please let me know if this does not work for you. @dr.sybren, please let me know how you'd like me to handle the release of this fix (or whether someone else can also do this, given the simplicity of the change).

Robert Rioux commented

2022-01-25 19:03:38 +01:00

@makowalski Yep! That worked! Thanks! (It's fun, 30 minutes ago I was listening to you on one of the omniverse clips. Small world!

Michael Kowalski commented

2022-02-09 20:27:49 +01:00

My apologies. This simple fix has been delayed unnecessarily due to miscommunication on my part. Hopefully we can submit this very soon once revision [D14066](https://archive.blender.org/developer/D14066) has been accepted.

My apologies. This simple fix has been delayed unnecessarily due to miscommunication on my part. Hopefully we can submit this very soon once revision `[D14066](https://archive.blender.org/developer/D14066)` has been accepted.

blender-admin commented

2022-02-25 15:27:10 +01:00

This issue was referenced by 0a6a74bac4

This issue was referenced by 0a6a74bac41558af0ee6d3031d923470d32e767e

Michael Kowalski commented

2022-02-25 15:28:18 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Michael Kowalski closed this issue

2022-02-25 15:28:18 +01:00

Michael Kowalski self-assigned this 2022-02-25 15:28:18 +01:00

Michael Kowalski commented

2022-02-28 02:11:25 +01:00