Imported FBX Animation (coming from Unreal Engine) makes Blender switch to 25 FPS #50399

New Issue

simon · 2017-01-09T13:00:29+01:00

simon commented

2017-01-09 13:00:29 +01:00

System Information
Windows 7 / NVidia GeForce GTX 960

Blender Version
Broken: 2.87a e8299c8

I created a cube with 2 bones and a simple 200 frames-animation in 3Ds Max and exported the result as FBX. I can import this FBX into Blender and Unreal and everything is fine. BUT when I export this cube (+animation) again out of Unreal into a new FBX and import this new file into Blender, the dimensions settings are forced to 25 FPS even if I set 30 FPS before.

Exact steps for others to reproduce the error

Get the example FBX files: https://www.dropbox.com/sh/0pzy3bf6oj2nqak/AACH7VM8cnF0HOjVSNfS9Njra?dl=0
Start Blender
Set your framerate in the dimensions panel to 30 FPS
Import cube_01_anim_from3DsMax.FBX - everything is fine (this cube was exported directly from 3Ds Max)
Delete the cube and now import cube_01_anim_fromUnreal.FBX - see that the framerate is now 25 FPS and the keys don't span from 0-200 but 0-170 (this cube was created in 3Ds Max, imported as FBX into Unreal and then exported as FBX from Unreal into a new file)

Note: This bug was also reported in the Unreal Engine Forum but I'm not sure on which side the bug is created - Blender or Unreal.
https://answers.unrealengine.com/questions/544386/unreal-animation-export-makes-blender-switch-to-25.html

System Information Windows 7 / NVidia GeForce GTX 960 Blender Version Broken: 2.87a e8299c8 I created a cube with 2 bones and a simple 200 frames-animation in 3Ds Max and exported the result as FBX. I can import this FBX into Blender and Unreal and everything is fine. BUT when I export this cube (+animation) again out of Unreal into a new FBX and import this new file into Blender, the dimensions settings are forced to 25 FPS even if I set 30 FPS before. **Exact steps for others to reproduce the error** 1. Get the example FBX files: https://www.dropbox.com/sh/0pzy3bf6oj2nqak/AACH7VM8cnF0HOjVSNfS9Njra?dl=0 2. Start Blender 3. Set your framerate in the dimensions panel to 30 FPS 4. Import cube_01_anim_from3DsMax.FBX - everything is fine (this cube was exported directly from 3Ds Max) 5. Delete the cube and now import cube_01_anim_fromUnreal.FBX - see that the framerate is now 25 FPS and the keys don't span from 0-200 but 0-170 (this cube was created in 3Ds Max, imported as FBX into Unreal and then exported as FBX from Unreal into a new file) Note: This bug was also reported in the Unreal Engine Forum but I'm not sure on which side the bug is created - Blender or Unreal. https://answers.unrealengine.com/questions/544386/unreal-animation-export-makes-blender-switch-to-25.html

simon commented

2017-01-09 13:00:29 +01:00

Changed status to: 'Open'

simon commented

2017-01-09 13:00:29 +01:00

Added subscriber: @BlenderSimon

Bastien Montagne commented

2017-01-10 17:36:06 +01:00

Added subscriber: @mont29

Bastien Montagne commented

2017-01-10 17:36:06 +01:00

I’d expect that to be Unreal issue, they most likely do not write correctly the FPS settings (would be TimeMode and/or CustomFrameRate settings in GlobalSettings node).

I’d expect that to be Unreal issue, they most likely do not write correctly the FPS settings (would be `TimeMode` and/or `CustomFrameRate` settings in `GlobalSettings` node).

simon commented

2017-01-16 09:41:27 +01:00

In #50399#411651, @mont29 wrote:
I’d expect that to be Unreal issue, they most likely do not write correctly the FPS settings (would be TimeMode and/or CustomFrameRate settings in GlobalSettings node).

I thought that too but in this case 3Ds Max shouldn't be able to read the correct 30 FPS of that file which it does. :(

> In #50399#411651, @mont29 wrote: > I’d expect that to be Unreal issue, they most likely do not write correctly the FPS settings (would be `TimeMode` and/or `CustomFrameRate` settings in `GlobalSettings` node). I thought that too but in this case 3Ds Max shouldn't be able to read the correct 30 FPS of that file which it does. :(

Bastien Montagne commented

2017-01-16 10:24:26 +01:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2017-01-16 10:24:26 +01:00

Bastien Montagne self-assigned this 2017-01-16 10:24:26 +01:00

Bastien Montagne commented

2017-01-16 10:24:26 +01:00

OK, so checked the files, Unreal one has TimeMode set to 0, aka eDEFAULT_MODE, aka 'use the frame rate you want', so Blender and 3DSMax are free to do what they want here am afraid (at least official docs says nothing special about this mode).

3DS one has TimeMode set to 6, aka eFRAMES3030 (aka black & white NTSC), which we can interpret correctly.

So definitively sounds like UE4 bug to me, when exporting animation you should always set an explicit framerate! Thanks for the report anyway.

OK, so checked the files, Unreal one has `TimeMode` set to 0, aka `eDEFAULT_MODE`, aka 'use the frame rate you want', so Blender and 3DSMax are free to do what they want here am afraid (at least [official docs](http://download.autodesk.com/us/fbx/SDKdocs/FBX_SDK_Help/files/fbxsdkref/class_k_time.html#98b6d3b540247af8577ebac60b4fbe64) says nothing special about this mode). 3DS one has `TimeMode` set to 6, aka `eFRAMES3030` (aka black & white NTSC), which we can interpret correctly. So definitively sounds like UE4 bug to me, when exporting animation you should always set an explicit framerate! Thanks for the report anyway.

Julien Plard commented

2020-10-16 19:57:34 +02:00

Added subscriber: @ZalitZ

Julien Plard commented

2020-10-16 19:57:34 +02:00

In case you really need to import from UE4 with the correct framerate , I found a dirty workaround.
Export your FBX from UE4 in ASCII format. Open the file in a text editor and search for TimeMode (In the Global Settings category) :
From there, change the 0 at the end to whatever number suits your needs, see the official docs to know which number to use. Save your file.

The number corresponds to the list and starts at 0. I needed to import a 60fps fbx so I replaced the 0 with a 3.
But Blender doesn't support ASCII so you need to convert your fbx into a binary one. Luckily, Autodesk provides a free converter there. I had to open Firefox to open the link for some reason. Now install the converter and convert your modified ASCII to a binary fbx.
Import in Blender and it should work !
I really hope it will be fixed one day. I didn't try the Unreal to Blender Addon from this video from Unreal Official Youtube channel. It could work .

In case you really need to import from UE4 with the correct framerate , I found a dirty workaround. Export your FBX from UE4 in ASCII format. Open the file in a text editor and search for TimeMode (In the Global Settings category) :![pycharm64_Pb3nMJHyBq.png](https://archive.blender.org/developer/F9000382/pycharm64_Pb3nMJHyBq.png) From there, change the 0 at the end to whatever number suits your needs, see the [official docs ](http://download.autodesk.com/us/fbx/SDKdocs/FBX_SDK_Help/files/fbxsdkref/class_k_time.html#98b6d3b540247af8577ebac60b4fbe64) to know which number to use. Save your file. ![chrome_n39B1E6q2t.png](https://archive.blender.org/developer/F9000394/chrome_n39B1E6q2t.png) The number corresponds to the list and starts at 0. I needed to import a 60fps fbx so I replaced the 0 with a 3. But Blender doesn't support ASCII so you need to convert your fbx into a binary one. Luckily, Autodesk provides a free converter [there](https://www.autodesk.com/developer-network/platform-technologies/fbx-converter-archives). I had to open Firefox to open the link for some reason. Now install the converter and convert your modified ASCII to a binary fbx. Import in Blender and it should work ! I really hope it will be fixed one day. I didn't try the Unreal to Blender Addon from [this video](https://youtu.be/JwRPDCetfcc) from Unreal Official Youtube channel. It could work .

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Imported FBX Animation (coming from Unreal Engine) makes Blender switch to 25 FPS #50399