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NLA: New meta strip is created when the selection itself is one metastrip #99471

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opened 2022-07-05 23:20:50 +02:00 by Alexander · 9 comments
Alexander commented 2022-07-05 23:20:50 +02:00
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System Information
Operating system: Ubuntu 20.04
Graphics card: Geforce MX230

Blender Version
Broken: 3.2.1 release candidate
Worked: (newest version of Blender that worked as expected)

Short description of error
We have the opportunity to create a meta strip from ONE meta strip, and, from the point of view of the Blender, it works quite well. A meta strip is created that contains the original meta strip, and this can be repeated indefinitely

Exact steps for others to reproduce the error

  • Open .blend file
  • Selet all available strips and create meta strip
  • select this meta strip and use the meta strip creation operator on it
  • repeat last step (will add new meta strip)
    untitled.blend
    2022-07-06 00-12-08.mp4
**System Information** Operating system: Ubuntu 20.04 Graphics card: Geforce MX230 **Blender Version** Broken: 3.2.1 release candidate Worked: (newest version of Blender that worked as expected) **Short description of error** We have the opportunity to create a meta strip from ONE meta strip, and, from the point of view of the Blender, it works quite well. A meta strip is created that contains the original meta strip, and this can be repeated indefinitely **Exact steps for others to reproduce the error** - Open .blend file - Selet all available strips and create meta strip - select this meta strip and use the meta strip creation operator on it - repeat last step (will add new meta strip) [untitled.blend](https://archive.blender.org/developer/F13261588/untitled.blend) [2022-07-06 00-12-08.mp4](https://archive.blender.org/developer/F13261586/2022-07-06_00-12-08.mp4)
Alexander commented 2022-07-05 23:20:50 +02:00
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Added subscriber: @sanek2005

Added subscriber: @sanek2005
Pratik Borhade commented 2022-07-06 05:32:33 +02:00
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Added subscriber: @PratikPB2123

Added subscriber: @PratikPB2123
Pratik Borhade commented 2022-07-06 05:32:33 +02:00
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Changed status from 'Needs Triage' to: 'Needs User Info'

Changed status from 'Needs Triage' to: 'Needs User Info'
Pratik Borhade commented 2022-07-06 05:32:33 +02:00
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Hi, thanks for the report. You mean don't add meta strip on top of it if selected is already a meta strip?
Will edit the report after your confirmation.

Hi, thanks for the report. You mean don't add meta strip on top of it if selected is already a meta strip? Will edit the report after your confirmation.
Alexander commented 2022-07-06 11:54:11 +02:00
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it's easier to describe it with this picture
bug.png
let me remind you, this is all done with just ONE meta strip. In the process, no additional stripes appear, nothing is duplicated, we can just use the creation of a meta strip, having only one strip, which is clearly wrong

it's easier to describe it with this picture ![bug.png](https://archive.blender.org/developer/F13262355/bug.png) let me remind you, this is all done with just ONE meta strip. In the process, no additional stripes appear, nothing is duplicated, we can just use the creation of a meta strip, having only one strip, which is clearly wrong
Brad Clark commented 2022-07-06 16:42:40 +02:00
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Brad Clark commented 2022-07-06 16:42:40 +02:00
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Just a note, the idea and way MetaStrips work now are very limited and in the NLA roadmap that I am heading up for the Animation Module team, they need to be either improved on or replaced with more advanced organizational control/containers that can hold more than one strip across tracks and objects.

It looks like right now you are able to keep nesting them but there is no visual display of the nesting...no way to see the Meta "hierarchy"

Just a note, the idea and way MetaStrips work now are very limited and in the NLA roadmap that I am heading up for the Animation Module team, they need to be either improved on or replaced with more advanced organizational control/containers that can hold more than one strip across tracks and objects. It looks like right now you are able to keep nesting them but there is no visual display of the nesting...no way to see the Meta "hierarchy"
Pratik Borhade changed title from Strange behavior when adding a meta strip to New meta strip is created when the selection itself is one metastrip 2022-07-15 08:46:47 +02:00
Pratik Borhade commented 2022-07-15 08:47:05 +02:00
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Changed status from 'Needs User Info' to: 'Confirmed'

Changed status from 'Needs User Info' to: 'Confirmed'
Philipp Oeser removed the
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 label 2023-02-09 14:34:48 +01:00
Sybren A. Stüvel changed title from New meta strip is created when the selection itself is one metastrip to NLA: New meta strip is created when the selection itself is one metastrip 2023-05-19 15:06:55 +02:00
Sybren A. Stüvel commented 2023-05-19 15:14:01 +02:00
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let me remind you, this is all done with just ONE meta strip. In the process, no additional stripes appear, nothing is duplicated, we can just use the creation of a meta strip, having only one strip, which is clearly wrong

This isn't actually the case. Try this:

  • Select the two Action strips
  • Press Ctrl+G to create a meta strip. It'll be called 'Meta' because this is the default name for meta strips
  • Press F2 to rename it to 'Meta 1' to give it a non-default name.
  • Press Ctrl+G to create a meta strip out of that. It'll be called 'Meta' again.
  • Press F2 to rename it to 'Meta 2' to give it a non-default, unique name.
  • Press Ctrl+Alt+G to un-meta the strip. You'll see that it now 'unpacks' into 'Meta 1'.
  • Press Ctrl+Alt+G to un-meta the strip. You'll see that it now 'unpacks' into the two Action strips.

If this isn't convincing, if you just press Ctrl+G and keep the names all 'Meta', you can run this code in the Python console:

>>> C.object.animation_data.nla_tracks['NlaTrack.001'].strips['Meta'].as_pointer()
140570209553608
>>> C.object.animation_data.nla_tracks['NlaTrack.001'].strips['Meta'].strips['Meta'].as_pointer()
140570209184168

This shows that, even though the inner and outer meta strip are both called 'Meta', they are in fact different strips in memory.

I'll close this report, as this is not a bug.

> let me remind you, this is all done with just ONE meta strip. In the process, no additional stripes appear, nothing is duplicated, we can just use the creation of a meta strip, having only one strip, which is clearly wrong This isn't actually the case. Try this: - Select the two Action strips - Press Ctrl+G to create a meta strip. It'll be called 'Meta' because this is the default name for meta strips - Press F2 to rename it to 'Meta 1' to give it a non-default name. - Press Ctrl+G to create a meta strip out of that. It'll be called 'Meta' again. - Press F2 to rename it to 'Meta 2' to give it a non-default, unique name. - Press Ctrl+Alt+G to un-meta the strip. You'll see that it now 'unpacks' into 'Meta 1'. - Press Ctrl+Alt+G to un-meta the strip. You'll see that it now 'unpacks' into the two Action strips. If this isn't convincing, if you just press Ctrl+G and keep the names all 'Meta', you can run this code in the Python console: ```python >>> C.object.animation_data.nla_tracks['NlaTrack.001'].strips['Meta'].as_pointer() 140570209553608 >>> C.object.animation_data.nla_tracks['NlaTrack.001'].strips['Meta'].strips['Meta'].as_pointer() 140570209184168 ``` This shows that, even though the inner and outer meta strip are both called 'Meta', they are in fact different strips in memory. I'll close this report, as this is not a bug.
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