VSE - Metastrip's Blend mode ignored with Effect strip bellow #87678

New Issue

filip mond · 2021-04-21T12:18:48+02:00

filip mond commented

2021-04-21 12:18:48 +02:00

System Information
Operating system: macOS-10.15.7-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 580X OpenGL Engine ATI Technologies Inc. 4.1 ATI-3.10.19

Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-04-09 21:26, hash: 0515ff70ec
Worked: (newest version of Blender that worked as expected)

Short description of error
Metastrip's Blend mode ignored with Effect strip bellow, but it is working with a Strip.

Exact steps for others to reproduce the error
I even didn't know it is possible to move Effect strip bellow a Strip related to. This technique was described as only one way to create an outline to a Text strip.

add Text Strip
add Glow effect strip to it
move Glow strip bellow Text strip

by a simple tweaking + one Color Balance modifier you can contrast and recolour the Glow strip into an illusion of outline around a text.
Detailed here

It perfectly works for single strip with blend mode Alpha Over as expected, but since Text strip is inside Metastrip blend mode is ignored or better say - Text strip is not visible even all setup is for both strips the same.

Text Strip

Metastrip

test_Text_Glow_Metastrip.blend

**System Information** Operating system: macOS-10.15.7-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon Pro 580X OpenGL Engine ATI Technologies Inc. 4.1 ATI-3.10.19 **Blender Version** Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-04-09 21:26, hash: `0515ff70ec` Worked: (newest version of Blender that worked as expected) **Short description of error** Metastrip's Blend mode ignored with Effect strip bellow, but it is working with a Strip. **Exact steps for others to reproduce the error** I even didn't know it is possible to move Effect strip bellow a Strip related to. This technique was described as only one way to create an outline to a Text strip. - add Text Strip - add Glow effect strip to it - move Glow strip bellow Text strip by a simple tweaking + one Color Balance modifier you can contrast and recolour the Glow strip into an illusion of outline around a text. [Detailed here ](https://blender.stackexchange.com/a/214224/2214) It perfectly works for single strip with blend mode Alpha Over as expected, but since Text strip is inside Metastrip blend mode is ignored or better say - Text strip is not visible even all setup is for both strips the same. Text Strip ![Screenshot 2021-04-21 at 12.00.32.png](https://archive.blender.org/developer/F10031158/Screenshot_2021-04-21_at_12.00.32.png) Metastrip ![Screenshot 2021-04-21 at 12.00.50.png](https://archive.blender.org/developer/F10031161/Screenshot_2021-04-21_at_12.00.50.png) [test_Text_Glow_Metastrip.blend](https://archive.blender.org/developer/F10031163/test_Text_Glow_Metastrip.blend)

filip mond commented

2021-04-21 12:18:48 +02:00

Added subscriber: @FilipMond

Germano Cavalcante commented

2021-04-22 16:42:41 +02:00

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

Germano Cavalcante commented

2021-04-22 16:42:41 +02:00

Added subscriber: @mano-wii

Richard Antalik commented

2021-04-23 09:00:42 +02:00

Added subscriber: @iss

Richard Antalik commented

2021-04-23 09:00:42 +02:00

There is piece of code that was supposed to not render base strip when it has effects. this was written quite poorly though.

For example when you use for example transform effect on some strip, you don't expect to see original image. At this point I would consider that to be established convention, so I don't think I would like to change that. However I think it could be said, that when effect of source strip is below source strip, user would expect effect to be blended with source. I can change behavior for 3.0 release, because this change would affect existing files.

For 2.93 I could make bugfix that would not render text strip as well.

As workaround you can use speed control strip above meta strip, which will take no time to do additional processing.

There is piece of code that was supposed to not render base strip when it has effects. this was written quite poorly though. For example when you use for example transform effect on some strip, you don't expect to see original image. At this point I would consider that to be established convention, so I don't think I would like to change that. However I think it could be said, that when effect of source strip is below source strip, user would expect effect to be blended with source. I can change behavior for 3.0 release, because this change would affect existing files. For 2.93 I could make bugfix that would not render text strip as well. As workaround you can use speed control strip above meta strip, which will take no time to do additional processing.

Richard Antalik commented

2021-04-23 09:44:17 +02:00

Looked at fix for 2.93 and there is no clean way to fix this case that would work reliably, so I think I will pass on that and focus on fix for 3.0

Sergey Sharybin commented

2021-05-03 15:25:43 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2021-05-03 15:25:43 +02:00

@iss, Correct me if I'm wrong, it does seem like this is not a recent regression. If so, addressing it for the 3.0 sounds good to me.

Just making sure we don't introduce known regressions in the LTS release (known old limitations are fine though :)

@iss, Correct me if I'm wrong, it does seem like this is not a recent regression. If so, addressing it for the 3.0 sounds good to me. Just making sure we don't introduce known regressions in the LTS release (known old limitations are fine though :)

Richard Antalik commented

2021-05-04 01:33:23 +02:00

In #87678#1155328, @Sergey wrote:
@iss, Correct me if I'm wrong, it does seem like this is not a recent regression. If so, addressing it for the 3.0 sounds good to me.

Just making sure we don't introduce known regressions in the LTS release (known old limitations are fine though :)

This isn't recent regression and I don't intend fixing this for 2.93

> In #87678#1155328, @Sergey wrote: > @iss, Correct me if I'm wrong, it does seem like this is not a recent regression. If so, addressing it for the 3.0 sounds good to me. > > Just making sure we don't introduce known regressions in the LTS release (known old limitations are fine though :) This isn't recent regression and I don't intend fixing this for 2.93

blender-admin commented

2021-05-19 22:59:33 +02:00

This issue was referenced by 0b7744f4da

This issue was referenced by 0b7744f4da666bccf2005ad0d0e77c5ddc73bfd5

Richard Antalik commented

2021-05-19 23:16:41 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Richard Antalik closed this issue

2021-05-19 23:16:41 +02:00

Richard Antalik self-assigned this 2021-05-19 23:16:41 +02:00

Richard Antalik commented

2021-05-19 23:16:41 +02:00

Issue should be resolved by 0b7744f4da

Now any strip that is placed above it's effect will be rendered (unless they are muted and similar cases).
There is chance that this change won't be received well, and I will have to revert this decision, because there are hundreds of files that may be possibly broken by this change. Hopefully this won't happen though.

Issue should be resolved by 0b7744f4da Now any strip that is placed above it's effect will be rendered (unless they are muted and similar cases). There is chance that this change won't be received well, and I will have to revert this decision, because there are hundreds of files that may be possibly broken by this change. Hopefully this won't happen though.

filip mond commented

2021-05-20 11:53:02 +02:00

Solved :) Great ... Thank you

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VSE - Metastrip's Blend mode ignored with Effect strip bellow #87678