Compositor doesn't render if VSE contains strips #90357

New Issue

michael campbell · 2021-08-01T19:01:57+02:00

michael campbell commented

2021-08-01 19:01:57 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.92

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-22 22:44, hash: fafd21b14c
Worked: (newest version of Blender that worked as expected)

Short description of error
Compositor doesn't render if VSE contains strips.
In some cases user may want to have for example sound strip to play sound while compositing. This can cause only VSE to be used for rendering.

Exact steps for others to reproduce the error
Add color strip to VSE, in compositor check Use Nodes and render.

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.92 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-22 22:44, hash: `fafd21b14c` Worked: (newest version of Blender that worked as expected) **Short description of error** Compositor doesn't render if VSE contains strips. In some cases user may want to have for example sound strip to play sound while compositing. This can cause only VSE to be used for rendering. **Exact steps for others to reproduce the error** Add color strip to VSE, in compositor check Use Nodes and render.

michael campbell commented

2021-08-01 19:01:57 +02:00

Added subscriber: @3di

michael campbell commented

2021-08-01 19:05:30 +02:00

ps, I also notice the compositor and the vse get out of sync. I thought I recalled a way of bringing the VSE output into the compositor in order to apply comp effects to the vse output, and then the vse waited for the compositor to calculate before moving to the next frame. Was I dreaming this? Can't find a way to access the outputted movie in the compositor.

Richard Antalik commented

2021-08-04 02:10:08 +02:00

Added subscriber: @iss

Richard Antalik commented

2021-08-04 02:10:08 +02:00

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

Richard Antalik closed this issue

2021-08-04 02:10:08 +02:00

Richard Antalik commented

2021-08-04 02:10:08 +02:00

There are 2 issues, but no bug as far as I can see:

VSE is on "same level" as compositor, so if both have content, you have to choose one or another in Post Processing panel in Output Properties. See https://docs.blender.org/manual/en/dev/render/output/properties/post_processing.html#post-processing
Image input node is set to 1 frame, so it doesn't play whole sequence

ps, I also notice the compositor and the vse get out of sync.

If you want to be synced to audio, this needs to be enabled in Timeline in Playback popover See https://docs.blender.org/manual/en/dev/editors/timeline.html#playback-popover

I thought I recalled a way of bringing the VSE output into the compositor in order to apply comp effects to the vse output

It's possible other way around - you can add scene strip to VSE which uses compositing (or sequener).
Compositor has only View Layer input. Sequencer as input has been proposed in multiple places though.

There are 2 issues, but no bug as far as I can see: - VSE is on "same level" as compositor, so if both have content, you have to choose one or another in Post Processing panel in Output Properties. See https://docs.blender.org/manual/en/dev/render/output/properties/post_processing.html#post-processing - Image input node is set to 1 frame, so it doesn't play whole sequence > ps, I also notice the compositor and the vse get out of sync. If you want to be synced to audio, this needs to be enabled in Timeline in Playback popover See https://docs.blender.org/manual/en/dev/editors/timeline.html#playback-popover > I thought I recalled a way of bringing the VSE output into the compositor in order to apply comp effects to the vse output It's possible other way around - you can add scene strip to VSE which uses compositing (or sequener). Compositor has only View Layer input. Sequencer as input has been proposed in multiple places though.

tintwotin commented

2021-08-04 08:38:49 +02:00

Added subscriber: @tintwotin

tintwotin commented

2021-08-04 08:38:49 +02:00

The Compositor Up branch/fork by @manzanilla did include a Sequencer input node.

On the hoops users need to jump to get Compositor output imported into the Sequencer: https://devtalk.blender.org/t/the-poorly-exposed-scene-strip-properties-which-results-in-bad-ux/15415

The Compositor Up branch/fork by @manzanilla did include a Sequencer input node. On the hoops users need to jump to get Compositor output imported into the Sequencer: https://devtalk.blender.org/t/the-poorly-exposed-scene-strip-properties-which-results-in-bad-ux/15415

tintwotin commented

2021-08-04 11:14:32 +02:00

Added subscriber: @manzanilla

michael campbell commented

2021-08-04 11:46:00 +02:00

Hi @iss, oh, I must have forgot to set it back to the full sequence when I swapped the images before uploading (so they both used the same image). Making it a full sequuence or movie will still not update, but I suppose your first point of them not being able to run simultaneously is the issue. I don't suppose sinking in the timeline will help if the VSE having strips stops redraw from working in the compositor.

@tintwotin that's great thanks. Seems like quite a big feature, do you know why it didn't make it into master? I guess that branch also solves the problem of them not being able to run simultaneously?

Hi @iss, oh, I must have forgot to set it back to the full sequence when I swapped the images before uploading (so they both used the same image). Making it a full sequuence or movie will still not update, but I suppose your first point of them not being able to run simultaneously is the issue. I don't suppose sinking in the timeline will help if the VSE having strips stops redraw from working in the compositor. @tintwotin that's great thanks. Seems like quite a big feature, do you know why it didn't make it into master? I guess that branch also solves the problem of them not being able to run simultaneously?

Richard Antalik commented

2021-08-04 23:32:26 +02:00

In #90357#1201553, @3di wrote:
Hi @iss, oh, I must have forgot to set it back to the full sequence when I swapped the images before uploading (so they both used the same image). Making it a full sequuence or movie will still not update, but I suppose your first point of them not being able to run simultaneously is the issue. I don't suppose sinking in the timeline will help if the VSE having strips stops redraw from working in the compositor.

I agree, that this is confusing. I would assume that this has been decided long time ago, that it would be best to have both editors enabled for post processing, and ignore one with no content, which probably works 99% of time.

I don't see this issue open on tracker, so I will reopen as current design is flawed. Probably at least warning mesage would help you understand why this happens. Even though this was about frame handler originally so here simple warning message may not apply.

> In #90357#1201553, @3di wrote: > Hi @iss, oh, I must have forgot to set it back to the full sequence when I swapped the images before uploading (so they both used the same image). Making it a full sequuence or movie will still not update, but I suppose your first point of them not being able to run simultaneously is the issue. I don't suppose sinking in the timeline will help if the VSE having strips stops redraw from working in the compositor. I agree, that this is confusing. I would assume that this has been decided long time ago, that it would be best to have both editors enabled for post processing, and ignore one with no content, which probably works 99% of time. I don't see this issue open on tracker, so I will reopen as current design is flawed. Probably at least warning mesage would help you understand why this happens. Even though this was about frame handler originally so here simple warning message may not apply.

Richard Antalik changed title from ~~if vse has a video strip then then the compositor fails to update after render.render during playback handler.~~ to Compositor doesn't render if VSE contains strips

2021-08-04 23:40:50 +02:00

Richard Antalik commented

2021-08-04 23:40:50 +02:00

Changed status from 'Archived' to: 'Confirmed'

Richard Antalik reopened this issue

2021-08-04 23:40:50 +02:00

Philipp Oeser removed the

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Compositor doesn't render if VSE contains strips #90357