Rendering an animation skip some frames for compositing with 4.1 #118555

New Issue

Yann Kervran · 2024-02-21T12:16:10+01:00

Yann Kervran commented

2024-02-21 12:16:10 +01:00

System Information
Operating system: Linux-6.5.0-5-amd64-x86_64-with-glibc2.37 64 Bits, X11 UI
Graphics card: NVIDIA GeForce GTX 980 Ti/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 525.147.05

Blender Version
Broken: version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-02-12 20:16, hash: d45175c919f3 and later
Worked: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: 9be62e85b7, type: release

Short description of error
When rendering the Animation, some of the frames are not rendered with the compositing. I have made several tests, and it is not always the same frames.

Blender 4.0 renders fine and later versions of 4.1 I have tried have the same error.

I have tried to replicate the bug with simpler setups, but it never occurred with my tests. So I enclose a copy of the involved files.

Exact steps for others to reproduce the error

Download and unzip attached .zip file
Open the rig_mechanical.blend file
Render animation

Note that some of the resulting images do not have compositing applied.

**System Information** Operating system: Linux-6.5.0-5-amd64-x86_64-with-glibc2.37 64 Bits, X11 UI Graphics card: NVIDIA GeForce GTX 980 Ti/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 525.147.05 **Blender Version** Broken: version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-02-12 20:16, hash: `d45175c919f3` and later Worked: version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: 9be62e85b727, type: release **Short description of error** When rendering the Animation, some of the frames are not rendered with the compositing. I have made several tests, and it is not always the same frames. Blender 4.0 renders fine and later versions of 4.1 I have tried have the same error. I have tried to replicate the bug with simpler setups, but it never occurred with my tests. So I enclose a copy of the involved files. ![](attachments/29fe0d95-2282-4144-9f9b-99028e9aba4a) **Exact steps for others to reproduce the error** - Download and unzip attached .zip file - Open the `rig_mechanical.blend` file - Render animation Note that some of the resulting images do not have compositing applied.

compositing_bug.zip

9.5 MiB

Yann Kervran added the

labels 2024-02-21 12:16:11 +01:00

Germano Cavalcante commented

2024-02-21 20:56:30 +01:00

Hi @YannK,

Thank you for the bug report. Could you please clarify what you mean by "not rendered with the compositing"?

I have tested the "rig_mechanical.blend" file you provided and rendered the animation. In the result, I could see all frames as 60 PNG images with the "MRM_banner.png" added to the image by the compositor.

To further investigate the issue, could you try using the latest daily build of Blender? You can download it from this link: https://builder.blender.org/download/

Hi @YannK, Thank you for the bug report. Could you please clarify what you mean by "not rendered with the compositing"? I have tested the "rig_mechanical.blend" file you provided and rendered the animation. In the result, I could see all frames as 60 PNG images with the "MRM_banner.png" added to the image by the compositor. To further investigate the issue, could you try using the latest daily build of Blender? You can download it from this link: https://builder.blender.org/download/

Germano Cavalcante added

Status

Needs Information from User

and removed

Status

Needs Triage

labels 2024-02-21 20:56:39 +01:00

Yann Kervran commented

2024-02-21 23:33:38 +01:00

Hi, thanks for your answer,

sorry for the lack of precision. I meant that some renders don’t include the compositing: look at these files : mech_rig_1_0002.png, mech_rig_1_0012.png, mech_rig_1_0013.png or mech_rig_1_0014.png are the viewlayer only and not the banner with the alpha over:

Which version do you want me to test 4.2 Alpha or 4.1 Beta ? Latest Beta I have done it is from today with version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-02-20 18:18, hash: a3ffb51da6, type: Release

Hi, thanks for your answer, sorry for the lack of precision. I meant that some renders don’t include the compositing: look at these files : mech_rig_1_0002.png, mech_rig_1_0012.png, mech_rig_1_0013.png or mech_rig_1_0014.png are the viewlayer only and not the banner with the alpha over: ![Screenshot_20240221_232726.jpg](/attachments/29fe0d95-2282-4144-9f9b-99028e9aba4a) Which version do you want me to test 4.2 Alpha or 4.1 Beta ? Latest Beta I have done it is from today with version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-02-20 18:18, hash: a3ffb51da6c5, type: Release

Screenshot_20240221_232726.jpg

160 KiB

Germano Cavalcante commented

2024-03-25 15:49:25 +01:00

@YannK, apologies for the delay in replying.
I tested it now on 4.1.0 (Release Candidate), and I was indeed able to reproduce the problem:

However, in 4.2 Alpha, no matter how many times I render the animation, all images have compositing applied.
So it appears the bug has been fixed already.

@Sergey, any idea what might have fixed this issue and why the fix wasn't backported in 4.1?
(Bisecting this can be quite time consuming)

@YannK, apologies for the delay in replying. I tested it now on 4.1.0 (Release Candidate), and I was indeed able to reproduce the problem: ![image](/attachments/ddfffcfb-088d-42a2-ae8a-30771ef0eb8b) However, in 4.2 Alpha, no matter how many times I render the animation, all images have compositing applied. So it appears the bug has been fixed already. @Sergey, any idea what might have fixed this issue and why the fix wasn't backported in 4.1? (Bisecting this can be quite time consuming)

image.png

473 KiB

Germano Cavalcante added

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Rendering an animation skip some frames for compositing with 4.1 #118555