Masks with anamorphic aspect ratios wrong #105590

New Issue

Steffen Dünner · 2023-03-09T09:24:17+01:00

Steffen Dünner commented

2023-03-09 09:24:17 +01:00

System Information
Operating system: Linux-5.15.0-67-generic-x86_64-with-glibc2.35 64 Bits
Graphics card: NVIDIA GeForce RTX 2070 Super/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 530.30.02

Blender Version
Broken: version: 3.6.0 Alpha, branch: main, commit date: 2023-03-09 05:15, hash: c77b78ad53e9
Worked: (newest version of Blender that worked as expected)

Short description of error
When your output is set to some non-square pixel aspect ratio (PAR), Masks are not correctly using this PAR.

I have to deal with 4.6k anamorphic footage at the moment and the "anamorphic squeeze" (or PAR) is 2:1.
Setting everything up correctly gives me correctly sized images during masking in Blender but sadly the masks' aspect ratio isn't read correctly by the Compositor:

(sadly the Compositors backdrop isn't offering aspect ratio correction, but that's another report).

I uploaded a super simple repro file with a single anamorphic frame and a mask on it.

Exact steps for others to reproduce the error

Download the attached blend file, unpack it and open it.
Switch to the "Motion Tracking" layout (should be the case when you open it):
As you can see, everything is set up correctly but the aspect ratio of the mask in the Compositor is not correct.
On the upper left you can see the unsqueezed output of the comp.

**System Information** Operating system: Linux-5.15.0-67-generic-x86_64-with-glibc2.35 64 Bits Graphics card: NVIDIA GeForce RTX 2070 Super/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 530.30.02 **Blender Version** Broken: version: 3.6.0 Alpha, branch: main, commit date: 2023-03-09 05:15, hash: `c77b78ad53e9` Worked: (newest version of Blender that worked as expected) **Short description of error** When your output is set to some non-square pixel aspect ratio (PAR), Masks are not correctly using this PAR. I have to deal with 4.6k anamorphic footage at the moment and the "anamorphic squeeze" (or PAR) is 2:1. Setting everything up correctly gives me correctly sized images during masking in Blender but sadly the masks' aspect ratio isn't read correctly by the Compositor: ![image](/attachments/a2033fed-9fc8-4c27-8506-1de7f4b6fa9d) ![image](/attachments/9d4fb47a-a552-4744-86f8-e7fa17ecaf7f) ![image](/attachments/158ead17-773d-482f-9d41-de9933d779a2) (sadly the Compositors backdrop isn't offering aspect ratio correction, but that's another report). I uploaded a super simple repro file with a single anamorphic frame and a mask on it. **Exact steps for others to reproduce the error** - Download the attached blend file, unpack it and open it. - Switch to the "Motion Tracking" layout (should be the case when you open it): ![image](/attachments/c4d803a5-27a2-46af-9b42-4fe68bcc5906) - As you can see, everything is set up correctly but the aspect ratio of the mask in the Compositor is not correct. On the upper left you can see the unsqueezed output of the comp.

Anamorphic_Mask_v01.blend.zip

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Steffen Dünner added the

labels 2023-03-09 09:24:17 +01:00

Evan Wilson commented

2023-03-10 13:36:14 +01:00

Scale node as a work-around, just pointing it out in case you hadn't thought of it. This is just an FYI, and not meant to dismiss the issue you reported.

Anamorphic_Mask_Scale_Relative.png

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👍 1

Steffen Dünner commented

2023-03-10 13:37:26 +01:00

No worries, using a scale node is what I'm doing actually to work around that problem. ;)