Bizarre Scaling Issue on Export (bug?)

I'm having an issue where the deliver tab always exports the video cropped in to the incorrect size. Strangely, the preview in the deliver tab displays it correctly (same as the edit tab), but when I actually render the video it is sized incorrectly.
See the images below.

Preview (how it should look)

Screenshot_20230129_012535.png (540.69 KiB) Viewed 880 times

Rendered video

Screenshot 2023-01-29 012602.jpg (170.55 KiB) Viewed 880 times

Is this a bug? Any idea how I can fix this?

After trying many many things, the only way I could get it to export correctly was to check "use render cached images".
But that is obviously not ideal.

post a screenshot of you render settings and the image scaling in you project settings. using cached files is obviously not recommended

post a screenshot of you render settings and the image scaling in you project settings. using cached files is obviously not recommended

Here are the relevant screenshots. Should be pretty standard I think.

Edit page scaling settings

Screenshot 2023-01-29 215415.jpg (12.87 KiB) Viewed 740 times

Project Scaling Settings

Screenshot 2023-01-29 215344.jpg (38.16 KiB) Viewed 740 times

Export settings

Screenshot 2023-01-29 215304.jpg (87.75 KiB) Viewed 740 times

Any particular reason to use Crop instead of Fit or Fill? I'm pretty sure this is the source of the problem. Even though it shouldn't really affect the render..
Also I'm wondering why the colors on your first screenshots don't match. How are you reviewing the render?
btw. what's the source resolution? timeline is at 1080x1350 it seems, right?

Any particular reason to use Crop instead of Fit or Fill? I'm pretty sure this is the source of the problem. Even though it shouldn't really affect the render..
Also I'm wondering why the colors on your first screenshots don't match. How are you reviewing the render?
btw. what's the source resolution? timeline is at 1080x1350 it seems, right?

Yeah I think the reason must be the crop setting. But I don't know why it should effect the final render when it displays correctly at all other points in the workflow.
I chose crop because it gave me the result I was looking for. Fit and fill left black spaces around the edge of the frame.
I'm using 4k source footage, but cropped down to a 1080x1350 timeline for instagram.

The colors don't match in the screenshots simply because the first one is from within davinci, and the 2nd one is from a 3rd party video player of the rendered video.

Alright, that's what I thought. Usually Fill should not leave you with black bars, except for when they are already baked in. This can happen with external recorders for example.

Note that the viewer can show you a preview in a different resolution and aspect ratio than what the timeline is set to. For example cropped or fitted into an HD (1920x1080) output, even though the timeline might be 2K-scope (2048x858). It is possible that there is a mismatch in those settings in your project. Oh and btw, the timeline hopefully does not have custom settings active aswell right? Because if so, the project settings don't matter at all

Alright, that's what I thought. Usually Fill should not leave you with black bars, except for when they are already baked in. This can happen with external recorders for example.

Note that the viewer can show you a preview in a different resolution and aspect ratio than what the timeline is set to. For example cropped or fitted into an HD (1920x1080) output, even though the timeline might be 2K-scope (2048x858). It is possible that there is a mismatch in those settings in your project. Oh and btw, the timeline hopefully does not have custom settings active aswell right? Because if so, the project settings don't matter at all

That's a good suggestion. The timeline settings were indeed custom. However they were still identical to the project settings. I also tried changing the timeline to keep the project settings, but still got the same result on export.
If I change the crop setting on the edit page, I can export correctly, but that means going through each shot and resizing / repositioning all the elements. Its not a huge deal on a small project like this, but I'd like to understand what the problem is so that I can avoid it in the future, since it definitely is a hassle.

If I change the crop setting on the edit page, I can export correctly, but that means going through each shot and resizing / repositioning all the elements. Its not a huge deal on a small project like this, but I'd like to understand what the problem is so that I can avoid it in the future, since it definitely is a hassle.

My guess is that because the output scaling settings are at "Scale to fit" you can see the entire image in the viewer. However it somehow does not work when rendering. I'm currently infront of Resolve, so I can't test it.
For future projects I'd say use Fit or Fill right from the start. Using Crop makes life more complicated anyway. Imagine doing an show that is UHD 16:9 and conformed with Crop. When you do a 2K scope version for theatrical release it would be quite a pain to re-conform the timeline, because all of the scaling is off. Also for vertical video for social media. Fill is the most useful option for those in my oppinio, since it takes care of seeing as much of the picture as possible without having black borders.