Frame size 9:16 appears as 8:13

[Clercq]

When I change the frame size in a sequence to 900x1600 or 1080x1920 it does not appear as 9:16 but 8:13. When exported to pc, the dimensions in "get info" are 984x1600. I'm trying to export a vertical video to share on social media, I'm using Airdrop to share the file with my iPhone. The frame size is odd, so my iPhone won't detect it as a video and says that it "failed to save item." Some screenshots:

I've searched everywhere for an answer, but vertical videos seem to be quite an undiscussed topic.

[Ann Bens · Accepted solution]

Adjust the pixel aspect ratio to 1.0 (as in square pixels)

and set fields to Progessive

[Clercq]

You are my hero! Thank you so much for the quick reaction, this forum is awesome.

[LuckyMike]

Thank you ! I was so confused at this one, happy to find this answer.