Avatar IV Generate Endpoint Returns 1:1 Video Regardless of Dimension Parameter

Hello Admin Team,

I am currently using the endpoint https://api.heygen.com/v2/video/av4/generate. However, when I pass the dimension parameter as "portrait", "1080x1920", or {width: 1080, height: 1920}, the output video is always generated in a square 1:1 ratio.

Could you please help clarify this issue?

Thank you very much!