Media Encoder: Buffer dimensions 1088x1920, video size 1080x1920

Hi there,

hope, anybody could help:

When exporting a composition from AE (dimensions: 1080x1920), I could export the composition with AE's render module to an AVI which video size is 1080x1920 and buffer dimensions are 1080x1920.

When trying to encode the composition with media encoder (H264, H265, DNxHR), it always renders video size 1080x1920 but buffer dimensions 1088x1920.

Tryed to sync settings with source, trying to not sync but manually configure settings: same result.

When encoding the avi from AE rendering into a H264: same behaviour: AVI has 1080x1920 buffer dimensions, H264/H265/DNxHR has 1088x1920 buffer dimensions.

Media encoder: latest version, Windows 11.

I should be glad if anybody has an idea how to solve this and where to start looking for a solution..

Thanks,

Kind regards

Marcel