I believe H264 encoding does not support 4k in portrait mode regardless of which device is used to display it. I found this out recently. It must be encoded using H265.
Some more info here: https://forums.adobe.com/thread/1635382
I believe H264 encoding does not support 4k in portrait mode regardless of which device is used to display it. I found this out recently. It must be encoded using H265.
Some more info here: https://forums.adobe.com/thread/1635382