I have a query with transcoding some footage shot on Red ...
Using FCPs Log and Transfer, I've transcoded some Red footage (shot at 4K HD – 3840x2160) to ProRes 422, which comes out as 1920x1080 frame size. I wanted to know why it comes out as this size, as when I transcode footage shot at 2048x 1080 it comes out as 2048x1080. Why can't I have a ProRes 3840x2160?
Maybe it has something to do with aspect ratio, as the 4K HD is 16:9 and 2x 1920 in both dimensions, whereas the 2K frame size is slightly wider. Or am I completely on the wrong tracks? Or is it something to do with the maximum res playback in the timeline, perhaps?
I must be missing something, but I don't know what. I just don't understand.
I would've thought that as that is the case, I could've transcoded to the closest possible resolution - being 2k if that is the maximum supported. I suppose its less processor intensive to transcode to multiples of 4k HD, which would result in 1920x1080.
If anyone can confirm this, or has any other ideas, I'd love to hear.