[DCP-o-matic] How to un-letterbox content with non-square pixels without distortion?

Hi, A problem that I have run into a few times: I can't find a convenient way to remove the black bars from letterboxed content with non-square pixels and non standard aspect ratio. An example: Content with letterbox (62 pixels top and bottom) is 720x576 and has a pixel aspect ratio of 1.42:1 Display aspect ratio is 1.78:1 (16:9), so the displayed image is 1024*576 including the letterbox and 1024*452 with the letterbox removed. This gives a aspect ratio of 2.27:1 which to my knowledge does not fit any of the predefined containers. - With "Scale to" set to 16:9 the picture is not distorted but shown with letterbox and not filling the container. - Cropping top and bottom bar distorts the image because the display aspect ratio is fixed and not the pixel aspect ratio. - Changing "Scale to" to "no stretch" distorts the image because the pixels are displayed square (which they really are not). So what I need is a "Scale to" option that keep the pixel aspect ratio fixed to whatever is reported with ffprobe (specified in the video header?) - That way I can crop the image without distorting it. Have I overlooked an obvious way to make the useful part of the image fit the height of the container without distortion? The example content is available here: https://www.dropbox.com/s/2qeex6oautq8vlj/06_Oscar_1.mpg?dl=0 Cheers, Christian