Quoting Tom from RCG -
"All resolutions are supported! But what you get is a tall, narrow "portrait" version, e.g. 9:16 aspect ratio instead of a "landscape 16:9 image. Note that most monitors (e.g. 1080p resolution) will not have enough vertical pixel count to display the full sized height of a 90 deg. rotated 1080p video (1920 pixels) or even a 720p video (1280 pixels), so the video will either play in a down-scaled size to fully fit the monitor display, or be cropped or scrollable in a window to view the entire height, depending on what software is being used to display the video. WMP and VLC default to a down-scaled image that fits the monitor height on my system, but MPC-HC defaults to a cropped image (appears to be from the middle of the full height frame) and is not scrollable, but the frame size can be set in the software user settings to display like the other two."
Thanks, that's interesting, I hadn't seen Tom's post yet. I based my remarks on looking at the manual config options on the support page.
VIDEO MODE 1
Movie Resolution=[
0];0:1080p,1:720p,2:wvga
Movie Frame Rate=[
1];0:120fps(only for 720p and wvga),1:60fps,2:30fps,3:WDR30fps(only for 1080p)
Movie Sound=[
2];set movie sound,0:Mute,1:Low,2:Medium,3:High
Movie Cycle time=[
2];movie cycle time,0:3 minutes,1:5 minutes,2:10 minutes,3:20 minutes
Movie Loop Recording=[
0];set loop recording on or off, 0-0ff, 1-on
Movie Rotate=[1];set movie rotate,0:No,1:Inverted,2:90 degrees Right,3:90 degrees Left
Movie Time stamp=[
1];set date/time stamp on or off,0-off,1-on
Movie quality=[
3];set movie quality,0:Highest,1:Higher,2:High,3:Standard,4:Low ,5:Lower,6:Lowest
Movie Codec=[
1];set video codec,0:H265 HEVC,1:H264 AVC