So how does a mobile phone know how to rotate the video back to portrait if that is how it was originally shot? Most original media files carry with them a collection of metadata fields that describe the content in various ways, such as encoding, dimensions, duration, etc. I'm sure there's a simple solution, but I can't see what it is.Video files produced on camera phones are always saved out as landscape. I've reported this to LG but their response is 'just get used to it'. It does in most apps, but in the Home Screen, it maintains Portrait mode whichever way I hold the phone. There is another possible clue to what's happening - the phone doesn't always sense its orientation correctly. The phone displays the ISO and exposure etc the righ way up in the top right of the viewfinder image.

I can put the slides upside down in the copying device but that creates other issues. IrfanView shows the Orientation as Top Left. If I do it again, it sets the Orientation# to Horizontal (Normal) but File Explorer IrfanView and Access now all see the image inverted. If I type 1 in the textbox at the bottom right of the screen the Save button doesn't become enabled but the Orientation# field changes to 1. Changing the Orientation# in Workspace doesn't seem to work. exifToolGUI gives the Orienstation in IDF0 as Rotate 180 but in IDF1 as Horizontal (Normal). It shows the exif orientation as 'bottom right. Windows File Explorer and MS Access show them upside-down. Because of the design of the copying device I built, the phone is capturing the images in Inverse Landscape mode - the camera button is at the left.

I am capturing photographic slides using my LG K51S mobile phone camera.

I am having major issues with exif Orientation settings.

Exiftool orientation flag