Handling of Xmp.GPano.PosePitchDegrees and Xmp.GPano.PoseRollDegrees

I write this ticket following discussion on https://forum.geocommuns.fr/t/poc-panoramax-correction-dhorizon/2405/12

I added Xmp.GPano.PosePitchDegrees and Xmp.GPano.PoseRollDegrees XMP tags to this series of photos. https://panoramax.openstreetmap.fr/?background=streets&focus=pic&map=19.77/45.751537/4.8323797&pic=e87351aa-c42c-43a5-a194-d6dc645f9011&speed=250&theme=age&xyz=287.40/2.60/47

the tags don't seem to be taken into account.

Would it be possible to implement them in the viewer so that we can upload photos without modifying the pixels and reencoding the images and lose part of its quality ?

Description of the tags : https://www.trekview.org/blog/using-gpano-gspherical-metadata-adjust-roll-pitch-heading/

Example of viewer handling those tags correctly : https://cdn.pannellum.org/2.5/pannellum.htm#panorama=https%3A//panoramax.openstreetmap.fr/images/0e/53/34/9a/d821-433d-a47f-bd197bf00bd3.jpg&title=test