I have the following set up in my XML:
videointerface_addmenuitem(configmenu, q1, 'Extreme', false, change_video_file(q1, 'videos/beard-4096x2048.webm|videos/beard-4096x2048.mp4'); );
videointerface_addmenuitem(configmenu, q2, 'High', false, change_video_file(q2, 'videos/beard-1920x960.webm|videos/beard-1920x960.mp4'); );
videointerface_addmenuitem(configmenu, q3, 'Medium', false, change_video_file(q3, 'videos/beard-1024x512.webm|videos/beard-1024x512.mp4'); );
As you can see, I have put the webm first, so that chrome and firefox favours webm. Mp4 is there as a fall back for safari.
I have tested all the combinations, so I know that it works the way it should (with webm being favoured over mp4, except where webm doesn't work, then mp4, etc).
When I use Chrome or Firefox, the first video play is fine. Selecting different resolutions is fine. Both the webm and the mp4s play fine, and I have tested that the correct file is being called.
However, in Safari - when I load the page, it works fine! Playing back the mp4 fallback as expected. Great. Until I click on a different resolution. Then the player stops and will not load the next video.
Further to this, on iOS, I get the same issue. In Chrome (iOS) and Safari (iOS) - the first play works fine, but selecting an alternative angle does not - I get the error: "ERROR: videos/beard-1024x512.mp4 - loading video failed!"
My krpano is up to date (1.18.4) but I also had the same issue with 1.18.3.
I know the MP4 files are fine, because they play on the first load without issue. It is just selecting the new files, and only in Safari / iOS. It's as if, for some reason, Safari and iOS are trying to load the webm in place of the mp4 (perhaps because I have it listed first?)