I've yet to find any code on-line that does anything but full src-rect operations... but yes, it's properly wrapped in update calls and other changes including dst_rect all work fine. Not that I need to go that far as it happens in the initial vc_dispmanx_element_add() call too.Haven't tried anything but 'full src_rect' yet... I can only report that vc_dispmanx_element_change_source() works fine. This is possibly too simple to even ask, but you are doing the vc_dispmanx_element_change_attributes() between vc_dispmanx_update_start() and vc_dispmanx_update_submit_sync(), aren't you?
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