New relative size build, refactored to resolve the issue which was causing unintended display issues with some ASS subtitles when enabled. Otherwise not much different in behavior to the previous Test3 build, other than it now just having a just a simple enable/disable toggle. Originally I had planned to add a second option with a modified version of vsfilter's default 'relative height' behavior which functioned similarly to my 'relative width' option, but I was unsuccessful in making it do exactly what I wanted. Unlike our developer, I'm just not familiar enough with how all the srt scaling logic interacts with each other.
So unfortunately Sm3n, you'll just need to disable the option when you require constant size with horizontal padding. I have modified the 'relative size' option to produce identical output at 1920x1080 display with and without the option enabled, which should at least make switching between the two a bit easier in that scenario.
XySubFilter_Relative_Output_Size_Test4