Subtitle font size setting

[ChrisStefanec]

Is your feature request related to a problem? Please describe.
The font size of the subtitles is inadequate for some to read

Describe the solution you'd like
A font size adjustment for subtitles would be great.

Describe alternatives you've considered
I tried modifying the font size parameter in the SRT file, but it does not affect the Media Foundation or FFmpeg engine. I noticed that Media Foundation and FFmpeg have different styles that may have advantages depending on the video.

Additional context
Add any other context or screenshots about the feature request here.