Is there any way to move subtitles down?

[GREAT_SALAD]

I was just wondering if there's any way to move the position of subtitles in an MKV file? When I run a BR rip through Handbrake to save on some file size and keep the subtitles in with an MKV format, they end up being really high up in the frame and it's pretty annoying. In the past I've also compressed them to MP4 files without subtitles, and used SubtitleEdit to get subtitles out from the original rip into a standalone SRT file but the OCR process almost always has dozens and dozens of errors so I have to go through all the subtitles manually to correct them and it's just pretty tedious... is there any better way to do this that I'm missing? Either by keeping the subtitles in an MKV better, or getting subtitles by themselves without correcting tons of OCR errors.

Here's an example of high subtitles from an MKV:


And good subtitles on an MP4 + SRT:

[LambTalk]

This is due to the PGS subtitles from the BluRay having a different aspect ratio to your video after you encode it in handbrake and crop out the black bars.

Upon playback, the subtitles are resized to fit the new frame, which has the adverse effect of rendering them higher in the frame than they're supposed to be

What you can do is OCR the image based subtitles to text based SRTs, or you can look at using something like PGS-Tools to crop the subtitles to match your video resolution.
https://github.com/wswartzendruber/pgs-tools

[tmsrxzar]

graphical subs are always at the mercy of the graphical part, they decide how to position
if you are cropping as suggested by the previous post then try not cropping at all, it takes more processing time and the reduction in file size is likely no more benefit than dropping the bitrate by 1 or 2, black does not contain enough information that it bloats video
proper aspect ratios are indeed important