Moth3r said:

To answer for g-force - no, that's not possible. The reason is that the anti-aliasing function also doubles the height of the video. The following stage in the script crops/resizes to an anamorphic image with borders; I assume it's the size of the video frame at this stage that you have used to determine the size and position of your subtitles (is it the script in this post?)

Yes, that is the script I was referring to. I suspected that it would not be possible, but now I really know. Thanks.

Moth3r said:

One easy option you could try would be to add interlaced=true to every subtitle line. This parameter adds an additional blur to the subtitle text (it's purpose is to reduce flicker on interlaced displays).

Beyond that, you would have to look at a workflow that involves using your subtitles on a blank clip, adding a resize line after the subtitles so that they then match the non-anamorphic GOUT video, and finally adding this clip as an overlay to the GOUT video before the anti-aliasing.

That looks actually quite similar to the effect the additional anti-aliasing had on the text. I think I'll go with this method, that second option sounds like too much work. Thank you so much for the help, Moth3r! I couldn't have done these subs without you. :)