[FFmpeg-user] dvdsub scaling 'fatness' work around?

[Mark Filipak]

dvdsubs are RLE (run length encoded) bitmaps.

It appears that when dvdsubs from SD are encoded into full-HD, the run
lengths are 720-to-1920 scaled and the lines (for NTSC DVDs) are
480-to-1080 scaled. That's great. However, the character bodies in the
resulting dvdsubs are very fat and overrun each other. I presume the
overruns are because the spaces between letters are not also scaled. The
resulting subtitles are still somewhat readable but difficult.

Does anyone know of a work around?

Ideal would be scaling without 'fatness' by keeping letter stoke widths
unchanged but scaling the heights and widths in addition to position --
yes, that will be tricky. Also ideal would be control over the palette.

--Mark.