[FFmpeg-user] how to control quality of subtitles

[Peter Münster]

Hi,

I would like to learn, how to control the quality of the displayed
subtitles.

This is how I create the video:

ffmpeg -i input.ts -map 0:0 -map 0:1 -map 0:2 -c:v libx264 -c:a copy
       -c:s dvdsub output.mkv

This looks nice with VLC: http://pmrb.free.fr/tmp/ffmpeg-test/vlc.jpg
But very ugly with a Samsung TV:
http://pmrb.free.fr/tmp/ffmpeg-test/samsung.jpg

How could I get nice looking subtitles on this kind of Samsung TV
please?

Thanks in advance for any hints,
-- 
           Peter