Marq text quality issues

[MidnightCoder]

Version: 1.1.0. Note that the font size is 60 here.

The marq text quality is good when passing it as an argument to vlc like this:
vlc.exe --sub-filter "marq{marquee=Testing Marq,position=4,size=60}" f.vob

However, the text quality is low when using this method:
libvlc_video_set_marquee_string(...)

The latter seems to not have any anti-alias performed. Would be nice to have the same quality as the former method.