Can't render or join Hindi ligatures in FFmpeg drawtext

Question

I have been trying to drawtext over a video in Hindi language but some characters are not rendering properly:

The proper way is:

I have enabled libfridi, libfontconfig and libfreetype.

Even tried on Ubuntu.

ANS: please see comment to Pops answer.

Answer 1

Convert the Unicode to KrutiDev and use the KrutiDev font. I have done an example using C# for Unity here.