ffmpeg drawtext how to set direction right to left

Question

i write arabic text to videos and it works fine but the issue is that the arabic language is written from right to left so the text must align right not left i get the text like this
and it should be like this

my code

ffmpeg -y -i input.mp4 -vf "drawtext=text_shaping=1:fontfile=C\/:/Windows/Fonts/tradbdo.ttf:\
textfile=text-new.txt:fontcolor=white:fontsize=40:x=w-tw:y=h-50*t:" -c:v libx264 output.mp4

Columbine

@LordNeckbeard the subtitles centers the text by default, which is good, but it still doesn't set the right-to-left mode. In HTML, you would do this with <div dir="rtl">. The most obvious error resulting from this bug is that the full stop at the end of sentences is put all the way to the right, instead of all the way to the left. – Respiratory

this is worked for me as well as i desired. i try to move text by x , y in command – Dissociate

Any luck solving the issue? @Abdalla – Finedrawn

unfortunately no – Columbine

what if i want to use drawtext instead of subtitles? – Purser