Text Direction
txt-dir
Sets the text direction for a text overlay on video.
txt-dir accepts ltr (left-to-right) or rtl (right-to-left). Use rtl for Arabic, Hebrew, and other right-to-left scripts. Use txt-dir[N] for a specific text layer.
This parameter works identically to txt-dir in the Rendering API.
For the full list of text overlay parameters, see the Text Overlays overview.