Text Outline
txt-line
Sets the width of the outline stroke for a text overlay on video.
txt-line accepts an integer from 0 to 100 — the outline thickness in pixels. The default is 0, which draws no outline; when set, the outline is drawn inside the edges of the text. Use txt-line[N] for a specific text layer.
This parameter works identically to txt-line in the Rendering API.
For the full list of text overlay parameters, see the Text Overlays overview.