How to increase line-height of text using drawtext with FFMPEG? - ffmpeg

Question

I'm using the current code to create a video with some text of several lines. When executed I'm receiving a video with the text joined vertically because of lacking space. How do I do to add line-height space?
ffmpeg -i videoInput.mp4 \
-vf drawtext="./font/Roboto/Roboto-Bold.ttf: \
text='testing text \ntesting text \ntesting text':\
fontcolor=yellow:\
fontsize=36:\
box=1:\
boxcolor=black#0.5: \
boxborderw=160:\
x=(w-text_w)/2:\
y=(h-text_h)/2"\
-codec:a copy \
videoOutput.mp4

Answer 1

To increase the line-height add a line_spacing parameter to the command,(http://ffmpeg.org/ffmpeg-filters.html#drawtext-1)
So it looks like:
ffmpeg -i videoInput.mp4 \
-vf drawtext="./font/Roboto/Roboto-Bold.ttf: \
text='testing text \ntesting text \ntesting text':\
line_spacing=30:\
fontcolor=yellow:\
fontsize=36:\
box=1:\
boxcolor=black#0.5: \
boxborderw=160:\
x=(w-text_w)/2:\
y=(h-text_h)/2"\
-codec:a copy \
videoOutput.mp4
Or
Some trick is to append a double breakline on the desired text. It would look like:
text='testing text \n\ntesting text \n\ntesting text'
ffmpeg -i videoInput.mp4 \
-vf drawtext="./font/Roboto/Roboto-Bold.ttf: \
text='testing text \n\ntesting text \n\ntesting text':\
fontcolor=yellow:\
fontsize=36:\
box=1:\
boxcolor=black#0.5: \
boxborderw=160:\
x=(w-text_w)/2:\
y=(h-text_h)/2"\
-codec:a copy \
videoOutput.mp4