How text align text filter in ffmpeg with multi line text

Question

how text align center, right , left positions with drawtext with multi line as input.

"Hello \n world"

Answer 1

FFMPEG doesn't seem to support Alignment in the drawtext command, we need to manually do so. i had the same issue, but to solve that i took a different approach, you can follow the same steps.

1. After adding your text, when you want to save it..
2. Convert those texts into the image
3. Add those images to FFMPEG with the help of the "Image overlay command".

i hope these steps help.

Answer 2

drawtext

I can think of two methods for text alignment in drawtext:

1. Use a monospace font and add the required number of spaces in line 2.
2. Use 2 drawtext instances to independently position each line.

Neither method is ideal.

subtitles

Using ASS subtitles could be a better solution.

• The Alignment parameter (or \an tag) controls the general text alignment and placement.
• The optional \pos override tag allows more precise placement.

The behavior of \pos changes depending on the Alignment. See the \pos tag documentation for examples.

Once you create the ASS file, such as with Aegisub, you can add the subtitles with ffmpeg.

Softsubs

ffmpeg -i input.mkv -i subs.ass -map 0 -map 1 -c copy output.mkv

Hardsubs

Using the subtitles filter:

ffmpeg -i input.mkv -vf "subtitles=subs.ass" -c:a copy output.mkv