Image overlay in ffmpeg-python

Question

I am trying to add a watermark to a video using ffmpeg-python. My pipeline is very straightforward, but I've been unable to figure out the syntax:

new_input = ffmpeg.input(file_name).filter('overlay', 'overlay.png').output(fout).run()

This throws the error Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_overlay_7 , likely because the syntax for the overlay filter is incorrect.

Answer 1

Since overlay filter requires two inputs, the syntax is a bit confusing.

There are good example here.

---

Here is a code sample:

import ffmpeg

file_name = 'input.mp4'
fout = 'output.mp4'

(
    ffmpeg
    .filter([ffmpeg.input(file_name), ffmpeg.input('overlay.png')], 'overlay', 10, 10)
    .output(fout)
    .run()
)