I’m on a Docker container with Ubuntu 20.04 and I want to concadenate a set of videoclips from a mkv file with MoviePy

This is my code:

combinated_video = concatenate_videoclips(clips)

video_name, extension = os.path.splitext(self.video_path)
combinated_video_path = video_name + "_combinated" + extension

combinated_video.write_videofile(combinated_video_path, codec="libx264", audio_codec="mp3")

clips is a list like this:

[<moviepy.video.io.VideoFileClip.VideoFileClip object at 0x7f07eff86400>, <moviepy.video.io.VideoFileClip.VideoFileClip object at 0x7f07eff86670>, <moviepy.video.io.VideoFileClip.VideoFileClip object at 0x7f07eff86940>, <moviepy.video.io.VideoFileClip.VideoFileClip object at 0x7f07eff86c10>, <moviepy.video.io.VideoFileClip.VideoFileClip object at 0x7f07eff86100>]

I tried it on my local machine with Windows 11 and it worked, but it doesn’t on Ubuntu 20.04

This is the error i get:

MoviePy couldn't find the codec associated with the filename. Provide the 'codec' parameter in write_videofile.