CompositeVideoClip has no audio

Expected Behavior

The video file generated at end of the process with orignal audio.

Actual Behavior

The video file generated at end of the process has no audio.

Steps to Reproduce the Problem

def add_watermark_logo(video_filename):
    """
    Adds the logo as watermark to the video, given its filename.
    :param video_url: String containing the video filename.
    :return:
    """

    video = mp.VideoFileClip(video_filename)
    logo = (mp.ImageClip("logo.png")
              .set_duration(video.duration)
              .resize(height=50)
              .margin(right=10, bottom=10, opacity=0)
              .set_pos(("right", "bottom")))

    final = mp.CompositeVideoClip([video, logo])
    final.write_videofile("{}".format(video_filename), progress_bar=False)

Specifications

• Python Version: 3.6
• Moviepy Version: 0.2.3.5
• Platform Name: Docker on MacOs 10.13.6
• Platform Version: 18.06.1-ce-mac73 (26764)

[haigendong]

i remove the ‘-an’ and it did work

[russellyi]

I found the solution in other issue #820