Overlay video with .webm format video with transparent background

[doanaktar]

Hello, I have a video in .webm format with a transparent background(clip2) and a normal mp4 video(clip1). I want to overlay clip2 video on clip1 video, but when I do that, the transparent feature in the background of clip2 disappears and a red beam of light comes on.

Here is my code:

from moviepy.editor import VideoFileClip, CompositeVideoClip
clip1 = VideoFileClip("test.mp4")
clip2 = VideoFileClip("transparent.webm")
clip2 = clip2.resize(0.25)

video = CompositeVideoClip([clip1,
                            clip2.set_position(("right","bottom"))])

video.write_videofile("my_concatenation.mp4")

[TheHimanshuRastogi]

Show both videos for better help.

[Good0007]

You can set param: has_mask=True ,like this:

background = VideoFileClip("background.mp4")
layer = VideoFileClip("overlay.mov", has_mask=True)
CompositeVideoClip([background, layer]).write_videofile("out.mp4", codec='libx264')

[jitendra-koodo]

You can set param: has_mask=True ,like this:

background = VideoFileClip("background.mp4")
layer = VideoFileClip("overlay.mov", has_mask=True)
CompositeVideoClip([background, layer]).write_videofile("out.mp4", codec='libx264')

This does not show the background video. Transparency does not seem to work.

webm video : https://rotato.netlify.app/alpha-demo/movie-webm.webm

See web view showing transparency: https://codepen.io/mortenjust/pen/BaLrjzm

Any solution/work around?

[BackrndSource]

If you install the Pull Request #2229 , or you wait until the approval and update of moviepy, you can set parameters decoder="libvpx-vp9" and has_mask=True in VideoFIleClip like this:

from moviepy.editor import VideoFileClip, CompositeVideoClip
[...]
clip2 = VideoFileClip("transparent.webm", has_mask=True, decoder="libvpx-vp9")
[...]

[OsaAjani]

Fixed with v2.1.2