Render with a transparent background?

[mirkobunse]

I want to render a video with a transparent background, to use it as an overlay on another video.

I have tried setting all backgrounds of the scene to a transparent color (the last two digits 00 specifying the opacity).

* {
    background: #12345600;
}

scenejs-render produces a white background in the video output, like my Firefox does when I open the scene as a web page. No transparency is shown. The white backgrounds are already present in the .scene_cache/, so ffmpeg is not (yet?) causing the issue.

Is there a solution already or would transparency be a new feature? In any case, thanks for making scenejs and scenejs-render such a beautiful product, already!

[daybrush]

@mirkobunse
I'm sorry. transparent is not processed yet.

I'm also thinking about this part.

[ironyee]

Is there any idea how to embed a video in scene.js?

[slucha]

upvote for this feature :)

[usmanpakistan]

@ironyee Video and audio features are already supported by this awesome library. Here is how to do it

const mediaScene = new MediaScene();
    mediaScene
        .addMedia("background", "./background.mp3")
        .seek(0, 40.79);
    
    mediaScene
        .addMedia("video", "./video.mp4")
        .seek(0, 40.79)
        .setVolume(1)
        .setPlaySpeed(1)
        .setDelay(startTime);

    scene.setItem("video",mediaScene);

[mirkobunse]

That's amazing, thanks! Indeed, your solution will solve the problem I had. :)

A transparent background, though, would allow users to overlay scenejs clips in other software, like video editors. Therefore, I suggest to keep this issue open.