My transparent WebM turned black in the editor, and three checks that found out why

By yue xing · DEV Community · 10/28/2026

Take an 8-second clip, cut the person out with the video background removal in ImgIng, export a transparent WebM, convert it for an editor, and the background comes out black. The first suspect is the export. In this case it wasn't the export: the black came from a later step. Below are three…

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