By default, many functions create non-transparent videos:

Generate a video with an alpha channel:

Overlay the transparent video over an image:

If VideoTransparency is set to False, the alpha channel of all frames is dropped:

If VideoTransparency is set to Automatic, the alpha channel will be preserved if possible:

Since not all encoders support alpha channels, an appropriate one needs to be chosen:

If the selected encoder does not support transparency, the alpha channel is dropped:

Not all formats support an encoder that is capable of encoding an alpha channel:

If VideoTransparency is set to True, the alpha channel of the images will be preserved:

Since not all encoders support alpha channels, an appropriate one needs to be chosen:

If the selected encoder does not support alpha channels, the evaluation will fail:

Create a transparent video that can be presented on a variety of backgrounds:

Overlay the transparent video onto a virtual background:

Setting VideoTransparency to True will not create an alpha channel if one does not already exist:

Use SetAlphaChannel to explicitly add an alpha channel to a video:

By default, images are blended with White if the alpha channel needs to be removed:

Use RemoveAlphaChannel to control how the alpha channel is removed: