Translations:Archive:Kdenlive/Manual/Effects/Alpha manipulation/3/en

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In previous versions of Kdenlive (<17.04 ??) Alpha Manipulation effects always needed to be used in combination with a composite transition or an Affine transition . This is because Alpha Manipulation has to do with manipulating the so called "alpha-channel" of images and videos. The alpha channel is data that describes how two images are to be combined (or composited) into one. So you needed a composite (or affine) transition on the timeline to tell Kdenlive that you are compositing the videos from two different tracks into one image.

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