Make the background transparent in DaVinci Resolve

The short answer

A transparent background in DaVinci Resolve takes two steps. First, create a matte with a keyer or mask that separates you from the background. Second, export in a format that stores an alpha channel. The alpha channel is the part of a video file that records which pixels are transparent. If you skip the second step, the transparency is lost: common delivery formats such as standard H.264 or H.265 MP4 files have no alpha channel, so the background becomes solid, usually black.

Two conditions limit this answer. Keying works best when the background is a plain, evenly lit color, such as a green or blue screen. Removing an ordinary room background without a screen depends on mask tools such as Magic Mask, and their availability has varied between the free and Studio editions. Menu names and feature locations also change between Resolve versions. The steps below describe the general workflow, not one specific release, so check them against your installed version.

Why the background looks black instead of transparent

Resolve's Edit page viewer shows transparent areas as black, not as a checkerboard pattern. A black background therefore does not tell you whether transparency exists. To check, place another clip or a solid color on a lower video track. If it shows through where the background used to be, your clip has a working alpha channel. The Fusion page viewer can display a checkerboard behind transparent areas, which makes the matte easier to judge.

Method 1: Key on the Color page

This method suits green- or blue-screen footage, and it also works with Magic Mask if your edition includes it.

• Select the clip on the timeline and open the Color page.
• In a node, use the Qualifier tool to select the background color, or use Magic Mask to select the person.
• Turn on the highlight view so you can see what the selection includes, and adjust it until the edge around the subject is clean.
• Right-click an empty area of the node graph and choose the option to add an alpha output.
• Connect the node's key output to the alpha output.
• If the background stays visible and the subject disappears, invert the key in that node.
• Return to the Edit page and confirm that a lower track shows through the removed area.

Method 2: Key on the Fusion page

Fusion offers more control over edges, spill and matte cleanup, which helps with hair or semi-transparent detail. A basic setup inserts a keyer, such as the Delta Keyer, between the clip's input node and output node.

• Open the clip on the Fusion page.
• Add a Delta Keyer between the MediaIn and MediaOut nodes.
• Use the keyer's background color picker to sample the screen color.
• Switch the viewer to show the matte, then adjust the matte controls until the background is fully black and the subject is fully white.
• Check spill suppression so green or blue reflections on the subject are reduced.
• Return to the Edit page, where the clip carries its transparency onto the timeline.

Method 3: Edit page key effects

Resolve also includes keying effects, often grouped under keying in the Effects Library, that you can apply directly to a timeline clip. They are quicker to set up but offer less refinement than the Fusion page. They are a reasonable starting point for evenly lit screen footage.

Exporting with the transparency intact

On the Deliver page, choose a format and codec that support an alpha channel. Then turn on the alpha export option, which appears only when the selected codec supports it.

• QuickTime with Apple ProRes 4444 or 4444 XQ is a widely used choice for video with alpha. Encoder availability can depend on your operating system and Resolve version.
• Some other codecs, such as certain CineForm or DNx variants, can carry alpha. Check which options your installation offers.
• Image sequences in formats such as PNG, TIFF or EXR can store alpha, one file per frame.
• Standard H.264 and H.265 deliveries are not suitable when you need transparency.

Some alpha options also let you choose between straight and premultiplied alpha. These describe how color is stored at partially transparent edges. Pick the type the destination application expects. A mismatch can cause dark or bright fringes around the subject.

What this means for the speech you recorded

Keying and masking act only on the picture. They do not change the audio track, so the speech your webcam or external microphone captured is unaffected by background removal. Export choices can still affect the audio. A QuickTime file can include audio alongside video with alpha. An image sequence holds only pictures, so you would need to render the audio as a separate file and keep it in sync yourself.

Also note that a file with a transparent background is mainly useful for compositing in an editor. Conferencing apps typically receive solid frames from a camera or virtual camera, so the transparency is generally not preserved there. This is an inference from how these apps usually work; no evidence specific to particular apps was available for this guide. For live calls, the background replacement built into the conferencing app or a virtual camera tool is usually the more direct route.

Evidence gaps

No version-specific documentation, test results or edition comparisons were provided for this guide. The workflow above reflects general, widely documented Resolve behavior. Exact menu labels, which features are limited to the Studio edition, and which alpha-capable codecs your platform offers should be confirmed in your installed version.