Remove or Replace a Background in DaVinci Resolve

The short answer

DaVinci Resolve can remove or replace a background in recorded footage. It does this in post-production by building a matte, which is a mask that marks the subject as visible and everything else as transparent. You then place a new image or video underneath. There are two main routes. If you filmed against a green or blue screen, you can key out that colour, and this works in the free edition. If you have no screen, you can isolate the person with Magic Mask, an AI-assisted tool that has been offered in the paid Studio edition. Two limits matter. First, Resolve edits files after recording. It does not act as a live virtual camera for video calls. Second, removing the background changes only the picture. It does nothing to the audio, so room noise or echo in your speech has to be handled separately.

No version-specific evidence was supplied for this guide. Menu names, palette locations and edition availability change between Resolve releases. Check the exact controls in the manual for the version you have installed before you rely on any path described below.

What the two approaches are and how they differ

Approach | What you need | How it separates the subject | Typical weak points

Colour keying (chroma key) | Footage shot against an evenly lit green or blue backdrop | Selects the backdrop colour and turns it transparent | Uneven lighting, wrinkles, shadows and colour spill on the subject

Magic Mask (AI person or object isolation) | Any footage with a clearly visible subject; the Studio edition | Analyses frames to find the person or a chosen feature, then tracks it over time | Fine hair, fast motion, motion blur and subjects that blend into the background

Manual masking (power windows or rotoscoping) | Time and patience | You draw and animate shapes around the subject | Very slow for long clips and moving subjects

With a well-lit green screen, keying usually gives the cleanest and most predictable edges. Without a screen, Magic Mask is the practical option. Manual masking is mainly useful for short shots or for fixing small areas that the other methods miss.

Replacing a background with Magic Mask: the general workflow

• Put the webcam clip on a video track above the new background. In the Edit page, the clip goes on V2 and the replacement image or video goes on V1.
• Select the webcam clip and open the Color page.
• On a node, open the Magic Mask palette and choose person or feature detection, depending on what your version offers.
• Draw a stroke on the subject. Add exclusion strokes for any areas that should not be included.
• Track the mask forwards and backwards through the clip so it follows the subject.
• Refine the matte using the softness, shrink/grow or clean-up controls available in your version.
• In the node graph, add an alpha output and connect the node's key output to it. This makes the unmasked area transparent.
• Return to the Edit page and confirm that the background on V1 now shows around the subject.

Replacing a green or blue screen: the general workflow

• Place the keyed clip above the replacement background, as in the Magic Mask workflow.
• Apply a keyer. Resolve provides keying through the Color page qualifier, through keyer effects in the effects library, and through Fusion keying tools such as Delta Keyer. Exact names vary by version.
• Sample the backdrop colour on a representative area of the screen.
• Check the matte view, if available, and adjust it until the background is fully black and the subject is fully white.
• Reduce colour spill, which is the green or blue tint reflected onto skin and hair edges.
• If the clip is used on the Color page, connect the key to an alpha output. Then check the composite on the Edit page.

Why webcam footage is harder to key

These are general principles, not measured results. Webcams often record with heavy compression, automatic exposure and noisy low-light images. Compression and noise blur the edge between subject and background. Automatic exposure and white balance can shift colours from frame to frame. Both effects make a clean, stable matte harder to get. You will usually get better results from footage with even lighting, a background that contrasts clearly with your clothing and hair, a fixed exposure, and minimal movement across the frame.

What background removal does not do for your speech

Background replacement works only on the picture. Room noise, keyboard clicks, echo or a weak signal from a webcam microphone stay in the audio exactly as recorded. If the audio needs cleaning, use the audio tools on the Fairlight page or in the Edit page inspector. Recent Studio editions have included an AI voice isolation feature, but check its availability and controls in your version. Audio clean-up can make speech clearer. It cannot recover words that were too quiet or distorted when they were recorded. If the original capture is poor, re-recording or using a closer, dedicated microphone is often more effective than processing.

If you need a replaced background during live calls

Resolve works on recorded clips, so it is not a live solution for meetings. For a background effect during a live video call, use the background feature built into your conferencing app or a separate virtual camera application. Each of these has its own compatibility requirements, which were not covered by the evidence supplied for this guide.

Evidence gaps

No specifications, version numbers, prices or test results were supplied. This guide therefore does not state which Resolve release introduced each feature, the current price of the Studio edition, or how well any method performs on particular webcams. Check edition differences and exact menu paths against the official documentation for your installed version.