How to Remove a Video Background With AI (Alpha Output, 2026)
Choose your settings and review the credit cost before generating.
Create your first videoCutting a subject out of footage used to mean a green screen, even lighting, and chroma keying or frame-by-frame roto. Color keying breaks the moment your subject wears green, the screen wrinkles, or the lighting shifts. AI background removal identifies the subject itself instead of deleting a color. This guide covers how that works, the exact output format, and where it fits in a short-form workflow.
What does "remove background from video" mean?
It means separating a moving subject — a person, a product, an object — from everything behind it, then discarding the background. The output is a transparent video: a clip carrying an alpha channel, where the background pixels are empty rather than a solid color. You can then stack the clip over any new layer: a generated scene, a product shot, a brand color, or other footage.
This is different from blurring or replacing a background in-camera. You get a cutout you can reuse across multiple edits without re-keying.
Related questions: What is an alpha channel in video? Is a transparent video the same as a PNG sequence?
How does AI remove a background without a green screen?
Green-screen keying is color math: the software erases every pixel within a target color range. That demands a clean screen, flat lighting, and a subject who avoids that color. AI background removal doesn't depend on a key color.
Segmentation models such as BiRefNet predict which pixels are foreground versus background from shape, edges and context. That means they can work on footage shot anywhere: a kitchen counter, a street, a desk. Because the matte is predicted frame by frame, watch for edges that flicker or shift between frames, especially around hair, loose fabric and fast-moving hands — these are the areas to check before you publish.
Related questions: Does AI background removal work in any lighting? How does BiRefNet detect a subject?
How do you remove a video background in Viralance?
Viralance's Remove BG tool is one of the cards on the Edit Video page and runs on BiRefNet v2 (fal-ai/birefnet/v2/video):
- Open Edit Video → Remove BG.
- Add your clip under Source Video — upload a file up to 60 seconds, or use Choose from My Videos to pick one you generated in Viralance.
- Press Remove Background. The job runs in the background and the result appears in your videos library.
- Download the transparent WebM (VP9 with an alpha channel).
- Composite it in your editor over a new background: an uploaded image, other footage, or a scene you generate with Viralance's image and video models. Viralance doesn't composite the layers for you.
Each run costs a flat 4 credits regardless of clip length (up to the 60-second limit): $1.20 at the Mini pack rate, about $0.72 at the Business rate. Failed jobs are refunded automatically. New accounts' 4 free credits after verification cover one run.
Check your editor supports WebM with alpha before you start. If it doesn't read the transparency, convert the file to a format your editor does support (for example ProRes 4444 or a PNG sequence) with a conversion tool first.
Related questions: How long can my input clip be? How much does AI background removal cost? What format is the output?
What can you do with a transparent video once it is cut out?
- Product ads: Isolate a product from a messy filming setup, then place it on a clean gradient or a generated lifestyle scene.
- UGC and talking-head edits: Put a creator on a branded backdrop, a graphic, or a different location.
- Reaction overlays: Float a cutout speaker in the corner over gameplay, a tutorial, or a screen recording.
- Multi-version testing: Cut once, then place the same performance on several backgrounds to test which one works.
Since the subject is separated, you can also reposition, scale or animate it independently of the background in your editor.
Related questions: Can I put a cutout subject over AI-generated footage? How do I make a reaction overlay?
How do you get clean edges on the cutout?
- Shoot with contrast. A subject that separates from its surroundings in brightness or color gives the model an easier boundary, even without a green screen.
- Keep motion readable. Heavy motion blur softens edges in any system; steadier movement holds a tighter matte.
- Avoid background clutter that mimics the subject. A person in a brown coat against a brown wall is harder than the same person against a contrasting wall.
- Start with a sharp source. Well-exposed, higher-resolution footage gives the model more edge detail.
Related questions: Why are the edges of my cutout rough? Does background removal lower video quality?
When is a green screen still the better choice?
If you control the shoot and need broadcast-clean edges on fine hair or semi-transparent materials (glass, smoke, veils), a well-lit green screen and a proper keyer still give you more control. AI removal is most useful when the footage already exists or a green screen isn't practical. For a still image rather than video, use Edit Image → Remove Background instead (1 credit, transparent PNG).
How does this fit a full short-form workflow?
Background removal is one step in a pipeline. A typical sequence in Viralance: generate or upload footage; if you need a different shape, run Reframe on the source first (clips up to 10 seconds, from 6 credits); cut the subject out for 4 credits; generate a fresh background with an image or video model; composite in your editor; then add captions — either in your editor or by uploading the finished MP4 to Subtitles (3 credits). Download the result and upload it yourself to TikTok, Reels or Shorts; Viralance does not post for you.
Quick answers
Can I remove the background from any video? It works best on a clear, well-defined subject — people, products and objects — on clips up to 60 seconds. Busy scenes, several overlapping people and heavy motion blur produce rougher mattes.
What format is the output? A transparent WebM (VP9 with alpha channel).
What does it cost? A flat 4 credits per run on BiRefNet v2, paid from one-time credit packs with no subscription.
Related questions: Does it work on old footage? Can I batch multiple clips?
