Bria Video Green Screen

Chroma-keying a video locally is a rabbit hole of per-frame segmentation, temporal flicker, and edge cleanup. Bria Video Green Screen skips all of it: feed it a video and it comes back with the subject keyed onto a clean, solid chroma background - ready for your favorite keyer in an NLE, or for compositing into a real scene. It's the video sibling of Bria Video Remove Background, but instead of transparency (or a solid fill color) you get an actual green/blue screen, which downstream editing tools can key much more reliably than an alpha track in a compressed webm.

It's part of the official BRIA AI API nodes pack: the clip goes up to BRIA's cloud, the processing happens there, and you need a BRIA API token from platform.bria.ai. No local model, no GPU, no per-frame hair-pulling.

How it works

Local video paths are uploaded to S3 via a presigned URL first; then the video is POSTed to BRIA's /v2/video/edit/green_screen endpoint. The node polls the returned status_url until the job completes (video jobs run long, so the timeout is generous) and hands back a single STRING: result_video_url. Because that's a URL and not a local file, wire it into the Bria Preview Video node to see the result in the ComfyUI UI, or pull the URL down however you like.

The inputs that matter

• api_key - required; the BRIA_API_TOKEN placeholder is rejected, so paste your real key.
• video_url - a public URL or a local path.
• green_shade - this is the one people actually care about: broadcast_green (default, the standard TV green), chroma_green, or blue_screen. Pick blue if your subject's wardrobe is green - that's the entire reason the option exists.
• output_container_and_codec - defaults to mp4_h264, and unlike the RMBG node that's a sensible default; mp4/h264 is what most editors ingest. webm_vp9, mov_proresks, and gif are also available.
• preserve_audio - on by default; keeps the sound track through the key.

Install

The pack has no requirements file and no models:

cd path_to_comfyui/custom_nodes
git clone https://github.com/Bria-AI/ComfyUI-BRIA-API.git

or ComfyUI Manager → search "BRIA API" → restart. Grab a token, paste it in, go.

Gotchas

Two things trip people up. First: this is a paid API call and video processing is the priciest thing in the pack - every run burns real credits, so trim your clip before you send it, don't iterate on the full-length file. Second, the green-shade default is broadcast_green, and if your subject is wearing green you'll get holes where the keyer (and BRIA's matte) agree the subject is background. That's what blue_screen is for. And remember the output is a keyed video, not a transparency mask - if you wanted true alpha for compositing in ComfyUI itself, you want the Remove Background node with background_color: Transparent instead.