Knockout API vs Video Background Remover CLI

Knockout API provides image and video processing through a browser app and API. Its image tools cover background removal and replacement, batch processing, masking, smart crop, stickers, outlines, shadows, and inpainting; the API also handles upscaling, portrait restoration, colorization, and object removal. Video background removal runs asynchronously, with job polling for progress. The browser Canvas supports layered designs with text and effects, and users can save canvases and cutouts to a free account. Developers can connect through REST, any HTTP client, or official Node, React, Python, and CLI options. The service says it manages GPU processing, endpoint updates, usage records, credentials, teams, and billing. Its privacy policy says uploaded images are processed in GPU worker memory, not retained after the response, and not used to train models. The Free plan is free, with 30 images per month and 60 requests per minute. Pay-as-you-go is $0.02 a month, with metered usage billed monthly; Plus is $10 a month. Paid tiers have no monthly cap and a 600-request-per-minute limit.

Video Background Remover CLI is a free Linux command-line tool for removing video backgrounds with rembg and OpenCV. It accepts MP4 and MOV files and can export processed video, transparent PNG or WebP frames, and animated WebP or GIF files. Removed backgrounds can be replaced with a solid color or an image. Available models include isnet-general-use, u2net, u2netp, u2net_human_seg, and silueta. The CLI can convert MatAnyone foreground and alpha video pairs, or invoke MatAnyone 2 through matanyone2-runtime. A bundled Gradio WebUI provides a CLI Export tab and helpers for WebP, GIF, frame ZIP, MP4, and WebM output. Installation uses pip, Python 3.10 or later is required, and FFmpeg is not required. Models download on first run. Regular video output composites transparent pixels onto a selected background or black by default, so it does not preserve alpha. Long GIF exports can become large. Silueta is described as higher quality but slower, while u2netp is lighter but may lose quality on complex fire frames.