RxLab's free macOS app for making product videos end-to-end — script, music, voiceover, captions, and a 4K render — with an AI agent editing a real timeline you review.
Last verified · 2026-09-23 · by Moe Ameen
RxFilm Studio is a native macOS application from RxLab (the indie rxtech-lab organization), introduced on Show HN on September 23, 2026. It targets a specific problem: independent developers and small teams need marketing videos for their products but don't have time for editing, effects, voiceover, and subtitles. RxFilm Studio runs that whole pipeline in one window — you start from an idea, a product website, images, or existing footage, and it builds out story and structure, editing, visual and sound effects, voiceover, background music, subtitles, and translation.
It's laid out like a familiar editor: a footage library on the left, a viewer in the center, an inspector with each step's parameters and a Generate button on the right, and a sequence timeline along the bottom. Rather than one model doing everything, it routes each task to a specialist — Lyria generates music, Gemini/Azure handle text-to-speech voiceover, Whisper/Azure/OpenAI do transcription and captions (exportable as VTT or SRT), image models make stills, and Veo generates video clips — with the finished timeline rendered by Remotion to MP4 at up to 4K and 60 fps. Version history keeps takes for every generation so you can compare and roll back.
The defining feature is the agent: an embedded assistant, backed by an MCP server, that takes a plain-language request and proposes edits you approve one at a time, rather than committing to a single black-box render. The app is free to download and its code is public on GitHub; generation and an optional in-app marketplace (footage, music, effects, fonts, transitions, compositions) run on a credit/account system tied to RxLab.
Be clear about the boundary, because it defines the workflow. RxFilm Studio is a maker of one finished video per project, on macOS. It has no persistent brand/persona system across projects, no per-platform reframing, and no publishing or scheduling — it hands you a rendered MP4 and the distribution is yours. Treat versions, model choices, and system requirements as a moving target for an early indie release, and confirm them in the app.
RxFilm Studio is optimized for a single great render — one polished video, in one aspect ratio, for one moment. That's the right tool when you're crafting a launch film. The problem is that a launch film is not a content system: it doesn't fill a calendar, and one 16:9 export doesn't natively fit a TikTok feed, a LinkedIn autoplay, or a Pinterest tile. [Kompozy](/) is the layer that turns each RxFilm render into a repeatable pipeline instead of a one-off. Feed the exported MP4 in as a source and Kompozy's [Clipped Shorts](/glossary/clipped-short) mines the strongest moments into vertical cuts, auto-captions each, and reframes to 9:16, 1:1, and 16:9 — so one afternoon in RxFilm Studio becomes weeks of platform-native posts rather than a single upload.
The bigger unlock is the net-new formats RxFilm's timeline was never designed to produce. From the same source, Kompozy generates a [Blog Article](/glossary/output-buckets) and Email Newsletter, brand-exact [Carousels](/glossary/hyperframes) and Quote Graphics, and a face-locked [Persona Short](/glossary/persona-shorts) or avatar video that recaps the product in your presenter's voice — all governed by a [Persona Brief](/glossary/persona-brief) so a fast-moving indie tool's output still reads as one consistent brand. Then [Autopilot](/glossary/autopilot) schedules and publishes the whole set across the eight social platforms plus blog and email from a single queue with a per-post review. RxFilm Studio makes the video; Kompozy makes it into a content operation.
RxFilm Studio is a free, native macOS app from RxLab, introduced on Show HN on September 23, 2026, that builds a marketing or product video end-to-end — script/structure, editing, effects, voiceover, music, captions, and translation — from an idea, a website, images, or existing footage. An embedded AI agent proposes edits on a real timeline that you review before they apply, and it renders to MP4 at up to 4K/60 fps.
It routes each task to a specialist: Lyria for music, Gemini/Azure for text-to-speech voiceover, Whisper/Azure/OpenAI for transcription and captions, image generation for stills, and Veo for video clips, with the timeline rendered by Remotion. Its agent/chat uses OpenAI-compatible endpoints. Confirm current model choices in the app, as an early release may change them.
The macOS app is free to download, and its code is public on GitHub; generation and an optional asset marketplace run on a credit/account system, so cost scales with usage. It is macOS-only (Apple Silicon) at launch — there is no Windows, web, or cloud version.
RxFilm Studio renders a finished MP4 but has no publishing, reframing, or scheduling. Export it and bring it into Kompozy, which clips it into captioned vertical posts, reframes to each platform, generates companion formats (carousels, quote graphics, a blog, a newsletter, a persona recap), and schedules and publishes across nine platforms on autopilot.