What is syntax-supercut-studio?

Syntax Supercut Studio is a local web app for creating video supercuts from podcast or YouTube transcripts. You run it on your own machine, and it connects to folders of downloaded videos and their word-level transcripts so you can search, filter, and stitch together clips into a new video file. The core feature is the supercut builder: you type a phrase or a regular expression, and the app finds every moment in your video library where that phrase was spoken, then stitches those clips together into a single MP4. There is also an AI-assisted mode that can suggest better search patterns using an xAI API key. Beyond phrase matching, the app has several other creative tools. The sentence builder picks one clip per word from your library to assemble a sentence the speaker never actually said. The songify tool detects the pitch of each clip and arranges them into a melody. The transcribe section uses xAI speech-to-text to generate word-level transcripts for any video files that are missing one. The app organizes media into "buckets," which are folders of videos you download yourself. Each bucket has subfolders for source videos, transcripts, and rendered supercuts. Once set up, you open the app in a browser at localhost:5180, browse your library, and run any of the tools through the web interface. Finished renders are saved to disk and can be played back, downloaded, or deleted from the clips page. This is built with SvelteKit and TypeScript. It requires Node 22 or newer, plus command-line tools like ffmpeg for video processing and aubiopitch for the pitch detection used by the songify feature. The app runs entirely on your own computer, and your media files never leave your machine.