Open Source TypeScript Video Converters

Free FPS is an open‑source desktop app and scripts to change a video file frame rate (FPS) using FFmpeg. Unlike video editors, it does not add effects or alter content - it only adjusts playback speed and, if needed, re-encodes audio as well. Useful if you work with multiple videos shot at different frame rates that cannot be combined or edited without interpolation or frame loss. Also doubles as a fast video compressor: keep the original FPS and raise compression (e.g., higher CRF or lower bitrate) to reduce file size. What it does: Changes video FPS via FFmpeg. Keeps or re‑encodes audio if requested. No effects, no content edits. Writes results to a separate output folder by default. Also doubles as a fast video compressor: keep the original FPS and raise compression (e.g., higher CRF or lower bitrate) to reduce file size. Important: The program is intended for users who understand what FPS conversion does. Changing the frame rate affects the speed and duration of the video

AppGrabbit is a Windows 10/11 app that downloads, transcribes and converts videos on your own computer. Paste a link from YouTube (videos, Shorts, playlists, Mixes), TikTok, Instagram, Facebook, X, Pinterest, Twitch or SoundCloud and the file lands in your downloads folder in the quality you pick, up to 4K. Turn any video into a clean .txt with a prompt on top for ChatGPT, Claude or Gemini: with captions it is instant; without them, or from your own recording (a class, a meeting, a voice note), it is transcribed on your PC with Whisper, nothing uploaded. Cut exact clips, grab thumbnails, follow channels, and convert to MP4, MP3, WAV, ProRes 422 HQ or DNxHR HQ for Premiere and DaVinci Resolve. No account, no ads. **Free plan:** 5 credits a month (a credit is one video, one batch of up to 10 links, one transcript or one converted file); when you hit 0 you can claim 1 more every 48 hours. Thumbnails, Watch and the Library are free with no cap. **Pro:** USD 8.99 a month, cancel anytime