laszlov

Thanks! Yes, it's built on top of ffmpeg.js.

LosslessCut looks awesome! I also created a lossless video trimming tool a couple of months ago: https://videotrim.app LosslessCut seems to be more featureful but mine works in the browser without having to install it. It also has the same limitations since cutting times are rounded to the closest keyframes, but this way there's no need to re-encode anything.