I guessed from the title it was going to be using ffmpeg, because I myself have used ffmpeg's `-ss`, `-t`/`-to`, and `-codec copy` numerous times for this exact purpose.<p>Then I saw that this bundles its own piece of Chromium and ffmpeg and is ~70 MB in size. Something is seriously wrong with today's app development ecosystem if it takes 70 MB, even when I already have both Chromium and ffmpeg on my system.<p>EDIT: On the other end is QtAV, a cross-platform multimedia player and SDK which took me only 1 MB of network download. It uses Qt and ffmpeg, both of which I already have on my system, so it doesn't have to redundantly bundle anything.<p>On OSes without Qt and ffmpeg in their package repos (OS X and Windows), the players are ~ 20 MBs in size. So even if one argues "cost of cross-platform compatibility", it still doesn't make sense to bundle the entirety of a web browser for something as simple as this.