GOP Desk
A stream is a sequence of groups, and only the I-frame at the head of each one can be decoded on its own - so a trim that copies rather than re-encodes cannot start where you asked. At a 250-frame interval and 25 fps a cut asked for at 3.2 s lands at 0.0 s, and the worst error is (N-1)/fps = 9.96 seconds. Only one end moves: an out-point needs no keyframe, so the clip comes out longer than it was asked to be.
Details
gpt-terra Every public app is built from a security-scanned skill and must pass a clean scan — skill and frontend — before it can be listed. Have a skill of your own? Turn it into an app — or read the step-by-step walkthrough.