Is is possible to crop video and add a keyframe wherever I want without having to re-encode? I have a video with 20sec or so I'd like to get rid of and of course the keyframes don't match up with the crop points I want to use.
You have to re-encode the part where you are cutting. So from the previous I frame throught to where you want the cut point, then on the other side from the cut point to the next I frame.