It will only approximately seek to a te using GOP i-frames if you do -ss before -i which in MPEG2 is generally ~15frames=0.5s. But a GOP can be pretty long, lik

It will only approximately seek to a te using GOP i-frames if you do -ss before -i which in MPEG2 is generally ~15frames=0.5s. But a GOP can be pretty long, like 30s, in MPEG4. https://ottverse.com/trim-cut-video-using-start-endtime-reencoding-ffmpeg/ https://ottverse.com/trim-cut-video-using-start-endtime-reen...