[FFmpeg-user] Accurately video trim (fast)

[Andrew Berg]

On 2011.06.25 07:10 AM, m.kog wrote:
> So my question is: how to accurately and fast trim video files without
> encoding.
You can't get frame-accurate cuts without reencoding at least the GOP at
the beginning of each cut (unless the cut you make happens to be at an
I-frame). If you cut off an I-frame, you lose information required to
properly decode the rest of the GOP.