Use a more precise, but much slower method for skipping areas. Areas marked for skipping are not seeked over, instead all frames are decoded, but only the necessary frames are encoded. This allows starting at non-keyframe boundaries.
NOTE : Not guaranteed to work right with ‘-ovc copy’.
note: it’s mencoder only, doesn’t mean anything to mplayer I guess [?]
That last message means “if your EDL goes between i-frame boundaries it won’t transcode right” (but means that if you *are* transcoding, the EDL will work more accurately, see http://en.wikibooks.org/wiki/Mplayer#Split.2Fsub-section_videos