RC wrote: > On Sun, 22 Mar 2009 13:53:12 -0500 > Jonathan Busby <jonathanbusby@xxxxxxxxx> wrote: > > >> Hello. I have been trying to find a way to cut, with single frame >> accuracy, an MPEG-2 PS stream from a DVD. >> > > You can't get greater than GOP/Keyframe accuracy without reencoding at > least part of the video stream (which Avidemux does). End of story. > Yes, I know. The beginning of the cut I know to be on an keyframe boundary, although the end is not. > MEncoder does happen to have the -hr-edl-seek option, however, which > will do more or less what you want as you reencode the video. > > Thanks for the tip. :) I've now used Mplayer with the '-edlout' option to generate a cut list and indeed the time values recorded by pressing 'i' are frame accurate, or so I thought. I used said cut list with the '-edl' and '-hr-edl-seek' and a modified encoding script to run a test encode using Mencoder. Unfortunately the part(s) of the source video that I marked to be encoded using Mplayer with '-edlout' , 'i' and '.' for frame-stepping do not correspond ( after editing the cut list so that eg. 'A B 0\n C D 0\n' is changed to '0 A 0\n B C 0\n D END_OF_FILE 0\n' ie. the start and end cut point pairs now correspond to to streams of video that are *exclusively saved* . ) to the part(s) encoded in the output video. I've repeated the above only to get the same *exact* results -- the timestamps produced by pressing 'i' with the '-edlout' option using Mplayer do not correspond to *absolute* timestamps. That is, whenever there is a progressive<->interlaced transition in the source video that results in a frame rate change the video timestamps often get skewed eg. either by being reset, or jumping backwards. So, unless I'm missing something really obvious, it seems that the utility of using Mplayer as a cutting tool for non-progressive video is nil. I really don't know what to do now. Jonathan _______________________________________________ MPlayer-users mailing list MPlayer-users@xxxxxxxxxxxx https://lists.mplayerhq.hu/mailman/listinfo/mplayer-users
