AnimeSuki Forums

sunsetterx · 2008-12-22, 00:02

Hi Animusuki, I was trying to cut an .mkv (chopping the op and ed out to link them to each episode) but the cut never occurs where I specify. Let's say I tell mkvmerge to cut the file at 4:00:125. The file is indeed cut but some seconds after what I chose and as you guys may know I need a precise cut. I tried with both mkvtoolnix and avi-mux. What's happening? What would you recommend?
It's h.264 encoded btw.

Thanks beforehand.

TheFluff · 2008-12-22, 14:53

If you want to cut without reencoding the entire file, the cuts must start and end on keyframes. If there isn't a keyframe where you want to cut, mkvmerge will just cut at the nearest keyframe instead. If you use Aegisub it can tell you which frames are keyframes (the timestamp/framenumber field turns green when you're viewing one).

sunsetterx · 2008-12-23, 12:12

Thanks a lot for answering!

Well... I guess that means as long as I don't reecode I won't be able to chop the file exactly where I want to ;_;

I'm a n00b. How do I reecode it so that the .mkv is cuttable were I need it to? Also, reencoding = video and audio quality loss in any way?

I wan't the file to remain .mkv and h.264 encoded btw.

Thanks!

EDIT: I'm following your blog's entry about Matroska's ordered chapters and file linking btw.

2008-12-22, 00:02	Link #1
sunsetterx Junior Member Join Date: Dec 2008	Problem while cutting an .mkv file Hi Animusuki, I was trying to cut an .mkv (chopping the op and ed out to link them to each episode) but the cut never occurs where I specify. Let's say I tell mkvmerge to cut the file at 4:00:125. The file is indeed cut but some seconds after what I chose and as you guys may know I need a precise cut. I tried with both mkvtoolnix and avi-mux. What's happening? What would you recommend? It's h.264 encoded btw. Thanks beforehand.

2008-12-22, 14:53	Link #2
TheFluff Excessively jovial fellow Join Date: Dec 2005 Location: ISDB-T Age: 37	If you want to cut without reencoding the entire file, the cuts must start and end on keyframes. If there isn't a keyframe where you want to cut, mkvmerge will just cut at the nearest keyframe instead. If you use Aegisub it can tell you which frames are keyframes (the timestamp/framenumber field turns green when you're viewing one). __________________ \| ffmpegsource 17:43:13 <~deculture> Also, TheFluff, you are so fucking slowpoke.jpg that people think we dropped the DVD's. 17:43:16 <~deculture> nice job, fag! 01:04:41 < Plorkyeran> it was annoying to typeset so it should be annoying to read

2008-12-23, 12:12	Link #3
sunsetterx Junior Member Join Date: Dec 2008	;_; Thanks a lot for answering! Well... I guess that means as long as I don't reecode I won't be able to chop the file exactly where I want to ;_; I'm a n00b. How do I reecode it so that the .mkv is cuttable were I need it to? Also, reencoding = video and audio quality loss in any way? I wan't the file to remain .mkv and h.264 encoded btw. Thanks! EDIT: I'm following your blog's entry about Matroska's ordered chapters and file linking btw.