Split a giant MKV into parts, at specific spots?

[Asterra]

My situation: I got a giant H264 MKV (several, actually) which happens to be several episodes of a series combined into a single file. They play one after the other, complete with credits. Why the file was authored this way, I'll never know. But I need to get them split into individual MKV files, and I obviously would like to do it losslessly.

The challenge here is that I need to be able to tell the splitter precisely where to cut off one chunk and begin the next. I would need to be able to tell the software a set of specific frames. I'd need a way of determining these frames (some sort of editor, or better yet a preview option in the splitter itself). I'd need to be able to avoid stepping on the toes of the video codec (by making sure I pick i-frames, or however one goes about it).

It would be an understatement to suggest that I wish these episodes hadn't been strung together in the same video file. But oh well.

[Baldrick]

You can try mkvtoolnix (mkvmergegui), open mkv, under Global, Enable splitting...after timecodes and enter the times. See http://www.bunkus.org/videotools/mkvtoolnix/doc/mkvmerge-gui.html#global_split

[Asterra]

Sounds good. Any recommendations for a quick and dirty way of locating (via some sort of preview) and acquiring valid timecodes? In my experience, even if one can get a given editor to load a MKV video, you can't trust the timecode it shows you because of inherent subtle inaccuracies.

[johns0]

Nope,just load it into mkvmerge,set the time you want to split at,doesn't take too much time and it splits at the closest key frame.

[thegeeman]

mkvmerge will do the trick. so will SolveigMM AVI Trimmer + MKV.