Trim .mkv in the middle

[Freodon]

I've seen much software that can trim .mkv files, but it will only let me delete segments from the beginning of the end of the video. What if I want to delete something from the middle of the video? (I just want to delete intro theme that is between cold opening and actual episode). Also, if I want to do that on a large scale with tens of episodes (and all have the same exact intro theme), is there a way to automatically detect the intro and delete it for me instead of doing so manually in each file?

[Baldrick]

Solveigmm avi trimmer or avidemux. You set start and stop, delete, save a new mkv.

I don't know any automatically methods.

[Freodon]

And I need the process to be 100% lossless, no re-encoding. Can this software do that?

[Baldrick]

Yep. In avidemux be sure to set the video and audio to copy. It's the default setting

[Freodon]

Turns out I can't do that losslessly since the key frames are in such a position I can't cut that intro theme accurately. What settings should I choose in avidemux to force frame-accurate cutting with as little quality loss as possible on a .mkv file? (it contains a [h264 high L4.0, yuv420p, 1920x1080] video track and a [AAC 48000 Hz] stereo sound track). Or maybe some other software would be better for that?

[Baldrick]

You must reencode the entire video then. Try select x264/h264 under video.

Or use an editor with smart rendering that just reencodes around the cut. I think solveigmm video splitter supports that for mkv files.

[sambat]

Free and works.

http://forum.selur.de/topic220-mkv-cutter-tool-to-cut-h264-mkv-files-frame-accurate.html