If just need to crop Audio/Video from a longer track, what can I use? I tried OpenShot, but I find the export video slow, perhaps its compling all the "layers" into a new movie? Perhaps I just need a simple "crop" tool for audio/video will surfice?
Avidemux (From PPA) - http://avidemux.sourceforge.net/
Pitivi (From PPA) - http://www.pitivi.org/?go=download
I was going to mention commands like ffmpeg or avconv (The new one) which can OBVIOUSLY split files into groups. For example:
FFMPEG (Deprecated in 12.04+)
Or do some script like here: http://icephoenix.us/notes-for-myself/auto-splitting-video-file-in-equal-chunks-with-ffmpeg-and-python/
I'm using ffmpeg CLI interface for that. It's very easy and fast:
In both of these
You can calculate duration e.g. using LibreOffice Calc or python's
For quickly cutting I have used MythTV. I recorded some show, let it automatically search for the commercial breaks and fine-tuned the found markers. After this I started the Myth archiving function and burned all to DVD, without the commercials.
I have to admit, it worked gread from about 2006 or such. Somewhere in 2008 or 2009 some update ruined it all, my markers where somehow shifted.
Right now, I'm in the progress of re-installing this myth stuff, just to see if I can get the trimmer/editor and archiver working.