What to use to quickly cut Audio/Video

Solution 1:

• Avidemux (From PPA) - http://avidemux.sourceforge.net/
• OpenShot (From PPA) - https://launchpad.net/openshot/ http://www.openshot.org/ppa/
• 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

ffmpeg -ss 00:00:00 -t 00:30:00 -i input.avi -vcodec copy -acodec copy output1.avi
ffmpeg -ss 00:30:00 -t 00:30:00 -i input.avi -vcodec copy -acodec copy output2.avi  
ffmpeg -ss 01:00:00 -t 00:30:00 -i input.avi -vcodec copy -acodec copy output3.avi

Or

ffmpeg -ss 0 -t 100 -i source.m4v -vcodec copy -acodec copy part1.m4v
ffmpeg -ss 100 -t 100 -i source.m4v -vcodec copy -acodec copy part2.m4v  
ffmpeg -ss 200 -t 100 -i source.m4v -vcodec copy -acodec copy part3.m4v  
ffmpeg -ss 300 -t 100 -i source.m4v -vcodec copy -acodec copy part4.m4v

AVCONV

avconv -i input.avi -vcodec copy -acodec copy -ss 00:00:00 -t 00:30:00 output1.avi
avconv -i input.avi -vcodec copy -acodec copy -ss 00:30:00 -t 00:30:00 output2.avi  
avconv -i input.avi -vcodec copy -acodec copy -ss 01:00:00 -t 00:30:00 output3.avi

Or

avconv -ss 0 -i source.m4v -t 100 -vcodec copy -acodec copy part1.m4v
avconv -ss 100 -i source.m4v -t 100 -vcodec copy -acodec copy part2.m4v
avconv -ss 200 -i source.m4v -t 100 -vcodec copy -acodec copy part3.m4v  
avconv -ss 300 -i source.m4v -t 100 -vcodec copy -acodec copy part4.m4v

Or do some script like here: http://icephoenix.us/notes-for-myself/auto-splitting-video-file-in-equal-chunks-with-ffmpeg-and-python/

Solution 2:

With new version from ubuntu avconv

avconv -i srcFileName -c:a copy -c:v copy -ss 00:03:40 -t 00:01:12 targetFileName

• First argument time is from time
• Second argument is duration (not end time) duration may be either in seconds or in "hh:mm:ss[.xxx]" form.

To specify end time instead, use the option -to [end time].

Please refer to ffmpeg documentation for more informations