[orca-list] GTK video editor for Linux accessible with Orca

["Mgr. Janusz Chmiel" <janusz chmiel volny cz>]

Dear users,
Does somebody of you know about GTK video editor, which may be not 
available in standard Linux repositories? Which I can use to join 
several video files and export them in specified format? The best would 
be, if I could specify video frame rate in KB/S manually, also photos 
per seconds.
Or is there any console command line tool which can join video files?
I Am facing with complex issue. I need to also compress .MP4 video. But 
I do not know, if there are some free and legally available high quality 
compression codecs, which can compress videos similarly like expensive 
video editors for Windows. Ubuntu contain some codecs, which Canonical 
have acquired The license for them. But I do not know, if those codecs 
are capable to compress video so much like Vegas for Windows for example.
Or if some company sells some better codecs for Linux? Or do I have to 
do such thinks only on proprietary operating systems like Windows or 
Macintosh?