Right now there is one really serious competitor coming out with it’s brand new open source non linear video editing product. I am talking about Lightworks` Oscar winnig Editshare which has been released open source last year. Feel free to discover their website http://www.lightworksbeta.com/ and tons of professional features it has. Yes this is not intended for video editing noobies but this is going to become a really brilliant piece of software for Lin/Mac/Win. Right now only Win version is accessible but:
This video editing software offers customizable layout support, a clip list, a multi-track timeline, automatic backup, keyframe special effects, and transitions. Are you using any unique file format or camcorder? Not a problem — Kdenlive supports almost everything available. It should also be mentioned Kdenlive supports Mac OSX and FreeBSD as well. Another important feature is the Proxy editing. This cool feature can automatically create low-resolution copies of your source clips to allow light-weight editing, and then render using full resolution.

I make short films, the last one was 30 minutes long, and I used Premiere Pro for it. Premiere was very buggy for me, I don’t know if this is the case for everyone, probably not. I tried (well, let’s say I’ve installed them and looked at them) a few video editors, including Cinelerra, Kdenlive. I found Cinelerra’s interface really ugly (controls, icons…) while Kdenlive seems very clean and functional. I didn’t tried them with real projects, but I’ll try to. But I just can’t imagine Cinelerra is a good software, seeing his ugliness :)
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Blender is a fabulously sophisticated 3D computer graphics and animation creator. Check out the Blender gallery for a sampling of movies created with Blender. It supports a large range of high-end abilities such as ray-tracing, key-frame animation tools, object tracking, super nice character modeling, realistic physics for great liquid and smoke/mist/gas effects, and realistic movements of objects and characters, and excellent realistic light effects.

Preview very slow (need to create a proxy 25% the scale and also resize the render output and even then it's often still slow) Doing a zoom (pan/scan) requires hacks https://blender.stackexchange.com/questions/42094 Transitions are fully manual Playback speed adjustments are very manual especially if you want to keep them in sync with the audio. .... See More
Whether you’re a professional video editor looking to get some serious work done, or a regular person looking to make a quick slide show, we’ll help you find the best tool for the job. All of the video editors we cover in this list can be found in most Linux distribution’s software repositories. To install any of them, just open your package manager, search and install. Alternatively, visit the websites linked to install them.
Paul, this is the biggest problem with getting linux accepted. “If you can’t figure it out, theres always fisher price.” that attitude makes people who are having difficulty turn back to other operating systems. Not everyone out there is a computer geek, many have no clue about terminal or how to find and install software. Windows has wizards, with Linux, sometimes you need to be a wizard. So lighten-up and remember that people will judge linux by the people they meet. Be an ambassador for the movement, not an ass.
Shotcut is anther video editing software for Linux and it is an interesting one because its UI looks more like a media player than an editor. The software makes editing video very simple with the set of awesome features it has. For basic uses, it will work just fine, but if you need more powerful options, especially for advanced or professional video recording, then it may not be the best. However, with the features it has, it qualifies as a decent video editor for Linux.
A non-linear editing system (NLE) is a video editing (NLVE) or audio editing (NLAE) system which can provide editing method for video clips or frams. You will be able to access any frame in a video clip. Non-linear editing is done for film and television post-production. However, the cost of editing system gone down and non-linear editing tools (including software) are now within the reach of most home users.
Look at the screenshot I attached above. I want you to look at the left sidebar. The #01 “Getting Started” video is what I just walked you through. You can see there are more video instructions. The videos are between 2 and 5 minutes long each, so it doesn’t take long at all to become acquainted with the software. The 5 additional training videos include the following topics.