Last 5 years of my 7 years Linux experience I was regularly challenged by day-to-day video editing tasks. Main content was 720p/1080i/1080p in ts/m2ts/mp4/mov. The most useful instruments that produced a really nice results was combination of avidemux, kdenlive and VirtualDub (under Wine). As per my experience you are able to get excellent results with those tools but the problem is workflow really uncertain and not stable sometimes. Lack of features also has place. But the situation changes. Right now Kdenlive project is really nice. It has tons of features and stable enough for relatively serious editing/finishing. I am sure this won’t be too hard for any person interested to learn Kdenlive workflow. Otherwise this person is too lazy for Linux in general. You may find plenty of video lessons on ytube/vimeo.
By far, this is the most professional video editor for Linux available in the market. DaVinci Resolve is a powerful video editor and is commonly used by cinema production houses all over Hollywood. It comes with amazing features such as editing, professional audio post-production, and color correction, enabling professionals to create TV-shows and even movies.
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:
Kdenlive is an intuitive and powerful multi-track video editor, including most recent video technologies. Kdenlive supports all of the formats supported by FFmpeg (such as QuickTime, AVI, WMV, MPEG, and Flash Video), and also supports 4:3 and 16:9 aspect ratios for both PAL, NTSC and various HD standards, including HDV. Video can also be exported to DV devices, or written to a DVD with chapters and a simple menu. Kdenlive packages are freely available for GNU/Linux, FreeBSD and Mac OS X under the terms of GNU General Public License version 2 or any version later.
I usually edit short videos from my life like play with kids, travel and bike rides, and sometimes do software project demos and tutorials. I tried all major tools in linux for video editing. Blender seems to be the most feature rich and consistent. It allows me to handle 4k video on my oldish laptop. It always feels so good that I buy its future for 20-50 bucks time to time. See More
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
This is an editor specialized on DV files. All other kinds of video are converted to DV, using a lot of time. I tried to import an m2ts of about 130 MB and it tooks more than 5 minutes. Just imagine how much time you would need with GB files… Not to mention the doubled (or more) disk space. After that, it jups to the end of the clip, exactly like Cinelerra. Unusable for me.