Whole an article in the 2013 that was the subject of stabilization of shaky videos.
Notwithstanding that the best outcome would be to use one stabilizer physical (a simple grip with a weight at the lower end) or a accelerometer solidarity (there are those who have made a kinect).
Also in this case we will use Transcode, so if we have not installed it will be necessary to do so:
Let's say you have a video from which we extract an audio track. The reasons may be the most varied, we might want to save a special effect in a movie (shot, outbreak, d'atmosphere song, famous phrase, etc.), or part of a song, the possibilities are endless.
Today let's see how you do with ffmpeg, the usual command-line tool that always shot at stake for encode video, slow them down, adapt them to my TV and more.
Set up a Security Webcam with "motion detect" using linux, in contrast to other solutions, is a procedure quite simple, despite the lack of a GUI for the configurations (often it is good not to have a GUI). On the front "hardware" everything we need is a webcam USB, regarding the software we will need a Linux distribution and the program "motion" (in the official repositories). Below I translate and I simplify the procedure comes from the blog Chriswpage.com.
Today we still talk about video editing command line, ffmpeg as well as we will see in broad terms how they work mencoder and sox: is the first part of the project "mplayer", the second helps us in defining audio. The end result of this tutorial will be the original video (including audio) slowed. In short will last twice.
To begin with we must have a video format "mp4". If we use our size differs ffmpeg by convertirlo.