TheJoe.it Into the (open) source

17Jun/132

Cut a section of video with ffmpeg

shell

Today's article purpose is to be a reference for those who want cut a video from one point to another with ffmpeg ( then using the terminal). Strange, true? To change what products we use highly graphical far more graphics you can imagine.

Often the video is too long to be cut, and a full program (with gui and all) consumes too many resources and slows down the system.

The syntax is very simple, in a single line of terminal

6Apr/130

Extract the audio track from a video “ffmpeg”

shell

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.

18Jul/122

Slow down a video “mencoder”, “ffmpeg” and “sox”

video

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.

10Jul/123

Photography: “time lapse” con gPhoto2

20d_time_lapse

Today I raised the issue of "time lapse", a particular photographic technique that through the sequence of shots allows the creation of small animations. To get an idea of ​​what the time lapse, I refer you to spectacular video easily available on youtube, or rather those dedicated of this page.

For the good time lapse is necessary to automate the process of shooting, in practice less personal things are entrusted to the skill, the better the end result.

12Jun/124

I TV plasma Panasonic “S30″ are no longer updated, video encoding for the correct TV “ffmpeg”

panasonic

My new TV is a Panasonic Viera Plasma series "S30", generation (I would rather penultimate generation). Has the ability to connect to the internet, function that allows me through a few applications developed "ad hoc" of see the trailer movies currently in theaters, unload (paying) the latest movies and watch streaming, listen to internet radio in streaming, See Youtube videos, accessing Facebook and Picasa, download a feed updated in real time with the day's news in video format. In short, the applications are wasted.

8May/100

We change the “Hz” with ffmpeg

ffmpeg

Some article ago I've had to adapt the mp3 to playing on the web. The flash player unfortunately only support sampling 44.100Hz, but I have always recorded my songs to a higher quality: 48.000Hz.

I tried some small programs with graphical interface, but I had to resign to the use of command line (in some cases it is almost essential). To convert my mp3s I used "ffmpeg", doubtless "the" program for multimedia on GNU / Linux.