Category: Video

Video Editor in Linux KDEnlive

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By , May 27, 2014 14:52

Kdenlive 0.9.6

Aspettiamo con ansia la versione 1!

Ha superato il test nella creazione basica di video amatoriali.

Unico Software video a permettere l’integrazione dei metadati all’interno dei file ogg.

Spero si specializzi nei formati liberi, cosí da diventare concorrenziale a livello professionale.

Devo ammettere che la gran parte delle volte che il software crasha é per un mio errore, o incaponimento nell’uso  inappropriato di immagini png e jpg.

Adatto alla creazione di brevi clips, ha retto un rendering di 6:30 di video con 4 tracce videoo, animazione frame by frame con png sequence, ogni livello ridimensionato e color corrected, con 20 minuti di rendering.

Niente male!

Un cruccio che ci siamo portati appresso era l’impossibilitá nelle versioni precedenti di fare “reverse speed” che ora é un effetto disponibile per far girare il video al contrario.

Metadata e archivistica

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By , November 6, 2013 14:53

Arkiwi é un archivio Audio/Video che si basa sui metadata per mostrare le informazioni dei files. Le Metatag sono informazioni riguardo il contenuto come il titolo o l’autore del brano che vengono incorporate direttamente nel file. Il sistema dei metatag viene usato comunemente per gli audio player, ad esempio il titolo metatag viene visualizzato nei players, in mancanza di cui si legge il nome del file che spesso é oltretutto impresentabile perché scritto in maniera criptica o autoreferenziale come “oei_11.ogg”. Nella messa in onda da una webradio i metatag diventano ancora piú importanti, visto che la selezione musicale viene ascoltata da persone che non sanno il nome di ció che ascoltano, l’ignoto ascoltatore legge: oei_11.ogg e spreca un secondo a cercare di decifrare. Se si fosse usato il campo Titolo dei Metatag “Otra Europa Info 11”, il display avrebbe mostrato il nome corretto e comprensibile, inoltre é estremamente comodo per il DJ poter leggere informazioni riguardo il brano direttamente da dentro il software di riproduzione musicale. Continue reading 'Metadata e archivistica'»

HTML5 Video

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By , November 26, 2012 17:00

So, here we are, with the hope to kill Adobe flash player from our carrier.

The only chance ATM (at the moment) is HTML5 video embed.

the compatibility does not seem to be so good:

  • MP4 opera 10.6 does not support this format
  • OGG/OGV  explorer 9 and safari 5 do not support
  • webM explorer 9 and safari 5 do not support

WTF!!! we can anyway integrate all 3 formats::

  • .mp4 = H.264 + AAC
  • .ogg/.ogv = Theora + Vorbis
  • .webm = VP8 + Vorbis

<video poster=”immagine.jpg”>
<source src=”esempio.ogv” type=”video/ogg “>
<source src=”esempio.mp4″ type=”video/mp4″>
<source src=”esempio.webm” type=”video/webm”>
<p>this text will be visualized if the browser do not support HTML5. Download the video <a href=”esempio.webm”>here</a>.

</p>
</video>

You can also insert controls command inside the VIDEO tag

controls adds a default video control overlay;

width and height: dimensions with preload:

start the video download in autorun or not with preload=”none”
u stop it specify a codec inside the SOURCE tag

<video autoplay=“autoplay” loop=“loop” controls=“controls” tabindex=“0” preload>

<source src=”movie.webm” type=’video/webm; codecs=”vp8, vorbis”‘ />

<video>

 VIDEO + JS
explorer 8 does not read the tags, there are some ways to add theme in js:
<script type="text/javascript">
document.createElement('header');
document.createElement('footer');
document.createElement('section');
document.createElement('aside');
document.createElement('nav');
document.createElement('article');
</script>
or  use the already done files used in the file html5.js
For an even better compatibility with Flashplayer < 10 the fallback flash object requires flv file, not mp4.

Linkografy

http://it.wikipedia.org/wiki/HTML5_video

http://www.w3schools.com/html/html5_video.asp

http://www.html5rocks.com/en/tutorials/video/basics/

http://www.youtube.com/html5

http://www.html.it/articoli/il-tag-video-di-html5/

http://thewebthought.blogspot.com/2011/04/html5-and-internet-explorer-8-not-good.html

codecs="vp8, vorbis"

Arduino + Touchscreen!

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By , June 27, 2012 19:41

The arduino touchscreen shield by watterott.com :: URL? is great fun. TKilla built:

  • MIDI Controller for VJing and Audio-Studio
  • PONGuino-touch – 2 player touchscreen game
  • PC remote control with mouse- and keyboard- econtrol, VLC mediaplayer control,…
  • various tests/demos

Infos, Code, Videos & more pictures coming soon

MirrorBot Video – Moving Projections Controller Interface

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By , January 5, 2011 17:58

YouTube Preview Image

Part #02 of the MirrorBot Demo Video


** Video Installation Audio Visual Special Event n8 @Tacheles 17.12.2010

** Details of the Controller device:

  • Programs and Live Mode LCD screen interface

Part #01 of the Video, Installation in MIKZ, Berlin 03.2010: /2011/01/03/mirrorbot-video-moving-projections-in-action

Technical details: lab.synoptx.net/mirrorbot

Chaos Computer Congress Mirror – Videos of CCC Talks

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By , January 5, 2011 08:07

There was some disc space free on a server and so we collected CCC Congress videos of the last years:

You can watch the talks directly in the brower

or start a player-program like vlc or mplayer with the http:// url

or download the file with “save as..”

Blender video editor

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By , December 21, 2010 02:56

I m producing a video in Blender so thats my live report, this tutorial will be corrected and make it bigger in the future.

WORKSPACE

To start lets enter in the windows setup for video editing: drop down menu and choose the number 4th : SEQUENCE

Strange that Blender dont use the standard names, like footage or clip, using strip instead.

blender video add fxEFFECTS

Select the strips you want to apply the effect to and press spacebar to see appear the menu, then click on

[ADD] -> effect -> Add

That will create a strip that is your effect, with the length of the strips intersection, right above the selected video strips,

move the mouse around to decide on witch level is positioned.

The effects strip can be resized like any other video strip.

Frequently unfortunally is not possible to add an fx contemporary on 3 strips or more, only 2 strips are aloud.

But there are many effects possibilities and each effect has different setup.

TRANSITIONS

“FADE IN / FADE OUT”
To fade is not so intuitive, but give you the possibility to fade not only to black or white as normal video editor, you choose the background color, so at first
You can use it for fade in and fade out between to clips, ehm Strips in Blender terms, Fade from a strip the first selected to the other, the last selected

Gamma Cross

Add Sequence Strip

select the clips and press (spacebar) -> Gamma Cross

Now you ll need to add a efx strip called
[ Color Generator ]
and then Setup the sequence strip

Color Generator fills the frame with whatever color you select (via a color picker in the buttons window). You can make it black, put it in a channel over your video strip, then select both strips and add a Cross on top of them to dissolve between your strip and the Color Generator. (http://www.thriceberg.com/2010/02/09/editing-with-blenders-vse/)

SHORTCUTs
Remember that the standards shortcut are the first Letter of the action you need.
Frequently in Blender the commands are compressed into 1 shortcut, and not into two different actions.

a -.-.-. it means ALL
select / deselect all clips
In this case what happen clicking A it depends if the strip is already selected or not.

G .-.-..- grab move
move the selected files
for example to move all the strips together: (a) then (g)

C.-.-.-. copy
copy that automatically paste

K is CUT HARD
pratically KUT! coming back on the idea that normally the first letter of a command is a shortcut, is not always like that, but in this case nothing is better then K shortcut, when C is copy combined with CTRL,

mouse usage:
the mouse is sensible to dynamic that means that you click and move the mouse to activate some actions
right click hold press + mouse move it means G (grab / move)

TEXT editing
Drop down menu to enter in model windows setup

ADD (Spacebar) -> text
and then edit Mode to change the text

(http://wiki.blender.org/index.php/Doc:Manual/Modeling/Text)
(http://de.wikibooks.org/wiki/Blender_Dokumentation:_Text)

Rendering FRAMES
press [Render] then press F3 save jpg as

RENDERING VIDEO

“…

In order to render the videos, you have to select the [Do sequence] option right below the [ANIM] in the Scene (F10) menu. The output file(s)

will create in the directory set in the first box of the output group.

By default, blender will render each frame into a separate jpg file, but the output could also be an avi file. To do this, you chose AVI codec in the drop-down list of the format group. In this case, the name of the output avi file will be taken from the text entered in the output box.

For instance, if it says C:\Users\Render\test the output file will be named test0001-0250.avi and created in C:\Users\Render. 0001-0250 reflects the frame range, which of course can be also modified by just entering the desired values for the start and end frames of the animation.

…” ( http://codeanticode.wordpress.com/2008/04/13/using-blender-for-video-editing/ )

Software Freedom Day 18.09.2010 E-Lok Berlin

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By , September 17, 2010 02:17
Flyer Software Freedom Day 2010 Berlin

Flyer Software Freedom Day 2010 Berlin

LinuxWorks!

ist Gastgeber zum diesjährigen

Software Freedom Day

Der “Software Freedom Day” ist eine jährliche, weltweite Veranstaltung um Freie Software zu präsentieren und den Dialog zwischen deren Nutzern und Entwicklern zu fördern.

In Berlin wird dazu dieses Jahr ein Vielzahl von Ausstellern zusammen kommen. Neben Vorträgen und Infoständen wird somit ein Fest organisiert, das den Teinehmenden bis spät in die Nacht Gelegenheit zum gemeinsamen Austausch und zum Kennenlernen bietet.

Die Organisation erfolgt offen im Wiki:

linuxwiki.de/SFD2010

Headsquatter Live Visuals .: Suppe+Mucke & Suchtfaktor 4.9.’10

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By , September 4, 2010 14:22

Today the Headsquatter.org VJ crew plays two live video performances with multiple projections

Suppe+Mucke Strassenfest

Moving projections at Drachenspielplatz Schreinerstrasse or in Samariterstrasse – 20h-22h

-.

.-

Suchtfaktor Party @MIKZ

Minimal electro 23:59h – late

-.

.-

headsquatter.org

youtube.com/headsquatter

myspace.com/headsquatter

Come, have a look!

Viper Video Editor Review

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By , August 15, 2010 19:24

Kollege Helmchyn programmed a video editor in python: VIPER

It uses mplayer and mencoder to play and encode videoclips. this way, it reads almost every video codec and can create various outputs. The frontend is programmed in Python and TK GUI-lib. you can combine multiple videoclips in a timeline and select their length and in/out points.  it plays all those clips in preview windows – very nice TK video widget!

so far the interface is not complete and there are no effects or transitions built in. if you know mencoder/mplayer options, you can put your own filters by specifying  command-line parameters. i like the timeline, but there are no multiple layers and its not so easy to define the length and start/end points of the clips without seeing at which frames they will cut.

the export works very well and the dialog gives useful hints on the codecs and encoding options. It is already stable and you can use all functions of the interface.

this software is specially interesting for me, because i want a VJ player in python with mplayer, to trigger clips live on parties..  i go investigate the source code… 🙂

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