Bloggkollegan Little John släpper i rask takt nästa del om ljudprogrammet Audacity. Läs!

Och du, om du tycker att han skriver lite konstigt ibland, ska du veta att gubben är tysk från början. Han skriver i alla fall på svenska hundra gånger bättre än jag skriver på tyska.

Läs även andra bloggares åsikter om Audacity, ljud, inspelning, mp3, ogg, fri mjukvara, öppen källkod

Yo soy una de esas personas que de vez en cuando todavia sigue comprando discos. Soy de esas personas que todavia le gusta pasar un tiempo en la disqueria buscando o eligiendo que poder llevar. Como suelo hacer eso muchas veces tengo que comprimir el audio de esos cd’s para poder llevarlos en mi reproductor de mp3. Pues bien, aca vamos a ver como instalar el codificador de mp3 y una pequeña herramienta que nos va a permitir comprimirlos temas.

Primero vamos a instalar el programa que va a codificar nuestro audio. El programa se llama LAME y se puede descargar directamente desde su sito:

http://sourceforge.net/projects/lame/files/lame/

Descargamos el archivo .tar.gz, lo descomprimimos de la siguiente manera:

tar -zxvf lame.tar.gz

Y luego vamos al directorio que creó al descomprimirlo e instalamos la aplicación:

./configure && make && make install

Con esto vamos a tener el ejecutable del encoder en /usr/local/bin/lame. Es esta ruta la que vamos a usar para configurador nuestro programa de compresión.

Ahora vamos a instalar el programa que vamos a utilizar para comprimir el audio. El programa se llama RipperX, es bastante sencillo de utilizar y puede comprimir en formatos mp3 (con bitrates variables o no) y Ogg. Para instalarlo podemos descargar el programa desde la página:

http://sourceforge.net/projects/ripperx/

Y hacer el mismo procedimiento que cuando instalamos el LAME, o sea, descomprimirlo y luego ejecutar el script de instalación. O simplemente hacer:

apitude update && aptitude install ripperx

Una vez hecho esto vamos a poder ejecutar nuestro ripeador. La pantalla principal es bastante sencilla, vamos a tener varios botones (configuración, cddb, etc), la lista de los tracks y si queremos comprimirlo o solo rippear.

En la solapa “General” es donde vamos a poner donde se van a alojar nuestros archivos una vez que sean rippeados o comprimidos.

Configuración - Solapa General

En la configuración, el la solapa “mp3″ podemos elegir que método y que usaremos para comprimir nuestros temas.

Ahora ya podemos empezar a comprimir nuestros cd’s y llevar los archivos mp3 u ogg a donde queramos.

Non so perche’ vogliate fare una cosa del genere, ma se proprio volete convertire un file Matroska in un formato AVI potete usare mencoder. Vediamo come.

Prima di tutto vediamo cosa sono questi file Matroska. Possiamo averne di tre tipi: MKV (video), MKA (audio) e MKS (sottotitoli), per crearli viene utilizzato l’EBML. Si tratta di un buon formato, anche se puo’ dare qualche problemino con alcuni riproduttori di video, ma questo e’ un problema dei riproduttori (o lettori) e non del formato del file. Comunque, ipotizziamo ci sia un buon motivo dietro il vostro desiderio di convertire il vostro bel video MKV in un altro formato. Per prima cosa dovete sapere in quale formato convertire, vediamone due.

Se volete convertire da Matroska a Xvid dovete dare questo comando:
$ mencoder INPUT.mkv -ofps 25 -ovc xvid -oac mp3lame -lameopts abr:br=192 -srate 48000 -xvidencopts fixed_quant=4 -vf scale -zoom -xy 720 -o OUTPUT.avi
analizzare ogni singola opzione sarebbe lungo e per voi inutile, andatevi dunque a leggere la guida di mencoder. Vi dico solo che l’opzione xvidencopts fixed_quant indica la qualita’ (3 buona qualita’ ma meno compressione, 5 bassa qualita’ alta compressione), 4 e’ una buona via di mezzo. Se non ne siete soddisfatti potete sempre ripetere il comando cambiando i valori.

Potete anche convertire il vostro file MKV in formato DivX 5, con questo comando:
$ mencoder INPUT.mkv -o OUTPUT.avi -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=700:vpass=1 -ffourcc DIVX50 -oac mp3lame -vf scale -zoom -xy 720

E’ comunque consigliabile, laddove possibile, il formato Xvid rispetto al DivX, per varie ragioni.

Se doveste avere (come accade spesso) un file MKV con due tracce audio, allora dovete aggiungere una o piu’ opzioni per indicare quale utilizzare. Ma prima di tutto dovete individuare la traccia audio che vi interessa, per farlo date questo comando:
$ mplayer -v INPUT.mkv
leggete e cercate qualcosa del genere:

[...]
...  -aid N, -alang LNG
...  -aid N, -alang LNG
[...]

dove al posto di N c’e’ un numero e al posto di LNG c’e’ la lingua, ad esempio -aid 1, -alang ita e -aid 2, -alang eng. Ora avete tutto quello che vi serve. Il comando per creare un file in Xvid con la traccia audio in italiano sara’ dunque (stando all’esempio):
$ mencoder INPUT.mkv -ofps 25 -ovc xvid -oac mp3lame -lameopts abr:br=128 -srate 48000 -vf scale -zoom -xy 720 -xvidencopts fixed_quant=4 -aid 1 -alang ita -o OUTPUT.avi

Certe volte (a seconda del formato audio) ci potrebbero essere problemi ad utilizzare questo sistema. In questi casi ci viene in aiuto mkvtoolnix. Essendo pacchettizzato, per installarlo sulla nostra Debian facciamo cosi’:
# apt-get install mkvtoolnix
il tool contiene varie applicazioni, tra cui mkvmerge, mkvinfo e mkvextract. Quella che fa al caso nostro e’ mkvextract, leggiamoci dunque la guida, che ci suggerisce la seguente procedura.

Prima di tutto dobbiamo identificare le tracce audio (e gli eventuali sottotitoli):
$ mkvmerge -i movie.mkv
che ad esempio ci restituisce questo output:

File ’movie.mkv’: container: Matroska
Track ID 1: video (V_MS/VFW/FOURCC, DIV3)
Track ID 2: audio (A_MPEG/L3)
Track ID 3: audio (A_VORBIS)
Track ID 4: subtitles (S_TEXT/UTF8)
Track ID 5: subtitles (S_TEXT/UTF8)

Come vedete la traccia 2 e’ un formato audio MP3, la traccia 3 e’ un formato audio OGG e poi abbiamo i due sottotitoli. Se vogliamo la seconda traccia audio e i secondi sottotitoli, allora diamo questo comando:
$ mkvextract tracks movie.mkv 2:audio.mp3 5:subtitles.srt

Ora potete usare ffmpeg sul file MKV per estrarre solo il video:
$ ffmpeg -i INPUT.mkv -an -vcodec copy -y OUTPUT.mkv
e poi convertite con mencoder usando l’opzione audiofile per indicargli il file audio esterno (che abbiamo estratto con mkvextract):
$ mencoder INPUT.mkv -ofps 25 -ovc xvid -oac mp3lame -lameopts abr:br=192 -srate 48000 -xvidencopts fixed_quant=4 -vf scale -zoom -xy 720 -audiofile audio.mp3 -o OUTPUT.avi

Adesso avete il vostro bel file video in formato AVI XviD riproducibile nei piu’ normali lettori. Se siete estimatori delle lingue originali, ma non le conoscete e volete i sottotitoli, basta inserirli nella stessa directory del file video. Generalmente per far si che il lettore li legga basta che file video e sottotitoli abbiano lo stesso nome (solo l’estensione diversa). Ad esempio: Filmstrepitoso.avi e Filmstrepitoso.srt. Puo’ pero’ capitare che ci siano lettori che non leggono i sottotitoli . Allora dovete inserirli nel file video, in questo modo:
$ mencoder -ovc xvid -xvidencopts fixed_quant=4 -oac copy -sub Filmstrepitoso.srt -subfont-text-scale 4 -o Filmstrepitosoconsottotitoli.avi Filmstrepitoso.avi

Fatto, ora potete godervi il vostro film con i sottotitoli anche nel piu’ scadente dei lettori.

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Finally I found a solution for the segmentation fault, that occurred when I tried to process ogg (and sometimes mp3) files with Picard. It’s a reply to the bug report and all I had to do, was insert the repo and upgrade my picard. Now scanning works.

View Sonic, a manufacturer and provider of visual technology, has introduced its new VPD 400 MovieBook, all-in-one portable entertainment player that enables users to watch HD movies, listen to music, view photo albums, read digital books or even record voice memos at a very affordable price.

 Stylish and ultra thin Viewsonic VD400 comes with 4.3-inch screen (800 x 480), larger screen format with HD 720p. It has wide range of video, photo and audio format compatibilities, which includes JPEG, BMP, PNG, GIF, AVI, RM/RMVB, FLV, MP4, MOV, PMP, MPG, VOD, DAT, H.264, H.263, MP3, WMA, WAV, FLAC, APE, OGG

 The device comes with internal memory (NAND Flash Memory) of 8GB. In addition, Viewsonic VPD400 also supports micro SD cards slot for expandable storage.

 The VD400 has long battery life (1800mAH Li-Ion), which supports playback of up to 12 hours (audio), 6 hours (video), and 3 hours HD video on a single charge. The device weighs only 0.3 lb. (140 g).

 The VPD400 MovieBook is compatible with Windows® 98/2000/SE/ME/XP/Vista and available at a price tag of $129.99.

 The firstreporter

OGG to Audio Box is the thing you must have if you want to be the master of your music collection. Now you can convert any song to another size, get rid of your bulky CDs lying everywhere, convert chanels (stereo to mono), change bitrate or frequancy most easily. It is the fastest and most affordable solution currently available on the market. All formats of MP3, WAV, OGG, WMA, AAC, Real Audio, FLAC, MPP, APE files that could not be supported by other converters Audio Converter is sure to recognize and support. OGG to Audio Box supports ID3 Tags and converts tracks on the fly, without creating intermediary wav files. High converting speed will not allow the process bore you. With Total Audio Converter you can easily convert files in batches. Besides all this OGG to Audio Box will play all files of these media types for you or shut down your computer automatically when all done.
Digitize your audio recordings and edit them in various formats such as MP3, CD, CDA, CD-R, DVD-Audio, AAC, AC3, ID3, M3U, M4A, M4P, MP3 ID3 Tag, OGG, RA, WAV, WMA, MP2, APE, VQF, MPC, AMR, Midi, WAVE, and RM file.

On November 17^th, the Ottawa Geotechnical Group (OGG) is having a very interesting lunch presentation. The talk titled Water Related Excavation Problems for Amphitheatres in Quebec City will be given by Professor Robert Chapuis, a professor from École Polytechnique de Montréal. To attend this event you must RSVP to OGGtreasurer@hotmail.com by noon on Friday, November 13, 2009. Additional details can be downloaded from the “files” section on the right hand side of this page.

• Date: Tuesday, November 17, 2009
• Time: 11:45 am: Registration, 12:00 pm: Lunch (Hot Buffet), 12:45 pm: Presentation
• Location: Hellenic Community Centre, 1315 Prince of Wales Drive, Ottawa, Ontario
• Admission: $10 for students (pay at door)
• Abstract: Two public amphitheatres were built in 1982 in Québec City. Their foundations required excavation in uncontrolled backfill materials along the St-Lawrence River. Old wooden wharfs were known to have been buried in backfill materials, and thus a large water inflow was expected to occur there and to depend on tide levels. An impressive pumping system was used. The pumped flow rate reached 114 m3/min at the highest tide. The origins of these water inflows were determined with the help of old drawings, boreholes, water tests and tracer tests. Most pumped water was coming through cobbles and boulders backfilled around a sewer pipe 2.1 m in diameter. This presentation will describe the work carried out to control the exceptional water inflows in order to complete the foundation and structure within the required schedule.

Want to backup your audio CD collection to your computer? Ripping CDs enable you to store your favorite music into a scratch free medium. It also helps you to share it among various media players in your network.

Before we start we need to understand few basics about ripping and AudioCD. Usually AudioCDs store music in .wav format. It is a format which doesnot compress the file hence occupies a lot space. Thats why Audio Cds have only 12 or 15 songs. When ripping we convert .wav format into mp3 or ogg format. These formats compress the music files down to 5 to 6 MB and enable you to store them in hard disk or copy to your iPod.

Ripping  = music.wav –> music.mp3 or music.ogg

mp3 vs ogg

There are very many technical difference’s between ogg format and mp3 format and i am not going to deal with it here. Essentially mp3 is proprietary and ogg is free.There is no much difference between these formats when you listen to it.

KDE

Using Dolphin/Konqueror

Simplest way to rip CDs in KDE is Type Audiocd:/ in the file manger. It opens up a music cd directly.it would create meta directories for mp3. ogg, etc. From there, all youhave  to do is open whichever directory and then “drag and drop” my songs to another location and it would rip it. So simple. No installation .

Using K3B

K3b is the default burning application in KDE. So it comes preinstalled in the operating system.

1. Insert Audio CD
2. Open K3B
3. Goto Tools
4. Select Rip Audio Cd
5. Select the format you want to rip to and also the folders
6. Start Ripping!

There are several other packages like KAudioCD Creator and Audex.. Try these if you are not satisfied with above tools.

Gnome

Grip

Grip is a cd-player and cd-ripper for the Gnome desktop. It has the ripping capabilities of cdparanoia builtin, but can also use external rippers (such as cdda2wav). It also provides an automated frontend for MP3 (and other audio format). I haven’t tried it. So for documentation try this link

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TIKLA

Primeros pasos con Ogg

Cada vez más compañías de software propietario como Microsoft, Apple y Adobe están empujando a formatos de vídeo y de audio que restringen el acceso y restringir los desarrolladores de software, pero no es una alternativa que se puede reproducir en todos los equipos sin restricción – Ogg. Ogg ofrece formatos multimedia de calidad profesional. Ogg es ampliamente utilizado por los proyectos de software libre, artistas y un número cada vez mayor de la música y los distribuidores de vídeo.

Mas Informacion http://www.fsf.org/resources/formats/playogg

Siempre es difícil tomar decisiones, algunas veces no tanto y aprovechando que este blog no lleva demasiado tiempo y no tengo demasiado contenido multimedia, tomar una decisión no es tan difícil, así que he decidido que todo lo subido aquí tendran formatos libres, tanto imágenes como vídeos, documentos, etc, se que no es algo demasiado novedoso, pero aprovechando que firefox y chromium soportan videos ogg, y que encontré una pagina que hospeda vídeos en este formato, me desharé de los videos en flash, y todo quedara en ogg,  no se puede reproducir directamente desde el blog, pero se abrirá en otra pagina , si usan un navegador que no soporte ogg, pueden descargar los videos y verlos en su reproductor favorito, ademas la calidad de la imagen es muy superior a la de verlos con algún reproductor flash.

No hay demasiados videos, solo uno, pero sera una decisión para el futuro, espero lo entiendan y muchas gracias por todo.

Si a alguien mas le interesa, pueden ver una lista de formatos libres aquí. Saludos a todos

XaBz

オープンソースの技術を心から支持している私たちは、Firefox が新しい HTML の動画タグにこの夏から対応し始めたことにとても喜んでいました。この技術は将来のオンライン動画を根本的に変貌させる可能性を秘めている思っています。

動画タグへの全面対応は現在まだ作業の途中です。しかし、既にアップロードされている動画はすべて（通常の mp4 形式に加え）Theora/Ogg 形式でのエンコードが完了しました ! VideoPress* ユーザーは、メディアライブラリから Ogg ファイルの URL を取得できるようになっており、これらの動画は Firefox 3.5や Chrome などの HTML 5対応ブラウザから直接再生できます。

Firefox 3.5 でサンプル動画をご覧ください。

* VideoPress を使えば、HD クオリティの動画を挿入できます。

この記事は Hailin が WordPress.com 英語版ブログに投稿した「VideoPress Supports Ogg」の訳です。本文内のリンクはすべて英語です。

Fervorosos defensores de tecnologias de código aberto que somos, ficámos muito contentes quando o Firefox começou a suportar o novo tag HTML de vídeo no verão passado. Ele tem o potencial para transformar o futuro do vídeo online.

Enquanto ainda estamos a trabalhar para suportar completamente o novo tag de vídeo, é com muito prazer que anunciamos que temos já codificado todo o nosso inventário em formato Theora/Ogg, além do habitual mp4. Os utilizadores de Videopress podem aceder à URL do arquivo Ogg na biblioteca de mídia e o vídeo pode ser reproduzido directamente em browsers que suportem HTML 5, como o Firefox 3.5 e o Chrome. Tente abrir este vídeo com Firefox 3.5!

* Lembre-se que pode reproduzir vídeos de qualidade HD no seu blog usando o VideoPress.

The phone rings. LOUD. It’s from the nearest cubicle. Nobody answers. It’s LOUD. I’m working on something that requires long and constant atten- LOUD -tion.  The phone stops ringing, and the colleagues’ voices return to be distracting again. There’s an informal meeting a handful of seats from me; I’m happy for them that they’re laughing, but I’m afraid the software bug I’m hunting will take the time to hide himself deeper while I’m not looking.

I think that some of you may relate to my experience. Actually, I’m sure. The greatest source of distraction for me is noise, sounds and voices; if you are like me, you will like this lecture about sound on TED:

Julian Treasure: the 4 ways sound affects us

Quoting his presentation, open plan office: productivity loss = 66%. Mr.Treasure also stresses the importance of the positive effect that some sounds have on us, even on an instinctive level; I decided to give the “birdsong therapy” a try at the office. I started searching for sounds to use, and I stumbled upon this social and free database of sounds:

The Freesound Project

Basically every user can contribute to add sounds that can be used freely as Creative Commons. The site has tons of different ambient captures of birdsong. I enjoyed very much, and found suitable for my situation, this 42 minutes long recording of birds. The file’s format is wav, and this means that the size is unnecessarily big. In order to compress the sound on my Ubuntu Linux computer, I used a context-menu driven utility for sound conversion that is a Nautilus add-on. You can install it with:

sudo apt-get install nautilus-script-audio-convert

With this utility I compressed the 420MB wav file into a 63MB good quality OGG/Vorbis audio file (Vorbis is a free open source encoding algorithm). The last problem is that at the office I have a Windows XP box, and I need a player that reads ogg files. For this reason I decided to install the codecs for Windows Media Player:

DirectShow filters – play back ogg files in Media Player

The next day I copied the birdsong inside my workstation, installed the codec, put on my headphones and jumped into the nature. It worked, somehow. The noise of the office was still present, but more distant and subdued under the melody of the forest. In order to completely annihilate the auditory pollution, I feel that classic orchestral music is more appropriate, since it gives a harmonic background covering everything else.

Give it a try: it won’t cost you a penny and it could greatly improve your productivity.