Códecs de vídeo: ventajas y desventajas de los diferentes tipos


 | http://bitelia.com

Después de la Guía básica sobre contenedores, códecs y formatos de video, surgían las preguntas por las diferencias entre los tipos de códecs, o por lo menos entre los más populares. Obviamente no necesitarán esto por ejemplo si usan un programa como VLC para reproducir videos, que ya resuelve perfectamente el problema de los códecs, pero nunca está de más un poco de información para saber cómo se comprimió o qué calidad tiene lo que nos estamos descargando.

Recordemos que un códec es una pieza de software que se dedica a codificar y decodificar una señal de datos digital. Los archivos de video sin compresión ocupan mucho espacio, y por eso es necesario algo que los comprima para reducir su tamaño y que sean manejables. La información se comprime en el momento de guardarla en un archivo y se descomprime en tiempo real durante la visualización.

Normalmente los algoritmos de compresión que se emplean conllevan cierta pérdida de de datos, por lo que el objetivo es lograr la calidad más fiel al original posible produciendo un archivo lo más pequeño posible.

Hay varios tipos de códecs de video disponibles. Cada uno de ellos ha sido implementado por diferentes compañías y tiene su propio algoritmo. Tienen distintas especificaciones y su aplicación se extiende a distintos campos. Generalmente se adaptan a los standards de la industria.

Se diferencian en general por varios factores, como la tecnología usada para la compresión o el algoritmo, la plataforma que los soporta, el sistema operativo en el que corren, entre otros.

Los códecs que provocan pérdida de información para conseguir un tamaño de archivo reducido son llamados lossy. Hay códecs sin pérdida pero por lo general no vale la pena un aumento considerable del tamaño del archivo por un cambio imperceptible en la calidad del video.

Algunas características de los códecs más usados (…) Leer más “Códecs de vídeo: ventajas y desventajas de los diferentes tipos”

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Popcorn Popping In Super Slow Motion (VIDEO)


huffingtonpost.com

Feel like relaxing? Enjoy this slow motion video of popcorn popping. When it comes to food videos, slow motionseems to make everything look so much cooler. Maybe that’s a hint that we should stop and appreciate what we’re eating a bit more. Or maybe now we just really want some popcorn.[Via: Laughing Squid]

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Video Pick: Best Tips to Work Better, Not Harder


http://freelanceswitch.com

View engaging conference lectures, interesting how to discussions, and high quality freelance advice via video here on FreelanceSwitch.

This week we look at Best Tips to Work Better, Not Harder byLifehacker. In this video Adam Dachis and Adam Pash show us how to improve our freelance office setup, with ergonomic setup advice, cable management hacks, and processes for sinking your laptop and mobile phones. There’s more tips in this episode, including a hack on how to save money at Starbucks while getting the same caffeine buzz. Leer más “Video Pick: Best Tips to Work Better, Not Harder”

“I’m Feeling Lucky” button launched last year | Improving video awesomeness with one click

This breakthrough in video awesomeness is possible thanks to our research team who expanded on the “I’m Feeling Lucky” button launched last year, automatically detecting if stabilization or color correction would be helpful for you. The result is a one-click option rolling out over the next few days that cures these two symptoms now, and more planned in the future.

So you keep capturing those awesome moments, and we’ll keep on ways to help you make those videos even more awesome.


http://youtube-global.blogspot.com.ar/

Whether you’re perfecting your double backflip at the park, capturing a flash mob on your phone, or enjoying singing in a subway, it’s not easy to get your video quality perfect. Sometimes videos suffer from symptoms like “shaky-camera-itis” or “augmented-darkness-levels” that keep viewers from seeing just how awesome your video really is. We made a big step last year with the YouTube Video Editor, and now we’re adding a feature that does the work of curing these symptoms for you.

If you uploada video that’s shaky or dark, we’ll automatically offer to fix it for you, creating an updated version of your video on YouTube.When you upload a video that could use a fixup, you’ll see a notification bar on the Upload page and in your Video Manager. Click the button to fix it, and you’ll see a side by side preview to decide if you want to accept the edits.

Select “Okay” if you’d like us to update your video to the preview version (you can always undo this later). Even if you’re uploading a video from your mobile device, the Video Manager on the desktop will give you a notice if this video can be cured as well. Here’s an overview: Leer más ““I’m Feeling Lucky” button launched last year | Improving video awesomeness with one click”

Apple’s Siri May Soon Speak Japanese, Work On iPad 3 (RUMOR)

Apple says Siri will add Japanese, Chinese, Spanish, Korean and Italian this year, but this “outing” is leading many to speculate that the Japanese capability will come very soon.

And that’s not all. On Tuesday, SlashGear reported that Siri may be available on the iPad 3, which is expected to be released on March 7.

The speculation comes from a new token that Apple has added to Siri rendering the application inoperable on devices other than the iPhone 4S. According to Apple, the app “works exclusively on iPhone 4S,” but many have jailbroken their iPhone and iPad devices to allow Siri to work. (Check out idownloadblog.com for a detailed reportabout the token.)


http://www.huffingtonpost.com
Siri Update

Siri’s got a big mouth.

The Apple news blog 9to5mac reportsthat Apple’s virtual assistant, which currently supports German, French and English, may inadvertently be outing herself as a Japanese speaker.

Indeed, when we asked Siri what languages she spoke, she told us she speaks “English, French, German and Japanese … so far,” and reminded us that we can change the language in the app’s settings. But there is no option there to switch it to Japanese.

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Apple says Siri will add Japanese, Chinese, Spanish, Korean and Italian this year, but this “outing” is leading many to speculate that the Japanese capability will come very soon.

And that’s not all. On Tuesday, SlashGear reported that Siri may be available on the iPad 3, which is expected to be released on March 7.

The speculation comes from a new token that Apple has added to Siri rendering the application inoperable on devices other than the iPhone 4SAccording to Apple, the app “works exclusively on iPhone 4S,” but many have jailbroken their iPhone and iPad devices to allow Siri to work. (Check out idownloadblog.com for a detailed reportabout the token.) Leer más “Apple’s Siri May Soon Speak Japanese, Work On iPad 3 (RUMOR)”

Internet 2010 in numbers

http://royal.pingdom.com/2011/01/12/internet-2010-in-numbers/


Internet 2010 in numbers

What happened with the Internet in 2010?

How many websites were added? How many emails were sent? How many Internet users were there? This post will answer all of those questions and many, many more. If it’s stats you want, you’ve come to the right place.

We used a wide variety of sources from around the Web to put this post together. You can find the full list of source references at the bottom of the post if you’re interested. We here at Pingdom also did some additional calculations to get you even more numbers to chew on.

Prepare for a good kind of information overload. ;) Leer más “Internet 2010 in numbers”

YouTube Charts Now Searchable By Category

On the YouTube Charts page of the video site, viewers still have the opportunity to search Most Viewed, Most Subscribed and Most Liked videos by Today, This Week, This Month and All time. However, an added feature lets users browse the highest-ranking videos according to category as well. Users can browse the top videos in All categories, Autos & Vehicles, Comedy, Education, Entertainment, Film & Animation, Gaming, How To & Style, Music, News & Politics, Nonprofits & Activism, People & Blogs, Pets & Animals, Science & Technology, Sports, and Travel & Events.


Posted by Megan O’Neill

YouTube LogoWhen YouTube launched YouTube Charts last month, a new interface that ranks the top videos on YouTube, they turned to viewers to ask what features they would like to see added to Charts.  One of the most common questions that viewers had was, “Why doesn’t YouTube Charts rank videos according to categories?”  YouTube has now responded to these viewers by adding new functionality to their Charts, giving viewers the opportunity to search by category. Leer más “YouTube Charts Now Searchable By Category”