Net Data Design, LLC Blog

In the last installment of this series I covered the basic tools and theories behind delivering great streaming content to your audience without breaking the bank. Either out of pocket or in bandwidth, so lets talk about Bit Rate Throttling to begin with.

Imagine this – a client connects to your server, clicks on your featured video, watches 5 seconds of it to realize they have no interest in watching further, and move on to the next video.

In those 5 seconds, the server could have sent out 5 minutes worth of the video, and you paid for 5 minutes worth of bandwidth! With the Bit Rate Throtter + media bitrate detection, the server would only end up sending a little over 5 seconds worth, and you would end up paying only for what was used.

Bit Rate Throttling (BRT) is a module plug-in for IIS 7 0r IIS 7.5. It’s an extension of the IIS Media Service. The IIS7 Bit Rate Throttling module was first announced at the National Association of Broadcasters (NAB) show last April as part of the TCO advantage for Silverlight.  Enabling Web masters to throttle the delivery of any file based on the file type. It also has additional functions for digital audio/video files. Throttling can be set at the following levels within Internet Information Services (IIS) Manager: server, site, virtual directory, and file.

BRT contains the following features:

• Fast Start – the ability to send the first part of the media file without rate limiting, to seed the playback buffer in the player and make sure that playback can begin as soon as possible (most players try to pre-buffer a certain amount of the video, often 5 seconds, before starting playback). This also insures that if the connection suffers a hiccup, the playback can continue uninterrupted.
• Disconnect detection - when the client stops watching the video, goes to another page, or closes the video, the BRT detects the connection closure and stops sending the file.
• Built-in support for detecting the playback rate for common media formats, including .asf, .avi, .flv, .m4v, .mov, .mp3, .mp4, .rm, .rmvb, .wma, and .wmv.
• Ability to configure static throttling rates, and media auto-detection rates at any configuration level.

It should also be noted you can configure the BRT module to handle static files as well, such as a large [progressive] .jpg file. So, if you feel you need to trim the bandwidth, Bit Rate Throttling module is a great place to start.

In the next segment I’ll focus on the Smooth Streaming IIS 7+ features and capabilities.

At first glance Silverlight seems like just another platform for creating interactive website, desktop and mobile applications. Much like Adobe’s Flash or AIR. but there is a lot more to it. As I’ve mentioned before, I’m all about giving my clients a product that suites them best even though it may be outside of my “comfort zone.”

I have a client (to be named later) that had a need to deliver high-quality videos without breaking the budget. By budget I mean in terms of bandwidth, encoding, and preparation. We also host this clients website which was recently moved to a new server running Windows 2008 R2, with IIS 7.5. So in looking for a solution I came upon Silverlight, which is a natural fit with IIS 7.5′s  Media Services and Smooth Streaming.

To make this scenario work, you’ll need Microsoft’s Expression Web 3 or Microsoft’s Expression Studio 3. The Expression Encoder 3 is bundled with those packages with sell from (estimated) $150 to $500 dollars. Both packages offer a wide array of tools that will help in your video encoding as well as many other tasks such as website development and desktop applications.

With Expression Web 3 alone, you be able to code in PHP, HTML/XHTML, CSS, JavaScript, ASP.NET, ASP.NET AJAX, all using standards-based code (yes, I checked), however Expression Encoder is the key. It’s not only easy to navigate and use, but allows you to drop in QuickTime, AVI, MPEG, and other formats into the encoder, and utilize the latest quality and speed improvements to the VC-1 or H.264 codecs, choose a Silverlight template (or make your own), and publish directly to a web server using Expression Encoder Publishing Plug-in. It should be noted that the video can also be published locally and viewed.

Smooth Streaming is the production version of a technology first used by Microsoft to deliver on-demand video of the 2008 Summer Olympics for NBCOlympics.com. By dynamically monitoring both local bandwidth and video rendering performance, Smooth Streaming optimizes playback of content by switching video quality in real-time.

Using Smooth Streaming, visitors with high bandwidth connections and modern computers can experience full HD quality streaming, while others with lower bandwidth or older computers receive the appropriate stream for their capabilities. The result is visitors across the board enjoy a compelling, uninterrupted streaming experience, which ultimately lead to extended visitor stays and increased revenue opportunities.

In my next installment of this topic, I’ll cover the nuts and bolts of Bit Rate Throttling and Smooth Streaming.