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Streaming Video - Everything You Need To Know

On The Edge Productions - Streaming Video

Streaming Video - What is it?

Streaming is technology of online video playback. To fully understand this, you need to understand the functioning of the World Wide Web. Web servers are often described as "stateless." This stateless approach works very well for graphics and text. Feed them into the browser and simply slap them on the screen. But moving images and sound are problematic. Unlike a graphic, video, animation, and sound have a time element to them. With that time dimension, often comes a larger file size. Under the stateless approach, a Web user would need to download the entire clip before it can be viewed. But with the large file size that comes with even a short clip, the wait becomes unbearable.

With streaming video the goal is to bypass the limitations of the World Wide Web. Instead of downloading a file entirely before being able to see it, streaming technology allows the user to see it as it is downloaded, using real-time buffering. Much like TV or listening to the radio, you receive the images or audio just before you see or hear them. So rather than a stateless data connection, streaming is more of a continuous connection.

Paced out over time, the file size of the clip becomes less of an issue. But that is not to say that it is not still an issue. The reality is that raw file sizes for digital audio/video are absolutely huge. So to get them down to a size that works for a modem or LAN, compression is used. The goal of compression is to throw away data that you don't need. That makes the file size much smaller. But it also begins to degrade the image and sound.

Streaming Video
Clip optimized for 56K modem
Streamed at 34kbps

Streaming Video
Clip optimized for Hi-Speed Connection
Streamed at 250 kbps


So much like other Internet based forms of delivery, working with video online is all about compromises. How much data can you throw away and still see the video clearly? How can you get more out of the compression? Delivery and playback is restricted to the end-user's available bandwidth. Because of this, producers & encoders tend to make feeds available in different formats including 28k modem, 56k modem, T1, ISDN, DSL, LAN, and so on.

Related Links:

Streaming Video - Encoding
Streaming Video - Webcasting
Streaming Video - Samples
Streaming Video - Online advertizing by On The Edge Productions Inc.

 


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