Streaming Media over the InternetPresentation Transcript
Streaming media over the Internet A million channels and there is still nothing on! By Samuel Shiffman Streaming Technologist Seton Hall University [email_address]
Why are we turning our computers into television sets ? Question:
Answer: Because we can
Future Broadband convergence will allow for this.
Cable, DSL, Satellite. MPEG2
What is Streaming Video ? Streaming multimedia allows the user to begin viewing video clips without first completely downloading the entire file. After a brief initializing and buffering, the file begins to stream.
Most streaming media requires that the viewer install a downloaded player on the viewing computer . Keep in Mind..
What are the Current players?
Biggest Market share.
Most Used Player around.
Goes to show that the spoils of war often go to whoever gets there first.
Huge installed base via Video Editing programs.
Multimedia artists tend to be Mac Loyalists.
Looks really good.
Windows Media Player
Its Free, The Server is Free
Comes bundled with Microsoft OS.
History of Video Streaming
Only Been around since 1995
Now Real Networks
What Does Streaming Media look so bad ?
Your picture quality will be determined by your available bandwidth (download speed) and computer processor.
Users with older 486 processors and slower modem connections will have more dropped frames and idealization.
How do I get my Media on the Web? The process of preparing audio and video sources such as video tapes, film, CD, slides etc. for streaming media is called “encoding”. How do I get my Media on the Web?
Encoding Encoding requires specialized playback and capture equipment and software that converts the audio/video signal to a streaming media file in the format of choice. Encoding Media Files
Production Audio and video quality in streaming video are highly dependant upon the original source material. Using professional quality tape formats when acquiring the source will help to ensure good image quality in streaming. Streaming Media Production
Encoding It is very important that quality standards and professional equipment be used in the encoding process. When the source is “captured” all audio and visual information is converted digitally. Keep in Mind!!!!!
Encoding This means that if your source footage stinks, video “noise” or poor signal quality is also captured and encoded. This adds to the overall file size and bandwidth requirements to play the file and degrades the overall performance of the streaming media.
Encoding The Better the Source, the Better the Stream. Keep in Mind!!!!!
Production Remember that all audio and visual information will be captured and “encoded” in the stream. That means that unnecessary camera movement, high motion backgrounds, and “busy” scenes will result in streaming media that requires more bandwidth and may not play clearly. Streaming Media Production
Production Appropriate lighting and camera techniques are also critical for the best streaming media. Streaming Media Production
Production The best images for streaming are steady, fairly simple compositions such as a head and shoulders shot. Streaming Media Production
Target Audience The viewers that watch your streaming media are called the “Target Audience”. Target Audience and Bandwidth
Target Audience It’s important to know as much about them as possible before selecting streaming formats. Target Audience and Bandwidth
Target Audience The type and size of connection to a network or the Internet that the target audience has will help to determine the “bandwidth” that your clips should be encoded for. Target Audience and Bandwidth
Bit Rate The rate at which a clip is encoded for is called "bit-rate.” If the target audience is 56K modem users, a clip encoded at a bit rate of 80 Kbps will be useless to them. Bit Rate
Bit Rate They won’t be able to play it and will have a frustrating experience. Bit Rate
Players It’s also important to determine what players your target audience is likely to have.
Players Remember, if the viewer does not have the player installed, they will have to download it. Many times, clips will be encoded in several formats, and at several bit rates to accommodate different players.
Multimedia Video Production Process Reality Check: What do I need to make a streaming media presentation?
Multimedia Video Production Process
Video and Sound Editing Software
Encoding production software
Multimedia Video Production Process Real Video = Real Producer QuickTime = Sorenson Broadcaster Encoding Production Software Windows = Media Encoder
Multimedia Video Production Process Media Cleaner Pro - Terran Adobe Products like Premiere Encoding Production Software Sound Forge - Sonic Solutions
Multimedia Video Production Process
Live Real Video = Windows NT
Live QuickTime = Sorenson Broadcaster
Live Video Encoding and Streaming
Windows Media Encoder- Windows NT
Servers Remember: In order to stream media you need a server that is configured with the right streaming software.
The Real Time Streaming Protocol, or RTSP, an application-level protocol for control over the delivery of data with real-time data, such as audio and video. Sources of data can include both live data feeds and stored clips.