Options for Video Streaming Understanding and applying the technology to volleyball.

Options for Video StreamingOptions for Video Streaming

Understanding and applying the technology to volleyball

How does live streaming work?How does live streaming work?

• A camera sends a video signal to a computer (usually a laptop).


• The computer “encodes” the video signal into a smaller, more easily transmitted file.– Normal video is 640 x 480 pixels and 30 frames/sec.

How does live streaming work?How does live streaming work?• Streamed video is usually reduced to at least

half size and half the frame rate (320x240 at 15fps).

This would be a quarter TV screen and look a little jumpy but is pretty darn good for streaming (webcasting).


• As the computer shrinks the file, it is sent over the internet to a streaming server.

• A streaming server is a powerful computer with lots of internet bandwidth.– You could only get about a dozen viewers on your typical high-speed

cable modem.


• The streaming server re-broadcasts the feed to users who are viewing on the internet.


• The server can even offer several different sizes that require different amounts of bandwidth.

• 128K small, can be a little shaky/jumpy least expensive.• 256K A little larger, smoother.• 375K Even larger, smoother.• 512K Looks pretty good. Large. Most expensive.

Live streaming shopping listLive streaming shopping list

• A video camera– Almost any kind will do as long as

there is a way to send the signal from the camera into the laptop.

– The most typical signal is firewire. Most modern video cameras have a firewire port. Sony calls it iLink.


• A computer to capture the video signal and send it to the streaming server.– Usually a laptop with a

firewire port or you can get a cheap firewire card.

– Should be relatively new, powerful enough to resize the video signal to a smaller stream quickly.


• Capture/Streaming software– Runs on the laptop to compress the video signal and

transmit it to the streaming server.– Available for Mac & PC.– Usually low cost.

Try http://all-streaming-media.com

http://all-streaming-media.com/


• A human with a microphone– Streams are better if there is someone who can

commentate or at least call out the score.– They can also move/zoom the camera during time

outs.


• High speed internet in the Gym– Usually wireless.– Needs to be fast enough (756 KB or more).


• Local streaming server or Commercial Server


• Local streaming server– Campus IT “might” have one or can build one.– Best option if your school has bandwidth since you

can make it free to viewer and use free software.– Your IT department needs to have a clue.


• Commercial server– Usually charge per viewer or per megabyte

downloaded.– More simple since they provide all software and

server configurations.– Not as good for recruiting since payment required.– Some sites offer free streaming like www.vidiac.com.

• They insert commercials to pay for it. Not verified.

$$

http://www.vidiac.com/



Using YouTubeUsing YouTube

A free, easy to use method that might be good enough.


• Register for free account at youtube.com• Allows free 10 minute clips to be uploaded.• Can capture video live or later from camera.• Leverages YouTube’s enormous bandwidth for

free.



• Doesn’t stream in real time.• Clips must be captured or uploaded in 10 minute

segments.• Clips available about 10 minutes after upload.• Requires a person to start new capture every ten

minutes.


• Sample video upload:http://www.youtube.com/UniversityAthlete

• Choose UA Seminar

http://www.youtube.com/UniversityAthlete



Questions?Questions?

Date post:	29-Mar-2015
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Options for Video Streaming Understanding and applying the technology to volleyball.

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