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bit rates for steaming

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Mike Jeffs
bit rates for steaming
on Feb 4, 2009 at 8:15:06 pm

We are Streaming a large medium and small versions of files using telestream mp4 with an h.264 codec. Is there any standard bits rates used out in the industry for SD footage? Any help or thoughts would be appreciated



Mike Jeffs
Video Coordinator
BYU-Idaho


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Robert Longwell
Re: bit rates for steaming
on Feb 4, 2009 at 11:19:00 pm

That sort of depends on your staging size. Are you doing 640x480, 480x360, 320x240, etc..

Robert Longwell


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Mike Jeffs
Re: bit rates for steaming
on Feb 12, 2009 at 5:28:28 pm

we are doing 640x480 large and 640x480 medium and a 320x240 small

Mike Jeffs
Video Coordinator
BYU-Idaho


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Robert Longwell
Re: bit rates for steaming
on Feb 12, 2009 at 6:25:49 pm

640x480 you could target around 800kbps. 320x240 you could target around 400kbps. These are just ballparks, it really depends on the complexity of your footage.

I suggest trial and error.

Robert Longwell


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Craig Seeman
Re: bit rates for steaming
on Feb 12, 2009 at 7:00:53 pm

Also your target viewership.

What is the typical internet connection speed of the viewer?

For example, in NYC DSL is available at 3000kbps and Cable can go up to 30,000kbps.
Certainly "budget" users may be at 768kbps though.

Other parts of the country may have slower typical connections though.

Such questions might be:
• Regions you target (rural areas tend to have slower connections)
• Income bracket you target (businesses and professionals tend to have faster connections when available). If you're target people in "budget" brackets you may need lower data rates.
• Source Complexity (as Robert notes). Greater motion between frames generally requires higher bit rates to maintain quality or you must shrink frame size or lower frame rate.



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Mike Jeffs
Re: bit rates for steaming
on Feb 12, 2009 at 7:56:02 pm

Thanks at least i have some numbers to start at. I work at a Unversity, and most of these videos are targeted for on-campus viewing. so network connects are quite high

Mike Jeffs
Video Coordinator
BYU-Idaho


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