Tech Anyone know how to calculate the bandwidth needed to stream HiDef?

[chaze]

I'm trying to find out how much MBPS is needed to stream about 100 simultaneous hi def videos.

Wiki says you need 4.5 for each one, which would 450 MBPS. This seems really high, any idea here?

[abshard]

If you encode them at 4.5mbs or 4500kbps including audio and have exactly 100 simultaneous streams that's 450mbs.

It all depends what bitrate you encode them. If you don't cap each connection at a specific kbps you can go over 450mbs as they buffer the videos faster then they play.

[Relic]

In ffmpeg

-vcodec libx264 -maxrate 1500k -bufsize 3000k

"Mobile"

[2MuchMark]

The Googletron-5000 is your friend.

https://www.google.ca/webhp?sourceid...rea m+Hi+Def?
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[chaze]

Originally Posted by **********

The Googletron-5000 is your friend.

https://www.google.ca/webhp?sourceid...rea m+Hi+Def?
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.
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Oh cool, so yeah it looks like the wiki was the end game. I was hoping there was some magical trick to stream hi def without using around 4 mbps for each watcher.

That's a hefty bandwidth bill for a big site.

[abshard]

Originally Posted by chaze

Oh cool, so yeah it looks like the wiki was the end game. I was hoping there was some magical trick to stream hi def without using around 4 mbps for each watcher.

That's a hefty bandwidth bill for a big site.

You can stream 1080p at a bitrate 100kbps but it will looks like garbage, you need to find a bitrate that's high enough that still looks good but low as possible.

Some videos will need higher bitrate to look as good as others that need a lower bit rate. Outdoor scenes usually require a lot more bit rate.

When you encode you can use a fixed bit rate or you can use CQ (constant quality) setting to make all videos have the same quality. Fixed rate all videos will be roughly same size per minute of video, CQ they will all be different sizes.

Download a x264 encoder and test some different settings on some videos and see how they look. I use ripbot264 but there are a lot of other ones.

[chaze]

Originally Posted by abshard

You can stream 1080p at a bitrate 100kbps but it will looks like garbage, you need to find a bitrate that's high enough that still looks good but low as possible.

Some videos will need higher bitrate to look as good as others that need a lower bit rate. Outdoor scenes usually require a lot more bit rate.

When you encode you can use a fixed bit rate or you can use CQ (constant quality) setting to make all videos have the same quality. Fixed rate all videos will be roughly same size per minute of video, CQ they will all be different sizes.

Download a x264 encoder and test some different settings on some videos and see how they look. I use ripbot264 but there are a lot of other ones.

That's what I needed, I'll will have it tested at the lowest bitrate that still looks good.