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VBR Encoding WMV with Sorenson

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Andrew Saliga
VBR Encoding WMV with Sorenson
on Oct 22, 2009 at 7:38:01 pm

I'm using Sorenson to encode WMVs for the first time and would like to confirm I'm doing the VBR encoding correctly. I'm trying to encode the video at 7-18mbps. I chose WMV 9 Advanced as the encoder and set my data rate to 7,168kbps and the max data rate to 18,421kbps (it's the closest I could get to 18,432kbps without going over).

-Andrew Saliga

Steelehouse Productions
http://www.steelehouse.com (undergoing a much-needed redesign)
http://www.vimeo.com/steelehouse


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Daniel Low
Re: VBR Encoding WMV with Sorenson
on Oct 22, 2009 at 7:51:24 pm

[Andrew Saliga] "I'm trying to encode the video at 7-18mbps"


Wow that's pretty high, are you encoding 1080p?



__________________________________________________________________
"There's no chance that the iPhone is going to get any significant market share. No chance."
Steve Ballmer To USA Today: 30 April 2007

"We and Apple are neck and neck and we're chasing the two
other players,"
Steve Ballmer, referring to Nokia and Research in Motion. October 6th 2009


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James Roche
Re: VBR Encoding WMV with Sorenson
on Oct 22, 2009 at 8:03:26 pm

very sorry wrong thread!


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Andrew Saliga
Re: VBR Encoding WMV with Sorenson
on Oct 22, 2009 at 8:03:56 pm

Source is 1080 output is 720. My math is right though correct? 7mbs=7168kbps

I'm compressing FLVs, 2 flavors of MPEG-2s, 2 flavors of WMVs...at lot of different needs for this project. I know with this particular WMV compression it's going to be used for HDTVs.

-Andrew Saliga

Steelehouse Productions
http://www.steelehouse.com (undergoing a much-needed redesign)
http://www.vimeo.com/steelehouse


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Daniel Low
Re: VBR Encoding WMV with Sorenson
on Oct 22, 2009 at 9:13:50 pm

[Andrew Saliga] "My math is right though correct? 7mbs=7168kbps "

To most people 7 Megabits per second = 7000 Kilobits per second.

I you want to do VBR I'd aim for a peak of 14Mb/s rather than 18



__________________________________________________________________
"There's no chance that the iPhone is going to get any significant market share. No chance."
Steve Ballmer To USA Today: 30 April 2007

"We and Apple are neck and neck and we're chasing the two
other players,"
Steve Ballmer, referring to Nokia and Research in Motion. October 6th 2009


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Andrew Saliga
Re: VBR Encoding WMV with Sorenson
on Oct 22, 2009 at 9:23:13 pm

Thanks Daniel.

As for the settings in Sorenson, the "Data Rate" section...I assume when doing VBR that is the average data rate? Is there no place to set the minimum?

-Andrew Saliga

Steelehouse Productions
http://www.steelehouse.com (undergoing a much-needed redesign)
http://www.vimeo.com/steelehouse


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Daniel Low
Re: VBR Encoding WMV with Sorenson
on Oct 22, 2009 at 9:52:54 pm

I don't use Sorenson but usually you set an average and a peak, the peak is usually not more than twice the average.

__________________________________________________________________
"There's no chance that the iPhone is going to get any significant market share. No chance."
Steve Ballmer To USA Today: 30 April 2007

"We and Apple are neck and neck and we're chasing the two
other players,"
Steve Ballmer, referring to Nokia and Research in Motion. October 6th 2009


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Andrew Saliga
Re: VBR Encoding WMV with Sorenson
on Oct 22, 2009 at 10:58:37 pm

Thanks again Daniel. I guess if I stop and think about it, it makes sense that the peak shouldn't be more than twice the average.

-Andrew Saliga

Steelehouse Productions
http://www.steelehouse.com (undergoing a much-needed redesign)
http://www.vimeo.com/steelehouse


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