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Forums Compression Techniques VBR Encoding WMV with Sorenson

  • VBR Encoding WMV with Sorenson

  • Andrew Saliga

    October 22, 2009 at 7:38 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

  • Daniel Low

    October 22, 2009 at 7:51 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

  • James Roche

    October 22, 2009 at 8:03 pm

    very sorry wrong thread!

  • Andrew Saliga

    October 22, 2009 at 8:03 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

  • Daniel Low

    October 22, 2009 at 9:13 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

  • Andrew Saliga

    October 22, 2009 at 9:23 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

  • Daniel Low

    October 22, 2009 at 9:52 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

  • Andrew Saliga

    October 22, 2009 at 10:58 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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