Latest post Tue, Sep 10 2013 12:59 PM by Moses.M. 2 replies.
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  • Tue, Sep 10 2013 11:18 AM

    • Moses.M
    • Top 150 Contributor
    • Joined on Mon, Jun 9 2008
    • Austria
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    different CPU load while capturing from different SDI sources?

    I ran some test with MC 7.0 and a BMD Ultrastudio SDI on a notebook an realized that i got different CPU loads while capturing from different HD-SDI sources.
    source 1 was the output of a  adrenalin hardware with installed HD boards.
    source 2 was a sony video mixer (DFS-800) 

    what's the difference? 8 vs 10 bit??

    all other settings were the same 1080i25. I ran the test using different codecs too (185 / 185X / 120) - same result.

    regards - M.

    HP xw8400 - 6GB RAM | W7 64 bit | MC 5.5.2 | Adrenaline with DNxcel Sony Vaio SB1Z1 - 6GB Ram | W7 64 bit | Blackmagic Design Ultra Studio SDI [view my complete system specs]
  • Tue, Sep 10 2013 11:51 AM In reply to

    • Joachim Claus
    • Top 150 Contributor
    • Joined on Fri, Nov 4 2005
    • Seeheim-Jugenheim, Germany
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    Re: different CPU load while capturing from different SDI sources?

    Moses.M:
    what's the difference? 8 vs 10 bit??

    8-bit means coding of Y/Cb/Cr is with 8 bit per code-word, which gives 256 different luma-/color values.

    10 bit means codeing of Y/Cb/Cr is with 10 bit per code word, which gives 1024 different luma-/ color values.

    Probably, the CPU load with 10 bit is higher than the one resulting from 8 bit.

    Joachim

    SuperMicro Workstation 7048A-T Dual Xeon (10 cores) E5-2640v4 2.4GHz 128 GB RAM, PNY P4000, 1 PCIe SSD 400 GB (Intel SSDPEDMW400G4) 1 SSD 2 TB for UHD... [view my complete system specs]

    Joachim Claus

  • Tue, Sep 10 2013 12:59 PM In reply to

    • Moses.M
    • Top 150 Contributor
    • Joined on Mon, Jun 9 2008
    • Austria
    • Posts 651
    • Points 8,100

    Re: different CPU load while capturing from different SDI sources?

     I know what 8 and 10 bit mean - I want to KNOW whether it 'causes the higher CPU load...

    HP xw8400 - 6GB RAM | W7 64 bit | MC 5.5.2 | Adrenaline with DNxcel Sony Vaio SB1Z1 - 6GB Ram | W7 64 bit | Blackmagic Design Ultra Studio SDI [view my complete system specs]
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