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  1. 21st Nov 2007 11:23 #1
    spandau
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    I have always been told that DVCPro HD is 100Mbps compressed HD. And yet when I look at the clip information for a clip that is 720p24 in FCP it says the data rate is 5.9MB/sec and a 720p60 clip I have says 14.1MB/sec. Where is this extra compression coming from, how can I learn to predict it, and where the heck is the 100MBps number coming from from panasonic?
    Thanks!
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  2. 21st Nov 2007 11:34 #2
    jagabo
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    14 * 8 ~= 100

    Difference between bytes and bits?
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  3. 21st Nov 2007 11:36 #3
    edDV
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    DVCProHD uses 4x DV hardware Codecs and thus ~4x DV bitrate @ 1280x1080i. 960x720p may result in a somewhat different bit rate.

    DV is 25Mb/s+audio+metadata or ~ 30Mb/s or ~ 3.8MB/s

    4x that is 100Mb/s+audio+metadata or ~ 14MB/s.

    You would expect 24p to use ~ 40% the bit rate of 59.94p or about 5.75MB/s so your Byte rates seem in the ball park.
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  4. 21st Nov 2007 13:23 #4
    spandau
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    damn you, bits and bytes!
    thanks guys!
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