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April 13th, 2009, 03:07 PM
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#1 |
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Trustee
Join Date: Nov 2008
Location: spain
Posts: 1,202
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HD-space on hard disk
Could you explain me guys the basical things about HD?
I mean:1 hour of hdv equals...... 1 hour of Sd equals..... thx |
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April 13th, 2009, 03:26 PM
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#2 |
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Major Player
Join Date: Jun 2004
Location: Oxfordshire, UK
Posts: 416
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...13 GB
...13 GB as well! (The HDV contains more information, but is more highly compressed.)
__________________
Martin at HeadSpin HD on Blu-ray |
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April 13th, 2009, 04:01 PM
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#3 |
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Inner Circle
Join Date: Feb 2004
Location: switzerland
Posts: 2,133
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you simply have to convert the bandwith to disk space.
DV=25Mbit/sec , need 8 bits to make one byte, so 25/8=3.125 MBytes/sec. HDV is the same. multiply by 3600 to get one hour. 3.125x3600 =11250 Mbytes or 11.250 Gig. Since there is always some discrepancie with calculation (sometime 1meg=1024K, sometime 1Meg=1000K, you never know). XDCAM Ex =35Mbit/sec AVCHD , MPEG2 are more tricky since each camera can use its own speed and sometimes several speed (low/mid/high quality setting) |
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April 13th, 2009, 04:09 PM
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#4 |
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Regular Crew
Join Date: Apr 2009
Location: Windsor, Ontario, Canada
Posts: 78
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Martin, would it not depend on which camcorder you are using. Some have 25mb/s. DV are more like 6mb/s? The HV30 used 11.32GB for an hour of raw footage. I'm sure SD footage would be much less...
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University of Windsor student. Trying to find funds for gear... |
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April 13th, 2009, 04:40 PM
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#5 |
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Trustee
Join Date: Nov 2008
Location: spain
Posts: 1,202
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Ok thank u guys; what about if i have to edit 1 hour in dv-avi,and what about 1 hour in m2t hdv?
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April 13th, 2009, 05:26 PM
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#6 |
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Inner Circle
Join Date: Mar 2003
Location: Ottawa, Ontario, Canada
Posts: 4,222
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DV and HDV are CBR 25mbps so will use exactly the same time on tape. About 12GB for the hour. The codec is different so the data is different but both are recorded CBR 25mbps. That's also true of DV LP speed too its just using less tape to record( higher bit density on the tape) and this is why LP is more susceptible to drop outs and head alignment. Doesn't matter whether you record or edit its still the same. It will only change if you change the codec that you render to from the NLE.
Ron Evans |
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April 13th, 2009, 09:06 PM
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#7 | |
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Trustee
Join Date: Jan 2008
Location: North Conway, NH
Posts: 1,745
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Quote:
Bradley's a little off the mark, or maybe misunderstood your question. All the other answers are correct and saying the same thing in different ways. |
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