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Avid DNxHD encoding Windows version only !!!
Hello all
Currently I’m FCP running on mac. Can someone confirm that the high-efficiency Avid DNxHD encoding is Windows only. The DNxHD seems to take only 1/6th of the hard drive space with no quality diffrence. Hence all the reason amongst many to have AVID Xpress Pro HD. Most of my work is HD and this would make a reasonable edit suite.Thanking evry in advance.
bal Deo -
5 Replies
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DVCProHD codec takes up as little space as DNxHD. If you are using an AJA or Blackmagic card, choose DVCProHD, and you will have the same results, and the same quality.
Bob Zelin – ps – there is quite a difference between DNxHD 145 and DNxHD 220.
bob Zelin
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The DNxHD is supported on Macs (EXCEPT MAC Pros! That will come in couple of months) with the latest version of Adrenaline (2.5x) and XPro (5.5x).
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DNxHD, especially, at 220 should yeild noticably better results than DVCProHD. Two main factors drive this:
1. Data rate. DVCProHD at either 720/59.94P or 1080/59.94i runs at 100MBps. DNxHD is at 220 MBps.
2. Sampling structure. DVCProHD sub-samples the 1280 of 720 to 960 and the 1920 of 1080 to 1280. DNxHD maintains the full raster of the relevant format.I would consider the DNxHD 145 format to be for offline work.
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If DNxHD145 is an off line format, and Unity ISIS uses DNx145 exclusively for shared storage, and that is what CBS network has standardized to, then I guess when we watch CBS network, we are watching off line resolutions (being even further compressed by our local
cable providers or satellite dish companies).bob Zelin
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The main reason I was intrested in the DNxHD Codec was due to the following information from the Avid site. This was quoted by the editors working on King Kong. And i assumming they used 220 not 145!!!!!
“We recreated the trailer in the Avid, which exactly matched the one that had been done as a 2k and filmed out. We went into a demonstration screening in Peter’s theater to see whether the quality of the Avid preview was going to be acceptable. Instead, we were trying to figure out which was the uncompressed 2k and which one wasn’t. We were very pleased with the quality for this type of preview work; it’s well beyond our expectations,” says Birrell.
“As far as we are concerned, [Avid] DNxHD is uncompressed [in terms of quality]. It’s all we are ever going to want,” adds Olssen about the space-efficient encoding format.Thanks
Bal DeoBal Deo
StreetLife Productions
http://www.st-life.com
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