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December 1st, 2006, 08:19 AM
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#1 |
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Trustee
Join Date: Apr 2005
Location: Chicago
Posts: 1,214
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FYI: ProHD uncompressed clip
Often the question comes up about uncompressed clips off of a ProHD camera. Since alot of people do not have the means to capture uncompressed I'm providing you with a clip off of an HD-100's component below.
Click Here for Clip (580MB) Broken link.... This clip will only be up for a short while to give you an idea of what kind of bandwidth it takes to work in uncompressed. The clip is 5 seconds long and weighs in at a whopping 580MB. Needless to say you need an ultra fast SATA or SCSI array (Raid 0) to handle it. Now imagine the uncompressed 1080p requirement! Anyway you can try your 24p pulldown technique on the file and try some CC on it. You'll find that you have infinately more data to CC than tape or 1394 captured source. Regards, Stephen
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Advanced Avid Liquid Training found Here Last edited by Stephen L. Noe; December 1st, 2006 at 07:14 PM. |
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December 1st, 2006, 09:21 AM
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#2 |
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Trustee
Join Date: Sep 2005
Posts: 1,065
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Why oh why?
So Stephen, given the stats you list, is there any practical reason why anyone would go the uncompressed route?
I had heard that this was the way to go for greenscreening, but it would seem to require way too much fire-power in terms of drive speed and space - esp if you were using a lap top to digitize the footage. Have you ever used the uncompressed option (other than the example you provided) and if so, why? Thanks again Stephen - john evilgeniusentertainment.com |
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December 1st, 2006, 09:53 AM
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#3 |
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Trustee
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Location: Chicago
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The reason why would be color. Color correcting uncompressed is infinately more forgiving than any compressed format. Try for yourself with the supplied clip.
I'm not talking about luma corrections that we all do (a la pull down blacks & gamma adjustments), I'm talking about secondary (CMY) color corrections which are unforgiving in m2t. Global primary (RGB) adjustments are relatively safe on m2t and what most people do. If you want to adjust someones skin tone (individually) in a scene, that requires either secondary color correction or selective color correction. As you can probably imagine, global (overall) corrections are a far cry from selecting a single color to adjust (usually with a pipette in a CX or secondary process). Many times with global adjustments you're working at getting some element in the scene the way you want it to look but you've adjusted something else out of whack. So if it's color critical material then uncompressed off the component or HD-SDI is the way to go. I think most small film makers and documentary makers at our level (independent production) alot of times wouldn't even consider an uncompressed workflow, but there are great benefits if it's in the budget. The whole d@mn thing doesn't mean much if the story sucks though.
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December 1st, 2006, 10:26 AM
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#4 |
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Regular Crew
Join Date: May 2006
Location: Portugal
Posts: 140
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Hi!
How do I open/play the file on a mac? I'd love to see how it looks. |
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December 1st, 2006, 01:27 PM
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#5 |
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Regular Crew
Join Date: May 2006
Location: Chicago, IL
Posts: 114
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I'm not positive, but i believe the file is taking a huge load on the site's bandwidth. Maybe you can share it via bit torrent.
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December 1st, 2006, 01:34 PM
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#6 |
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Trustee
Join Date: Mar 2004
Location: Milwaukee, WI
Posts: 1,719
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.2vuy files are from Liquid and only work with Liquid or if you get the codecs from Liquid. As far as I know the codecs will not work on a mac.
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December 1st, 2006, 03:22 PM
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#7 |
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Trustee
Join Date: Sep 2005
Posts: 1,065
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Didn't work on mine...
just downloaded as code on the screen... john evilgeniusentertainment.com |
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December 1st, 2006, 03:24 PM
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#8 | |
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Trustee
Join Date: Jun 2006
Location: Burbank
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Quote:
This very issue caused me to go to Edius last year for a major project. I learned over a period of several months that no matter what anyone may say, this is the case. If anyone thinks I'm wrong, tell me what standard 3rd party program or software encoder will read a Liquid exported uncompressed 2vuy file and I will try it and if it works I will retract this. |
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December 1st, 2006, 04:08 PM
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#9 | |
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Major Player
Join Date: Apr 2006
Location: Pacific NW
Posts: 431
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Quote:
One of the reasons I will never get anywhere near liquid. |
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December 1st, 2006, 07:07 PM
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#10 |
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Trustee
Join Date: Apr 2005
Location: Chicago
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Uhh.... Sorry I couldn't accomodate all of you. I tried....
Your NLE probably puts uncompressed in a wrapper that is incompatible as well. I could have given you an uncompressed sequence. BTW: Who here is working in uncompressed?
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December 2nd, 2006, 09:28 AM
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#11 | |
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Major Player
Join Date: Sep 2005
Location: London, UK
Posts: 343
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Quote:
FYI, the Liquid 2vuy files are a legacy format from the Pinnacle board. These are the same as those captured by the Mac Cinewave. You can save them out from QT as Apple or Blackmagic 8-bit legacy format and use them in other applications on other workstations. Stephen could export his 2vuy file using QT as an Apple Blackmagic legacy 8-bit 2vuy file and QT will just add the appropriate wrapper resulting in a file almost identical in length. Anyone with Apple or BM codecs (Mac or PC) could then view the file. Also, note that because Avid (AXPro/MC/Symph) use QT architecture, when you have Liquid installed on the same workstation you can import Liquid 2vuy files directly into Avid. I know that this is not the promised land but it makes Liquid a lot more useful than is suggested here. |
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