I-Frame proxies w/ NanoFlash/HDX900 at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > External Video Recording Solutions > Convergent Design Odyssey

Convergent Design Odyssey
...and other Convergent Design products.


Reply
 
Thread Tools Search this Thread
Old April 5th, 2010, 09:45 PM   #1
New Boot
 
Join Date: Mar 2010
Location: Boston, MA
Posts: 18
I-Frame proxies w/ NanoFlash/HDX900

Trying to make SD proxies of tape footage while shooting with HDX900 for use with Avid MC 4.0.5. Sending SD/SDI to nano running I-frame via down-converted SDI output. Video and audio are getting through and nano is detecting signal but not timecode. Am I doing something wrong in the settings or is this just an incompatibility with HDX's means of down-converting to SDI out? I know QT Long GOP might be satisfactory w/ Avid MC for 50mbps but this also seems to incur a lot of rendering/transcoding time. Any work-around?

Stephen McCarthy
Stephen McCarthy is offline   Reply With Quote
Old April 6th, 2010, 02:28 AM   #2
Regular Crew
 
Join Date: Sep 2009
Location: GLASGOW, UK
Posts: 71
SD Long GOP should be fine in Avid

Hi Stephen,

If you record 50Mbit IMX50 in MXF wrappers I would expect that to import and play fine in Avid 4.0.5 as it's a supported format.

I'll check that out today.

Dave
Dave Chalmers is offline   Reply With Quote
Old April 6th, 2010, 05:31 AM   #3
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,413
Dear Stephen,

Timecode may not be present on your (SD) SDI signal.

You can obtain a timecode input cable for your nanoFlash, or a timecode plus remote control and tally light cable.

These are available from our dealers. nanoFlash.net - Free World Wide FedEx Express Shippingwith purchase of nanoFlashOrder online or email rick@nanoflash.net keeps these in stock.

One alternative is to use our HD proxy mode at 18 Mbps. You should have timecode via HD-SDI. (I would not use I-frame at very low bit-rates).
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old April 6th, 2010, 02:27 PM   #4
Regular Crew
 
Join Date: Mar 2010
Location: San Francisco, California
Posts: 156
same issue, different reason with HDX900

I am doing an SD shoot tomorrow and will be using the HDX900's SD downconverted SDI signal. So, it sounds like there is not embedded timecode in that signal, is that right?

The workaround is:

-set internal timecode in the Nano and record manually,
OR
-use a timecode/trigger cable

Is there a reason that the HDX900 does not output timecode with the downconverted SD-SDI signal? Is there a setting in the camera that fixes that, or is it always not present?

I am reading these posts without doing any testing myself... so I am assuming if I run this setup, I will not see timecode from the SDI signal. I will test later to be sure.
Scott Stoneback is offline   Reply With Quote
Old April 6th, 2010, 04:39 PM   #5
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,413
Dear Scott,

We have had multiple reports of certain cameras not outputting timecode in SD-SDI.

We have a timecode cable that solves the problem.

It would be nice to know if timecode was actually present or not in the HDX900. According to the SMPTE Spec, it is optional.
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old April 6th, 2010, 07:40 PM   #6
Regular Crew
 
Join Date: Nov 2009
Location: Wilmington, NC
Posts: 31
Dan:

If you are referring to seeing embedded TC from the HDX-900 in the SDI downconvert mode then I do not see it. Nor do I see it on the SDX-900 outputting through SDI. Just Audio and Video.

These are two cases where the TC / HDSDI/SDI cable to the NanoFlash would come in handy.
Dusty Powers is offline   Reply With Quote
Old April 6th, 2010, 08:03 PM   #7
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,413
Dear Dusty,

Yes, exactly.
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old April 7th, 2010, 01:29 AM   #8
Regular Crew
 
Join Date: Mar 2010
Location: San Francisco, California
Posts: 156
Yep, HDX900 is definitely not embedding timecode in the SD SDI signal. I feel like a dropped frame.

Looks like I will be buying a cable soon...
Scott Stoneback is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > External Video Recording Solutions > Convergent Design Odyssey

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 02:14 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network