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capture problem?

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susana sanzcapture problem?
by on Apr 17, 2009 at 9:25:30 am

"Hi,

after shooting with the HDW 750P SONY camera we have found some
problems when we started to edit the footage.

Clips were captured from a MacBook Pro, with the Matrox MXO2, using
the codec Apple Pro Res 422HQ, 10 bits, 4:2:2 full raster.

On importing the clips to FinalCutPro into a sequence, we noticed the
image and audio were out of sync. We were watching , for instance,
take #1 and listening take #3, but after rendering the sequnce, we
realised that the image was definitely take #3.

On the other hand, once the render was done, the motion was not
entirely smooth and fluent. Every 10-15 frames approximately, we
noticed that some frames were duplicated instead of showing different
ones.

So, here it goes the question:

The format we have shot on is HDCAM, which is a 8 bits, 3:1:1
format, and as we have captured the footage in 10 bits, 4:2:2, could
it be the reason why we are having these problems??

Any other ideas?

Thank you very much, I hope someone can help us to solve this.

susana


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Mads Nybo JørgensenRe: capture problem?
by on Apr 17, 2009 at 5:07:09 pm

Hey Susana,

I would expect you to have captured HD-SDI with audio locked to video?
In which case your problem is likely to be either a slow hard-disk or corrupt data-base.



All the Best
Mads
London, UK

Mac Million Ltd. - HD Production & Editing
Please watch our latest video on Data Protection at




Blog: http://blog.myspace.com/bigflopproductions


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gary adcockRe: capture problem?
by on Apr 17, 2009 at 5:23:32 pm

[susana sanz] "Clips were captured from a MacBook Pro, with the Matrox MXO2, using
the codec Apple Pro Res 422HQ, 10 bits, 4:2:2 full raster. "


That setup is not certified for a ProResHQ capture on a laptop.

That may or may not be part of the issue, dropped frames should not have been an issue on a desktop CPU capture

.[susana sanz] "he format we have shot on is HDCAM, which is a 8 bits, 3:1:1
format, and as we have captured the footage in 10 bits, 4:2:2, could
it be the reason why we are having these problems?? "


No.
that is correct for what you are doing the HDSDI signal out of the deck would be 4:2:2 and the color space conforms to the SMPTE spec.for baseband video.


gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

Inside look at the IoHD
http://library.creativecow.net/articles/adcock_gary/AJAIOHD.php




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Steve WargoRe: capture problem?
by on Apr 20, 2009 at 5:57:06 am

This does not work on a laptop. You should use a raid with three or more drives on a desktop computer. Laptops are for dv.

Steve Wargo
Tempe, Arizona
It's a dry heat!

Sony HDCAM F-900 & HDW-2000/1 deck
5 Final Cut (not quite PRO) systems
Sony HVR-M25 HDV deck
2-Sony EX-1 HD .


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