capture problem?
by susana sanz
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.
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 http://www.youtube.com/watch?v=CVyv_lTywwc
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Re: capture problem? by gary adcock 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
