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Capturing Directly From XDCam EX1 SDI out

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Akbar Ukani
Capturing Directly From XDCam EX1 SDI out
on May 30, 2009 at 6:24:51 pm

I am wondering with my xdcam ex1 can be used as a deck to capture footage via the SDI out port on the camera...I want to play around with ProRes 4:2:2 footage

- I am recording on a MxR Sandisk SDHC Ultra II 16Gb card
- Clips shot in 1080p24 HQ Mode
- I have a Matrox MXO2 I/O box
- Mac Pro 2x2.66Ghz Dual Core with 8Gb RAM with 1 additional Hitachi drive dedicated for Audio/Video content

Can someone please give me the workflow or direct me to a link with instructions to achieve the footage directly out of my SDI port? Thank You


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Michael Palmer
Re: Capturing Directly From XDCam EX1 SDI out
on May 30, 2009 at 6:29:32 pm

"I am wondering with my xdcam ex1 can be used as a deck "
Yes you can play the clips from the card via SDI into the MXO2 and capture as Pro Rez

Good Luck
Michael Palmer


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Craig Seeman
Re: Capturing Directly From XDCam EX1 SDI out
on May 30, 2009 at 6:58:47 pm

But remember once compressed always compressed.

Clips in XDCAM EX codec uprezed to Apple ProRez don't gain resolution (although further deterioration may be minimized). On the other hand shooting live and sending out HD-SDI before XDCAM codec has touched the signal will give you "Uncompressed" source (then intelligently compressed with ProRez).



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Akbar Ukani
Re: Capturing Directly From XDCam EX1 SDI out
on May 30, 2009 at 7:47:24 pm

Hey...Yes I certainly understand that once it gets compressed in the camera then pretty much its Quality In = Quality Out =)...

however, the reason I am trying to get into ProRes directly from the SDI port is because I am having some issues with the native xdcam files when adding filters and transitions between shots...doing so degrades the playback quality significantly and I am thinking perhaps I can overcome this playback problem if I convert the footage into something of an "frame" based editing codec instead of staying in Long GOP

any steps to achieve that workflow? I can definitely use media manager in FCP, but I just want to see if I can achieve it via the SDI port from the camera? Thanks


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Craig Seeman
Re: Capturing Directly From XDCam EX1 SDI out
on May 30, 2009 at 8:00:35 pm

Transitions and light compositing shouldn't do too much damage to EX codec. It can even handle a color correction pass if you're not pushing things too far. I and many others do chroma key with EX codec (shooting progressive) without notable negative impact. When setting sequence to edit in EX also set renders to ProRes.

If you're seeing something serious on transitions you may have something wrong with your settings. Again heavy compositing is a different story but if it's adding a filter or transition that should be fine.



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Tim Kolb
Re: Capturing Directly From XDCam EX1 SDI out
on May 31, 2009 at 1:07:45 am

I don't know if you'd be gaining much.

By the time you change 35 Mbits/s long GOP to 145/220 Mbits/s I-frame ProRes will quadruple your data rate at least...

I suspect any processing advantage gained by going to i-frame will be more than offset by the massive increase in data rate.




TimK,
Director, Consultant
Kolb Productions,


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Bob Pierce
Re: Capturing Directly From XDCam EX1 SDI out
on May 31, 2009 at 2:21:17 pm

And of course Final Cut allows you to set your XDCAM EX sequence to render with Pro Res. Check the render options in "Sequence Settings".
Bob

http://www.lightstreamassociates.com

Mac Pro 2.66 - 8GB memory - Mac OS 10.5.5 - Quicktime 7.5.5 -
Mac Book Pro 2.33 Duo -
FC Studio 2 (Final Cut 6.0.4) - Kona Lhe
Adobe Production Suite CS3 -
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Ikegami HLDV7 - PVW EX-1



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Tim Pendergrass
Re: Capturing Directly From XDCam EX1 SDI out
on Jun 2, 2009 at 2:58:35 am

also make sure your FCP playback settings are at full quality, I've seen problems with playback set lower during transitions



tim@videoloungeproductions.com


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