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1080 24p to proress via aja iohd

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Sebastian Toro
1080 24p to proress via aja iohd
on Feb 18, 2008 at 4:05:39 pm

is it possible to capture 1080 24p footage from hd-SDI to prores HQ with aja iohd?

i'll be using an sony ex1
then i have the opportunity to test also a big setup with an arri-d20 via a HDCAM-SR tape recording on set...i thinking to offer the iohd for videoassist and offline with the hdSDI output from HDCAM SR VTR.

how about to capture original timecode from the VTR , LTC or RS422. i want prores footage to edit and if it is necesary then recapture the SR 4:4:4 material with HD dual-link and make the on-line...

thanks in advance...



sebastian toro -
sinsistema.tv -
bs.as. argentina


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Jeremy Garchow
Re: 1080 24p to proress via aja iohd
on Feb 18, 2008 at 6:24:26 pm

Yes. Make sure your capture drives are fast enough, something in an eSATA variety, not firewire. You will be able to capture single link, not dual link HD SDI. Use AJA VTR Exchange to capture clips with proper timecode, either LTC or via SDI.

Jeremy


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Michael Sacci
Re: 1080 24p to proress via aja iohd
on Feb 18, 2008 at 10:25:18 pm

Hope you don't mind me asking a similar question here.

I want to do a live record of a line cut from a multi-cam shoot. I want this to be used as a batch capture list so I need to be logging as it is capturing. All the cameras will be recorded to tape and then captured later using this logging info. Would the VTR program work for this or would it be better to do something like this from within FCP.



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Jeremy Garchow
Re: 1080 24p to proress via aja iohd
on Feb 18, 2008 at 10:39:37 pm

No worries. I take it you will be running off of a tc gen so all cams get same tc?

All you need to do is log and not capture?

VTR Exchange is not a logging program unfortunately. But if you capture as you go, you can then bring those clips into FCP and do your XML/EDL/Batch list work there for your mutlicam cut and capture.

Or you can simply log in FCP, but you won't be able to capture anything with timecode as FCP doesn't pass tc with "non-controllable device" selected as deck control. I hope this gets updated soon.

You can also check out dedicated logging software such as HDLog which will allow the most flexible logging but it's pricey.

http://www.imagineproducts.com/hdlog.htm

Jeremy





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Michael Sacci
Re: 1080 24p to proress via aja iohd
on Feb 18, 2008 at 10:51:07 pm

Thanks, I think capturing with TC (yes there would be a TC Gen) without logging would be more time saving than logging without capturing.

Another side question, has anyone used this device? AEC-mBOX-2 It is $400
http://www.adrielec.com/fcs/




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Jeremy Garchow
Re: 1080 24p to proress via aja iohd
on Feb 18, 2008 at 11:15:20 pm

[Michael Sacci] "Thanks, I think capturing with TC (yes there would be a TC Gen) without logging would be more time saving than logging without capturing. "

Yeah, it depends on what's most important to you. Since you have to capture a multi-cam anyway, perhaps the logging is more important than capturing right away? I don't know. That's up to you.

I have not used the mBox myself but know people who have and they like it. The ioHD is supposed to work like the mBox but an update to FCP is required. Once that update happens the ioHD will work just like the mBox. If you are going to spend the dough, you might as well check out HDLog. There's a demo that you can download.

Jeremy


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Sebastian Toro
Re: 1080 24p to proress via aja iohd
on Feb 18, 2008 at 11:52:47 pm

i m back
good insert, Mr Sacci!

i continue with my point and tech doubts

i read the ajaioHD manual and nothing about 1080 24p capture... and film frame rates

i found output throgh HDMI 1080p23.98, 1080p24, 1080p25, 1080p29.97, and 1080p30 (no support for this through HDMI input, but no need)

i ve only found an easy setup for FCP 1080 23.98psf...i believe thats the format recorded from ex1.
but i doubt capturing with this format for 24p material from the arri-20 / hd cam SR setup.
will be the timecode accurate with the tape recorded?

certaninly i doesnt understand well enoguh the segmented frame issue...

thanks both for your posts
and sorry for my gauchos english





sebastian toro -
sinsistema.tv -
bs.as. argentina


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Jeremy Garchow
Re: 1080 24p to proress via aja iohd
on Feb 19, 2008 at 2:09:09 pm

Well, my hillblly Spanish is way way worse than your gaucho's English. You're doing fine.

This is a bit above my expertise at the moment, but I would imagine that the HR deck will retime to 23.976 psf out of the single link hd sdi port. The ioHD MIGHT be cable of capturing 24.0, but it's going to be hard to monitor that. I'd hit up support@aja.com.

Are you planning on a film release for this? Why not shoot 25 and conform to 24.0 later?

Enjoy your mate today.

Jeremy


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Jeremy Garchow
Re: 1080 24p to proress via aja iohd
on Feb 19, 2008 at 8:17:47 pm

Hey Sebastian, the release notes do claim 1080psf24.0 capture:

• Io HD software release version 5.1 supports the following formats:
525i 29.97 625i 25
720p 50* 720p 59.94
720p 60 1080i 25
1080i 29.97 1080i 30
1080sf 23.98 1080sf 24
Note: *720P 50 is only supported by Final Cut Pro version 6.0.2 and later.



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Sebastian Toro
Re: 1080 24p to proress via aja iohd
on Feb 19, 2008 at 9:07:06 pm

It's a good point. shoot 25p is an option. but 25p isnt available.
so what about capturing interlaced and software deinterlacing in FC. how it works for a feature film. is this a quality issue or not... i'm finishing a film with SI-2k 24p (the DoP choose this option instead of 25p like i propose) but it's already data so no compromisses at this point.
i have another type of problems with this RAW footage. The most of it was about workflow.

So i want to be ready with my Video Assist/Master Capture Option If this people using the ARRI d-20 whant to shoot 24p too.

i'm already making research for tech info about PSF and Progressive. and 23.98/24 timecode also... before i order my IOHD...

thank you very much JG...


sebastian toro -
sinsistema.tv -
bs.as. argentina


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Jeremy Garchow
Re: 1080 24p to proress via aja iohd
on Feb 19, 2008 at 9:37:56 pm

Capturing psf won't yield two separate fields that you need to deinterlace. It's two fields but they are pretty much the same.

Hopefully Gary Adcock can add more pieces to this puzzle. Also send an email over to AJA and tell them your purposed workflow. See what they say.

Jeremy


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Sebastian Toro
Re: 1080 24p to proress via aja iohd
on Feb 25, 2008 at 7:45:44 pm

i contact aja and they said this about HD formats and HDCAM SR...

The Io HD supports both 1080p24 and 1080pSF24 and is compatible with a HDCAM SR.
Other video formats include: 1080pSF/p23.98, 1080pSF/p24, 1080i/pSF/p25, 1080i/pSF/p29.97, 1080i/pSF/p30, 720p varicam (all rates), 720p50/59.94/60, NTSC 525 and PAL 625.
Note: The HDMI video standard does not support 1080pSF23.98 or 1080pSF24 video formats.


so it fits for me...

thanks all



sebastian toro -
sinsistema.tv -
bs.as. argentina


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