AJA IO HD and 24p

[Noah Kadner]

I suspect the output from the camera is 60p or 60i with pulldown and you’d need to do that in post, no?

Noah

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[Bruce Greene]

I’ve captured from my Varicam and the I/O removes the duplicate frames and fcp captures at 24fps from the 60p HDSDI output from the Varicam.

There are presets to add pulldown to capture 30p as well if you’d prefer that I believe.

I could not find a way to maintain the original camera timecode on the captured clips though. Does anyone know if this is possible?

Varicam/Steadicam Owner
Los Angeles, CA
http://www.brucealangreene.com

[Gary Adcock]

[bruce alan greene] “I could not find a way to maintain the original camera timecode on the captured clips though. Does anyone know if this is possible?”

Hey Bruce

use the VTR Exchange app that is available on their website- FCP does not understand TC over HDSDI.

there is a VFR setting in the “source” settings.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

Inside look at the IoHD

[Gary Adcock]

[Doug Bassett] “Anyone using the HDX900 with an AJA IOHD at 24p live capture?
Trying to figure out if the IO will do the pulldown.”

By that do you mean remove the pulldown?

look at the link below my sig for answers

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

Inside look at the IoHD

[Doug Bassett]

Thanks all, got my answer at this thread.
https://forums.creativecow.net/readpost/150/859164

[Bruce Greene]

[gary adcock] “[bruce alan greene] “I could not find a way to maintain the original camera timecode on the captured clips though. Does anyone know if this is possible?”

Hey Bruce

use the VTR Exchange app that is available on their website- FCP does not understand TC over HDSDI.

there is a VFR setting in the “source” settings.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows “

Thanks Gary. Grammar question though: Who is “their”? Apple or AJA or someone else?

I read the manual for the I/O and don’t understand the timecode settings in the control panel. At the default setting, the capture went fine. I tried one of the other settings to see if I could get time code over HDSDI and put into the pro res data by the I/O box. It didn’t work and the resulting capture duplicated a lot of frames and only recorded the 1st half of the clip. It also played in a stuttering slow motion.

I guess there’s some timecode lingo I’m not familiar with here.

What does “RP188 timecode track” mean? LTC timecode? SLTC?

VFR=Visual Flight Rules?…Oh, Variable Frame Rate, Duh. I’ll have to try this out.

Thanks again Gary.

Varicam/Steadicam Owner
Los Angeles, CA
http://www.brucealangreene.com

[Gary Adcock]

[bruce alan greene] “Who is “their”? Apple or AJA or someone else?”

Bruce- How long have you known me??

VTR exchange is an AJA application https://www.aja.com/ajashare/AJA_VTR_Xchangev4.tar

“What does “RP188 timecode track” mean?”

OK are you trying to be funny or did you not show up that day at Varicamp???
The RP188 timecode track is the ancillary TC (timecode) info that carries the flags for the VFR (variable frame rate) data as part of the embedded TC (timecode) info.

“LTC timecode? “ its analog timecode info

Linear (or Longitudinal) Timecode (LTC) encodes SMPTE timecode data as a Manchester-Biphase encoded audio signal. The audio signal is commonly recorded on a VTR track or other storage media. Each frame is terminated by a ‘sync word’ which has a special predefined sync relationship with any video or film content.

Many professional audio engineers see this use of LTC in sound-effects as an exceptionally lazy, unrealistic sound design technique. In the industry “LTC” is pronounced “Litsy”.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

Inside look at the IoHD

[Bruce Greene]

[gary adcock] “Bruce- How long have you known me?? “

[gary adcock] “OK are you trying to be funny or did you not show up that day at Varicamp???”

Something like that. I shot the last movie on film and I’ve regressed. (we did use the i/o boxes to capture the video tap though!)

I downloaded the application from AJA and reviewed the manual (I don’t have the AJA i/o with me). Am I correct in observing that this application takes the place of log and capture in FCP? I just run this app to capture all the footage live to ProResHQ Quicktime files? And it will contain the original timecode from the rp188 timecode that’s in the HDSDI output?

Or do I need to play the tapes from a deck with a special time code cable (rs232?) to the i/o?

Thanks Gary!

PS, is it ok to capture to a single external eSATA drive for ProResHQ 720P? Or do I need a RAID? It’s a small project and we’d like to avoid the expense of a RAID. We’ll just dub to firewire drives and keep them in a safe and secure location for backup. And we’ll have the tapes as well.

Varicam/Steadicam Owner
Los Angeles, CA
http://www.brucealangreene.com

[Gary Adcock]

[Bruce Alan Greene] “Am I correct in observing that this application takes the place of log and capture in FCP? I just run this app to capture all the footage live to ProResHQ Quicktime files? And it will contain the original timecode from the rp188 timecode that’s in the HDSDI output? “

Yes -VTR Exchange replaces FCP to allow for LTC capture of embedded TC over HDSDI, additionally offering the same VFR frame removal when you use the Video Settings > Source Video> any raster size that includes the letters “VFR” after the name. ( there are ones for both 1080 and 720p sizes and multiple finished frame rates)

“Or do I need to play the tapes from a deck with a special time code cable (rs232?) to the i/o? “
That is another option – but we were discussing the capture of TC embedded in the HDSDI stream as played directly from the camera.

“is it ok to capture to a single external eSATA drive for ProResHQ 720P? Or do I need a RAID?”
I am never comfortable capturing to a single dish drive, a 2 drive SATA drive is more than sufficient for capture of ProRes- I did something friday for Bob Zupka were I captured 1080 30 to a Sonnet F2 drive ( 2 drives in one case) via Esata and an IoHD, works just fine.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

Inside look at the IoHD

[Bruce Greene]

[gary adcock] “I am never comfortable capturing to a single dish drive”

Thanks Gary for the information. I’ll test the system later in the week with a g-tech 2drive raid.

I have been looking in the kitchen for a 2 dish drive by can’t figure out how to plug it into the computer, but I think I have some Corning Fireware dishes around somewhere.

Varicam/Steadicam Owner
Los Angeles, CA
http://www.brucealangreene.com