ioHD Conversions 1080p30 or 1080i29.97

[Jim Wiseman]

Jeremy,

Began shooting with 24p and will stick with it. I am adapting my technique and I am happy with it. One question: when I play back from within FCP from 24p 1080 time line XDCAM HQ codec without ioHD (still at my studio), just from Macbook Pro on its display, I am seeing the video without any pulldown added, am I not? If that is correct, when is pulldown added, and would that further reduce apparent jitter? Or am I offbase here? Would an HDTV or HD professional monitor, say Sony XBR, add furhter smoothing processing as well? Also it is playing back with no dropped frames from FCP here in the field.

Thanks again,

Jim Wiseman

[Gary Adcock]

[Jim Wiseman] “when I play back from within FCP from 24p 1080 time line XDCAM HQ codec without ioHD (still at my studio), just from Macbook Pro on its display, I am seeing the video without any pulldown added, am I not?”

Correct.
there is no pulldown in 1080 24psf, this is a SMPTE standard format
pulldown is only added when needed for the 60i/60p output.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

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

[Jeremy Garchow]

[Jim Wiseman] “Began shooting with 24p and will stick with it. I am adapting my technique and I am happy with it.”

Cool. Glad to hear it.

[Jim Wiseman] “One question: when I play back from within FCP from 24p 1080 time line XDCAM HQ codec without ioHD (still at my studio), just from Macbook Pro on its display, I am seeing the video without any pulldown added, am I not?”

You are not, and that is correct. Although what you are looking it as an approximation of what your video really looks like and you won’t truly know until you play it out through a capture device and a monitor.

[Jim Wiseman] “If that is correct, when is pulldown added, and would that further reduce apparent jitter?”

Well, here’s the rub. When watching back 1080psf23.98 material on most monitors that accept that format, what you are really truly seeing is a 1080 48i signal (aka 1080psf23.98). So, your monitor is refreshing 48 times a second as opposed to what you have been looking at your whole life which is 60 times a second. So the monitor (and I am talking about an external monitor, not your computer display) will tend to look a bit ‘flickery’, and that’s just the monitor without your footage. Putting up a field of white would show this flicker. There are more modern monitors out there that refresh more often (120Hz) and this flicker is reduced when watching on those types of displays. Some people are used to it and can watch it that way, but some people can’t. For those that can’t, you simply set your FCP video output to 1080i29.97 and FCP will add the proper pulldown on output to get you 29.97 (60Hz) and the monitor will stop that flicker. It might also help smooth out some of the jitter of the motion of your footage as well, if you still aren’t used to it.

Make sense?

Jeremy

[Jim Wiseman]

Yes, it does Thanks much for all of your help on this, Jeremy, Gary, and all.

Jim Wiseman

[Jim Wiseman]

Back home and playing back the footage directly from the EX1 component out to Sony XBR37 component in. Very happy with the footage, and glad I shot the 24p. I suspect pulldown or some sort of processing is being done, although I have all of the available “processing” settings on the XBR off, as the footage seems much smoother than on the Macbook Pro in the field. Is pulldown being added anywhere?

Thanks again

Jim Wiseman

[Jeremy Garchow]

Glad you found success.

[Jim Wiseman] “I suspect pulldown or some sort of processing is being done, although I have all of the available “processing” settings on the XBR off, as the footage seems much smoother than on the Macbook Pro in the field. Is pulldown being added anywhere?”

I am simply not sure, but I know on some 1080 cameras that shoot 23.98 natively, pulldown is automatically added to the outputs. Hook your camera up to your ioHD and see what it says for the input format. It will either be 1080sf23.98 or 1080i29.97. After that point, we will take the next step. From memory, I belive the EX1 adds pulldown.

Jeremy