1080i 24PA pulldown removal at DVinfo.net

Benjamin Hill · December 27th, 2006, 11:27 AM

So I've used AE's "Interpret Footage" feature and removed the extra interlace frames from my 1080i 24PA footage; the result is true 24P footage now for my 23.98 timeline in FCP. However, there is a very small scan-line artifact appearing at the very top of every 4th frame.

I can probably do trial and error with the settings to figure this out, but that will take some time; if anyone has experience with this issue and already knows what I've got wrong feel free to share! Thanks...

Benjamin Hill · December 27th, 2006, 02:46 PM

Just checked the original data off the cards in P2 Log's viewer, and those lines at the top are there, appearing on the frame BEFORE the interlaced pulldown frame. AE gets rid of that frame but the artifact or whatever it is remains on the frame before. So it looks like I can't get rid of it, other than cropping, but it'd still be nice to know how I'm getting this. Anyone have a stab in the dark?

Sam Jankis · December 27th, 2006, 05:19 PM

Frame grabs would help.

Benjamin Hill · December 27th, 2006, 07:29 PM

Here are two frame grabs from the QT files that were created by P2 Log.

The first is fine, the second shows the strange lines at the top. I know it is miniscule, but when it appears every 4th frame it becomes slightly irritating. Interested in any theories. Thanks

Sam Jankis · December 27th, 2006, 07:35 PM

I haven't noticed it yet. I'll check on the next project.

But two lines IS miniscule... I've had to zoom/crop for more than that often with miniDV and HDV (though not with the HVX).

Benjamin Hill · December 27th, 2006, 08:20 PM

Indeed 2 lines is not much, and I was planning on probably cropping to a wider aspect anyway; but for future reference I'd like to know what's making this happen. One of those things that will gnaw at me until I figure it out.

Sam Jankis · December 27th, 2006, 09:56 PM

Perfectionist?

hehe

Benjamin Hill · January 2nd, 2007, 09:16 AM

Quote:

Originally Posted by Sam Jankis

Perfectionist?

hehe

Unfortunately not quite, esp. if you saw my green screen footage. But that's another can of worms.

Sam Jankis · January 2nd, 2007, 02:10 PM

After using Chromatte (reflecmedia.com)... I never want to light another green screen again.

December 27th, 2006, 11:27 AM	#1
Benjamin Hill Major Player Join Date: Nov 2005 Location: Iowa City, Iowa Posts: 670	1080i 24PA pulldown removal So I've used AE's "Interpret Footage" feature and removed the extra interlace frames from my 1080i 24PA footage; the result is true 24P footage now for my 23.98 timeline in FCP. However, there is a very small scan-line artifact appearing at the very top of every 4th frame. I can probably do trial and error with the settings to figure this out, but that will take some time; if anyone has experience with this issue and already knows what I've got wrong feel free to share! Thanks... __________________ youtube.com/benhillmedia linkedin.com/in/benhillmedia

December 27th, 2006, 02:46 PM	#2
Benjamin Hill Major Player Join Date: Nov 2005 Location: Iowa City, Iowa Posts: 670	It's not AE... Just checked the original data off the cards in P2 Log's viewer, and those lines at the top are there, appearing on the frame BEFORE the interlaced pulldown frame. AE gets rid of that frame but the artifact or whatever it is remains on the frame before. So it looks like I can't get rid of it, other than cropping, but it'd still be nice to know how I'm getting this. Anyone have a stab in the dark? __________________ youtube.com/benhillmedia linkedin.com/in/benhillmedia

December 27th, 2006, 07:29 PM	#4
Benjamin Hill Major Player Join Date: Nov 2005 Location: Iowa City, Iowa Posts: 670	Here are two frame grabs from the QT files that were created by P2 Log. The first is fine, the second shows the strange lines at the top. I know it is miniscule, but when it appears every 4th frame it becomes slightly irritating. Interested in any theories. Thanks __________________ youtube.com/benhillmedia linkedin.com/in/benhillmedia Last edited by Benjamin Hill; January 26th, 2007 at 10:26 PM.

December 27th, 2006, 08:20 PM	#6
Benjamin Hill Major Player Join Date: Nov 2005 Location: Iowa City, Iowa Posts: 670	Indeed 2 lines is not much, and I was planning on probably cropping to a wider aspect anyway; but for future reference I'd like to know what's making this happen. One of those things that will gnaw at me until I figure it out. __________________ youtube.com/benhillmedia linkedin.com/in/benhillmedia

December 27th, 2006, 05:19 PM	#3
Sam Jankis Major Player Join Date: Jun 2006 Location: St. Pete, FL Posts: 223	Frame grabs would help.

December 27th, 2006, 07:35 PM	#5
Sam Jankis Major Player Join Date: Jun 2006 Location: St. Pete, FL Posts: 223	I haven't noticed it yet. I'll check on the next project. But two lines IS miniscule... I've had to zoom/crop for more than that often with miniDV and HDV (though not with the HVX).

December 27th, 2006, 09:56 PM	#7
Sam Jankis Major Player Join Date: Jun 2006 Location: St. Pete, FL Posts: 223	Perfectionist? hehe

January 2nd, 2007, 02:10 PM	#9
Sam Jankis Major Player Join Date: Jun 2006 Location: St. Pete, FL Posts: 223	After using Chromatte (reflecmedia.com)... I never want to light another green screen again.