Jitter/Stutter when panning w/ BMPCC at DVinfo.net

Reggie Moser · May 2nd, 2016, 11:52 AM

Hello all,
I'm fairly new to BMD gear.....when shooting in raw there is a jitter or stutter like effect going on but clears up after the pan. I also did the same pan shot in pro res and it played smoothly..no stutter...I am editing with fcp7 on a 2006 Mac Pro and it does the same thing on my 2009 Mac Book Pro.... I read in another forum that it could be how the video was encoded which is pro res hq or the fact that my computers need to be upgraded.

Bruce Watson · May 2nd, 2016, 12:56 PM

Quote:

Originally Posted by Reggie Moser

...when shooting in raw there is a jitter or stutter like effect going on but clears up after the pan.

Depends on your frame rate, your lens, and how fast you pan. Film will show stutter if the pan is too fast for conditions; it's not simply a CODEC problem. The solution to most pan problems is to slow down the pan.

Noa Put · May 2nd, 2016, 01:05 PM

But Reggie said it's doesn't stutter when he shoots in prores so my guess is something is wrong with how he converts the raw footage.

What is your workflow in dealing with the raw footage?

Reggie Moser · May 2nd, 2016, 01:56 PM

Noa,
I'm using After Effects CS6 to convert the raw clips to prores HQ.

Reggie Moser · May 2nd, 2016, 02:27 PM

Heres an example I found of what I'm experiencing.

Noa Put · May 2nd, 2016, 02:59 PM

Try to follow following tutorial from Mattias, see if that makes any difference: (not sure if it autostarts the right moment but if not, you need to start watching from 06:10)

Michael Stevenson · May 2nd, 2016, 03:59 PM

Quote:

Originally Posted by Reggie Moser

Heres an example I found of what I'm experiencing.

Landscape, Castaic, CA on Vimeo

That is not Judder, that is dropped frames. If my guess is right, when you single frame it, you will get one frame that shows the normal pan movement amount then the next frame will look like two frames have elapsed. Welcome to my world. I have an iMac 5K Retina display computer that does the same damn thing. After exhaustive research, since my graphics card does the rendering and playback, it must be my graphics card. I have spent a small fortune and all I end up with is Crap.

Reggie Moser · May 2nd, 2016, 05:51 PM

Michael,
And I am about to buy the iMac 5k and was thinking it would clear up....I assumed going with the best 4g video card would alleviate the problem. But I guess the processor struggles to handle Raw data correctly.

Jim Andrada · May 5th, 2016, 11:03 PM

I think the pan is a bit too speedy over and above the dropped frame issue. Kept wanting to grab it and slow it down by about 50%. Just my opinion.

Chris Soucy · May 5th, 2016, 11:28 PM

Just a thought.............you HAVE turned OFF OIS on the camera before doing these pans, haven't you?

If you haven't, your chasing ghosts.

CS

Chris Barcellos · May 12th, 2016, 12:38 PM

I agree with Chris and Jim. That looks like image stabilization trying to keep stabilize the image and/or to fast a pan.

Noa Put · May 12th, 2016, 02:06 PM

It's not certain he used a stabilized lens, furthermore he said that in pro res it played smoothly so it can't be a stabilization problem.

Wacharapong Chiowanich · May 15th, 2016, 05:00 AM

Agreed. It's something in the process of the raw conversion and playback rendering. Can't point out the bottleneck exactly as I have had no experience using AE and only rarely worked with raw files. Maybe the limitation of his CPU or hard drive's throughput.

Michael Stevenson · May 15th, 2016, 12:31 PM

Yes, that is another consideration that I've been looking into. I have discovered something that does seem to smooth out the problem. Shoot in 60P!

Reggie Moser · May 26th, 2016, 06:01 PM

Quote:

Originally Posted by Wacharapong Chiowanich

Agreed. It's something in the process of the raw conversion and playback rendering. Can't point out the bottleneck exactly as I have had no experience using AE and only rarely worked with raw files. Maybe the limitation of his CPU or hard drive's throughput.

I certainly agree with you here. I think its something in After Effects and the rendering process. Oh, and I didnt have OIS on.

May 2nd, 2016, 11:52 AM	#1
Reggie Moser Regular Crew Join Date: Mar 2005 Location: Charlotte, NC Posts: 113	Jitter/Stutter when panning w/ BMPCC Hello all, I'm fairly new to BMD gear.....when shooting in raw there is a jitter or stutter like effect going on but clears up after the pan. I also did the same pan shot in pro res and it played smoothly..no stutter...I am editing with fcp7 on a 2006 Mac Pro and it does the same thing on my 2009 Mac Book Pro.... I read in another forum that it could be how the video was encoded which is pro res hq or the fact that my computers need to be upgraded.

May 2nd, 2016, 01:05 PM	#3
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,510	Re: Jitter/Stutter when panning w/ BMPCC But Reggie said it's doesn't stutter when he shoots in prores so my guess is something is wrong with how he converts the raw footage. What is your workflow in dealing with the raw footage?

May 2nd, 2016, 01:56 PM	#4
Reggie Moser Regular Crew Join Date: Mar 2005 Location: Charlotte, NC Posts: 113	Re: Jitter/Stutter when panning w/ BMPCC Noa, I'm using After Effects CS6 to convert the raw clips to prores HQ.

May 2nd, 2016, 02:27 PM	#5
Reggie Moser Regular Crew Join Date: Mar 2005 Location: Charlotte, NC Posts: 113	Re: Jitter/Stutter when panning w/ BMPCC Heres an example I found of what I'm experiencing. Landscape, Castaic, CA on Vimeo

May 2nd, 2016, 02:59 PM	#6
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,510	Re: Jitter/Stutter when panning w/ BMPCC Try to follow following tutorial from Mattias, see if that makes any difference: (not sure if it autostarts the right moment but if not, you need to start watching from 06:10) YouTube (Short URL)

May 2nd, 2016, 05:51 PM	#8
Reggie Moser Regular Crew Join Date: Mar 2005 Location: Charlotte, NC Posts: 113	Re: Jitter/Stutter when panning w/ BMPCC Michael, And I am about to buy the iMac 5k and was thinking it would clear up....I assumed going with the best 4g video card would alleviate the problem. But I guess the processor struggles to handle Raw data correctly.

May 5th, 2016, 11:03 PM	#9
Jim Andrada Inner Circle Join Date: Feb 2007 Location: Tucson AZ Posts: 2,211	Re: Jitter/Stutter when panning w/ BMPCC I think the pan is a bit too speedy over and above the dropped frame issue. Kept wanting to grab it and slow it down by about 50%. Just my opinion.

May 5th, 2016, 11:28 PM	#10
Chris Soucy Inner Circle Join Date: Feb 2007 Location: Fairfield, Dunedin, New Zealand Posts: 3,691 Images: 18	Re: Jitter/Stutter when panning w/ BMPCC Just a thought.............you HAVE turned OFF OIS on the camera before doing these pans, haven't you? If you haven't, your chasing ghosts. CS

May 12th, 2016, 12:38 PM	#11
Chris Barcellos Inner Circle Join Date: Nov 2005 Location: Elk Grove CA Posts: 6,838	Re: Jitter/Stutter when panning w/ BMPCC I agree with Chris and Jim. That looks like image stabilization trying to keep stabilize the image and/or to fast a pan. __________________ Chris J. Barcellos

May 12th, 2016, 02:06 PM	#12
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,510	Re: Jitter/Stutter when panning w/ BMPCC It's not certain he used a stabilized lens, furthermore he said that in pro res it played smoothly so it can't be a stabilization problem.

May 15th, 2016, 05:00 AM	#13
Wacharapong Chiowanich Major Player Join Date: May 2008 Location: Bangkok, Thailand Posts: 400	Re: Jitter/Stutter when panning w/ BMPCC Agreed. It's something in the process of the raw conversion and playback rendering. Can't point out the bottleneck exactly as I have had no experience using AE and only rarely worked with raw files. Maybe the limitation of his CPU or hard drive's throughput.

May 15th, 2016, 12:31 PM	#14
Michael Stevenson Regular Crew Join Date: Jan 2006 Location: Lynnwood, WA Posts: 98	Re: Jitter/Stutter when panning w/ BMPCC Yes, that is another consideration that I've been looking into. I have discovered something that does seem to smooth out the problem. Shoot in 60P! __________________ Michael Stevenson