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Thread started 13 Jun 2012 (Wednesday) 23:27
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Judders, stutters or what?

 
GOA510
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Jun 13, 2012 23:27 |  #1

Background story, don't really have any video experience besides what you see below and a couple other videos, so pretty new at it.

This is the first video I've used slider footage and noticed this stutter/judder in just about all the scenes the slider was used. I know its not the slider, so I'm trying to figure out what I did wrong. Originally I was thinking I used the wrong shutter speed, then I did some searching online and I'm thinking the stutter/judder is caused from not locking the exposure. Does it look like that to any of you? Or am I off and its something else all together? Really appreciate the help, kinda hate the video now due to the stuttering. But you live and you learn right?

Also, any other constructive criticism would greatly be appreciated :)

https://vimeo.com/4401​6067 (external link)


[1D Mark III][5D Mark II][15 2.8 Fisheye][17-40 F4L][24-70L][85 1.2L][70-200 F2.8L IS][300 F2.8L]

  
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Sickone
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Jun 14, 2012 04:08 |  #2

You my friend are suffering from the 24fps infamous judders.

In short it's annoying, this issue drove me nuts a few months ago. Some people said it was my tripod and some said my camera. I did my homework.

http://www.projectorce​ntral.com/judder_24p.h​tm (external link)

Watch this for ways to avoid it, it can help but won't completely get rid of it. Definitle pan faster then slow it down method works better.

http://www.youtube.com​/watch?v=pyorWarc-4k (external link)


Nice video though and imo the L lens really does make a difference to clarity. Did you do much in post?




  
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Kolor-Pikker
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Jun 14, 2012 04:37 |  #3

Sickone's got it right, there are quite a few rules cinematographers follow to avoid things like these, and it has nothing to do with the camera; films cameras have 24fps jitter too.

Here's a good article to read: http://www.dvuser.co.u​k/content.php?CID=208 (external link)
It 's primarily about the difference between shooting interlaced vs. progressive, but it does touch upon a lot of relevant points.

Edit: Also, is it just me, or is the guy in the beginning flipping the viewer off?


5DmkII | 24-70 f/2.8L II | Pentax 645Z | 55/2.8 SDM | 120/4 Macro | 150/2.8 IF
I acquired an expensive camera so I can hang out in forums, annoy wedding photographers during formals and look down on P&S users... all the while telling people it's the photographer, not the camera.

  
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GOA510
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Jun 14, 2012 13:09 |  #4

Sickone wrote in post #14577065 (external link)
You my friend are suffering from the 24fps infamous judders.

In short it's annoying, this issue drove me nuts a few months ago. Some people said it was my tripod and some said my camera. I did my homework.

http://www.projectorce​ntral.com/judder_24p.h​tm (external link)

Watch this for ways to avoid it, it can help but won't completely get rid of it. Definitle pan faster then slow it down method works better.

http://www.youtube.com​/watch?v=pyorWarc-4k (external link)


Nice video though and imo the L lens really does make a difference to clarity. Did you do much in post?

Thank you! Very much appreciated :) I'm going to read both of those links as soon as I'm done with this post :)

One question I do have, I was shooting at 30fps (or technically 29.97 or whatever it is), when I imported video clips into Premiere Pro its listed them as being shot at 29.97. I did notice when I went to export it in the "Summary" box it listed the "Output" 29.97fps but the "Source" as 23.976. Did I just select the wrong settings for the Sequence or is that something covered in those links? hahaha

Thank you for the comment on the video, much appreciated. I didn't really do anything in post. Added some sharpening mainly to see how much of a difference it would be and I played around with the Brightness & Contrast minimally with one video clip. I did want want to make the colors more vivid, but with all the options for colors, figured I'd do my homework and what does what before experimenting.

Kolor-Pikker wrote in post #14577113 (external link)
Sickone's got it right, there are quite a few rules cinematographers follow to avoid things like these, and it has nothing to do with the camera; films cameras have 24fps jitter too.

Here's a good article to read: http://www.dvuser.co.u​k/content.php?CID=208 (external link)
It 's primarily about the difference between shooting interlaced vs. progressive, but it does touch upon a lot of relevant points.

Edit: Also, is it just me, or is the guy in the beginning flipping the viewer off?

Thank you! Will definitely be reading that article as well asap, really appreciate it.

Yeah he's flipping the camera off hahaha He's not much of a camera person especially after finding a hose leak all over his face :)

Thank you both again! I'm going to read up on those articles and hopefully improve next time around. Those judders really killed the video for me, was "this" close from not even posting it online. But I'm glad I did, got some good help :)


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GOA510
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Jun 14, 2012 14:38 |  #5

Thanks to you guys and those links I believe I found a portion of my problem. Looks like I messed up in the very beginning of post. The sequence I selected was for 24p and I was recording at 30p. My guess is that the sequence converts the footage to 24p and that was making my stability issues perfectly clear. I watched the raw sample from the first pan/slidder footage and it is much smoother. I can notice a couple tiny judders but waayyy better than previous footage. In Premiere Pro (with a correct 30p sequence) it plays much smoother on the Source screen and on the Program screen the judders are more pronounced at full playback resolution. When I drop down to 1/2 or 1/4 in the playback resolution its back to being smooth again.


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Sickone
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Jun 14, 2012 14:53 |  #6

Ah so not the exact 24fps issue but at least you got the result you needed. We've all been there, some of us are still there :oops:




  
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GOA510
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Jun 14, 2012 15:38 |  #7

hahaha yeah I had to change it up you know? Get the same issue a different way :)

The technique that guy used in that youtube video (shooting in 720 then slowing the footage down), that's not something I can't really do with the 5D MK II correct? Since it can't record any higher than 30fps. I tried slowing down some of the slidder footage to see what would happen, but it wasn't pretty haha


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GOA510
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Jun 14, 2012 16:10 |  #8

One thing I just thought of but haven't searched online yet, is it possible to change the sequence settings so its at the correct fps of the video that's already edited and put together? I tried going into "sequence settings" but the option to change the fps was grey'd out. Kind of hoping I can fix my mistake without having to re-edit the whole thing.


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Kolor-Pikker
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Jun 15, 2012 04:37 |  #9

GOA510 wrote in post #14579750 (external link)
hahaha yeah I had to change it up you know? Get the same issue a different way :)

The technique that guy used in that youtube video (shooting in 720 then slowing the footage down), that's not something I can't really do with the 5D MK II correct? Since it can't record any higher than 30fps. I tried slowing down some of the slidder footage to see what would happen, but it wasn't pretty haha

Yep, the reason the 5D2 can't do 50/60p is because the scan rate of the sensor itself is 30fps, but newer cameras like the 7D have faster scan rates.

One thing I just thought of but haven't searched online yet, is it possible to change the sequence settings so its at the correct fps of the video that's already edited and put together? I tried going into "sequence settings" but the option to change the fps was grey'd out. Kind of hoping I can fix my mistake without having to re-edit the whole thing.

Hmm, I haven't been using Pr long enough to get around to having to do this, particularly since it's supposed automatically set the sequence settings according to the first clip you drop into the timeline.


5DmkII | 24-70 f/2.8L II | Pentax 645Z | 55/2.8 SDM | 120/4 Macro | 150/2.8 IF
I acquired an expensive camera so I can hang out in forums, annoy wedding photographers during formals and look down on P&S users... all the while telling people it's the photographer, not the camera.

  
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ChasWG
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Jun 16, 2012 01:11 |  #10

One of my first videos I messed it up like this too. I shot it at 24fps, but created the whole thing as a 30fps project. Thus jacking it up pretty good. I was using (and still do) Sony Vegas and once the project perameters are set, they are set. no quick fix really. You only do this once and you learn to check all the correct boxes the first time.

Interesting links guys, thanks!


Chas Gordon
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http://vimeo.com/user9​461302/videos (external link)

  
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