Strange vertical lines stuttering on Canon 550D

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nidas

Member
I got some very strange vertical lines stuttering at the bottom of my movies when I move the camera. I shot with 1/50th shutter with a nikon 50mm 1.4 lense. I have a Sandisk extreme III class 10 8GB card so it shouldn´t be that problem.

I have uploaded a video on Vimeo where you can see what I mean...

EDIT: I´ll taken the video away...
 
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Your vimeo tag is wrong. Just use the number, not the whole URL.

I don't see any vertical lines. Can your take a screenshot on a frame that has it and post it here?
 
Thanks for trying to help me I can´t get the Vimeo video linked right...
I tried with just the nr but that looked totally wrong...?

Its more like a stutter or jitter when I pan and Ican´t see it on a still image only when I play it.. Maybe this has to do with the CMOS chip?

I should edit my message again.
 
What I meant by still image is a frame from the video. Can you playback the video, pause it when you see it and then save that frame as an image and post it here?
 
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thanks a bunch for the Vimeo thingy!
I understand what you want from a still image but I can´t see it on still images.. I know see that I only see it in motion... I am sorry for not seing that before and I did some new searches on jittering and found some info on the net that people have these jitters when they make panning. you see it on the bottom of the movie all the time (see it in full frame!) when I move the camera (which my shaky hands do all the time :)... )

Is this normal on these cameras? Are people avoiding doing pans? Or will it not show if I use a fluid head? What about when I would run and Gun guerilla style with some nice DSLR rig which will shake a bit?
 
Oh ok, I see what you mean now. What exposure settings were you using when you shot this? Its possible to create stuttering with the right (or wrong) shutter speed and pan speed.
 
I shot it at f2.0 and shutter speed was 1/50th I think. Its an manual lense..
I used the Auto white balance....
 
I don't see any vertical line here, but if you mean the things i see almost nothing..i think it's nothing to do with your camera, it's the computer(sometimes display cards) which can't play your footage properly, i had the same thing with my hvx and i search it all internet about but couldn't find anything about it..Suddenly one of my client make me realize that there is nothing wrong with it because i was apoligizing about it:) try to convert it somethingelse and then check again..
 
I'm seeing just a lot of general stuttering on the whole frame. Honestly, I wouldn't worry about it unless it keeps showing up in your footage. Go shoot something else and see if you're still getting it.
 
i would say it's mostly the compression magnifying a problem due to the out of focus and panning in a busy frame, this thing was really compressed, how many stages of compression did you go through before noticing the lines.
 
Amr Rahmy said:
i would say it's mostly the compression magnifying a problem due to the out of focus and panning in a busy frame, this thing was really compressed, how many stages of compression did you go through before noticing the lines.
Click to expand...

I was under the impression he uploaded the out-of-camera files.
 
2:n generation.. took my quicktime from camera and rendered an mp4 and uploaded it.. It looks exactly the same on the original footage. Its not become worse when I made this mp4.

The thing I think look strange is that the stutter almost looks like a line beacuse its visible on so many frames on the same spot...
 
nidas said:
2:n generation.. took my quicktime from camera and rendered an mp4 and uploaded it.. It looks exactly the same on the original footage. Its not become worse when I made this mp4.

The thing I think look strange is that the stutter almost looks like a line beacuse its visible on so many frames on the same spot...
Click to expand...

It might be whatever you're using to playback the file on your end. Do you see the stutter in the original out of camera file?
 
if the t2i is supposed to create similar results to the 5d, the compression did take a toll on the image compared to the 5d and 7d. sometimes all it takes is one leap to mp4.

i'm not saying the problem was not there in the original file. it was there, it's just too apparent because most of the image is out of focus and pixel-ated and too much tearing from the out of focus part. it happens in a soft out of focus area. probably adjusting the focus, steadying the camera and lowering the shutter a lit bit would help.

the processor on the camera might not be fast enough to handle all that was going on, trying to figure out what is in focus and what was not.
 
I mainly just see heavy compression artifacting that I assume was caused by the web compression and upload. Usually H.264 from these cameras doesn't look that bad because they have a high bitrate.

The shutter speed (1/50) and that level of stutteriness are appropriate to 24p

What bitrate was the MP4 file you made? Because if that's what it looks like out of the camera as you assert, then...well..I don't believe you.

Ok I checked. Your video is at half the recommended bitrate of a vimeo upload (which I consider to be the recommended minimum bitrate for HD uploading, 6400), and less than 1/10th the bitrate the camera records in. That's why it looks...awful. As for vertical lines I don't really see anything. I was searching for a weird stutter shearing effect and for fixed-pattern noise sometimes associated with CMOS sensors.

http://www.cambridgeincolour.com/tutorials/image-noise.htm

http://theory.uchicago.edu/~ejm/pix/20d/tests/noise/1000thsec-16added-alt.gif
 
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You are all absolutely right that my footage is out of focus badly shakey and so on.. Still I just wanted to know if this stutter shearing effect is common and something I have to live with and learn how to avoid...
The stutter shearing fx is on the original footage aswell its not more or less on this low bitrate mp4. (alot of other compression artifacts is showing on this mp4..)

I didn´t mean to be negative or show some bad stuff from the Canon 550d I ´m just trying to learn how to avoid these sorts of thing and thanks for all the good answers and taking time. I´ll take away the footage...

Cheers
 
it's easier on the processor if you make it clear what is in focus and what is not.
steadying the camera.
maybe lowering the shutter just a touch what's the next step you have after 1/50.


just so you know, the 180 degree shutter technically is not the same as 1/48th of a sec, there is some delay and lag and shake in the mechanical system.

one more note, just blindly going by what is "standard" has nothing to do with art.
 
I can only choose 1/30, 1/40, 1/50 and so on I´ll guess I can try 1/40 and see how it looks. I tried 1/60 by mistake last night and I got some very strange strobing FX or something rolling..
I guess that has something to do that I live in sweden a PAL land with 50Hz power also...

It would be awesome if I could set the shutter in smaller steps so could dial in exactly what I´m looking for...
 
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