Is This Noise In My Video Related To Lighting? Help With 7D...

Faymus Media

Faymus Media

Well-known member
i have done a bunch of test videos with my canon 7D and it seems the noise on the wall, like block or square pixles, are just flickering and they look horrible...if you look against the walls carefully in this video you will see what i mean...

i had 2 lights, facing the table at different directions.....when i encoded this for regular dvd it looked like junk...

This video was done with the superflat picture style, i have also tried fujita velvia and its about the same...

video is at the bottom...

here is my workflow...

1.copy file to hard drive the raw .mov file
2.convert to quicktime with avid DNxHD
3.A)edit and grade in premiere pro, with newblue film effects
B) +5 contrast, +25 film contrast, -20 brightness, 25% blue, -65 saturation
4.export to either mpeg 2, 2-pass, 1080p, 40mbit, OR mpeg 2 blu-ray...mts file....

i have also tried mp4....just wondering any tips or tricks or better codecs to avoid this...

it seems there is no noise on the wall before grading...seems clean on the first file....watch the video below in 1080p...

http://www.youtube.com/watch?v=9iy9EaDY7vQ
 
did you go 8 or 10bit DNxHD?

there will always be a limit to what you can grade before hitting the limit wall of quality.

you can get the look you want closer in the camera before recording so you would have a better starting point.
 
You know what. Let's do this:

1. Upload a frame of video in PNG or other uncompressed format right after step 2.

2. Do the same for a frame right after 3b.

3. You are going to lose some quality at step 4. Why are you using Mpeg2? Are you going to DVD with this?

If there is no noise on the wall before grading, I am inclined to think it's the codec choice or a poor set of effects. Or you're simply pushing things to the breaking point.

When you asked me these things before about your "look" I didn't realize you had done all this to them. I thought you had lit to get this look.
 
NextWaveG said:
It almost looks like banding from too low of a color depth.
Click to expand...


i used superflat, which has low, color tone, saturation, and less contrast for a wider dynamic range, at least thats what alot of people on the web are doing, so i tried it..

PerroneFord said:
You know what. Let's do this:

1. Upload a frame of video in PNG or other uncompressed format right after step 2.

2. Do the same for a frame right after 3b.

3. You are going to lose some quality at step 4. Why are you using Mpeg2? Are you going to DVD with this?

If there is no noise on the wall before grading, I am inclined to think it's the codec choice or a poor set of effects. Or you're simply pushing things to the breaking point.

When you asked me these things before about your "look" I didn't realize you had done all this to them. I thought you had lit to get this look.
Click to expand...


i have mpeg2 codec, the mpeg2 blu-ray(m2t), h.264, and cineform .mov(doesnt work)

where can i get more encoding options for premiere? also i shot it in a warm 4000k light, and i graded with newblue fx film look.....
 
Last edited:
Whether you're shooting 35mm or with a Thompson Viper, mid tones are where you'll always see your noise. The trick is to excite some elctrons in your frame with some hard light and use some contrast.

However, what I saw in your clip looked (to me) like banding caused by pushing the limited color depth of 4:2:0 too far.
 
bill totolo said:
Whether you're shooting 35mm or with a Thompson Viper, mid tones are where you'll always see your noise. The trick is to excite some elctrons in your frame with some hard light and use some contrast.

However, what I saw in your clip looked (to me) like banding caused by pushing the limited color depth of 4:2:0 too far.
Click to expand...


is there a way around this? and what would have pushed it?

in premiere settings go +/- 100

here was my settings

contrast -5
brightness -20
film contrast +20
saturation -60
blue tint +30

any suggestions? also when i purchase my sony ex1r will it still do this?

thanks again
 
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