|
11-07-2023, 02:42 PM
|
|
Free Member
|
|
Join Date: Nov 2023
Posts: 24
Thanked 1 Time in 1 Post
|
|
|
Hi, I'm just doing some test with different setups.
I'm curious what can you deduce just inspecting this image.
In the screenshot you can see me, 2 years old. There's a very weird pattern, I don't know why. It appears every time there is low light, but maybe I wouldn't notice it with the equipment I'm going to buy.
The video was shot by a JVC camera, the same that is playing the tape.
The left image was deinterlaced with QTGMC Slower, the right one with QTGMC Faster.
Video captured by Blackmagic Intensity Pro, with Blackmagic Media Express and AVI Motion JPEG codec.
|
|
Someday, 12:01 PM
|
|
Ads / Sponsors
|
|
Join Date: ∞
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
|
|
|
|
|
11-07-2023, 03:02 PM
|
|
Free Member
|
|
Join Date: Oct 2021
Location: Spain
Posts: 112
Thanked 4 Times in 4 Posts
|
|
|
Bad capture card, bad codec, all bad.
|
|
11-07-2023, 03:51 PM
|
|
Free Member
|
|
Join Date: Nov 2023
Posts: 24
Thanked 1 Time in 1 Post
|
|
|
Yes, of course I know. I'm waiting for the new equipment I've bought. It's just a test. Have you ever seen that strange pattern? Can a new equipment solve it or it's just an original artifact?
I don't use any TBC. I suppose my new Panasonic ES10 should remove that little weavy perimetral side line
|
|
11-07-2023, 04:10 PM
|
|
Free Member
|
|
Join Date: Jan 2016
Posts: 400
Thanked 77 Times in 70 Posts
|
|
|
What video cable are you using?
|
|
11-07-2023, 04:14 PM
|
|
Free Member
|
|
Join Date: Nov 2023
Posts: 24
Thanked 1 Time in 1 Post
|
|
|
I'm using a composite cable
|
|
11-07-2023, 07:04 PM
|
|
Free Member
|
|
Join Date: Jul 2023
Posts: 311
Thanked 35 Times in 34 Posts
|
|
|
Looks like "herringbone noise" which is usually related to oversharpening/processing somewhere in the chain. On a CRT, most likely it wouldn't be visible at all.
I guess the question you have to ask is when that noise shows up. Is it after your deinterlace, or was it there before it was deinterlaced?
You might as well try capturing in some other format than motion jpeg and seeing if that gives a different result, such as any of the lossless codecs.
|
The following users thank aramkolt for this useful post:
johnEtna (11-08-2023)
|
|
11-07-2023, 11:30 PM
|
|
Free Member
|
|
Join Date: Jul 2023
Posts: 311
Thanked 35 Times in 34 Posts
|
|
|
You might also make sure everything is plugged into the same outlet as ground loops can also cause similar noise:
https://www.youtube.com/watch?v=O6XWqokPDio
The example above isn't great in that it's also not an ideal capture setup, but it shows that ground loops can affect not only audio, but also video.
Lots of things can throw off a lot of electromagnetic interference with fluorescent and LED lights in particular adding quite a bit of noise to mains as well.
|
The following users thank aramkolt for this useful post:
johnEtna (11-08-2023)
|
|
11-08-2023, 02:46 AM
|
|
Free Member
|
|
Join Date: Nov 2023
Posts: 24
Thanked 1 Time in 1 Post
|
|
|
Wow! I had no clue about this herringbone noise.
I tried every other codec possible, lossles and lossy, but the noise was always there.
My pc and the camera were connected to different outlets, you are right.
I must try to acquire the video again, following your advice.
Thank you, in the next days I'll update you!
|
All times are GMT -5. The time now is 11:31 AM
|
