Quantcast Strange Noise Patterns in Video Recording? - digitalFAQ.com Forums [Archives]
  #1  
05-21-2004, 10:20 AM
Hydeus Hydeus is offline
Free Member
 
Join Date: Dec 2003
Location: Omicron Persei 8
Posts: 322
Thanks: 0
Thanked 0 Times in 0 Posts
Hi.
I've captured a sample material from cable, and it is cover by patern noise. This looks like PC power supply noise. This are horizontal luma lines on whole picture, couple pixels in period, mostly static, but drifting up-down-up-....
Any idea how to filter that

I've tryed this type of filters:
Quote:
avisource("capture.avi")
Limiter()
ConverttoYUY2(interlaced=true)
Fielddeinterlace(full=false, blend=false)
TemporalSoften(1,5,8,5,2)
peachsmoother()
Unfilter(60,0)
Undot()
MergeChroma(blur(1.5))
MergeLuma(blur(0.2))
DCTFilter(1, 1, 1, 1, 1, 1, 0, 0)
but it isn't gone a lot (<30%)
__________________
Go for SECAM =)
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Site Staff / Ad Manager
 
Join Date: Dec 2002
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #2  
05-21-2004, 10:43 AM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Hi Hydeus,

Seems like noise geting into your video cables.
The only way to reduce that (if it's being induced in the cable) is by putting filters on your video cable ends. Like ferrite beads. You get those at RadioShack or similar stores.

-kwag
Reply With Quote
  #3  
05-21-2004, 10:59 AM
Hydeus Hydeus is offline
Free Member
 
Join Date: Dec 2003
Location: Omicron Persei 8
Posts: 322
Thanks: 0
Thanked 0 Times in 0 Posts
Thx Karl.
Yes I know that this can be easly separated by analog filters if it comes through cable, but I suspected that maybe there is some avs filters solution.
I'm pretty sure that this comes from my computer, while TV set connected to the same cable gives me clear picture.
__________________
Go for SECAM =)
Reply With Quote
  #4  
05-21-2004, 11:21 AM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Have you tried changing your capture card to a different slot
Sometimes it makes a hell of a difference

-kwag
Reply With Quote
  #5  
05-21-2004, 11:35 AM
Hydeus Hydeus is offline
Free Member
 
Join Date: Dec 2003
Location: Omicron Persei 8
Posts: 322
Thanks: 0
Thanked 0 Times in 0 Posts
I'll try that Thx.
__________________
Go for SECAM =)
Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
DVD2SVCD: Strange video speed, increases in Avi to KVCD Paulus Video Encoding and Conversion 15 01-02-2004 01:36 PM
Video has Strange framerate? bigggt Video Encoding and Conversion 7 09-07-2003 08:09 PM
Avisynth: What is video noise? syk2c11 Avisynth Scripting 1 10-18-2002 10:38 PM
Recording Video: Strange interleave after capture joinke Video Capturing / Recording 0 09-19-2002 12:10 AM
Video noise on DVD? obrigado Video Encoding and Conversion 3 09-09-2002 11:01 AM

Thread Tools



 
All times are GMT -5. The time now is 06:37 PM  —  vBulletin © Jelsoft Enterprises Ltd