Marks on gh4 footage

Discussion in 'Micro Four Thirds Forum' started by hobbieandhoanie, Sep 5, 2017.

  1. hobbieandhoanie

    hobbieandhoanie New to SC

    5
    Sep 5, 2017
    Capture.PNG Is there anyone who knows what these marks are on 4K footage and some still shots? There is a long line that looks like a dirt line from top to bottom just to the right of the center screen which shows up especially on color sections of the shot but disappears where the footage is very light or washed out. This line is not dust spots or banding that I am talking about. It is a very faint long line but distinct when viewed in photoshop or premiere pro. I am able to touch it up in photoshop for stills but the footage is ruined every time. What is this? Look at the zoomed shot attached.
     
  2. gryphon1911

    gryphon1911 SC Top Veteran

    609
    Feb 6, 2015
    Central Ohio, USA
    Andrew
    Looks like an issue with the sensor to me. Is it in the same place every time?
     
  3. hobbieandhoanie

    hobbieandhoanie New to SC

    5
    Sep 5, 2017
    Yes - That line is in the exact same place with every shot. By the way - Thanks for the reply. I thought about cleaning the sensor but have not gone that route yet.
     
  4. Luke

    Luke Super Moderator Subscribing Member

    Nov 11, 2011
    Milwaukee, WI USA
    Luke
    Looks like a column of bad pixels...I doubt cleaning will have any effect.

    Does the camera have a "pixel refresh" function?
     
    Last edited: Sep 5, 2017
  5. gryphon1911

    gryphon1911 SC Top Veteran

    609
    Feb 6, 2015
    Central Ohio, USA
    Andrew
    I agree that cleaning would most likely do nothing. It definitely looks like a line of messed up pixels. As Luke stated, I would try doing some kind of pixel mapping function, if that camera has it and see if that does not fix it.

    My guess, though, is that this is something that would need sent in for repair.
     
  6. hobbieandhoanie

    hobbieandhoanie New to SC

    5
    Sep 5, 2017
    ___________________________________________________________________________________________________

    Well - Update on the Pixel Refresh function:
    It did not work (unfortunately) I tried it a couple of times.
    It looks like a repair shop will be visited.
    This is the mystery pixel line after the pixel refresh.
    Capture_II.PNG
     
  7. hobbieandhoanie

    hobbieandhoanie New to SC

    5
    Sep 5, 2017
    __________________________________________________________________________
    Ok Guys, Now I have the solution to broadcast.
    The sensor was "broken" basically - a defective sensor.
    The entire M-Box which consists of the sensor, and the encasement with front lens attachment and 4 ribbons on the inside, had to be replaced.
    I would say that this piece is half of the camera.
    It costs $850.00.
    I know! That is shocking!
    It was either that or scrap the camera.
     
    • Sad Sad x 1
  8. gryphon1911

    gryphon1911 SC Top Veteran

    609
    Feb 6, 2015
    Central Ohio, USA
    Andrew

    Ouch. Sorry to hear that.
     
  9. donlaw

    donlaw SC All-Pro Subscribing Member

    Sep 14, 2012
    Texas
    Don
    Wow... Expensive repair. But less than a replacement camera.
     
  10. hobbieandhoanie

    hobbieandhoanie New to SC

    5
    Sep 5, 2017
    Yes I investigated the replacement method but it was not cost effective. I got a warranty with the repaired sensor. The $850.00 was tax included and I picked it up which also saved on shipping charges.