logo

Live Production Software Forums

www.vmix.com

Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error
intermittent scan lines on DSLR hmdi input - My Nikon d5100 camera gives me scan lines, but not all the time
Options
Go to last post Go to first unread
Previous Topic Next Topic
grDancer  
#1 Posted : Tuesday, June 23, 2020 3:06:07 AM(UTC)
grDancer

Rank: Advanced Member

Groups: Registered
Joined: 5/12/2016(UTC)
Posts: 53

Thanks: 30 times
Was thanked: 1 time(s) in 1 post(s)
I don't really know whether it's a monitor problem or actually a problem on the video I'm recording. It looks fine on my secondary (old) monitor, but shows up on my new one, which I'm assuming is because it's got a faster response time.

Sometimes the incoming video looks fine, no scanlines, other time it's quite pronounced. Nothing I'm doing in between causes the change.

Could this be:
a) camera overheating or other hardware fault
b) interface issue (decklink mini recorder 3)
c) faulty hdmi cable
d) wrong setting on vmix

Camera's HDMI output says 25fps 1080p
Decklink frame rate on the input seems to default to 50i even when I try to make it 25p.

My master frame rate is set to PAL 25p

I did have to update the camera firmware with a jailbreak firmware in order to get the HDMI feature. Could it just be that?
Back to top

Wanna join the discussion?! Login to your vMix Forums forum account, or Register a new forum account.
Back to top  
Vince Beck  
#2 Posted : Tuesday, June 23, 2020 6:45:33 AM(UTC)
Vince Beck

Rank: Advanced Member

Groups: Registered
Joined: 7/28/2019(UTC)
Posts: 351
United States
Location: Santa Rosa

Thanks: 1 times
Was thanked: 53 time(s) in 51 post(s)
Those lines are usually due to interlacing. They would be especially visible when you move the camera from side to side.

This is likely due to your Decklink capturing at 1080i. Check the deinterlacing option in your input settings and play with those.
Back to top
WWW
thanks 1 user thanked Vince Beck for this useful post.
grDancer on 9/6/2020(UTC)
grDancer  
#3 Posted : Sunday, September 6, 2020 11:37:56 PM(UTC)
grDancer

Rank: Advanced Member

Groups: Registered
Joined: 5/12/2016(UTC)
Posts: 53

Thanks: 30 times
Was thanked: 1 time(s) in 1 post(s)
Sorry for delayed reply to this - I think I sorted it because I was trying to output at 1080p, but the camera can only do 720 (or whatever "one lower than 1080" is) without the interlacing. I had selected the 1080 option on the camera, but it was 1080i, I think, which is why it was giving the scan lines, as suggested above.
Thanks!
Back to top
Users browsing this topic
Guest (2)
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Privacy Policy | Powered by YAF.NET | YAF.NET © 2003-2024, Yet Another Forum.NET
This page was generated in 0.075 seconds.