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Motion blur in FPV feed
#1
I'm getting a weird motion blur effect in my fpv feed, i initially thought it was noise but i've removed all noise by adding caps and grounding the vtx and cam together. I've swapped out the camera, wrapped the ground wire round both the cam and vtx signal wires but the blur still remains. I have a 1000uf cap about 2/3cm behind the camera, its the first time I've put one there but i've seen many others do it with no problems. I've kept the signal wire around 1cm from motor wires but this has never caused me and issues on other quads.

I'm beginning to think theres a component on the fc that is causing it.. its bizarre.. Huh

I'm running flight one millivolt, tekko32 45a mini, crossfire, unify pro32hv, Caddx ratel, speed shield v2 motors.

Here's the vid showing the issue, it's particularly noticeable when i'm passing trees, ignore the diagonal lines and osd flicker as i've fixed that now. 

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#2
First I would try to connect the camera video directly to the VTX (so bypass the FC) to see if it helps.

If yes, then the FC is likely the culprit.
If not, then either the camera or the VTX causes it and you can investigate further (change camera and or VTX).
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#3
(12-Aug-2019, 10:49 AM)izzy26 Wrote: First I would try to connect the camera video directly to the VTX (so bypass the FC) to see if it helps.

If yes, then the FC is likely the culprit.
If not, then either the camera or the VTX causes it and you can investigate further (change camera and or VTX).

i was hoping to not have to do that as it's wired perfectly right now but i guess i need to give it a try, i'll report back
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#4
Do you or one of your buddies you fly with have a CCD camera to try? The Caddx Ratel is a low light CMOS camera, not sure if you've messed with any of the settings or not.
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#5
(13-Aug-2019, 02:57 AM)Sugs Wrote: Do you or one of your buddies you fly with have a CCD camera to try?  The Caddx Ratel is a low light CMOS camera, not sure if you've messed with any of the settings or not.

i only fly with 1 mate and he's got Cmos cameras, i've got a ratel in my other build and theres no issue even straight out the box, i also had a brand new camera i tried with this set up and the issue was still there. I have just switched it to colour/day mode and also night mode but the issue is still there.

So i've swapped the flight controller out with a brand new one and the problem still persists, now the only the thing to check is the vtx which i'll check tomorrow by connecting the camera directly. Is there any chance a pigtail could cause this?

The motion blur is there even without the motors running

Heres a pic of my build if someone see's something that could be causing the issue...
- cap behind the fc next to the vifly buzzer was added after i discovered the issue, it did help fix the diagonal lines and the osd flicker.
- yellow wire wrapped in ground to cam and green wire wrapped in ground to the vtx are the signal wires.
- i originally had a 1000uf 50v cap as i'm running 6s but i changed it to a 1000uf 35v to see if it would help, but no difference
 
I've tried a different vtx antenna on the same pigtail but longer so its far from the immortal-t but no difference.

The unify pro32 hv is stuck down solid because of its big surface area and 3m tape, i'm dreading taking that out if its the problem, i may try moving the cap behind the cam to the arm.. Huh

i'm rabbling...

[Image: XkpkMUbl.jpg]
[Image: M9XyMVCl.jpg]
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#6
I could see maybe having static or short range with a bad pigtail, but not what you are experiencing. I would definitely try the camera direct to VTX like Izzy suggested, and the VTX direct to lipo pads since you have the HV version of the Pro32, if its not already wired like that.

Does it look like this on another pair of goggles?
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#7
It's almost like the shutter speed is running too low. That's really odd.

The ground is for dead people.
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#8
(14-Aug-2019, 06:27 AM)Sugs Wrote: I could see maybe having static or short range with a bad pigtail, but not what you are experiencing.  I would definitely try the camera direct to VTX like Izzy suggested, and the VTX direct to lipo pads since you have the HV version of the Pro32, if its not already wired like that.

Does it look like this on another pair of goggles?
I did try the cam and vtx direct to the lipo initially but there was noise so i just grounded them together on vbat and powered both off the fc, it looks the same in other goggles.
(14-Aug-2019, 08:47 AM)Banelle Wrote: It's almost like the shutter speed is running too low. That's really odd.

So today i made it my mission to fix this as i've got the day off and there's no flying occurring due to rain. Before de-pinning and wiring direct to the vtx, i thought i'd get into the settings of my working quad to compare and possibly induce the same issue to see what is causing it as its also got the ratel. I tweaked all the settings one by one until i found something similar with the 3DNR function when it induced a slight blur when i increased it. So i went back to the problematic quad and messed with the settings again and i think i've fixed it or reduced it considerably. I still need to do a test flight before i can celebrate. I had 3DNR set to 5 which was causing the motion blur, reduced it to 0 and i went away, i increased it to 30 so its obvious in the dvr.. vid below..

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#9
Weird. Apparently that's '3-dimensional noise reduction', and it looks like it's designed to work with the at-night features. https://www.vivotek.com/website/3dnr/

Glad you got it fixed!

EDIT: that is a crazy amount of settings. I've never seen a fixed shutter on an FPV camera before.

The ground is for dead people.
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#10
That's a weird setting, I wonder what its supposed to be used for. Hopefully that's it.
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#11
(14-Aug-2019, 03:44 PM)Banelle Wrote: Weird. Apparently that's '3-dimensional noise reduction', and it looks like it's designed to work with the at-night features. https://www.vivotek.com/website/3dnr/

Glad you got it fixed!

EDIT: that is a crazy amount of settings. I've never seen a fixed shutter on an FPV camera before.
yea a ridiculous amount of settings, that link explains a lot! i'm not really flying in the dark so that setting will be staying off. Thanks!

(14-Aug-2019, 03:50 PM)Sugs Wrote: That's a weird setting, I wonder what its supposed to be used for.  Hopefully that's it.

hope so, still grounded by the rain and wind here in the uk but hopefully i get a few packs in soon!

Thanks all for the help troubleshooting!
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#12
managed to gt some packs in today, the video is sorted! Big Grin Big Grin Big Grin Thumbs Up
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