Making videos without weird artifacts

[cavemanbass]

Hello TB recordists,
tried searching - google, blackmagic, and now TB - but could not locate an answer to what might be compression artifacting - not exactly a recording questions, but appreciate if anyone can point me in the right direction since many TB members are making awesome looking bass videos.
I'm trying to make a bass video, using GoPro 9 and Davinci Resolve. When I open the video in Resolve, the bass strings have a really annoying aliasing thing going on - stripey shiny artifacts along the length of the string, instead of the nice linear look of real life. Roundwound or flatwound, both have it. To a lesser extent other metal objects like the bridge and frets. This is even in still images, or video where the strings are not moving.
I've seen enough videos to know that there must be a solve. Thank you in advance for any help!

 

[seamonkey]

Could be your lighting or your camera
Most low cost cameras on cell phones have rolling shutters, and strobing by lighting can interfere. It can cause what you're seeing or horizontal rolling banding.
You can try movie lights that don't strobe.
On the cheap, some compact florescent lights can flash at 20khz and effectively don't strobe. You have to let them warm up 10 minutes or more to get to full brightness.
High end LED lighting designed for studios are very good but $$$

 

[cavemanbass]

thank you @seamonkey, that makes a lot of sense. Really appreciate the input!
I'm using decent (not high end) LED lights that are made for video, started wondering if shutter speed on the camera is interacting with refresh rate of the lights. I saw an article suggesting a multiple of 60 for shutter speed (due to 60hz A/C here in US), so I'm going to try 120 and test this afternoon. The GoPro was set for auto shutter speed before.

 

[DirtDog]

@cavemanbass - did you figure out your issue?

On cameras where you can change the setting, a good rule of thumb is to set your shutter speed at 2x your FPS rate. Eg 24 FPS, see shutter speed to 1/48. For 30 FPS, 1/60 FPS. This explains it better than I can: Shutter Speed, Frame Rate and the 180° Rule

24 or 30 FPS are good for the type of video you’re doing. If there was more motion (eg sports video) you might want 60 or even 120 FPS.

I have a Go Pro 10 and I honestly don’t know if I can change shutter speed (manually). I most often use one of the stock settings

 

[cavemanbass]

@cavemanbass - did you figure out your issue?

On cameras where you can change the setting, a good rule of thumb is to set your shutter speed at 2x your FPS rate. Eg 24 FPS, see shutter speed to 1/48. For 30 FPS, 1/60 FPS. This explains it better than I can: Shutter Speed, Frame Rate and the 180° Rule

24 or 30 FPS are good for the type of video you’re doing. If there was more motion (eg sports video) you might want 60 or even 120 FPS.

I have a Go Pro 10 and I honestly don’t know if I can change shutter speed (manually). I most often use one of the stock settings

Thanks DirtDog, appreciate the link! After some research I set my gopro to shutter speed of 1/60th, and use 30fps which improved results for me. Your gopro should have the same settings btw - it's not very flexible, but you can choose manual shutter speed at 1/30, 1/60, 1/120, etc. And then the camera chooses ISO to get correct exposure.