automatic swing recording and slow motion playback with kinovea

[pathfindr]

LED lights for high speed recording without flickering.

I was replying to an old post but couldn't attach any picture. So I decided to make a new post in case the info may be helpful to folks.

Tested many LED lights. The LED lights I am using for my setup are 2 of this 300W LED 42000LM https://www.amazon.com/gp/product/B07XG37F14
It has a constant current LED driver (See attached picture.) and won't cause flickering when recording at 120fps or higher. (Most LED lights cycle on/off to save energy but will cause flickering.).
It's also UL Listed.

The picture is from a 2FT unit (https://www.amazon.com/Hykolity-Indu.../dp/B071R1Y4VM) that I just got but I think 4FT has a similar driver.

The beam angle is 120 degrees. I have to put black plastic (black garbage bags work great) around the lights to focus the light down and avoid washing out the projector screen.

Hope this info is helpful.

[kirkemg]

how do you attached the black garbage bags to the light structure? Does the heat pose any issues with plastic bags? thanks

[pathfindr]

No issues. I taped the plastic bags to the side of the light. I just received a message from someone who just purchased the light and experienced flickering. They might have changed the component or design of that light. It appears it's no longer non-flickering. You may want to look at some other lights instead. I have since switched to a new track based light when I moved my setup from garage to inside in Dec 2021. see this link https://gunghogolf.com/articles/indo...video-lighting

Also see my other post about my new light setup https://golfsimulatorforum.com/forum...071#post372071

[solta]

Hello everyone,
I Just got it all working, except one thing.
I'm running two camera setup, recording at 100FPS.
Now once the recorded video automatically plays - it plays just a bit over 1x speed, so i move the slider to desired 10 to 15%, but once it plays a next new vid the slider goes back to 1x speed. Anybody knows a workaround please?

Only thing that helped me was recording at 330FPS - then it automatically plays at around 10%. But i like the picture resolution, exposure and all much more in 100FPS mode.
Thanks!

[rastam4n]

Did you find a solution for this?

[rastam4n]

joan - I cannot post on the Kinovea forum, not sure if that is by design or a bug?

inorkuo

Hi there, I am just leaning about Kinovea and stumbling about trying to gather as much info as I can before I start building my own 2 camera, instant slow motion playback, I just wonder if the above scripts are still needed? I only ask because OP has not updated since 2017.

Is there a step by step for the software setup, I have not it yet?
Thank you for all your effort, looks like there was a lot of work involved in getting this working.
Chears
Pete

[rastam4n]

preludesam Wow, thanks so much for all this information, I think I need to get better lighting before I do much more camera adjustment. I did get the audio trigger to work, and I was able to save a work space, so I kinda see how this will work, just open 2 instances of Kinovea and select the corresponding workspaces, I wonder if there is a way to instruct Kinovea which workspace to open for each instance?
This global shutter thing completely escaped me while I was doing research, that is a bit frustrating, but they were inexpensive enough, and I have other uses for them. Today, I took a look at global shutter cameras, it is just a bit confusing regarding which cameras will work with Kinovea. Do you have any camera suggestions that don't break the bank?

[rastam4n]

Okay, I have it pretty well setup except for the flickering... lighting will be next on the list.
I have a few questions, how do you flag a video to keep or review later? I'm already using 5gb of space, so purging will need to be done daily I expect.
There is quite a lag between when the shot is recorded to when the shot is displayed, do I just need a faster computer or is the lag caused by something else? I estimate the lag is maybe about 1 min? Maybe a bit less?

[preludesam]

I just saw this a year latter sorry…

If you look in the manual you can use %% in the file name. It basically tells the file system to overwrite so you don’t save every swing but you also don’t fill up a terabyte drive in one night with 100+ swings.

[PantsParty7]

Can someone please take a look at these videos, and tell me what's going on to cause the glitchy flickering in one of them? Is it a faulty camera or do I have something not set up right maybe? There were no differences between the setup and they were taken just a couple minutes apart. The camera is an OV9281 btw.

[PantsParty7]

...second link

[Tft]

Hi joan I had the script set up and running well a few months ago, and then i had to put away the computer, now that I’m trying to get it going again, the preferences file for different instances seems to be the same. I can manually open the shortcuts created but they are revert back to one of the configs.
did anything change? How can i troubleshoot this? Thanks

[ri3eboi]

I recently purchased two of the OV4689 cameras, the RYS HFR USB 2.0 variant. I can get 322 fps in 640x330, however only get 33 fps for 1280x720 when it is advertised for 120fps.

Am I out of luck? What can I do to get 120 fps?