automatic swing recording and slow motion playback with kinovea

[Joshua1745]

There are a lot of choices all similarly priced by ELP.

For face on you probably need 2.1mm non fisheye, or smaller number if you can find it. If you have the PS eye camera you can do a comparison using a calculator. I believe that's a 1/4" sensor and the OV2710 is a larger 1/2.7" sensor. I would suggest finding a camera that you already have and then use a lens calculator to decide what focal length lens you will need for the OV2710 sensor. I used the below lens calculator to decide.

https://www.pointsinfocus.com/tools/depth-of-field-and-equivalent-lens-calculator/#{"c":[{"f":13,"av":"8","fl":50,"d":3048,"cm":"0"}],"m":0}

I went with this version of the OV2710 because it included a case and has a CS lens mount. It's easier to find a cheap CS lens with a large aperture for better light performance since most of us are playing in dark conditions.

[cooke23]

I have 2 2.1mm ones and they work great for both DTL and FO angles. The FO is best if you can get it more than 4ft away but mines at like 2ft away from ball position and I can see what I need to see on it. I angle mine down to ball

[Jai]

There are a lot of choices all similarly priced by ELP.

For face on you probably need 2.1mm non fisheye, or smaller number if you can find it. If you have the PS eye camera you can do a comparison using a calculator. I believe that's a 1/4" sensor and the OV2710 is a larger 1/2.7" sensor. I would suggest finding a camera that you already have and then use a lens calculator to decide what focal length lens you will need for the OV2710 sensor. I used the below lens calculator to decide.

https://www.pointsinfocus.com/tools/depth-of-field-and-equivalent-lens-calculator/#{"c":[{"f":13,"av":"8","fl":50,"d":3048,"cm":"0"}],"m":0}

I went with this version of the OV2710 because it included a case and has a CS lens mount. It's easier to find a cheap CS lens with a large aperture for better light performance since most of us are playing in dark conditions.

Not many positive reviews for this camera. Do you have a video you can post? I'm curious to see what output you get from the camera.

[Joshua1745]

I should receive it this weekend. Its the same camera as the others so I'll let you know.

[Jai]

I'm looking forward to reading your review. Thanks.

[Joshua1745]

Well, the camera looks and feels very nice. The aluminum case makes it feel like a true industrial camera and more importantly has a tripod mount.

However, I am seeing no improvement over the PS3 eye. Picture is very dark and if I increase the gain for improvement it just becomes grainy with little color. I've spent a fair amount of time working on the settings in Kinovea and I also tried another similar OV2710 camera which was just the board and a 2.8mm lens (m12 mount) and I get a similar result. Even reducing the frame rate to 60 fps doesn't provide improvement. The exposure is the limiting factor and anything fast enough to freeze action produces a poor picture. If you are actually OK with the quality of the cameras picture then I would recommend the version I received with the full metal case and tripod mount. However, in your case you would also need a 2.1mm lens (CS mount with that case). I have a point grey flea3 with a 1/2" sensor and that camera blows away these cameras in that dark environment. It's firewire and I cannot get it to work with Kinovea. Can anyone comment on their settings for the ov2710 camera especially what setting they use for exposure and can anyone comment if they're using any additional lighting to improve the picture.

[NinjaB]

I keep getting the same error that bbjr was getting in post 26... I followed the all the steps multiple times, but can't get rid of this error. Any ideas?

I got the same error, but was able to install it by:

Save the Audiozonetriggerinstaller.exe file
Right click the .exe and Run as Administrator.
Worked fine after this.

[NinjaB]

Finished getting this set up and it is working great! Thanks for all the hard work on this, the youtube tutorial was extremely helpful.
One setting in VLC I had to change was the Continue playback? mine was set to ask by default, needed to change it to always.

[elibott]

This thread has been fantastic. I am just about there. I have my swings recording upon triggering the sound. I just cannot get the playback aspect to work. Has anyone had issues with that? VLC is not launching at all.

[inorkuo]

In case others run into this issue, I wrote the script using the 32 bit version of vlc. If you use the 64 bit version it won’t work.

[Boverton]

Will a 2.8-12 mm camera lens work 4 to 6 foot DTL and FO?

[inorkuo]

Will a 2.8-12 mm camera lens work 4 to 6 foot DTL and FO?

i have a 2.1mm lens and have my dtl camera 9ft away.

[Boverton]

Ok so the Amazon purchase doesn’t sound like an option. I’ll grab the 2.1off ebay.
Thanks.

[htdumps]

Has anyone tried the OV4689 from KAYETON. Looks like they just started selling via Amazon.

Resolution & frame :

1920X1080 MJPEG 60fps

1280X720 MJPEG 120fps

640X360 MJPEG 330fps

Edit:
Ordered and will post results.

[Stingreye]

If it’s not too late to cancel, I have 2 I am not using.

[htdumps]

Too late to cancel, any reason why you are not using them? Did they work well with Kinovea?

[Stingreye]

They are sold now. The cameras didn’t perform well in my dimly lit sim room. They require a lot of light to get a decent image. The Logitech BRIO’s performance in low light conditions sold me on that one. In experimental kinovea it will do 120 FPS at lower resolution.

[StodgyBarley]

Hi! I ordered the ELP USB with 2.1 mm Lens and it has been great for the front on view. I have about 3 to 4 feet so not much room but his does pretty well. I can't get the entire swing in the picture but most of it.

My DTL view is about 10 feet so my question is should I only order a 2.8 mm Lens for DTL instead of the same 2.1 mm? I am currently using PS3 but find it very very grainy compared to my ELP 2.1 mm camera. Thanks!

[htdumps]

Have you tried a 1.8mm lens for the front view? Im in a similar space situation.

[StodgyBarley]

No... never tried a 1.8 mm. Did you get one in the end?

[htdumps]

Not yet the cameras I have are working close range.

[htdumps]

Got the cameras they work except for one hiccup on the script. Unfortunately Kinovea 8.15 only allows for a delay of the OV4689 to be set to 2 seconds. On the experimental builds I am able to delay up to 20 seconds. Using the script with the older version of Kinovea the swing gets recorded too short. Thanks again for this amazing script!!! If you are still developing it let me know I have some ideas that could help out others. If anyone has questions about the cameras let me know.

[htdumps]

The 8.15 limits the ram to 1024

[inorkuo]

with two of the ov2710 cameras at 640x480 at 120fps i can get 4 seconds of live delay with the stable version of kinovea so it makes sense that at 330fps, it would be cut in half. i played with the expermental version of kinovea and it would crash with two logitech brio's running at 120fps. at 90fps, it was a better but would still crash after several recordings. are you using one camera or two?

[htdumps]

Two cameras. Have you tried 8.26 it has been really stable.

[htdumps]

Update: The cameras are very sensitive to light. After moving them into the hitting room the LED overhead lights made them completely unusable at 330fps (tremendous flickering). Anyone have recommendation for lighting for high fps shooting?

Update 2: 6500k t8 fluorescent bulbs work great.

[htdumps]

Here is a face on view.

[inorkuo]

here is the script updated for kinovea experimental version 8.26.

[inorkuo]

32bit version of vlc or 64?

[htdumps]

32 bit version

[inorkuo]

It’s probably something to do with the file naming. Try changing the file names to “1 - 2” and “3 - 4”.