Tennis with TWO In/Out Net Devices

[@djamelaitali3902]

What do you think of your IN OUT device in retrospect? Do you still have it? Do you recommend it? What are the main drawbacks?

[@benjaminrodriguez2918]

It's an amazing concept. The best part of using it live (I recommend 2 net devices) is an "instant replay" - where you can go and actually watch the last 10 balls, whether it was really in or out. I wouldn't use the alarm, as it didn't work reliably (i.e. false calls). Then again, I haven't used it in about 3 years, so maybe he has improved on it. And when I say "he" - from when I contacted him, it was a solo operation. Drawbacks - it can be a nuisance to set up and calibrate. I am not a fan of technology when it becomes a distraction. So you might look into SwingVision if you have an iPhone. I haven't used that, though. You also need to be a bit of a technology geek. You need to be able to update firmware, extract files, etc. All that being said - if you live in the continental US, I would be happy to give you mine. Like I said, I haven't used it in 3 years. Let me know if you want it.

[@absmith4639]

At about 22:48 in the video, on your settings, it switches from "match" mode to "practice" mode, maybe that's why it wasn't that accurate after? I just ordered two of them with two line callers, and was searching about more information about it and found your videos

[@benjaminrodriguez2918]

I don't know why it does that... definitely a bug, but I think unrelated to accuracy. I think the biggest issue with accuracy is the small L bracket that comes with it. It only has one strap, and when you hit the net with the ball, the vibration moves the device. It's supposed to recalibrate itself, but... I wouldn't rely on it. We have since bought the Carbon Fiber bracket... it has a longer stem and two straps. I recommend the rubber straps... the hose clamps take too long to install (unless you're installing it permanently). I did an experiment where I overlaid the x,y coordinate data from the output file over the GoPro video... you can see the ball and dot get farther apart through the video... it looks to me like it's inline with the camera (i.e. indicates that the net shakes moved the camera). You can see that here: kzbin.info/www/bejne/poK0f6Wdg7KlqtE

[@absmith4639]

@@benjaminrodriguez2918 Ok cool thanks for your reply, I actually just tested the ones I ordered out earlier today and then went back to watch your video. That overlay video looks pretty cool. I'm still trying to figure out the devices. We played a set and it seemed pretty good for most of the calls but didn't pick up a few of them, but the calls it did make, seemed accurate. I was thinking if it's in practice mode and you're serving, it might not pick it up. Also I was on a green court, and saw you were too, I wonder if it would work better on a blue hard court... but the thing you told me about the devices moving when it hits the net makes sense.. we just realigned it a few times during change overs because we kept pressing buttons on it and also charged it up a bit, but didn't think about the posts vibration.. but it missed some calls somethings, it didn't say out or in, that's the only thing I was wondering about... a few of them were maybe too far out so missed it, but one of them was close, I wonder an AI problem... or maybe it's better to power off the devices after each set because the memory gets too full and the CPU slows down like a computer.. I'm not sure.. but thanks anyways for the reply, I don't have any notifications turned on but just happened to check back now

[@samirzakur]

You've tested it with carbon fiber support?

[@benjaminrodriguez2918]

Yes - the carbon fiber support is a significant improvement. In fact, I would say it is necessary - the L bracket is basically useless as it moves too much when the net is hit.

[@knokekc]

Are they still in business? Don't respond to emails.

[@benjaminrodriguez2918]

Sorry, I have no idea. I stopped using mine about 3 years ago... it was a fun experiment, but I never got it to go well enough to use it seriously. It seems like they have released 2 new versions of hardware since the one I bought, though.

[@yatsomitai]

Hi. Can you set the device higher? Like on the umpire chair for better overview? And would it work?

[@benjaminrodriguez2918]

I don't think it would improve the performance... it uses cameras, and the farther back you put them, the less resolution it would have... especially toward the far side of the court. I think the best setup is 2 devices on the net, using the carbon fiber cage.

[@yatsomitai]

@@benjaminrodriguez2918 thanks!