[PD] Gem: Looking for suggestions for camera / capture setup

Csaba Láng langcsaba at gmail.com
Tue Mar 9 12:16:03 CET 2021


If you wanna see some example videos, download the Rayaction squash app,
register (preferably with email as some functions are buggy still) and
check out the video under each exercise.


On Tue, Mar 9, 2021 at 11:39 AM Csaba Láng <langcsaba at gmail.com> wrote:

> Hi All,
>
> I have made an interactive squash system with Pd based on Basler's high
> speed cameras for machine vision. I use mainly above 200fps of 5 USB-3
> cameras each of them on a separate USB bus.
> The balls can fly with a 200km/s speed and I hardly have a problem
> analyzing their position with pix_movement.
> Surely the biggest problem is having a display with a similar fresh rate,
> but if you do not need to render the image then it is fine.
> The computer is a 3GHz processor and 32MB RAM with Ubuntu 19.04 if I
> remember well.
>
> Best,
> Popesz
>
>
> On Tue, Mar 9, 2021 at 11:07 AM Max <abonnements at revolwear.com> wrote:
>
>> On 09.03.21 07:05, Peter P. wrote:
>> > * Max <abonnements at revolwear.com> [2021-03-09 02:01]:
>> >> Hi List,
>> >>
>> >> what's a good setup for a decent framerate (50, 60 fps or even
>> higher?) HD
>> >> live capture from Gem? Is it even possible?
>> >>
>> >> A related problem is that ideally I would like to have Gems framerate
>> be
>> >> driven by the capturing, so that I'm sure not to have missed frames or
>> have
>> >> captured the same frame twice. Is there a solution to that?
>> >
>> > I would love to learn about is as well! Have you tried searching for SDI
>> > on the mailing list archive?
>>
>> I had a glance. I was hoping to get less general advice, preferably
>> concrete proven setups running on Linux.
>> I see there are decklink drivers, are there users out there who can
>> report achieved framerates and latencies from Gem? Which sensor module
>> are they using?
>>
>> Anyone has a DeckLink Duo 2 Mini for example?
>>
>> m.
>>
>>
>>
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>
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