[lug] Video recording with continuous playback

[Steve Sullivan]

Thanks for the comments!

I'm a novice at video so probably my question wasn't clear.
What I'm looking for is, all within a single small Linux laptop:

  * Camera, such as USB camera or tablet internal camera.
    Logitech C920 was recommended -- USB connected would be fine.

  * Software to continuously buffer the video stream, adding
    60 seconds delay.

  * Playback, to continuously display the delayed stream
    on the tablet's screen.  VLC?

So what you see on the screen is whatever the camera saw 60 seconds ago.
Almost certainly we won't have any network access.

Do you have recommendations on how to do the video buffering,
or what small laptop might be appropriate?

Many thanks,

Steve


On Wed, Mar 07, 2018 at 12:57:19AM -0700, Bear Giles wrote:
> No networking? Then I guess transmitting a signal to a transceiver 30
> light-seconds out wouldn't work either.
> 
> On Tue, Mar 6, 2018 at 4:59 PM, <stimits at comcast.net> wrote:
> 
> > You might find a USB webcam using the standard "USB Video Class" is a very
> > simple solution if you don't mind adding a USB camera (e.g., the Logitech
> > C920). So long as it doesn't take a custom driver you could install (and
> > capture) with "guvcview". There are other applications which can work with
> > USB standard cameras, this particular one is easy and reliable. I suspect
> > there would be no issue getting the application to work with all kinds of
> > smaller/mobile devices if they run Linux.
> >
> > ----- Original Message -----
> > From: Steve Sullivan <steve.sullivan at mathcom.com>
> > To: lug at lug.boulder.co.us
> > Sent: Tue, 06 Mar 2018 22:17:40 -0000 (UTC)
> > Subject: [lug] Video recording with continuous playback
> >
> > Hi, I want to put a cheap netbook / chromebook / ipad / whatever
> > on a tripod recording divers on a team at the swimming pool.
> > There'd be simultaneous playback, delayed about 60 seconds later.
> > That way the divers could hop out of the pool and see what
> > they've just done.
> > There are apps that do this for phones, like
> > https://itunes.apple.com/us/app/bam-video-delay-for-coaching-and-personal-
> > training/id517673842?mt=8
> > https://chrome.google.com/webstore/detail/replay-it-sports-video-de/
> > dcdhimjnicocbcjhmfcjlooncidccanl?hl=en
> > Then I thought, why not Linux? Does anyone have experience
> > with this? What hardware and software would you recommend?
> > Many thanks,
> > Steve
> > --
> > ========================================
> > Steve Sullivan steve.sullivan at mathcom.com
> > 720-587-7498 <(720)%20587-7498> http://www.mathcom.com
> > ========================================
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-- 

========================================
Steve Sullivan      steve.sullivan at mathcom.com
720-587-7498        http://www.mathcom.com
========================================