Is there a way to sync start multiple SJ7 Stars?

Discussion in 'SJ7 Star' started by Michael Toole, Mar 20, 2018.

  1. Michael Toole

    Michael Toole New Member

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    I have 2 SJ7's and i put one each behind a soccer goal to film the goal keeper and to see her view of the game. Is there a way to sync start both at the same time?

    Also, is there a way to increase the wifi-distance?

    Thanks..
     
  2. RBEmerson

    RBEmerson Humbled by events

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    This question has been asked before and AFAIK nobody has reported success with exactly simultaneous starts. Extending WiFi range is out of the question in an outdoors location like a soccer pitch. Indoors, using a WiFi repeater would help, but dragging extension cords around to power the repeaters won't be much fun.

    If you want to shoot through the net at either end, consider this: Plan on shooting non-stop for the entire match. A 32 Gb SD in each camera will work for 1080 @ 60 fps. If you want to shoot 4K @ 30 fps, plan on using 128 Gb SD's. Use an external battery pack for each camera. 50,000 mAh packs are surprisingly inexpensive from eBay. Finally, find someone with a smart phone who's willing to run the Flash app, too (two phones with Flash - your phone and your accomplice). That will get a near simultaneous start without having to sprint the length of the pitch to start the other camera.

    Take the batteries out of the cameras (really) and then mount the cameras (tripod, tall box, whatever). Connect a battery pack to each camera and then turn the cameras on with the power button. The SJ7 will not automatically power up when an external pack is connected. Enable WiFi and connect each phone to each camera. All that's left is to start the cameras at the same time.

    This is a bit gear-heavy but the internal battery won't last long enough for extended (90 minutes plus time out plus injury time) shooting. Pushing the shutter buttons at the same time works, of course, but with a phone to check each camera's aiming, the odds of getting a good video of the match improve.

    Now... aren't you sorry you asked? [/wink]
     
  3. RBEmerson

    RBEmerson Humbled by events

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    ADDED: Start with a single camera. It's cheaper to verify the idea works before investing in two cameras, two battery packs, etc.
     
  4. Sulev Svilponis

    Sulev Svilponis Elite

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    The easiest way to sync start multiple cameras is to connect all those cameras to a single power source, with the QUICK CAPTURE option ON. Then, by powering the source, all those cameras can start up and recording at the same time. Sure, this is not an elegant solution, but should work pretty reliably. For recording both goals at the soccer field you need pretty large amount of extension cord.
     
    Last edited: Mar 22, 2018
  5. RBEmerson

    RBEmerson Humbled by events

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    Or two people, each with an itchy shutter finger, at either end of the pitch. Probably this isn't an application calling for nano-second precision. [/big wink]
     
  6. Sulev Svilponis

    Sulev Svilponis Elite

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    Last edited: Mar 22, 2018

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