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Can Alexa, Amira, Red SDI-record-signal trigger recording on Atomos Ninja Star recorder ?

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#1 Thomas Gottschalk

Thomas Gottschalk


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Posted 26 May 2017 - 05:59 AM

Hello all,


I am interested in an Atomos Ninja Star Recorder to use it onboard my rig. Its an HDMI recorder, small and lightweight.

As I work with Alexas, Amiras and REDS that only output SDI Video I would have to use a SDI to HDMI converter to feed the Ninja Star.

Atomos builds a converter for this purpose: Atomos Connect S2H (SDI to HDMI). 

For an onboard recorder it would be essential to automatically start recording whenever the camera on the steadicam is shooting.



Does anyone know, if the SDI Record trigger signal of Alexa, Amira and RED automatically trigger recording of the the Ninja Star?




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#2 Charles Papert

Charles Papert

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Posted 26 May 2017 - 09:55 AM

If you can, get yourself an S2H to test on cameras that output 23.98psf before you buy. The Connect requires that you push a button to initiate the conversion between psf and p (aka, 2:2 pulldown) and I was told that it must be re-enabled if the unit is powered down (didn't get a chance to test this for myself though). It would be easy to forget since the Ninja Star doesn't have a monitor. I would recommend either the Decimator MD-HX or the AJA Hi-5 Plus SDI to HDMI convertors (HX is around 300 and the AJA is a bit more, but smaller), which will do that conversion automatically without having to activate.

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#3 Osvaldo Silvera SOC

Osvaldo Silvera SOC

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Posted 29 May 2017 - 09:57 PM

Have you seen the price of the Samurai Blade recently? It's half the price it used to be when I bought it, Accepts SDI, and definitely accepts the SDI trigger to automatically start recording with Arri cameras, Red cameras, Sony, etc..


 By the time you get the converters and the Ninja your at or above the price of the samurai blade. Currently $495.


just my 2c

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