Anyone else having Ninja trouble at 23.97? at DVinfo.net

Jacques Mersereau · September 16th, 2013, 12:17 PM

Had a colleague bring in a couple of Ninjas. When we went to shoot 23.97 on our Sony EX3s, both had trouble locking in the signal. We did use some AJA HA5s to convert from HDSDI to HDMI however.
That said once we went to 29.97, they didn't have an issue.

Gary Huff · September 16th, 2013, 09:17 PM

Were you providing motion for the Ninjas to detect cadence with?

Jacques Mersereau · September 26th, 2013, 12:34 PM

Hi Gary,

I am not sure what you mean. Yes, we were sending 23.97 video signal to the Ninja.
I have never heard of any device needing video signal that has motion - like an object moving around in the frame before it could sync, but since every camera's signal does change slightly = noise floor fluctuation, I guess my answer would be yes.

Again, 29.97 was the same signal and that got the Ninjas to both sync.

John Mitchell · October 1st, 2013, 06:31 AM

23.976P is normally embedded in a 29.97P stream with pulldown - thats what he meant by cadence. I'm reasonably certain that is the way the EX3 does it. Maybe the pulldown flags were lost in the sdi - hdmi conversion? Shouldn't be tho.
Can you set the Ninja to look for pulldown? I know I can on my Nano..

Jacques Mersereau · October 1st, 2013, 07:11 AM

The Ninjas were a owned by a colleague. I'll have to check about this next go around.

So, you have not had any issues with 24psf?

TIA!

September 16th, 2013, 12:17 PM	#1
Jacques Mersereau Trustee Join Date: Mar 2002 Location: Ann Arbor, MI Posts: 1,334	Anyone else having Ninja trouble at 23.97? Had a colleague bring in a couple of Ninjas. When we went to shoot 23.97 on our Sony EX3s, both had trouble locking in the signal. We did use some AJA HA5s to convert from HDSDI to HDMI however. That said once we went to 29.97, they didn't have an issue. __________________ Jacques Mersereau University of Michigan-Video Studio Manager

September 16th, 2013, 09:17 PM	#2
Gary Huff Inner Circle Join Date: Jan 2013 Location: Austin, Texas Posts: 2,006	Re: Anyone else having Ninja trouble at 23.97? Were you providing motion for the Ninjas to detect cadence with?

September 26th, 2013, 12:34 PM	#3
Jacques Mersereau Trustee Join Date: Mar 2002 Location: Ann Arbor, MI Posts: 1,334	Re: Anyone else having Ninja trouble at 23.97? Hi Gary, I am not sure what you mean. Yes, we were sending 23.97 video signal to the Ninja. I have never heard of any device needing video signal that has motion - like an object moving around in the frame before it could sync, but since every camera's signal does change slightly = noise floor fluctuation, I guess my answer would be yes. Again, 29.97 was the same signal and that got the Ninjas to both sync. __________________ Jacques Mersereau University of Michigan-Video Studio Manager

October 1st, 2013, 06:31 AM	#4
John Mitchell Contributor Join Date: Jul 2005 Location: Sydney Australia Posts: 873	Re: Anyone else having Ninja trouble at 23.97? 23.976P is normally embedded in a 29.97P stream with pulldown - thats what he meant by cadence. I'm reasonably certain that is the way the EX3 does it. Maybe the pulldown flags were lost in the sdi - hdmi conversion? Shouldn't be tho. Can you set the Ninja to look for pulldown? I know I can on my Nano..

October 1st, 2013, 07:11 AM	#5
Jacques Mersereau Trustee Join Date: Mar 2002 Location: Ann Arbor, MI Posts: 1,334	Re: Anyone else having Ninja trouble at 23.97? The Ninjas were a owned by a colleague. I'll have to check about this next go around. So, you have not had any issues with 24psf? TIA! __________________ Jacques Mersereau University of Michigan-Video Studio Manager