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Radiotvpat1982  
#1 Posted : Saturday, May 4, 2019 12:22:26 AM(UTC)
Radiotvpat1982

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Hello, I am interested if anyone is currently using a regular camera plugged in to a spark, then sending that signal back to the switcher over something like a nano station? Curious what the latency is like, how does it look being sent NDI-HX, and how far out are you going with it?

I recently using my PTZ optics camera and send NDI-HX out of the camera to a nano station then over to the switcher. Very little delay and able to control the PTZ camera.
elvis55  
#2 Posted : Saturday, May 4, 2019 3:57:46 AM(UTC)
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Radiotvpat1982  
#3 Posted : Saturday, May 4, 2019 6:04:46 AM(UTC)
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Thanks for a link to that video. Do you think the latency would be less if it were through a spark and not RTSP from the camera?

300ms is slightly better than what I got doing this through a HDMI to Lan converter.
ask  
#4 Posted : Saturday, May 4, 2019 9:11:12 AM(UTC)
ask

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The Spark is NDI|HX so latency will be the same as the PTZOptics camera.
Radiotvpat1982  
#5 Posted : Sunday, May 5, 2019 4:21:31 AM(UTC)
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But the PTZ optics camera does not have to convert HDMI to NDI-HX. It comes directly out of the camera. I am hoping and maybe assuming that there wont be much added delay going camera-HMI-Spark-Nano Station but curious if anyone has some real examples they have done before I buy a spark. Also I am considering the Kiloview instead of the spark since it already contains a batter and a mount
Radiotvpat1982  
#6 Posted : Tuesday, May 28, 2019 11:47:30 AM(UTC)
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Following up to my own post. I was going to get a spark but came across a deal on a Birddog mini. I have tested this with a Ubiquiti access point and have very minimal delay. After talking to the nice folks at Birddog they recommended I limit my transmitting to 720 @ 60 FPS due to bandwidth. I am fine with that, and so far testing has gone well. NDI HX would be a smaller bandwidth but a slightly longer delay according to the Birddog reps.
mjgraves  
#7 Posted : Wednesday, May 29, 2019 1:00:13 AM(UTC)
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Originally Posted by: Radiotvpat1982 Go to Quoted Post
But the PTZ optics camera does not have to convert HDMI to NDI-HX. It comes directly out of the camera. I am hoping and maybe assuming that there wont be much added delay going camera-HMI-Spark-Nano Station but curious if anyone has some real examples they have done before I buy a spark. Also I am considering the Kiloview instead of the spark since it already contains a batter and a mount


The signal path is fundamentally similar. The video stream from the sensor is RGB. It gets encoded, whether internally or externally.

I would expect NDI|HX to be marginally faster than normal RTMP.
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