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by richardcgiroux
Thu Jun 02, 2016 2:36 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Looking for a camera cable extension - 200ft
Replies: 19
Views: 3418

Re: Looking for a camera cable extension - 200ft

After further testing, the initial delay appears to be network related.

When I set the maximum bandwidth to 5000000, the latency drops to 115ms. Setting to 2000000 gets me to 100ms.
by richardcgiroux
Thu Jun 02, 2016 1:07 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Looking for a camera cable extension - 200ft
Replies: 19
Views: 3418

Re: Looking for a camera cable extension - 200ft

After success on the Pi3, I substituted a Pi Zero v1.3 at the camera end. I expected to take a small hit on the latency but I am getting strange results. 640x480@60fps - 100ms (up from 80ms on the Pi3) 1280x720@30fps - 150ms (up from 130ms on the Pi3) 1280x720@60ms - 2500ms (up 2400ms on the Pi3) Co...
by richardcgiroux
Wed Jun 01, 2016 5:28 pm
Forum: Camera board
Topic: Pi Zero v1.3 - Camera latency...help
Replies: 3
Views: 1426

Re: Pi Zero v1.3 - Camera latency...help

That is brilliant! Thanks.
by richardcgiroux
Wed Jun 01, 2016 5:00 pm
Forum: Camera board
Topic: Pi Zero v1.3 - Camera latency...help
Replies: 3
Views: 1426

Pi Zero v1.3 - Camera latency...help

I am trying to get a low latency camera system using a PiZero at the camera end and a Pi3 as the receiver. 640x460@60fps - 100ms - OK! 1280x720@60fps - 2500ms (2.5 seconds) 1280x720@30fps - 150-180ms Reading end is: omxplayer --fps 90 My question is why, under certain modes, does the PiZero have a l...
by richardcgiroux
Tue May 24, 2016 2:12 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Looking for a camera cable extension - 200ft
Replies: 19
Views: 3418

Re: Looking for a camera cable extension - 200ft

Thanks for your help guys. Using a combination of omxplayer, netcat and rapsivid I achieved my goal: 640x480@30fps - 87ms latency 1280x720@60fps - 100ms latency (I doubt that the video was actually 60fps due to the limits of the Broadcom encoder but higher fps reduced latency) This is a direct Cat5 ...
by richardcgiroux
Sun May 22, 2016 11:52 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Looking for a camera cable extension - 200ft
Replies: 19
Views: 3418

Re: Looking for a camera cable extension - 200ft

Well, this project has been kicking my but. Again, thanks for comments. What is the DPB? Also, I understand that the Pi can decode a 60fps. I've failed at getting the Pi3 to receive and decode the video at anything below 500ms. I've had to use an ODroid-XU4 for decoding which gave me the 180ms resul...
by richardcgiroux
Sun May 22, 2016 3:18 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Looking for a camera cable extension - 200ft
Replies: 19
Views: 3418

Re: Looking for a camera cable extension - 200ft

Thank you all for your responses and it was as I suspected. I looked at the bandwidth of the Mipi interface and it is huge (800Mbs per pipe). Thank you though for your detailed responses...you guys are awesome. The reason for the question has to do with two issues when using two Pis. 1. The size of ...
by richardcgiroux
Sun May 22, 2016 6:10 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Looking for a camera cable extension - 200ft
Replies: 19
Views: 3418

Looking for a camera cable extension - 200ft

There are some pretty smart guys on this forum so I thought I'd post my problem. I need to move just the Pi camera 200ft from the Pi. Not the whole Pi, just the camera. What this means, of course, I need a way to transmit the MIPI CSI2 signals over a long distance and frankly, I can't find anything ...
by richardcgiroux
Sun May 15, 2016 2:06 pm
Forum: Beginners
Topic: RPi3 Raspbian and Gstreamer1.0
Replies: 2
Views: 1785

RPi3 Raspbian and Gstreamer1.0

I have a new RPi3 and I just downloaded the latest image of Raspbian216-05-10. I need the latest Gstreamer installed with OMX support so here are my questions: 1. Other forums say that Gstreamer1.0 is already installed in the new image but I don't see it there. 2. What version of the Gstreamer and G...

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