topic Re: minimize latency in video streaming in i.MX Processors

minimize latency in video streaming

zohargolan — Mon, 21 Feb 2022 17:36:14 GMT

Hi All,

I am in the evaluation phase of the i.mx8m plus for a camera application. I am using boundary device nitrogen8mp for the evaluation purpose.

I am running the following GStream command: gst-launch-1.0 v4l2sink ! waylandsrc

I can stream video from the camera to display with several issues:

1. The video is not occupying the whole display and I still have the desktop header shown on the top

2. I have a latency of about 1/4 sec from camera to display. This is a critical parameter for me and will not work for my requirements.

Is there a way to reduce the latency to a sub frame latency?

I appreciate any comment,

Zohar

Re: minimize latency in video streaming

b36401 — Tue, 22 Feb 2022 04:19:09 GMT

As far as I know default latency in gstreamer is 200ms as a compromise between realtime and quality.
You can set something like latency=100 to low the latency.

Re: minimize latency in video streaming

zohargolan — Tue, 22 Feb 2022 05:18:14 GMT

Hi b36401,

Thank you for your answer.

I would you go about setting the latency to latency =100 like you've mentioned? Where would you set it up?

Zohar

Re: minimize latency in video streaming

b36401 — Wed, 23 Feb 2022 03:34:07 GMT

I mean you can add "latency=100" into the commandline parameters you pass to gstreamer.

Re: minimize latency in video streaming

zohargolan — Tue, 01 Mar 2022 21:17:05 GMT

This doesn't work in the configuration I have and I am getting

root@nitrogen8mp:~# gst-launch-1.0 v4l2src latency=50 ! waylandsink
WARNING: erroneous pipeline: no property "latency" in element "v4l2src0"

Re: minimize latency in video streaming

EESTE — Sun, 26 Jun 2022 03:26:42 GMT

I'm running into the same issue.

Did you get a solution to this by any chance?