Issue details

• Video is not being sent to Formant.
• My RTSP camera is not showing video in Formant, but I can connect to it.

Troubleshooting steps

First, gather Formant agent logs:

• Install the Formant agent: Retrieve agent logs
• Install the Formant agent via Docker: Retrieve agent logs

Review the agent log for the following error messages:

"media encoder exited with code -1: core dumped"

This may be caused by an underlying error in media encoding packages. To verify:

1. Run the following command:

apt policy libproxy1v5

If you see the following output:

libproxy1v5:  
  Installed: 0.4.17-2  
  Candidate: 0.4.17-2

There is a known issue with libproxy1v5_0.4.17-2 which is resolved by upgrading to libproxy1v5_0.4.17-3:

sudo apt install ./libproxy1v5_0.4.17-3_amd64.deb

gst_parse_error: could not set property “speed-preset” in element “x264enc0" to “fastest” (4)

Set the FORMANT_ENCODE_SPEED_PRESET environment variable to a supported value: Environment variables for the agent: Media environment variables.

The agent defaults to ultrafast. There is a tradeoff between video quality and lag. We typically see that, depending on the cpu between veryfast and medium, lag starts accumulating.

To optimize video quality and speed, experiment to find the slowest setting that doesn't accumulate lag.

See also

• Add a video stream

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