Issue details

• Video is not being sent to Formant.

Troubleshooting steps

First, gather Formant agent logs:

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

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.

Options from fastest (least CPU time) to slowest (highest quality):
"ultrafast"
"superfast"
"veryfast"
"faster"
"fast"
"medium"
"slow"
"slower"
"veryslow"

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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