Live Transcoding

The <LiveTranscoding> block defines which transcoding presets are enabled for an application. When active, incoming streams are automatically transcoded into additional quality levels based on the selected presets.

Available in: mono, origin, transcode

Sample Configuration

LiveTranscoding block

xml

<LiveTranscoding enabled="true">
    <Preset name="360p" />
    <Preset name="480p" />
    <Preset name="720p" />
</LiveTranscoding>

Parameters

Parameter	Description	Default
`LiveTranscoding:enabled`	Enables or disables live transcoding for this application.	`false`
`Preset:name`	Name of a transcoding preset. Must match a preset defined in the `<Transcoder>` section of `config/preferences.xml`.	—

You can enable multiple presets to generate several quality variants of the same stream simultaneously. Each transcoded variant is published as a separate stream with the preset's suffix appended to the original stream name. For example, a stream mystream with the 720p preset (suffix _720p) would produce an additional stream named mystream_720p.

Important

Presets referenced here must be already defined in the global <Transcoder> configuration block. For details on creating and configuring presets, see the Transcoder Configuration guide.

Transcoding in a Cluster

In a cluster setup, the transcode-type application is dedicated to transcoding tasks. When an origin application has transcoding enabled, it can delegate the actual encoding work to connected transcode nodes, offloading the CPU/GPU-intensive processing from the origin server.

If a standalone mono application has transcoding enabled, it handles both ingesting and transcoding on the same machine.

Environment Variables

All parameters support environment variables using the ${EV:VARIABLE_NAME} syntax. Fields locked by environment variables cannot be modified via the REST API.

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