SDR-to-HDR Tone Mapping Parameters

SDR content is automatically tone-mapped to HDR when requested. The default SDR-to-HDR pipeline relies on the zimg image processing library for scaling and tone mapping, while an advanced ColorFront engine provides enhanced control. Tone mapping parameters are managed via the tonemap block.

<?xml version="1.0"?>
<query>
    <userid>[UserID]</userid> <!-- required -->
    <userkey>[UserKey]</userkey> <!-- required -->
    <action>[Action]</action> <!-- required -->
    <source>[SourceFile]</source> <!-- required -->
    <format>
        <output>[mp4|mpegts|apple_prores]</output> <!-- required-->
        <hdr>[hdr10|hlg]</hdr>
        <tonemap>
            <engine>[zscale|cfe]</engine>
            <target_nits>[Target max CLL level]</target_nits>
            <hdr_boost>[HDR Boost]</hdr_boost>
        </tonemap>
    </format>
</query>

{
  "query": {
    "userid": "[UserID]", // required
    "userkey": "[UserKey]", // required
    "action": "[Action]", // required
    "source": "[SourceFile]", // required
    "format": {
      "output": "[mp4|mpegts|apple_prores]",
      "hdr": "[hdr10|hlg]",
      "tonemap": {
        "engine": "[zscale|cfe]",
        "target_nits": "[Target max CLL level]",
        "hdr_boost": "[HDR Boost]"
      }
    }
  }
}

Parameter	Description	Allowed Values	Default Value
tonemap	Configures SDR-to-HDR tone mapping settings		none
engine	Tone mapping engine	zscale - zimg processing library cfe - ColorFront engine	zscale
target_nits	Target max CLL level specified in nits. Default: 203 for zscale, 600 for cfe	100-1000
hdr_boost	cfe only - HDR Boost. Controls the strength of the HDR effect	0-1	0.4