PVC and Super Quality configuration

This guide explains how to enable low-bitrate high-definition features (PVC) for video transcoding on Media Gateway.

Understand the tech

Media Gateway supports enabling PVC (Perceptual Video Coding) or Super Quality functions during video transcoding to achieve low-bitrate high-definition streaming. These features optimize video quality while reducing bandwidth requirements.

Implementation

Enable PVC or Super Quality when creating a stream configuration template.

{
  "settings": {
    "transcoding": {
      "video": {
        "enabled": true,
        "width": 1920,
        "height": 1080,
        "fps": 30,
        "bitrate": 0,
        "advancedOptions": {
          "superResolution": {
            "enabled": true,
            "alphaBlending": 256
          },
          "pvc": {
            "enabled": true,
            "saveBitrateRatio": 20
          }
        }
      },
      "audio": {
        "enabled": true,
        "profile": 3
      }
    }
  }
}

Advanced options

• pvc.enabled: Set to true to enable PVC
• pvc.saveBitrateRatio: Percentage of bitrate to save
• superResolution.enabled: Set to true to enable Super Quality
• superResolution.alphaBlending: Super Quality intensity from 1 to 256

Relationship between PVC and bitrate

• When video.bitrate is missing, output bitrate follows the source stream bitrate
• When video.bitrate is 0, output bitrate is calculated automatically based on resolution and frame rate
• When video.bitrate is explicitly set, output bitrate matches the specified value and saveBitrateRatio has no effect

When to use PVC

PVC is useful when:

• You have fixed encoding bitrate requirements
• Available bitrate is insufficient for acceptable quality without PVC
• Bandwidth is severely constrained