# PVC and Super Quality configuration (/en/realtime-media/rtmp-gateway/build/optimize-quality-and-monitor-events/pvc-and-super-quality-configuration)

> For AI agents: see the complete documentation index at [llms.txt](/llms.txt).

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

## Understand the tech [#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 [#implementation]

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

```json
{
  "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 [#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 [#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

<CalloutContainer type="info">
  <CalloutDescription>
    Test different saving ratios with your actual content to determine optimal settings before deployment.
  </CalloutDescription>
</CalloutContainer>

## When to use PVC [#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