# frameRate

> Frames per second.

## Definition

* **Type:** Field
* **Namespace:** [UnityEditor.Media](/engine/6000.6/script-reference/unityeditor/media.md)
* **Assembly:** UnityEditor

```csharp
public MediaRational frameRate
```

### Remarks

Expressed as a fraction so that rates such as 29.97 (precisely 30000/1001) are represented accurately.

**Note**

Specifying a 0 or invalid rate (see [MediaRational.isValid](/engine/6000.6/script-reference/unityeditor/media/mediarational/isvalid.md)) indicates the video track uses Variable Frame Rate (VFR). In this mode of operation, because there is no pre-defined frame duration, all frames added through [MediaEncoder.AddFrame](/engine/6000.6/script-reference/unityeditor/media/mediaencoder/addframe.md) must use the overload that receives a [MediaTime](/engine/6000.6/script-reference/unityeditor/media/mediatime.md).