# Characteristics for video and audio sources
<a name="inputs-video-audio-characteristics"></a>

**Orientation**

MediaLive supports any aspect ratio — landscape or portrait.

**Input frame rate**

MediaLive only supports constant frame rate (CFR) inputs. It does not support variable frame rates (VFR).

**Other characteristics**


| Container | Video characteristics | Audio characteristics | 
| --- | --- | --- | 
| CDI—MediaLive only supports these characteristics for CDI inputs. |  [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/medialive/latest/ug/inputs-video-audio-characteristics.html)  |  [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/medialive/latest/ug/inputs-video-audio-characteristics.html)  |