# Identifying content in an HLS source
<a name="extract-contents-hls"></a>

The content in an HLS container is always a transport stream (TS) that contains only one video rendition (program). 

Obtain identifying information from the content provider.


****  

|  Asset  |  Details  | Information to obtain | 
| --- | --- | --- | 
| Video | You don't need identifying information. MediaLive always extracts the single video asset. |  | 
| Audio | The source might include multiple audio PIDs. | Obtain the PIDs or three-character language codes of the languages that you want. We recommend that you obtain the PIDs for the audio assets. They are a more reliable way of identifying an audio asset.  | 
| Captions | Embedded | Obtain the languages in the channel numbers. For example, "channel 1 is French" |