# Identifying content in an AWS Elemental Link source
<a name="extract-contents-link"></a>

The content in an AWS Elemental Link source is always a transport stream (TS) that contains one video asset, one audio pair, and optional captions. 

Obtain identifying information from the content provider.


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[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/medialive/latest/ug/extract-contents-link.html)

Also obtain the following information about the content:
+ The maximum bitrate. You will have the option to throttle this bitrate when you set up the device in MediaLive. For more information, see [Setting up AWS Elemental Link](setup-devices.md). 
+ Whether the content includes an embedded timecode. If it does, you can choose to use that timecode. For more information, see [Timecode configuration](https://docs.aws.amazon.com/medialive/latest/ug/timecode.html)[Working with timecodes and timestamps](timecode.md). 
+ Whether the content includes ad avail messages (SCTE-104 messages that MediaLive will automatically convert to SCTE-35 messages). For more information about ad avail messages, see [Processing SCTE 35 messages](scte-35-message-processing.md).