# Identifying content in a CDI source
<a name="extract-contents-cdi"></a>

The content in a CDI source always consists of uncompressed video, uncompressed audio, and 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-cdi.html)