Please have a look at - http://answers.splunk.com/answers/206524/how-to-associate-schema-with-data-in-hunk.html.
Thx for the link - is there anything that needs to be done in transforms/props to support the schema options, or is it basically point Hunk at the data and have at it?
For Avro just point to the data and if the file extension is .avro you are set.
However, If the file extension is different you will need to modify this flag in the provider or VIX
vix.splunk.search.recordreader.avro.regex = .avro$