Github user jskora commented on the pull request:
https://github.com/apache/nifi/pull/252#issuecomment-198408663
@joewitt, the attribute names are created by Tika and seem to be based on
the source file types. The core Tika module was already in the project and the
Tika parsers module appears to add ~600KB to the NAR. Also, this is named
"ExtractMediaMetadata" because using Tika allows it to support over 1,000 file
types, instead of just WAV files, and allows it to be extended with custom
parsers.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
