Convert output of ExtractMediaMetaData to JSON

[Buntu Dev <bu...@gmail.com>]

I'm trying to convert the output of the ExtractMediaMetaData to JSON using
AttributesToJSON processor but the result seems to be still binary of the
JPEG image. How do I convert the output of ExtractMediaMetaData to JSON?

Also, there are some attributes such as "Blue Colorant", etc. How do I list
these attributes as comma-seperated list in the AttributesToJSON config?


Thanks!

Re: Convert output of ExtractMediaMetaData to JSON

[Koji Kawamura <ij...@gmail.com>]

Hello,

Maybe you've already figure it out, but I think your AttributesToJSON
processor's 'Destination' property is set to 'flowfile-attribute' (by
default).
If so, created JSON is written in 'JSONAttributes' attribute. If you'd
like it to be as content of outgoing FlowFile, please use
'flowfile-content' instead.

For the 2nd question, you can concatenate attribute values with NiFi
Expression Language "join" function.
https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html#join
UpdateAttribute processor can be used to add concatenated attribute
before AttributesToJSON.
But I don't know if there's any EL function to join attribute name and
value together. Join joins values only.

Hope this helps,
Koji

On Wed, May 3, 2017 at 1:00 PM, Buntu Dev <bu...@gmail.com> wrote:
> I'm trying to convert the output of the ExtractMediaMetaData to JSON using
> AttributesToJSON processor but the result seems to be still binary of the
> JPEG image. How do I convert the output of ExtractMediaMetaData to JSON?
>
> Also, there are some attributes such as "Blue Colorant", etc. How do I list
> these attributes as comma-seperated list in the AttributesToJSON config?
>
>
> Thanks!