YamlOutput exports invalid JSON

[vladinator1000]

Hi guys, I noticed that in Python when exporting a .json file like this:

aggregated_pool = PoolAggregator(defaultStats = stats)(current_extractor)
YamlOutput(filename = someName, format = 'json')(aggregated_pool)

When there is a nan or inf value, the exporter doesn't put it in a string, which triggers an exception when trying to import the .json file.

[dbogdanov]

How does the resulting Json file look like?

According to JSON specification, there is no Infinity or NaN values, and, in the first place, there shouldn't be any inf or nan values produced by Essentia's algorithms. Can you provide an example script and audio input to reproduce those values?

[vladinator1000]

Sure thing, this repo should reproduce it: https://github.com/savovs/essentia-json-bug

I'm using the UrbanSound dataset. For some reason I didn't get the nan value when I reran the extraction so the example only has the inf case.

[dbogdanov]

Thank you for reporting, this should be fixed now. On a side note, note that Extractor algorithm is somewhat outdated (#691), and it can make sense using MusicExtractor or FreesoundExtractor instead.