How to compile, debug and install a plugin?

Replying to myself: 

> Following your remark, I've tried to feed a pipe as a file input. This

> is failing, I get an error
> "demux_wavpack: (open_wv_file:127) open_wv_file: non-seekable inputs 
> aren't supported yet."

I've searched the sources for this and found it in
"combined/demux_wavpack.c", not too surprising after that message.
I'm trying to play an MPEG .ts file, why does wavpack speak up here?

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