[syslog-ng] Handle multiple encoding from multiple sources

Hello, I'm trying to understand how syslog-ng handle charset encoding. I've seen that : - without the "encoding("charset")" keyword in the source it just writes to the output what it gets from the input. - with the "encoding("charset")" keyword in the source it converts what it gets from the output from "charset" to UTF-8. What is the best way to handle logs from different charset? Do I really have to create a different source per charset used ? Is there any way to say that I always want the input's charset to be converted to UTF-8 before writing my logs ? Thanks David