Detect encoding type from rtsp streamings

Hi, All.

Is it possible to detect encoding types from rtsp streaming?
I saw that the element typefind can determine the media-type of a
stream  but the only examples I found always use a file.

I use the example from
https://gstreamer.freedesktop.org/documentation/application-development/advanced/autoplugging.html?gi-language=c
and replace the plugin filesrc with rtspsrc but I get a error.

So I imagine that It is not possible or that I need something more to
get success.

Regards.
A.