[rtmpdump] On audio-only RTMP streams...

[PLTK]

Hello.

Currently, rtmpdump does not "get along" with audio-only RTMP streams.
I have searched the archives and found out a previous discussion on
this issue according to which determining the correct format (audio or
video) of the stream is not trivial and cannot be done in advance
automagically by the program itself.

The thing I want to ask is:
If the user "knows" that the RTMP stream is audio-only could he use a
command-line switch so that the stream can be recorded by rtmpdump and
played?
Is something like that a "do-able" programming task so that can be
included in RTMP?

Regards.