It's rather strange to pass the entire SDP as a parameter.
Why not just pass the codec specific parameters only?
e.g. --codec-fmtp='octet-align=1' --codec-fmtp='mode-set=0,1,2,3,4,5,6,7'

How do I parse it and set the params in dec_fmtp?

https://github.com/pjsip/pjproject/blob/master/pjmedia/src/pjmedia/stream_common.c#L110

You can make it simpler by requiring the parameter to have no whitespace, so:

• find '='
• if '=' exists {anything before '=' is fmtp name, anything after '=' is fmtp val } else {everything is fmtp val}

https://github.com/pjsip/pjproject/blob/master/pjmedia/src/pjmedia/stream_common.c#L110

You can make it simpler by requiring the parameter to have no whitespace, so:

• find '='
• if '=' exists {anything before '=' is fmtp name, anything after '=' is fmtp val } else {everything is fmtp val}

So do you want me to factor this out? What about passing this to the codec? Should I also factor out parts of pjmedia_stream_info_parse_fmtp?

What I mean is to add new parameter --codec-fmtp and provide very simple parsing in pcaputil to put it in dec_fmtp.

What I mean is to add new parameter --codec-fmtp and provide very simple parsing in pcaputil to put it in dec_fmtp.

Done, with a small refactoring.

The failed test looks unrelated to my changes. @sauwming please review.