I'm experiencing similar issues as stated here:

http://comments.gmane.org/gmane.comp.telephony.freeswitch.devel/6397

Running FreeSWITCH Version 1.4.7-1~64bit (-1 64bit), Debian Wheezy using the official repos

With the following errors:

2014-08-08 15:32:33.116140 [ERR] switch_core_cert.c:210 FP FILE ERR!

[...]

2014-08-08 15:32:33.136126 [ERR] switch_rtp.c:2974 audio DTLS cert err [5]

I'm really lost here, .. I've tried using the -certs parameter, as per reading the source, and mentioned in the

above post.  Stock, the directory: /etc/freeswitch/tls/ existed with a file dtls-srtp.pem that is a pub+priv key

combined.  I tried specifying that directory with the '-certs' argv as well as copying the .pem to .crt, and even

having all four files:

.. exist, with mode +rw all (including the directories themselves)

And no luck, same error, it seems Freeswitch just refuses to see the file, unlike the mailing list post I'm referencing.

Can anyone offer some advice?  P.S. I am using the freeswitch and sipML5 examples -- they work fine with the freeswitch server, so I'm assuming this is the issue.

Thanks, 

A.B. Carroll