This problem has been reported several times in JIRA as well as lists without a proper solution. The problem is that the A-Leg runs a little ahead than the B-Leg in the recording only. The actual conversation is clear. I have following inputs to it:

1) This happens when the calls are made from a specific network and for calls that go beyond 20 minutes.

2) I tried this on Ubuntu 12.04 as well as Ubuntu 13.10, the problem still remains the same.

3) I've tried this with multiple version of freeswitch and the latest one I tested with is the following version: Version 1.5.12b+git~20140419T062924Z~f408dae2af~64bit (git f408dae 2014-04-19 06:29:24Z 64bit). In all versions the problem is consistent.

4) I tried with suppress-cng=true as well as false but the problem is still there.

5) I've added parameters like "bridge_generate_comfort_noise=true" before bridge.

6) I've tried with "record_waste_resources=true" before calling record_session.

7) I've tried with "record_fill_cng=true" before calling record_session.

None of these helped me in solving this problem. I understand that it is something in the network probably, but I'll be greatful if anyone can point me for what to check on the network!! When can freeswitch record_session introduce such problem so that I can start looking into those directions. The endpoint being used was Grandstream GXP-1400. Is there a specific condition under which the freeswitch recording channels can go out of sync?? Because it starts well but suddenly when the conversation reaches 15-20 minutes the overlapping starts; meaning the channels start going out of sync !! Any help or pointers will be of great help.

Thanks,

--- Jayesh